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pure2004：
谢谢这位仁兄，太有用了，就是还差个xls.core.LinkD ...
java操作excel实现从数据库导入导出（三）
这篇文章继续讲关于java操作excel实现数据库导入导出，这篇涉及关于工具类的设计与，数据工具类的涉及，第一篇文章我有提起，关于这个操作我们可以使用多种方式去描述，第一properties这个格式描述，或者另外一种形式使用xml形式去描述！在这个设计中我也做了一些实验，对于xml的解析，我们这边主要采用DOM4J，我们主要导入DOM4J-1.6.1.jar,xstream-1.3.1.jar还有一个javaxen-1.1-beta-6.jar。
其实到现在我们这个模块已经做的七七八八了
接下来我们可以写两个测试类一个是导入的
一个导出的
package xls.util;
import java.io.ByteArrayInputStream;
import java.io.DataOutputStream;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStream;
import java.io.UnsupportedEncodingException;
import java.util.Iterator;
import java.util.List;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;
import org.dom4j.Attribute;
import org.dom4j.Document;
import org.dom4j.DocumentException;
import org.dom4j.DocumentHelper;
import org.dom4j.Element;
import org.dom4j.Node;
import org.dom4j.io.OutputFormat;
import org.dom4j.io.SAXReader;
import org.dom4j.io.SAXValidator;
import org.dom4j.io.XMLWriter;
import org.dom4j.util.XMLErrorHandler;
import org.xml.sax.SAXException;
import org.xml.sax.SAXNotRecognizedException;
import org.xml.sax.SAXNotSupportedException;
import com.thoughtworks.xstream.XStream;
import com.thoughtworks.xstream.io.xml.DomDriver;
/**
* @author panming
* @since 2008-5-6
*/
public final class Dom4jUtil {
/**
* 取锟斤拷Root锟节碉拷
* @param document
* @return
*/
public static Element getRootElement(Document document) {
return document.getRootElement();
}
/**
* 锟斤拷锟斤拷锟街凤拷芨锟绞斤拷锟絰ml锟斤拷锟斤拷
* @param document
* @return
*/
public String getStringDocument(Document document) {
String xmlContent = null;
if(document != null){
xmlContent = document.asXML();
}
return xmlContent;
}
/**
* 锟斤拷锟截节碉拷路锟斤拷
* @param rootNodeName(锟斤拷诘锟斤拷锟斤拷)
* @param childNodeName(锟接节碉拷锟斤拷锟�
* @return String(锟斤拷式锟斤拷锟矫碉拷xPath锟斤拷锟�
*/
public static String getNodePath(String rootNodeName, String childNodeName) {
String result = null;
if (rootNodeName == "" || rootNodeName == null || childNodeName == ""
|| childNodeName == null) {
return result;
}
result = getNodePath(rootNodeName, childNodeName, null);
return result;
}
/**
* 锟斤拷锟截节碉拷路锟斤拷
* @param rootNodeName (锟斤拷诘锟斤拷锟斤拷)
* @param childNodeName (锟接节碉拷锟斤拷锟�
* @param childAttributeName (锟斤拷锟斤拷锟斤拷锟�
* @return String (锟斤拷式锟斤拷锟矫碉拷xPath锟斤拷锟�
*/
public static String getNodePath(String rootNodeName, String childNodeName,
String childAttributeName) {
String result = null;
if (rootNodeName == "" || rootNodeName == null || childNodeName == ""
|| childNodeName == null) {
return result;
}
String dima = "/";
StringBuffer nodePath = new StringBuffer();
nodePath.append(rootNodeName);
nodePath.append(dima).append(childNodeName);
if (childAttributeName != null && childAttributeName != "") {
nodePath.append(dima).append("@");
nodePath.append(childAttributeName);
}
result = nodePath.toString();
return result;
}
/**
* 取锟斤拷Document锟斤拷指锟斤拷锟节碉拷锟铰碉拷锟斤拷锟叫节点集锟斤拷
* @param document (document锟斤拷锟斤拷)
* @param nodeName (锟斤拷式锟斤拷锟矫碉拷xPath锟斤拷锟� "/books/book/@show"
* @return List
*/
public static List<?> getListByDocument(Document document, String nodeName) {
if (document == null || nodeName == null || nodeName == "") {
return null;
}
List<?> list = null;
list = document.selectNodes(nodeName);
return list;
}
/**
* 取锟矫节点集锟斤拷
* @param filePathAndName(xml锟侥硷拷)
* @param nodePath(锟节碉拷xpath锟斤拷锟�
* @return List(锟节碉拷锟叫憋拷)
* @throws DocumentException
*/
public static List<?> getNodeList(String filePathAndName, String nodePath)
throws DocumentException {
List<?> list = null;
if (filePathAndName == null || filePathAndName == ""
|| nodePath == null || nodePath == "") {
return list;
}
list = getListByDocument(readXMLFile(filePathAndName), nodePath);
return list;
}
/**
* @param list
* @param isAttribute
* @return String (锟节碉拷锟斤拷锟斤拷锟斤拷缘锟街�
*/
public static String getNodeValue(Document document,String nodePath, boolean isAttribute) {
List<?> list = document.selectNodes(nodePath);
if (list != null && !list.isEmpty()) {
if (isAttribute) {
return ((Attribute) list.iterator().next()).getText();
} else {
return ((Element) list.iterator().next()).getText();
}
}
return null;
}
/**
* @param key
* @param value
* @throws IOException
*/
public static void setNodeValue(Document document, String nodePath, String value,
boolean isAttribute) {
if (isAttribute) {
List<?> list = document.selectNodes(nodePath);
((Attribute) list.iterator().next()).setValue(value);
} else {
List<?> list = document.selectNodes(nodePath);
((Element) list.iterator().next()).setText(value);
}
}
/**
* @param key
* @param value
* @throws IOException
*/
public static void deleteNode(Document document, String parentNodePath, String nodePath) {
List<?> list = document.selectNodes(parentNodePath);
if(list != null && !list.isEmpty()){
Element element = (Element) list.iterator().next();
List<?> childList = document.selectNodes(parentNodePath + "/" + nodePath);
if(childList != null && !childList.isEmpty()){
Element childElement = (Element) childList.iterator().next();
element.remove(childElement);
}
}
}
/**
* @param key
* @param value
* @throws IOException
*/
public static void deleteAttribute(Document document, String nodePath, String attributeName) {
List<?> list = document.selectNodes(nodePath);
if(list != null && !list.isEmpty()){
Element element = (Element) list.iterator().next();
List<?> attributeList = document.selectNodes(nodePath + "/@" + attributeName);
if(attributeList != null && !attributeList.isEmpty()){
Attribute attribute = (Attribute) attributeList.iterator()
.next();
element.remove(attribute);
}
}
}
/**
* @param key
* @param stringArray
* @param isAttribute
* @throws IOException
*/
public static Element insertNode(Document document, String nodePath,
String[] stringArray, boolean isAttribute) {
Element element = null;
List<?> list = document.selectNodes(nodePath);
if(list != null && !list.isEmpty()){
element = (Element) list.iterator().next();
if(stringArray != null && stringArray.length >= 0){
if (isAttribute) {
element = element.addAttribute(stringArray[0], stringArray[1]);
} else {
element = element.addElement(stringArray[0]);
element.setText(stringArray[1]);
}
}
}
return element;
}
/**
* @param document
* @param nodePath xpath锟节碉拷路锟斤拷
* @param attributeName 锟斤拷锟斤拷锟斤拷锟� * @param attributeValue 锟斤拷锟斤拷值
* @return element
*/
public static Element findNodeByAttribute(Document document,
String nodePath, String attributeName,
String attributeValue) {
Element elementTarget = null;
List<?> list = document.selectNodes(nodePath);
if(list != null && !list.isEmpty()){
for (Iterator<?> iterator = list.iterator(); iterator.hasNext();) {
Element element = (Element) iterator.next();
String str = element.attribute(attributeName).getText();
if (str != null && str.equals(attributeValue)) {
elementTarget = element;
break;
}
}
}
return elementTarget;
}
/**
* @param document
* @param nodePath xpath锟节碉拷路锟斤拷
* @param attributeArray锟斤拷锟斤拷,0为锟斤拷锟斤拷锟斤拷锟�1为锟斤拷锟斤拷值
* @return element
*/
public static Element findNodeByAttribute(Document document,
String nodePath, String[] attributeArray) {
Element elementTarget = null;
List<?> list = document.selectNodes(nodePath);
if(list != null && !list.isEmpty() && attributeArray != null){
for (Iterator<?> iterator = list.iterator(); iterator.hasNext();) {
Element element = (Element) iterator.next();
String str = element.attribute(attributeArray[0]).getText();
if (str != null && str.equals(attributeArray[1])) {
elementTarget = element;
break;
}
}
}
return elementTarget;
}
/**
* @param document
* @param nodePath xpath锟节碉拷路锟斤拷
* @param childNoteValue 锟斤拷锟斤拷值
* @return element 锟较硷拷锟节碉拷
*/
public static Element findNodeByChild(Document document,
String nodePath, String childNoteValue) {
Element elementTarget = null;
List<?> list = document.selectNodes(nodePath);
if(list != null && !list.isEmpty()){
for (Iterator<?> iterator = list.iterator(); iterator.hasNext();) {
Element element = (Element) iterator.next();
String str = element.getText();
if (str != null && str.equals(childNoteValue)) {
elementTarget = element.getParent();
break;
}
}
}
return elementTarget;
}
/**
* 锟斤拷锟斤拷诘锟� * @param element
*/
public static void treeWalk(Element element) {
for (int i = 0, size = element.nodeCount(); i < size; i++) {
Node node = element.node(i);
if (node instanceof Element) {
treeWalk((Element) node);
} else {
}
}
}
/**
* 锟斤拷锟斤拷XMLWriter
* @param filePathAndName
* @return XMLWriter
* @throws IOException
*/
private static XMLWriter getXMLWriter(String fileName)
throws IOException {
XMLWriter writer = null;
writer = new XMLWriter(new FileWriter(new File(fileName)));
return writer;
}
/**
* 锟斤拷锟斤拷XMLWriter
* @param filePathAndName
* @param outputFormat
* @return XMLWriter
* @throws IOException
*/
private static XMLWriter getXMLWriter(String filePathAndName,
OutputFormat outputFormat) throws IOException {
XMLWriter writer = null;
writer = new XMLWriter(new FileWriter(new File(filePathAndName)),outputFormat);
return writer;
}
/**
* 锟斤拷GBK锟斤拷式锟斤拷写锟侥硷拷
* @param filePathAndName
* @param document
* @return boolean
* @throws IOException
*/
public static boolean writeXMLFileByGBKFormat(String filePathAndName,
Document document) throws IOException {
boolean result = false;
result = writeXMLFileByFormat(filePathAndName, document, "GBK");
return result;
}
/**
* 锟斤拷式锟斤拷写锟侥硷拷
* @param filePathAndName
* @param document
* @param encoding
* @return boolean
* @throws IOException
*/
public static boolean writeXMLFileByFormat(String filePathAndName,
Document document, String encoding) throws IOException {
boolean result = false;
XMLWriter writer = null;
OutputFormat format = OutputFormat.createPrettyPrint();
format.setEncoding(encoding);
writer = getXMLWriter(filePathAndName, format);
writeXMLFile(writer, document);
writer.close();
result = true;
return result;
}
/**
* 锟斤拷锟絰ml锟侥硷拷
* @param filePathAndName
* @param document
* @return boolean
* @throws IOException
*/
public static boolean writeXMLFile(String filePathAndName, Document document)
throws IOException {
boolean result = false;
XMLWriter writer = getXMLWriter(filePathAndName);
writeXMLFile(writer, document);
writer.close();
result = true;
return result;
}
/**
* 锟斤拷锟絰ml锟侥硷拷
* @param filePathAndName
* @param document
* @return boolean
* @throws IOException
*/
public static boolean writeXMLFileByFormat(String filePathAndName, Document document)
throws IOException {
boolean result = false;
OutputFormat format = OutputFormat.createPrettyPrint();
XMLWriter writer = getXMLWriter(filePathAndName, format);
writeXMLFile(writer, document);
writer.close();
result = true;
return result;
}
/**
* 锟斤拷锟絰ml锟侥硷拷
* @param xmlWriter
* @param document
* @return boolean
* @throws IOException
*/
private static boolean writeXMLFile(XMLWriter xmlWriter, Document document)
throws IOException {
boolean result = false;
xmlWriter.write(document);
xmlWriter.flush();
xmlWriter.close();
result = true;
return result;
}
/**
* 锟斤拷取xml,锟斤拷锟斤拷Document
* @param filename
* @return Document
* @throws DocumentException
*/
public static Document readXMLFile(String filename) throws DocumentException {
Document document = null;
if (filename == null || filename == "") {
return document;
}
SAXReader saxReader = new SAXReader();
document = saxReader.read(new File(filename));
return document;
}
/**
* 锟斤拷锟斤拷XML锟侥硷拷锟斤拷式
* @return
*/
public static Document createDocument() {
Document document = DocumentHelper.createDocument();
Element booksElement = document.addElement("books");
booksElement.addComment("This is a test for dom4j, holen, 2004.9.11");
Element bookElement = booksElement.addElement("book");
bookElement.addAttribute("show", "yes");
Element titleElement = bookElement.addElement("id");
titleElement.setText("1");
titleElement = bookElement.addElement("title");
titleElement.setText("Dom4j Tutorials");
titleElement = bookElement.addElement("author");
titleElement.setText("panming");
titleElement = bookElement.addElement("date");
titleElement.setText("2008-3-31");
bookElement = booksElement.addElement("book");
bookElement.addAttribute("show", "yes");
titleElement = bookElement.addElement("id");
titleElement.setText("2");
titleElement = bookElement.addElement("title");
titleElement.setText("Lucene Studing");
titleElement = bookElement.addElement("author");
titleElement.setText("panming");
titleElement = bookElement.addElement("date");
titleElement.setText("2008-3-31");
bookElement = booksElement.addElement("book");
bookElement.addAttribute("show", "no");
titleElement = bookElement.addElement("id");
titleElement.setText("3");
titleElement = bookElement.addElement("title");
titleElement.setText("Lucene in Action");
titleElement = bookElement.addElement("author");
titleElement.setText("panming");
titleElement = bookElement.addElement("date");
titleElement.setText("2008-3-31");
Element ownerElement = booksElement.addElement("owner");
ownerElement.setText("O'Reilly");
return document;
}
public static String nodeText(Element element){
if(element.isTextOnly()){
System.out.println(element.getName()+":"+element.getText());
}else{
for(Iterator<?> iterator = element.elementIterator();iterator.hasNext();){
Element element1 = (Element)iterator.next();
nodeText(element1);
}
}
return null;
}
/**
*
* @param list 锟斤拷菘锟斤拷取锟斤拷锟斤拷锟侥硷拷录锟斤拷
* @param filePath 锟斤拷锟斤拷xml锟斤拷锟侥硷拷锟斤拷路锟斤拷
* @param fileName 锟斤拷锟斤拷锟絰ml锟侥硷拷锟斤拷
* @return 锟斤拷锟斤拷xml锟斤拷路锟斤拷锟斤拷
*/
public static boolean dataToXml(List<?> list, String filePath, String fileName)
throws DocumentException, IOException {
boolean status = false;
XStream xstream = new XStream();
String xml = xstream.toXML(list);
Document document = DocumentHelper.parseText(xml);
if (!IOUtil.FileExists(filePath)) {
IOUtil.newFile(filePath);
}
status = Dom4jUtil.writeXMLFileByFormat(fileName, document);
return status;
}
/**
*
* @param list 锟斤拷菘锟斤拷取锟斤拷锟斤拷锟侥硷拷录锟斤拷
* @param filePath 锟斤拷锟斤拷xml锟斤拷锟侥硷拷锟斤拷路锟斤拷
* @param fileName 锟斤拷锟斤拷锟絰ml锟侥硷拷锟斤拷
* @param clazz 要转锟斤拷为xml锟斤拷锟斤拷
* @param alias 转锟斤拷为xml锟斤拷谋锟斤拷锟� * @return 锟斤拷锟斤拷xml锟斤拷路锟斤拷锟斤拷
*/
public static boolean dataToXml(List<?> list, String filePath,
String fileName, Class<?> clazz, String alias)
throws DocumentException, IOException {
boolean status = false;
XStream xstream = new XStream();
xstream.alias(alias + "s", List.class);
xstream.alias(alias, clazz);
String xml = xstream.toXML(list);
Document document = DocumentHelper.parseText(xml);
if (!IOUtil.FileExists(filePath)) {
IOUtil.newFile(filePath);
}
status = Dom4jUtil.writeXMLFileByFormat(fileName, document);
return status;
}
public static String dataToXmls(List<?> list, Class<?> clazz, String alias) {
XStream xstream = new XStream();
xstream.alias(alias + "s", List.class);
xstream.alias(alias, clazz);
String xml = xstream.toXML(list);
// Document document = DocumentHelper.parseText(xml);
// document.asXML(); document锟侥硷拷转锟斤拷为xml
// if (!IOUtil.FileExists(filePath)) {
// IOUtil.newFile(filePath);
// }
// status = Dom4jUtil.writeXMLFileByFormat(fileName, document);
return xml;
}
public static String objectToXmls(Object object, Class<?> clazz, String alias) {
XStream xstream = new XStream();
xstream.alias(alias, clazz);
String xml = xstream.toXML(object);
return xml;
}
/**
*
* @param receiveXml 要转锟斤拷锟斤拷xml源锟侥硷拷
* @return 锟斤拷锟斤拷锟斤拷锟叫憋拷
*/
public static List<?> xmlToData(String receiveXml) {
XStream xstream = new XStream(new DomDriver());
List<?> list = (List<?>) xstream.fromXML(receiveXml);
return list;
}
/**
*
* @param receiveXml 要转锟斤拷锟斤拷xml源锟侥硷拷
* @param alias 转锟斤拷为xml锟斤拷谋锟斤拷锟� * @param clazz xml转锟斤拷锟斤拷锟斤拷锟斤拷锟� * @return 锟斤拷锟斤拷锟斤拷锟叫憋拷
*/
public static List<?> xmlToData(String receiveXml, Class<?> clazz, String alias) {
XStream xstream = new XStream(new DomDriver());
xstream.alias(alias + "s", List.class);
xstream.alias(alias, clazz);
List<?> list = (List<?>) xstream.fromXML(receiveXml);
return list;
}
public static Object xmlToObject(String receiveXml, Class<?> clazz, String alias) {
XStream xstream = new XStream(new DomDriver());
xstream.alias(alias, clazz);
Object object = (Object) xstream.fromXML(receiveXml);
return object;
}
/**
* @param xmlPath
* @param xsdPath
* @return
*/
public static boolean validateXMLByXS(String xmlPath, String xsdPath) {
String xmlFileName = xmlPath;
String xsdFileName = xsdPath;
try {
XMLErrorHandler errorHandler = new XMLErrorHandler();
SAXParserFactory factory = SAXParserFactory.newInstance();
factory.setValidating(true);
factory.setNamespaceAware(true);
SAXParser parser = factory.newSAXParser();
SAXReader xmlReader = new SAXReader();
Document xmlDocument = (Document) xmlReader.read(new File(
xmlFileName));
parser.setProperty(
"http://java.sun.com/xml/jaxp/properties/schemaLanguage",
"http://www.w3.org/2001/XMLSchema");
parser.setProperty(
"http://java.sun.com/xml/jaxp/properties/schemaSource",
"file:" + xsdFileName);
SAXValidator validator = new SAXValidator(parser.getXMLReader());
validator.setErrorHandler(errorHandler);
validator.validate(xmlDocument);
XMLWriter writer = new XMLWriter(OutputFormat.createPrettyPrint());
if (errorHandler.getErrors().hasContent()) {
writer.write(errorHandler.getErrors());
return false;
} else {
return true;
}
} catch (SAXNotRecognizedException e) {
e.printStackTrace();
} catch (SAXNotSupportedException e) {
e.printStackTrace();
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
} catch (ParserConfigurationException e) {
e.printStackTrace();
} catch (SAXException e) {
e.printStackTrace();
} catch (DocumentException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return false;
}
public static void base64Decode(String base64code, String filePath,
String fileNameh) {
sun.misc.BASE64Decoder decoder = new sun.misc.BASE64Decoder();
InputStream stream = null;
DataOutputStream out = null;
try {
stream = new ByteArrayInputStream(decoder.decodeBuffer(base64code));
File outputfile = new File(filePath, fileNameh);
out = new DataOutputStream(new FileOutputStream(outputfile));
byte[] buffer = new byte[65535];
while (stream.read(buffer) > 0) {
out.write(buffer);
}
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} finally {
if (stream != null) {
try {
stream.close();
} catch (IOException e) {
e.printStackTrace();
}
}
if (out != null) {
try {
out.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
}
package xls.util;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.StringTokenizer;
/***
* @author panming
* @since 2010-04-01
*/
public class IOUtil {
public static File newFile(String filename) throws IOException {
if (filename == null || filename.equals("")) {
return null;
} else {
filename = StringUtil.formatPath(filename);
File file = new File(filename);
if (!file.exists()) {
file.mkdirs();
}
return file;
}
}
public static boolean FileExists(String filename) throws IOException {
if (filename == null || filename.equals("")) {
return false;
} else {
filename = StringUtil.formatPath(filename);
File file = new File(filename);
return file.exists();
}
}
public static boolean renameFile(String filename, String filename1)
throws IOException {
boolean _bln = false;
if ((filename == null || filename.equals(""))
|| ((filename1 == null || filename1.equals("")))) {
return false;
} else {
filename = StringUtil.formatPath(filename);
filename1 = StringUtil.formatPath(filename1);
File _file = new File(filename);
File _file1 = new File(filename1);
if (_file.exists()) {
_bln = _file.renameTo(_file1);
}
return _bln;
}
}
public static boolean deleteFile(String filename) throws IOException {
if (filename == null || filename.equals("")) {
return false;
} else {
filename = StringUtil.formatPath(filename);
File _file = new File(filename);
if (_file.exists()) {
_file.delete();
}
return true;
}
}
public static void deleteAllFile(String filePath) throws IOException {
if (filePath != null && !filePath.equals("")) {
File file = new File(filePath);
if (file.exists()) {
File[] fileList = file.listFiles();
String dirPath = null;
if (fileList != null)
for (int i = 0; i < fileList.length; i++) {
if (fileList[i].isFile())
fileList[i].delete();
if (fileList[i].isDirectory()) {
dirPath = fileList[i].getPath();
deleteAllFile(dirPath);
}
}
file.delete();
}
}
}
public static synchronized String readFile(String fileName)
throws IOException {
String fileContent = "";
if (StringUtil.checkString(fileName)) {
File file = new File(fileName);
if (file.exists()) {
FileInputStream htmlinputstream = new FileInputStream(fileName);
int ContentByte = htmlinputstream.available();
byte htmlByte[] = new byte[ContentByte];
htmlinputstream.read(htmlByte);
htmlinputstream.close();
fileContent = new String(htmlByte);
}
}
return fileContent;
}
/***
* 读取文本文件内容
*
* @param filePathAndName
* 带有完整绝对路径的文件名
* @param encoding
* 文本文件打开的编码方式
* @return 返回文本文件的内容
*/
public static synchronized String readFile(String fileName, String encoding)
throws IOException {
encoding = encoding.trim();
StringBuffer str = new StringBuffer("");
String st = null;
FileInputStream fs = new FileInputStream(fileName);
InputStreamReader isr;
if (encoding != null && encoding.equals("")) {
isr = new InputStreamReader(fs);
} else {
isr = new InputStreamReader(fs, encoding);
}
String data = null;
BufferedReader br = new BufferedReader(isr);
while ((data = br.readLine()) != null) {
str.append(data + " ");
}
st = str.toString();
return st;
}
// 保存修改内容
public static synchronized void saveFile(String outputContent,
String fileName) throws IOException {
if (StringUtil.checkString(outputContent)
&& StringUtil.checkString(fileName)) {
File file = new File(fileName);
// if (file.exists()) {
// file.delete();
// }
FileOutputStream fileoutputstream = new FileOutputStream(file);
byte htmlByte[] = outputContent.getBytes();
fileoutputstream.write(htmlByte);
fileoutputstream.close();
}
}
/***
* 复制单个文件
*
* @param oldPathFile
* 准备复制的文件源
* @param newPathFile
* 拷贝到新绝对路径带文件名
*/
public static void copyFile(String oldPathFile, String newPathFile)
throws IOException {
int bytesum = 0;
int byteread = 0;
File oldfile = new File(oldPathFile);
if (oldfile.exists()) { // 文件存在时
InputStream inStream = new FileInputStream(oldPathFile); // 读入原文件
int ContentByte = inStream.available();
FileOutputStream fs = new FileOutputStream(newPathFile);
byte[] buffer = new byte[ContentByte];
while ((byteread = inStream.read(buffer)) != -1) {
bytesum += byteread; // 字节数 文件大小
fs.write(buffer, 0, byteread);
}
inStream.close();
}
}
/***
* 新建目录
*
* @param folderPath
* 目录
*/
public static void createFolder(String folderPath) throws IOException {
File myFilePath = new File(folderPath);
if (!myFilePath.exists()) {
myFilePath.mkdir();
}
}
/***
* 多级目录创建
*
* @param folderPath
* 准备要在本级目录下创建新目录的目录路径 例如 c:myf
* @param paths
* 无限级目录参数，各级目录以单数线区分 例如 a|b|c
*/
public static void createFolders(String folderPath, String paths)
throws IOException {
String txt;
StringTokenizer st = new StringTokenizer(paths, "|");
for (int i = 0; st.hasMoreTokens(); i++) {
txt = st.nextToken().trim();
if (folderPath.lastIndexOf(File.separator) != -1) {
createFolder(folderPath + txt);
} else {
createFolder(folderPath + txt + File.separator);
}
}
}
public static void createNewFile(String directory, String filename)
throws IOException {
if (directory != null && !directory.equals("") && filename != null
&& filename.equals("")) {
File file = new File(directory, filename);
if (!file.exists()) {
file.getParentFile().mkdirs();
file.createNewFile();
}
}
}
public static void main(String[] args) {
try {
System.out.println(IOUtil.FileExists("c://log.txt"));
} catch (IOException e) {
e.printStackTrace();
}
}
}
package xls.util;
import java.io.File;
import java.io.UnsupportedEncodingException;
import java.util.StringTokenizer;
/***
* @author panming
*/
public class StringUtil {
// 检查字符窜是否为空,假如为空的话就返回false,否则返回true
public static boolean checkString(String str) {
boolean isnull = false;
if (str == null || str.equals("") || str.equals("null")
|| str.equals("NULL")) {
isnull = false;
} else {
isnull = true;
}
return isnull;
}
// 校验字符窜是否为空,假如不为空就返回true
public static boolean validateStrNotNull(String str) {
boolean _isNull = false;
if (str == null || str.equals("") || str.equals("null")
|| str.equals("NULL")) {
_isNull = false;
} else {
_isNull = true;
}
return _isNull;
}
// 获取文件的扩展名
public static String getFileExt(String fileName) {
String fileExt = null;
if (fileName == null || fileName.equals("")) {
fileExt = "";
return fileExt;
} else {
if (fileName.lastIndexOf(".") > 0) {
fileExt = fileName.substring(fileName.lastIndexOf(".") + 1);
if (fileExt == null || fileExt.equals("")) {
fileExt = "";
return fileExt;
} else {
return fileExt;
}
} else {
fileExt = "";
return fileExt;
}
}
}
// 获取除开扩展名后的其他字符窜
public static String getFileWithoutExt(String fileName) {
String fileWithoutExt = null;
if (fileName == null || fileName.equals("")) {
fileWithoutExt = "";
return fileWithoutExt;
} else {
if (fileName.lastIndexOf(".") > 0) {
fileWithoutExt = fileName.substring(0, fileName
.lastIndexOf("."));
if (fileWithoutExt == null || fileWithoutExt.equals("")) {
fileWithoutExt = "";
return fileWithoutExt;
} else {
return fileWithoutExt;
}
} else {
fileWithoutExt = "";
return fileWithoutExt;
}
}
}
// 判断在指定的字符窜中是否存在着特定的字符窜
public static boolean getStrExists(String fileName, String str) {
boolean isExist = false;
if ((fileName == null || fileName.equals(""))
|| (str == null || str.equals(""))) {
return isExist;
} else {
int i = fileName.indexOf(str);
if (i >= 0) {
isExist = true;
} else {
isExist = false;
}
return isExist;
}
}
// 标准格式化路径
public static String formatPath(String path) {
if (path == null || path.equals("")) {
path = "";
return path;
} else {
path = replaceAll(path, "\\", File.separator);
path = replaceAll(path, "/", File.separator);
return path;
}
}
public static String formatHtml(String strHtml) {
if (strHtml == null || strHtml.equals("")) {
strHtml = "";
} else {
strHtml = replaceAll(strHtml, "\"", "'");
}
return strHtml;
}
// 字符窜替换函数
public static String replaceAll(String s, String s1, String s2) {
StringBuffer stringbuffer = new StringBuffer();
String str_stringbuffer = null;
int i = 0;
int j = 0;
int k = 0;
int l = 0;
if ((s == null || s.equals("")) || (s1 == null || s1.equals(""))) {
if (s == null) {
s = "";
}
return s;
} else {
i = s.length();
j = s1.length();
for (k = 0; (l = s.indexOf(s1, k)) >= 0; k = l + j) {
stringbuffer.append(s.substring(k, l));
stringbuffer.append(s2);
}
if (k < i)
stringbuffer.append(s.substring(k));
str_stringbuffer = stringbuffer.toString();
stringbuffer = new StringBuffer();
return str_stringbuffer;
}
}
// 字符窜根据特定的标记来返回数组
public static String[] strToArray(String dataStr, String tokenizer) {
String[] arr = null;
StringTokenizer st = new StringTokenizer(dataStr, tokenizer);
arr = new String[st.countTokens()];
for (int i = 0; st.hasMoreTokens() && i < arr.length; i++) {
arr[i] = st.nextToken();
}
return arr;
}
// 格式化成UTF-8编码
public static String formatStrUTF8(String str) {
if (str == null || str.equals("")) {
return "";
}
try {
return (new String(str.getBytes("ISO-8859-1"), "UTF-8"));
} catch (UnsupportedEncodingException unsupportedencodingexception) {
return "";
}
}
// 格式化成gb2312编码
public static String formatStrGB2312(String str) {
if (str == null || str.equals("")) {
return "";
}
try {
return (new String(str.getBytes("ISO-8859-1"), "GB2312"));
} catch (UnsupportedEncodingException unsupportedencodingexception) {
return "";
}
}
// 判断在字符中是否包含特定的字符
public static boolean validateValueInstr(String value, String str) {
boolean isTrue = false;
if (value == null || str == null) {
return false;
} else {
String[] arr = null;
arr = StringUtil.strToArray(str, ",");
for (int i = 0; i < arr.length; i++) {
if (value.equals(arr[i])) {
isTrue = true;
}
}
}
return isTrue;
}
// 返回特定的分隔符号所分割的数据
public static String subLastStringWithTokenizer(String s, String s1,
boolean _bln) {
String _s = null;
String[] arr = null;
if ((s == null || s.equals("")) || (s1 == null || s1.equals(""))) {
_s = "";
} else {
arr = strToArray(s, s1);
if (_bln) {
_s = arr[0];
} else {
_s = arr[arr.length - 1];
}
}
return _s;
}
// 将输入的系统字符替换成等价的html字符
public static String textFormatHtml(String str) {
if (str != null && !str.equals("")) {
str = str.replaceAll("&", "&");
str = str.replaceAll("<", "<");
str = str.replaceAll(" ", " ");
str = str.replaceAll(">", ">");
str = str.replaceAll("\r\n", "<br>");
}
return str;
}
// 将html字符替换成等价的系统字符
public static String htmlFormatText(String str) {
if (str != null && !str.equals("")) {
str = str.replaceAll("&", "&");
str = str.replaceAll("<", "<");
str = str.replaceAll(" ", " ");
str = str.replaceAll(">", ">");
str = str.replaceAll("<br>", "\r\n");
}
return str;
}
public static String[] split(String list, String seperators) {
return split(list, seperators, false);
}
/***
* 第一个参数，传入的是要截的中英文字符串，第二个参数，要截取的长度。
*
* @param str
* @param subBytes
* @return str
*/
public static String subString(String str, int subBytes) {
int bytes = 0; // 用来存储字符串的总字节数
for (int i = 0; i < str.length(); i++) {
if (bytes == subBytes) {
return str.substring(0, i);
}
char c = str.charAt(i);
if (c < 256) {
bytes += 1; // 英文字符的字节数看作1
} else {
bytes += 2; // 中文字符的字节数看作2
if (bytes - subBytes == 1) {
return str.substring(0, i);
}
}
}
return str;
}
/***
* 第一个参数，传入的是要截的中英文字符串，第二个参数，要截取的长度。
*
* @param str
* @param subBytes
* @return str
*/
public static String subString2(String str, int subBytes) {
int bytes = 0; // 存储字符串的总字节数
if (str.getBytes().length <= subBytes)
return str;
for (int i = 0; i < str.length(); i++) {
String s = str.charAt(i) + "";
int bytenumber = s.getBytes().length;
if (bytenumber == 2)
bytes += 2;
else
bytes += 1;
if (bytes >= subBytes)
return str.substring(0, i);
}
return str;
}
public static String[] split(String list, String seperators, boolean include) {
StringTokenizer tokens = new StringTokenizer(list, seperators, include);
String[] result = new String[tokens.countTokens()];
int i = 0;
while (tokens.hasMoreTokens()) {
result[i++] = tokens.nextToken();
}
return result;
}
public static String getFileNameByLastIndex(String url, String separator) {
int lastIndex = url.lastIndexOf(separator);
if (lastIndex == -1) {
return null;
}
return url.substring(lastIndex + 1, url.length());
}
}
以上是对xml的解析的工具类[size=large][/size][align=center][/align]
接一下来讲一下数据库的工具类的设计
/**
*
*/
package xls.util;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import javax.naming.Context;
import javax.naming.InitialContext;
import javax.naming.NamingException;
import javax.sql.DataSource;
/**
* @author zouqh
*TODO
*上午09:08:36
*/
public class ConnectionFactory {
/**
* default datasource jndi name
*/
public final static String DEFAULT_DATASOURCE_JNDI="dsWangll"; //^_^ my honey
public final static String TYPE_DRIVER_MANAGER = "DriverManager";
public final static String TYPE_DATA_SOURCE = "DataSource";
public final static int CONN_DATESOURCE = 1;
public final static int CONN_DATESOURCE_LOGIN = CONN_DATESOURCE+1;
public final static int CONN_DRIVERMANAGER = CONN_DATESOURCE_LOGIN+1;
public final static int CONN_DRIVERMANAGER_LOGIN = CONN_DRIVERMANAGER+1;
public final static int CONN_DEFAULT = CONN_DRIVERMANAGER_LOGIN+1;
/** ConnectionFactory private constructor*/
private ConnectionFactory(){}
public static Connection getConnection(String url)
throws SQLException
{
if(url==null || url.trim().length()==0)
{
throw new SQLException("Database connection string must not be null .");
}
return DriverManager.getConnection(url);
}
public static Connection getConnection(String url,String user,String pwd)
throws SQLException
{
if(url==null || url.trim().length()==0)
{
throw new SQLException("Database connection string must not be null .");
}
System.out.println("url"+url+" "+user+"mima"+pwd);
return DriverManager.getConnection(url,user,pwd);
}
public static Connection getConnectionByJDNI(String name)
throws SQLException
{
if(name==null || name.length()==0)
{
throw new SQLException("DataSource JNDI name must not be null .");
}
DataSource ds =null;
try
{
InitialContext ctx=InitialCtxFactory.getInitialContext();
ds = (DataSource)ctx.lookup(name);
}
catch(Exception ex)
{
throw new SQLException(ex.toString());
}
return ds.getConnection();
}
public static Connection getConnectionByJDNI(String name,String user,String pwd)
throws SQLException
{
if(name==null || name.length()==0)
{
throw new SQLException("DataSource JNDI name must not be null .");
}
DataSource ds =null;
try
{
Context ctx= InitialCtxFactory.getInitialContext();
ds = (DataSource)ctx.lookup(name);
}
catch(Exception ex)
{
throw new SQLException(ex.toString());
}
return ds.getConnection(user,pwd);
}
}
class InitialCtxFactory
{
private static InitialContext initialCtx = null;
public static synchronized InitialContext getInitialContext()
throws NamingException
{
if(initialCtx!=null)
{
return initialCtx;
}
else
{
initialCtx = new InitialContext();
return initialCtx;
}
}
/**
*
*/
package xls.util;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.SQLException;
import java.sql.Statement;
/**
* @author zouqh
*TODO
*上午09:05:57
*/
public class ConnUtils {
public static Connection getConnection(StoreConfig storeConfig)
throws SQLException
{
int cMethod=getConnectionMethod(storeConfig);
String cString=storeConfig.getURL();
String cUserName=storeConfig.getUserName();
String cPassword=storeConfig.getPassword();
String cDriver=storeConfig.getDriverClass();
if(cDriver!=null)
{
try
{
Class.forName(cDriver);
}
catch(Exception ex0)
{
throw new SQLException("["+ConnUtils.class.getName()+"] Can not load the database jdbc driver."+cDriver+"");
}
}
switch(cMethod)
{
case ConnectionFactory.CONN_DATESOURCE :
return ConnectionFactory.getConnectionByJDNI(cString);
case ConnectionFactory.CONN_DATESOURCE_LOGIN :
return ConnectionFactory.getConnectionByJDNI(cString,cUserName,cPassword);
case ConnectionFactory.CONN_DRIVERMANAGER :
return ConnectionFactory.getConnection(cString);
case ConnectionFactory.CONN_DRIVERMANAGER_LOGIN :
return ConnectionFactory.getConnection(cString,cUserName,cPassword);
default:
return ConnectionFactory.getConnectionByJDNI(ConnectionFactory.DEFAULT_DATASOURCE_JNDI);
}
}
//--------------------------------------------------------------------------
// 释放数据库连接 zosatapo 2003-10-17 13:11
//--------------------------------------------------------------------------
public static void cleanupNoThrow(Statement stmt)
{
if(stmt!=null)
{
try{stmt.close();}catch(SQLException ex){}
}
}
public static void cleanupNoThrow(PreparedStatement pstmt)
{
if(pstmt!=null)
{
try{pstmt.close();}catch(SQLException ex){}
}
}
public static void cleanupNoThrow(Connection conn)
{
if(conn!=null)
{
try{conn.close();}catch(SQLException ex){}
}
}
public static void cleanupNoThrow(Connection conn,Statement stmt)
{
if(stmt!=null)
{
try{stmt.close();}catch(SQLException ex){}
}
if(conn!=null)
{
try{conn.close();}catch(SQLException ex){}
}
}
public static void cleanupNoThrow(Connection conn,PreparedStatement pstmt)
{
if(pstmt!=null)
{
try{pstmt.close();}catch(SQLException ex){}
}
if(conn!=null)
{
try{conn.close();}catch(SQLException ex){}
}
}
public static void cleanupThrow(Statement stmt)
throws SQLException
{
if(stmt!=null){stmt.close();}
}
public static void cleanupThrow(PreparedStatement pstmt)
throws SQLException
{
if(pstmt!=null){pstmt.close();}
}
public static void cleanupThrow(Connection conn)
throws SQLException
{
if(conn!=null){conn.close(); }
}
public static void cleanupThrow(Connection conn,Statement stmt)
throws SQLException
{
if(stmt!=null){stmt.close();}
if(conn!=null){conn.close(); }
}
public static void cleanupThrow(Connection conn,PreparedStatement pstmt)
throws SQLException
{
if(pstmt!=null){pstmt.close();}
if(conn!=null){conn.close(); }
}
private static int getConnectionMethod(StoreConfig storeConfig)
{
if(storeConfig==null)
{
return ConnectionFactory.CONN_DEFAULT;
}
String connType=storeConfig.getType();
String connString=storeConfig.getURL();
String connUserName=storeConfig.getUserName();
String connPassword=storeConfig.getPassword();
int result=ConnectionFactory.CONN_DEFAULT;
String dataSource=ConnectionFactory.TYPE_DATA_SOURCE;
String ddriverManager=ConnectionFactory.TYPE_DRIVER_MANAGER;
if(dataSource.equalsIgnoreCase(connType))
{
if(connString==null)
{
result=ConnectionFactory.CONN_DEFAULT;
}
else
{
if(connUserName==null || connPassword==null)
{
result=ConnectionFactory.CONN_DATESOURCE;
}
else
{
result=ConnectionFactory.CONN_DATESOURCE_LOGIN;
}//end if(connUserName==null || connPassword==null)
}//~end if(connString==null)
}
else if(ddriverManager.equalsIgnoreCase(connType))
{
if(connUserName==null || connPassword==null)
{
result=ConnectionFactory.CONN_DRIVERMANAGER;
}
else
{
result=ConnectionFactory.CONN_DRIVERMANAGER_LOGIN;
}//end if(connUserName==null || connPassword==null)
}
else
{
result=ConnectionFactory.CONN_DEFAULT;
}
return result;
}
}
package xls.util;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.TimeZone;
import org.apache.poi.hssf.usermodel.HSSFDateUtil;
public class DateUtils {
public static String toString(java.util.Date date) {
DateFormat formatter = new SimpleDateFormat("yyyy-MM-dd");
formatter.setTimeZone(TimeZone.getDefault());
return formatter.format(date);
}
public static String toString(java.sql.Date date) {
// yyyy-mm-dd
return date.toString();
}
public static String toString(java.sql.Time date) {
// hh:mm:ss
return date.toString();
}
public static String toString(java.sql.Timestamp date) {
// yyyy-mm-dd hh:mm:ss
String dateString = date.toString();
int posIndex = dateString.lastIndexOf(".");
return dateString.substring(0, posIndex);
}
// -----------------------------------------------------------------
// -----------------------------------------------------------------
public static java.sql.Date toDate(double xlsDate) {
// System.err.println("[DateUtils#toDate]"+dateString);
java.util.Date javaDate = HSSFDateUtil.getJavaDate(xlsDate);
java.sql.Date sqlDate = new java.sql.Date(javaDate.getTime());
return sqlDate;
}
@SuppressWarnings("deprecation")
public static java.sql.Date toDate(String dateString) {
dateString = dateString.trim();
java.sql.Date resultDate = null;
try {
// try yyyy-mm-dd --> Date
resultDate = java.sql.Date.valueOf(dateString);
} catch (IllegalArgumentException ex) {
try {
// try yyyy/mm/dd --> Date
int year;
int month;
int day;
int firstDash;
int secondDash;
firstDash = dateString.indexOf('/');
secondDash = dateString.indexOf('/', firstDash + 1);
if ((firstDash > 0) & (secondDash > 0)
& (secondDash < dateString.length() - 1)) {
year = Integer.parseInt(dateString.substring(0, firstDash)) - 1900;
month = Integer.parseInt(dateString.substring(
firstDash + 1, secondDash)) - 1;
day = Integer
.parseInt(dateString.substring(secondDash + 1));
} else {
throw new java.lang.IllegalArgumentException();
}
resultDate = new java.sql.Date(year, month, day);
} catch (IllegalArgumentException ex0) {
// try yyyymmdd --> Date
int year;
int month;
int day;
year = Integer.parseInt(dateString.substring(0, 4)) - 1900;
month = Integer.parseInt(dateString.substring(4, 6)) - 1;
day = Integer.parseInt(dateString.substring(6, 8));
resultDate = new java.sql.Date(year, month, day);
}
}
return resultDate;
}
public static java.sql.Time toTime(String dateString) {
java.sql.Time resultDate = java.sql.Time.valueOf(dateString.trim());
return resultDate;
}
public static java.sql.Timestamp toTimestamp(String dateString) {
java.sql.Timestamp resultDate = java.sql.Timestamp.valueOf(dateString
.trim());
return resultDate;
}
public static java.sql.Date toDate(java.sql.Timestamp ts) {
return new java.sql.Date(ts.getTime());
}
public static java.sql.Time toTime(java.sql.Timestamp ts) {
return new java.sql.Time(ts.getTime());
}
}
package xls.util;
import java.sql.Date;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Time;
import java.sql.Timestamp;
import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFCellStyle;
import org.apache.poi.hssf.usermodel.HSSFDataFormat;
import org.apache.poi.hssf.usermodel.HSSFDateUtil;
import org.apache.poi.hssf.usermodel.HSSFRow;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import xls.core.Cell;
import xls.core.Column;
import xls.core.CoreException;
import xls.core.Schema;
import xls.core.Type;
public class IoUtils {
/**
* XLS Type<--------->Standard Type
*
* public final static Type VARCHAR = new Type("VARCHAR");//字符串保存 public
* final static Type INTEGER = new Type("INTEGER");//字符串保存 public final
* static Type FLOAT = new Type("FLOAT");//字符串保存 public final static Type
* DATE = new Type("DATE"); public final static Type TIME = new
* Type("TIME"); public final static Type TIMESTAMP = new Type("TIMESTAMP");
*
* @see Type
*/
public static Object formatXlsValue(Object value, Type dstType) {
if (value == null) {
// System.err.println("[formatXlsValue] "+dstType+",value=null");
return value;
}
// System.err.println("[formatXlsValue] "+dstType+",value.class="+value.getClass().getName());
if (Type.VARCHAR.equals(dstType) || Type.INTEGER.equals(dstType)
|| Type.FLOAT.equals(dstType)) {
return value;
} else if (Type.DATE.equals(dstType)) {
java.util.Date javaDate = HSSFDateUtil.getJavaDate(Float
.parseFloat(value.toString()));
return DateUtils.toDate(DateUtils.toString(javaDate));
} else if (Type.TIME.equals(dstType)) {
java.util.Date javaDate = HSSFDateUtil.getJavaDate(Float
.parseFloat(value.toString()));
return new java.sql.Time(javaDate.getTime());
} else if (Type.TIMESTAMP.equals(dstType)) {
java.util.Date javaDate = HSSFDateUtil.getJavaDate(Float
.parseFloat(value.toString()));
return new java.sql.Timestamp(javaDate.getTime());
}
return value;
}
public static Object readCell(HSSFCell cell, Type srcType, Type dstType) {
cell.setEncoding(HSSFCell.ENCODING_UTF_16);
int type = TypeUtils.column2Xls(srcType);
Object value = null;
try {
switch (type) {
case HSSFCell.CELL_TYPE_STRING:
value = cell.getStringCellValue();
break;
case HSSFCell.CELL_TYPE_NUMERIC:
if (Type.DATE.equals(dstType) || Type.DATE.equals(dstType)
|| Type.DATE.equals(dstType)) {
value = String.valueOf(DateUtils.toDate(
cell.getNumericCellValue()).getTime());
} else {
value = String.valueOf(cell.getNumericCellValue());
}
break;
default:
break;
}
} catch (NumberFormatException ex) {
// 1.试着解析数据来源本身的类型设置
type = cell.getCellType();
// 2.试着修改schema提供的类型设置
// srcType = srcType.copy();
srcType.reset(TypeUtils.xls2Column(type));
switch (type) {
case HSSFCell.CELL_TYPE_ERROR:
value = String.valueOf(cell.getErrorCellValue());
break;
case HSSFCell.CELL_TYPE_NUMERIC:
if (Type.DATE.equals(dstType) || Type.TIME.equals(dstType)
|| Type.TIMESTAMP.equals(dstType)) {
value = String.valueOf(DateUtils.toDate(
cell.getNumericCellValue()).getTime());
} else {
value = String.valueOf(cell.getNumericCellValue());
}
break;
case HSSFCell.CELL_TYPE_BOOLEAN:
value = String.valueOf(cell.getBooleanCellValue() ? "1" : "0");
break;
default:
value = cell.getStringCellValue();
break;
}
}
Object xlsObject = formatXlsValue(value, srcType);
Object stdObject = formatValue(xlsObject, srcType, dstType);
return stdObject;
}
public static Object readCell(ResultSet rs, int colNum, Type srcType,
Type dstType) throws SQLException {
Object value = null;
if (Type.INTEGER.equals(srcType)) {
value = String.valueOf(rs.getInt(colNum));
}
if (Type.FLOAT.equals(srcType)) {
value = String.valueOf(rs.getFloat(colNum));
} else if (Type.DATE.equals(srcType)) {
value = rs.getDate(colNum);
} else if (Type.TIMESTAMP.equals(srcType)) {
value = rs.getTimestamp(colNum);
} else {
value = rs.getString(colNum);
}
return formatValue(value, srcType, dstType);
}
/**
* Standard Type<--------->Standard Type
*
* public final static Type VARCHAR = new Type("VARCHAR");//字符串保存 public
* final static Type INTEGER = new Type("INTEGER");//字符串保存 public final
* static Type FLOAT = new Type("FLOAT");//字符串保存 public final static Type
* DATE = new Type("DATE"); public final static Type TIME = new
* Type("TIME"); public final static Type TIMESTAMP = new Type("TIMESTAMP");
*
* @see Type
*/
public static Object formatValue(Object value, Type srcType, Type dstType) {
if (value == null) {
return value;
}
if (srcType.equals(dstType)) {
return value;
}
boolean formatted = false;
// --------------------------------------------------
if (Type.VARCHAR.equals(srcType)) // java.lang.String
{
if (Type.INTEGER.equals(dstType) || Type.FLOAT.equals(dstType)) {
return value;
} else if (Type.DATE.equals(dstType)) {
return DateUtils.toDate(value.toString());
} else if (Type.TIME.equals(dstType)) {
return DateUtils.toTime(value.toString());
} else if (Type.TIMESTAMP.equals(dstType)) {
return DateUtils.toTimestamp(value.toString());
}
}
if (Type.INTEGER.equals(srcType)) // java.lang.String
{
if (Type.VARCHAR.equals(dstType) || Type.FLOAT.equals(dstType)) {
return value;
} else if (Type.DATE.equals(dstType)) {
return DateUtils.toDate(value.toString());
} else if (Type.TIME.equals(dstType)) {
return DateUtils.toTime(value.toString());
} else if (Type.TIMESTAMP.equals(dstType)) {
return DateUtils.toTimestamp(value.toString());
}
}
if (Type.FLOAT.equals(srcType)) // java.lang.String
{
if (Type.VARCHAR.equals(dstType) || Type.INTEGER.equals(dstType)) {
return value;
} else if (Type.DATE.equals(dstType)) {
return new java.sql.Date((long) Float.parseFloat(value
.toString()));
} else if (Type.TIME.equals(dstType)) {
return new java.sql.Time((long) Float.parseFloat(value
.toString()));
} else if (Type.TIMESTAMP.equals(dstType)) {
return new java.sql.Timestamp((long) Float.parseFloat(value
.toString()));
}
}
if (Type.DATE.equals(srcType)) // java.sql.Date
{
if (Type.VARCHAR.equals(dstType)) {
return DateUtils.toString((java.sql.Date) value);
} else if (Type.INTEGER.equals(dstType)) {
java.sql.Date date = (java.sql.Date) value;
return String.valueOf(date.getTime()); // milliseconds
} else if (Type.FLOAT.equals(dstType)) {
java.sql.Date date = (java.sql.Date) value;
return String.valueOf(date.getTime()); // milliseconds
} else if (Type.TIMESTAMP.equals(dstType)) {
return DateUtils.toTimestamp(DateUtils
.toString((java.sql.Date) value) + " 00:00:00.000");
}
}
if (Type.TIME.equals(srcType)) // java.sql.Time
{
if (Type.VARCHAR.equals(dstType)) {
return DateUtils.toString((java.sql.Time) value);
} else if (Type.INTEGER.equals(dstType)) {
java.sql.Time date = (java.sql.Time) value;
return String.valueOf(date.getTime()); // milliseconds
} else if (Type.FLOAT.equals(dstType)) {
java.sql.Time date = (java.sql.Time) value;
return String.valueOf(date.getTime()); // milliseconds
}
}
if (Type.TIMESTAMP.equals(srcType)) // java.sql.Timestamp
{
if (Type.VARCHAR.equals(dstType)) {
return DateUtils.toString((java.sql.Timestamp) value);
} else if (Type.INTEGER.equals(dstType)) {
java.sql.Timestamp date = (java.sql.Timestamp) value;
return String.valueOf(date.getTime()); // milliseconds
} else if (Type.FLOAT.equals(dstType)) {
java.sql.Timestamp date = (java.sql.Timestamp) value;
return String.valueOf(date.getTime()); // milliseconds
} else if (Type.TIME.equals(dstType)) {
return DateUtils.toTime((java.sql.Timestamp) value);
} else if (Type.DATE.equals(dstType)) {
return DateUtils.toDate((java.sql.Timestamp) value);
}
}
if (!formatted) {
throw new RuntimeException("Can not foramt " + value + " from '"
+ srcType + "' to '" + dstType + "'");
}
return value;
}
public static Object formatDefaultValue(String value, Type dstType) {
Object defValue = null;
if (Type.VARCHAR.equals(dstType) || Type.INTEGER.equals(dstType)
|| Type.FLOAT.equals(dstType)) {
defValue = value;
} else if (Type.DATE.equals(dstType)) {
defValue = DateUtils.toDate(value);
} else if (Type.TIME.equals(dstType)) {
defValue = DateUtils.toTime(value);
} else if (Type.TIMESTAMP.equals(dstType)) {
defValue = DateUtils.toTimestamp(value + ".000");
;
}
return defValue;
}
public static void writeTitle(HSSFRow row, int cellIndex, String title) {
HSSFCell cell = row.createCell((short) cellIndex);
cell.setCellType(HSSFCell.CELL_TYPE_STRING);
// cell.setEncoding(HSSFCell.ENCODING_COMPRESSED_UNICODE);
// cell.setEncoding(HSSFCell.ENCODING_UTF_16);
cell.setCellValue(title);
}
public static void writeCell(HSSFWorkbook workBook, HSSFRow row,
int cellIndex, Cell cellObject) {
Schema schema = cellObject.getSchema();
Column column = schema.getColumn(cellObject.getColumnIndex());
Type dstType = column.getOutType();
Type colType = column.getType();
Object value = cellObject.getValue();
if (value == null) {
return;
}
value = IoUtils.formatValue(value, colType, dstType);
int xlsType = TypeUtils.column2Xls(dstType);
HSSFCell cell = row.createCell((short) cellIndex);
cell.setEncoding(HSSFCell.ENCODING_UTF_16);
switch (xlsType) {
case HSSFCell.CELL_TYPE_NUMERIC:
cell.setCellType(HSSFCell.CELL_TYPE_NUMERIC);
writeXlsCell(workBook, cell, value, dstType, xlsType);
break;
case HSSFCell.CELL_TYPE_FORMULA:
cell.setCellType(HSSFCell.CELL_TYPE_FORMULA);
writeXlsCell(workBook, cell, value, dstType, xlsType);
break;
case HSSFCell.CELL_TYPE_BOOLEAN:
cell.setCellType(HSSFCell.CELL_TYPE_BOOLEAN);
writeXlsCell(workBook, cell, value, dstType, xlsType);
break;
case HSSFCell.CELL_TYPE_ERROR:
cell.setCellType(HSSFCell.CELL_TYPE_ERROR);
writeXlsCell(workBook, cell, value, dstType, xlsType);
break;
default:
cell.setCellType(HSSFCell.CELL_TYPE_STRING);
writeXlsCell(workBook, cell, value, dstType, xlsType);
break;
}
}
private static void writeXlsCell(HSSFWorkbook workBook, HSSFCell cell,
Object value, Type outType, int xlsType) {
HSSFCellStyle cs = null;
boolean formatted = false;
if (Type.VARCHAR.equals(outType) || Type.INTEGER.equals(outType)
|| Type.FLOAT.equals(outType)) {
switch (xlsType) {
case HSSFCell.CELL_TYPE_NUMERIC:
cell.setCellValue(Double.parseDouble(valueOf(value, "0")));
return;
case HSSFCell.CELL_TYPE_BOOLEAN:
cell.setCellValue((Integer.parseInt(valueOf(value, "0")) == 0) ? false
: true);
return;
case HSSFCell.CELL_TYPE_STRING:
cell.setCellValue(valueOf(value, ""));
return;
}
} else if (Type.DATE.equals(outType)) {
switch (xlsType) {
case HSSFCell.CELL_TYPE_NUMERIC:
cs = workBook.createCellStyle();
cs.setDataFormat(HSSFDataFormat.getBuiltinFormat("m/d/yy"));
cell.setCellStyle(cs);
cell.setCellValue(((java.util.Date) value));
return;
case HSSFCell.CELL_TYPE_STRING:
cell.setCellValue(DateUtils.toString((Date) value));
return;
}
} else if (Type.TIME.equals(outType)) {
switch (xlsType) {
case HSSFCell.CELL_TYPE_NUMERIC:
cs = workBook.createCellStyle();
cs.setDataFormat(HSSFDataFormat.getBuiltinFormat("h:mm:ss"));
cell.setCellStyle(cs);
cell.setCellValue((java.util.Date) value);
return;
case HSSFCell.CELL_TYPE_STRING:
cell.setCellValue(DateUtils.toString((Time) value));
return;
}
} else if (Type.TIMESTAMP.equals(outType)) {
switch (xlsType) {
case HSSFCell.CELL_TYPE_NUMERIC:
cs = workBook.createCellStyle();
cs.setDataFormat(HSSFDataFormat.getBuiltinFormat("m/d/yy h:mm"));
cell.setCellStyle(cs);
cell.setCellValue(((java.util.Date) value));
return;
case HSSFCell.CELL_TYPE_STRING:
cell.setCellValue(DateUtils.toString((Timestamp) value));
return;
}
}
if (!formatted) {
throw new RuntimeException("Can not foramt " + value + " from '"
+ outType + "' to '" + xlsType + "'");
}
}
public static void writeCell(PreparedStatement pstmt, Cell cell,
int paramIndex) throws SQLException, CoreException {
Schema cellSchema = cell.getSchema();
Column column = cellSchema.getColumn(cell.getColumnIndex());
if (cellSchema.isValidating()) {
if (!cell.validate()) {
throw new CoreException("validation falied.{" + cell + "}");
}
}
Type colType = column.getType();
Type dstType = column.getOutType();
Object value = cell.getValue();
value = IoUtils.formatValue(value, colType, dstType);
if (Type.INTEGER.equals(dstType)) {
pstmt.setInt(paramIndex, Integer.parseInt(valueOf(value, "0")));
} else if (Type.FLOAT.equals(dstType)) {
pstmt.setFloat(paramIndex, Float.parseFloat(valueOf(value, "0")));
} else if (Type.DATE.equals(dstType)) {
pstmt.setDate(paramIndex, (Date) value);
} else if (Type.TIME.equals(dstType)) {
pstmt.setTime(paramIndex, (Time) value);
} else if (Type.TIMESTAMP.equals(dstType)) {
pstmt.setTimestamp(paramIndex, (Timestamp) value);
} else {
pstmt.setString(paramIndex, valueOf(value, ""));
}
}
public static String valueOf(Object obj, String defValue) {
if (obj == null || obj.toString().length() == 0) {
return defValue;
} else {
return obj.toString();
}
}
}
package xls.util;
public class StoreConfig {
public final static String TYPE_DRIVER_MANAGER = "DriverManager";
public final static String TYPE_DATA_SOURCE = "DataSource";
public final static String STORE_TYPE = "schema.connection.type";
public final static String STORE_URL = "schema.connection.url";
public final static String STORE_DRIVER = "schema.connection.driver";
public final static String STORE_USERNAME = "schema.connection.userName";
public final static String STORE_PASSWORD = "schema.connection.password";
private String strType;
private String strURL;
private String strDriverClass;
private String strUserName;
private String strPassword;
public StoreConfig() {
}
public StoreConfig(String storeType, String storeURL, String userName,
String password, String driverClass) {
if (!isAvailableType(storeType)) {
throw new IllegalArgumentException("Storetype[" + storeType
+ "] not supported.");
}
this.strType = storeType;
this.strURL = storeURL;
this.strDriverClass = driverClass;
this.strUserName = userName;
this.strPassword = password;
}
public String getType() {
return strType;
}
public void setType(String storeType) {
if (!isAvailableType(storeType)) {
throw new IllegalArgumentException("Storetype[" + storeType
+ "] not supported.");
}
this.strType = storeType;
}
public String getURL() {
return strURL;
}
public void setURL(String storeURL) {
this.strURL = storeURL;
}
public String getUserName() {
return strUserName;
}
public void setUserName(String userName) {
this.strUserName = userName;
}
public String getPassword() {
return strPassword;
}
public void setPassword(String password) {
this.strPassword = password;
}
public String getDriverClass() {
return strDriverClass;
}
public void setDriverClass(String driverClass) {
this.strDriverClass = driverClass;
}
public String toString() {
StringBuffer sb = new StringBuffer("StoreConfig[type=");
sb.append(this.strType);
sb.append(",url=");
sb.append(strURL);
sb.append(",userName=");
sb.append(strUserName);
sb.append(",driverClass=");
sb.append(strDriverClass);
sb.append("]");
return (sb.toString());
}
private boolean isAvailableType(String type) {
if (TYPE_DRIVER_MANAGER.equals(type) || TYPE_DATA_SOURCE.equals(type)) {
return true;
}
return false;
}
}
package xls.util;
import java.io.Serializable;
import java.util.HashMap;
import java.util.Map;
import org.apache.poi.hssf.usermodel.HSSFCell;
import xls.core.Type;
public class TypeUtils {
// Column to JAVA and EXCEL
private static final Map<String, ColumnTypeMapper> colWrappers = new HashMap<String, ColumnTypeMapper>();
// JAVA to Column
private static final Map<Class<?>, Type> java2Columns = new HashMap<Class<?>, Type>();
// Excel to Column
private static final Map<Serializable, Type> xls2Columns = new HashMap<Serializable, Type>();
private static synchronized void populateWrappers() {
colWrappers.put(Type.VARCHAR.tag(), new ColumnTypeMapper(Type.VARCHAR,
java.lang.String.class, HSSFCell.CELL_TYPE_STRING));
colWrappers.put(Type.INTEGER.tag(), new ColumnTypeMapper(Type.INTEGER,
java.lang.String.class, HSSFCell.CELL_TYPE_NUMERIC));
colWrappers.put(Type.FLOAT.tag(), new ColumnTypeMapper(Type.FLOAT,
java.lang.String.class, HSSFCell.CELL_TYPE_NUMERIC));
colWrappers.put(Type.DATE.tag(), new ColumnTypeMapper(Type.DATE,
java.sql.Date.class, HSSFCell.CELL_TYPE_NUMERIC));
colWrappers.put(Type.TIME.tag(), new ColumnTypeMapper(Type.TIME,
java.sql.Time.class, HSSFCell.CELL_TYPE_NUMERIC));
colWrappers.put(Type.TIMESTAMP.tag(), new ColumnTypeMapper(
Type.TIMESTAMP, java.sql.Timestamp.class,
HSSFCell.CELL_TYPE_NUMERIC));
// =======================================================================
java2Columns.put(java.lang.String.class, Type.VARCHAR);
java2Columns.put(Character.TYPE, Type.VARCHAR);
// java2Columns.put(Byte.TYPE,Type.INTEGER);
// java2Columns.put(TYPE,Type.INTEGER);
java2Columns.put(Integer.TYPE, Type.INTEGER);
// java2Columns.put(Long.TYPE,Type.INTEGER);
java2Columns.put(Float.TYPE, Type.FLOAT);
// java2Columns.put(Double.TYPE,Type.FLOAT);
java2Columns.put(java.sql.Date.class, Type.DATE);
java2Columns.put(java.util.Date.class, Type.DATE);
java2Columns.put(java.sql.Time.class, Type.TIME);
java2Columns.put(java.sql.Timestamp.class, Type.TIMESTAMP);
// =======================================================================
xls2Columns.put(new Integer(HSSFCell.CELL_TYPE_STRING), Type.VARCHAR);
xls2Columns.put(new Integer(HSSFCell.CELL_TYPE_BLANK), Type.VARCHAR);
xls2Columns.put(new Integer(HSSFCell.CELL_TYPE_BOOLEAN), Type.VARCHAR);
xls2Columns.put(new Integer(HSSFCell.CELL_TYPE_FORMULA), Type.VARCHAR);
xls2Columns.put(new Integer(HSSFCell.CELL_TYPE_NUMERIC), Type.FLOAT);
xls2Columns.put(java.lang.Double.TYPE, Type.FLOAT);
}
static {
populateWrappers();
}
// ------------------------------------------------------------------------
public static Class<?> column2Java(Type columnType) {
ColumnTypeMapper ctWrapper = (ColumnTypeMapper) colWrappers
.get(columnType);
Class<?> clazz = ctWrapper.getJavaClass();
return clazz;
}
public static int column2Xls(Type columnType) {
ColumnTypeMapper ctWrapper = (ColumnTypeMapper) colWrappers
.get(columnType.tag());
// System.err.println("ctWrapper="+ctWrapper+",columnType="+columnType);
int xlsFormat = ctWrapper.getXlsFormat();
return xlsFormat;
}
public static Type xls2Column(int format) {
Type type = (Type) xls2Columns.get(new Integer(format));
// fix me!!!
type = (type == null) ? Type.VARCHAR : type;
return type;
}
public static Type java2Column(Class<?> clazz) {
Type type = (Type) java2Columns.get(clazz);
// fix me!!!
type = (type == null) ? Type.VARCHAR : type;
return type;
}
public static class ColumnTypeMapper {
private Type columnType;
private Class<?> toJavaClazz;
private int toExcelFormat;
public ColumnTypeMapper(Type columnType, Class<?> javaClazz,
int excelFormat) {
this.columnType = columnType;
this.toJavaClazz = javaClazz;
this.toExcelFormat = excelFormat;
}
public Type getColumnType() {
return columnType;
}
public Class<?> getJavaClass() {
return toJavaClazz;
}
public int getXlsFormat() {
return toExcelFormat;
}
}
}
其实到现在我们这个模块已经做的七七八八了
接下来我们可以写两个测试类一个是导入的
package xls;
import java.io.FileInputStream;
import java.sql.Connection;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.poifs.filesystem.POIFSFileSystem;
import xls.core.LinkDB;
import xls.core.Record;
import xls.core.Schema;
import xls.io.SQLWriter;
import xls.io.XlsReader;
import xls.util.ConnUtils;
/**
* @author zouqh TODO 下午05:50:36
*/
public class XmlTest2 {
public final static String filePath = "D://project/excelUtil/conf_file/test2.xls";
public final static String xmlPath = "D://excelUtil/conf_file/";
public final static String xmlName = "test.xml";
public static String pathname = "D://project/excelUtil/conf_file/xls2sql.properties";
private static Record record = null;
public void defaultValue() {
}
public void difStyle() {
}
public void insertData() {
}
public static void main(String args[]) throws Exception {
Schema schema = new Schema(xmlPath,xmlName);
//schema.setPathname(pathname);
//schema.setFilePath(xmlPath);
//schema.setFileName(xmlName);
///schema.opendatabase();
schema.open();
LinkDB link=new LinkDB(pathname);
link.open();
POIFSFileSystem fs = new POIFSFileSystem(new FileInputStream(filePath));
HSSFWorkbook book = new HSSFWorkbook(fs);
HSSFSheet sheet = book.getSheetAt(0);
XlsReader reader = new XlsReader(schema, sheet);
Connection conn = ConnUtils.getConnection(link.getStoreConfig());
SQLWriter writer = new SQLWriter(schema, conn);
while (reader.hasNext()) {
record = reader.next();
System.out.println(record);
writer.write(record);
System.err.println(record);
System.out.println("返回SQL语句" + writer.generateSQL(record));
}
}
}
一个导出的
/**
*
*/
package xls;
import java.io.FileOutputStream;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.ResultSetMetaData;
import java.sql.SQLException;
import java.sql.Statement;
import xls.core.Column;
import xls.core.LinkDB;
import xls.core.Schema;
import xls.io.SQLReader;
import xls.io.XlsWriter;
import xls.util.ConnUtils;
import xls.util.TypeUtils;
/**
* @author zouqh TODO 下午05:24:27
*/
public class Test4 {
private static String outfile="D://project/excelUtil/conf_file/test1.xls";
private static void configSchema(Schema schema, ResultSetMetaData metaData)
throws SQLException, ClassNotFoundException {
int sizeColumn = metaData.getColumnCount();
String columnName = null;
String columnClass = null;
Class<?> clazz = null;
for (int i = 1; i <= sizeColumn; ++i) {
columnName = metaData.getColumnName(i);
columnClass = metaData.getColumnClassName(i);
// System.err.println("fgffgfgfgf:" + columnName);
clazz = Class.forName(columnClass);
schema.addColumn(new Column(i - 1, TypeUtils.java2Column(clazz),
TypeUtils.java2Column(clazz), TypeUtils.java2Column(clazz),
columnName));
}
}
public static void main(String args[]) throws Exception {
Schema schema = new Schema("你的文件的位置","叫什么名");
LinkDB linkdb=new LinkDB("");
schema.open();
linkdb.open();
Connection conn = ConnUtils.getConnection(linkdb.getStoreConfig());
Statement stm = conn.createStatement();
ResultSet rs = null;
String strSQL = schema.getQueryString().get(0);
System.out.println(strSQL);
if (strSQL == null) {
if (schema.getTableName() != null) {
strSQL = "select * from " + schema.getTableName();
}
}
if (strSQL != null) {
// System.err.println("你需要执行的SQL语句" + strSQL);
}
rs = stm.executeQuery(strSQL);
ResultSetMetaData rsm = rs.getMetaData();
configSchema(schema, rsm);
SQLReader reader = new SQLReader(schema, rs);
FileOutputStream fout=new FileOutputStream(outfile);
XlsWriter writer=new XlsWriter(schema,fout);
while (reader.hasNext()) {
writer.write(reader.next());
}
reader.close();
writer.close();
conn.close();
}
}
- 描述: 导入数据库的excel的数据
- 大小: 32.9 KB
- 描述: 需要的jar
- 大小: 17.6 KB
- 大小: 131.3 KB
- 描述: properties的配置文件
- 大小: 115.7 KB
- 描述: xml的配置文件
- 大小: 71 KB
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总结，Java通过Apache POI库处理Excel文档，结合JDBC进行数据库操作，实现了数据的导入导出。在实际应用中，可能还需要处理异常、优化性能，以及考虑并发和多线程等问题。理解并掌握这些技术，可以极大地提高Java...
在这个主题中，我们将深入探讨如何使用Java技术栈，特别是基于IDEA开发环境，来实现在JSP和Servlet中进行Excel与数据库之间的数据导入和导出。 首先，我们需要了解Java中用于处理Excel文件的库，如Apache POI。...
Java实现Excel导入导出数据库的方法示例主要介绍了Java实现Excel导入导出数据库的方法，结合实例形式分析了java针对Excel的读写及数据库操作相关实现技巧。该示例中，主要讲解了如何将Excel文件导入到数据库中，并...
本篇文章将深入探讨如何使用Java实现这两个功能，主要涉及的技术栈包括Apache POI库用于操作Excel，以及JDBC（Java Database Connectivity）用于与MySQL数据库进行交互。 首先，我们需要了解Apache POI库。这是一个...
在Java开发中，有时我们需要将数据库中的数据导出到Excel文件，或者从Excel文件导入数据到数据库。Apache POI是一个流行的API，专为处理Microsoft Office格式的文件，如Excel（.xlsx, .xls）。本教程将详细介绍如何...
这个"asp将EXCEL导入导出数据库原程序"提供了一个解决方案，能够方便地将Excel中的数据存入MSSQL数据库，同时也能将数据库中的数据导出到Excel文件。 首先，我们需要了解如何使用ASP连接MSSQL数据库。通常，这涉及...
用Java实现的Excel的导入导出，简洁明了，高质量代码。
本文将详细讲解如何使用Java实现从MySQL数据库的表导出到Excel文件的过程，以及涉及到的关键技术和工具。 首先，我们需要了解的是Java与数据库交互的基础——JDBC（Java Database Connectivity）。JDBC是Java API，...
2、java读取数据库数据，并导出为excel文件。 3、README.md中有详细的操作步骤示例。 使用说明： 1. 先使用postman导入：other/excel相关.postman_collection.json 2. 导入sql到数据库：other/excel.sql 3. idea导入...
在本项目中，"spring boot+mybatis plus+easy poi实现数据库导出成excel和excel导入到数据库"，开发者利用了Spring Boot、MyBatis Plus和EasyPoi库来实现了一个功能强大的数据交互系统，允许用户将数据库中的数据...
总的来说，这个项目展示了如何在Java环境中，结合Spring Boot的便利性，利用MyBatis进行数据库操作，借助Apache POI处理Excel文件，以及Thymeleaf生成动态页面，实现数据的导入导出功能。这是一个综合性的Java Web...
在"Java操作Excel之Poi模板导入导出"这个主题中，我们将深入探讨如何使用POI库来处理Excel模板，并进行数据的导入和导出。 首先，了解Excel模板的基本概念。模板通常包含预定义的样式、格式和计算，开发人员可以...
总之，这个项目是一个完整的Java解决方案，用于处理Excel文件的导入导出，同时具备用户友好的进度条显示。它利用了Apache POI的强大功能，结合maven的依赖管理，以及可能的GUI组件，提供了高效且直观的数据操作体验...
总的来说，熟练掌握Excel和数据库之间的数据导入导出技巧，对于提升工作效率，进行数据分析，甚至开发数据驱动的应用程序都至关重要。在实际操作中，我们还需要考虑数据的安全性、隐私保护以及性能优化等问题，确保...
总结起来，"使用poi从数据库导出excel表的示例"是一个结合了Struts1 MVC框架和Apache POI库的Java编程任务，它涉及数据库连接、SQL查询、Excel文件生成以及Web应用响应。这个过程不仅有助于数据的高效管理和分享，也...
本主题主要关注如何使用Java将数据库中的数据导出到Excel，以及如何从Excel文件导入数据到数据库。以下是一些关键知识点的详细说明： 1. **Java与Excel的交互**：Java中处理Excel文件最常用的库是Apache POI，它...
本项目"java编写的数据库导入和导出工具"旨在简化这个过程，支持对SQL Server和MySQL数据库进行数据的便捷操作。下面我们将详细探讨相关的Java编程知识点、数据库操作以及可能涉及的库和框架。 1. **Java编程基础**...
在Spring Boot中实现Excel的导入导出可以通过POI库来实现，POI是一个开源的Java库，用于处理Microsoft Office格式文件，包括Excel。一个简单的示例，演示如何在Spring Boot项目中使用POI来实现Excel的导入导出功能。...
总结来说，这个项目涵盖了Java编程、文件操作（尤其是Excel处理）、数据库连接与操作（通过JDBC和SQL）以及数据导入导出策略等多个IT核心技能。对于学习和提升这些技能，这个项目提供了一个很好的实践平台。
综上所述，通过配置文件实现Excel的导入导出和校验是一种高效且灵活的解决方案，它可以提升开发效率，简化代码，同时确保数据的质量。在实际项目中，我们可以结合具体的编程语言和库，根据配置文件来定制化我们的...