java-各种xml解析技术总结

java-各种xml解析技术总结

 

需要导入相关jar包：

1、dom：
  DOMParser dOMParser = new DOMParser();
            dOMParser.parse(fileName);
            Document document = dOMParser.getDocument();
            Element element = document.getDocumentElement();
            NodeList studentNl = element.getElementsByTagName("student");
2、jdom：
    //使用ＳＡＸBuilder将给定的ＸＭＬ文档读入JDOM Document对象，
            SAXBuilder builder = new SAXBuilder();
            Document doc = builder.build(new File("D:/eclipseCode/edipsegaoji/xmlDom/src/student.xml"));
            Element foo = doc.getRootElement();
            List allChildren = foo.getChildren();
            for (int i = 0; i < allChildren.size(); i++) {
                Element e=(Element) allChildren.get(i);
                if(e.getName().equals("student")){
                    System.out.println("name:" +((Element) allChildren.get(i)).getChild("name").getText());
                    System.out.println("sex:"+ ((Element) allChildren.get(i)).getChild("sex").getText());   
                   List ll=e.getChildren();
                   System.out.println("ll =" +ll.size());
                    for (int j = 0; j < ll.size(); j++) {
                        Element e1=(Element) ll.get(j);
                        if(e1.getName().equals("lesson")){
                            System.out.println("lessonName:" +((Element) ll.get(j)).getChild("lessonName").getText());
                            System.out.println("lessonScore:"+ ((Element) ll.get(j)).getChild("lessonScore").getText());
                        }
                    }
               
                }
            }
3、dom4j：
File f = new File("D:/eclipseCode/edipsegaoji/xmlDom/src/student.xml");
            SAXReader reader = new SAXReader();
            Document doc = reader.read(f);
            Element root = doc.getRootElement();
            Element foo;
            Element foochild;
            System.out.println("XML文件开始解析");
            for (Iterator i = root.elementIterator("student"); i.hasNext();) {
                foo = (Element) i.next();
                System.out.println("name :" + foo.elementText("name"));
                System.out.println("sex :" + foo.elementText("sex"));
                for (Iterator j= foo.elementIterator("lesson"); j.hasNext();) {
                    foochild = (Element) j.next();
                    System.out.print(foochild.elementText("lessonName"));
                    System.out.println(" :" + foochild.elementText("lessonScore"));
                }
            }
4、sax：
/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package sax;

import org.xml.sax.Attributes;
import org.xml.sax.ContentHandler;
import org.xml.sax.Locator;
import org.xml.sax.SAXException;
import org.xml.sax.XMLReader;
import org.xml.sax.helpers.XMLReaderFactory;

/**
 *
 * @author 尹彬
 */
public class TestSaxParser {

    public static void saxParserTest() {
        try {
            XMLReader xMLReader = XMLReaderFactory.createXMLReader("org.apache.xerces.parsers.SAXParser");
            xMLReader.setContentHandler(new ContentHandler() {

                private int k;
                //DTD中定义的元素名
                private static final String ELEMENT_NAME = "name";
                private static final String ELEMENT_SEX = "sex";
                private static final String ELEMENT_LESSON = "lesson";
                private static final String ELEMENT_LESSON_NAME = "lessonName";
                private static final String ELEMENT_LESSON_SCORE = "lessonScore";
                private static final String ELEMENT_STUDENT = "student";
                private static final String ELEMENT_LINE = "breakLine";
                //当前元素的数据
                private String currentData = "";
                private String lessonName = "";
                private String lessonScore = "";

                /**
                 * 当其他某一个调用事件发生时，先调用此方法来在文档中定位。
                 */
                public void setDocumentLocator(Locator locator) {
                }

                /**
                 * 在解析整个文档开始时调用
                 */
                public void startDocument() throws SAXException {
                    System.out.println("XML文件开始解析");
                }

                /**
                 * 在解析整个文档结束时调用
                 */
                public void endDocument() throws SAXException {
                    System.out.println("XML文件解析结束");
                }

                /**
                 * 在解析命名空间开始时调用
                 */
                public void startPrefixMapping(String prefix, String uri) throws SAXException {
                }

                /**
                 * 在解析命名空间结束时调用
                 */
                public void endPrefixMapping(String prefix) throws SAXException {
                }

                /**
                 * 在解析元素开始时调用
                 */
                public void startElement(String namespaceURI, String localName, String qName, Attributes atts) throws SAXException {
                }

                /**
                 * 在解析元素结束时调用
                 * @param namespaceURI
                 * @param localName 本地名，如student
                 * @param qName 原始名
                 */
                public void endElement(String namespaceURI, String localName, String qName) throws SAXException {
                    //System.out.println(++k +" = endElement");
                    if (localName.equals(ELEMENT_NAME)) {
                        System.out.println(localName + ":" + currentData);
                    }

                    if (localName.equals(ELEMENT_SEX)) {
                        System.out.println(localName + ":" + currentData);
                    }

                    if (localName.equals(ELEMENT_LESSON_NAME)) {
                        System.out.println(++k + " = lessonName");
                        this.lessonName = currentData;
                    }

                    if (localName.equals(ELEMENT_LESSON_SCORE)) {
                        System.out.println(++k + " = lessonScore");
                        this.lessonScore = currentData;
                    }

                    if (localName.equals(ELEMENT_LESSON)) {
                        System.out.println(++k + " = lession");
                        System.out.println(lessonName + ":" + lessonScore);
                    }

                    if (localName.equals(ELEMENT_LINE)) {
                        System.out.println("------------------------------------");
                    }
                }

                /**
                 * 取得元素数据
                 */
                public void characters(char[] ch, int start, int length) throws SAXException {
                    currentData = new String(ch, start, length).trim();
                }

                /**
                 * 取得元素数据中的空白
                 */
                public void ignorableWhitespace(char[] ch, int start, int length) throws SAXException {
                }

                /**
                 * 在解析到处理指令时，调用此方法。
                 * 这些处理指令不包括XML的版权指令，它由解析器本身识别。
                 */
                public void processingInstruction(String target, String data) throws SAXException {
                }

                /**
                 * 当未验证解析器忽略实体时调用此方法
                 */
                public void skippedEntity(String name) throws SAXException {
                }
            });
            xMLReader.parse(TestSaxParser.class.getResource("/") + "student.xml");
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

下面是xml：
<?xml version="1.0" encoding="UTF-8"?>

<!--
    Document   : student.xml
    Created on : 2010年4月6日, 下午3:01
    Author     : Administrator
    Description:
        Purpose of the document follows.
-->
<!DOCTYPE StudentInfo SYSTEM "student.dtd">
<StudentInfo>
    <student>
        <name>刘伟</name>
        <sex>男</sex>
        <lesson>
            <lessonName>Java初级</lessonName>
            <lessonScore>85</lessonScore>
        </lesson>
        <lesson>
            <lessonName>Oracle数据库</lessonName>
            <lessonScore>95</lessonScore>
        </lesson>
        <lesson>
            <lessonName>Java中级</lessonName>
            <lessonScore>80</lessonScore>
        </lesson>
        <lesson>
            <lessonName>Java高级</lessonName>
            <lessonScore>100</lessonScore>
        </lesson>
    </student>
    <breakLine />
    <student>
        <name>花木兰</name>
        <sex>女</sex>
        <lesson>
            <lessonName>射箭</lessonName>
            <lessonScore>100</lessonScore>
        </lesson>
        <lesson>
            <lessonName>柔道</lessonName>
            <lessonScore>95</lessonScore>
        </lesson>
        <lesson>
            <lessonName>国学</lessonName>
            <lessonScore>80</lessonScore>
        </lesson>
        <lesson>
            <lessonName>烹饪</lessonName>
            <lessonScore>60</lessonScore>
        </lesson>
        <lesson>
            <lessonName>游泳</lessonName>
            <lessonScore>70</lessonScore>
        </lesson>
    </student>
    <breakLine/>
</StudentInfo>