excelexport

package com.tranzda.appstore.common;

import java.io.*;
import java.lang.reflect.*;
import java.util.*;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import java.text.SimpleDateFormat;
import javax.swing.JOptionPane;
import org.apache.poi.hssf.usermodel.*;
import org.apache.poi.hssf.util.HSSFColor;

public class ExcelUtil<T> {

public void exportExcel(Collection<T> dataset, OutputStream out) {
exportExcel("sheet1", null, dataset, out, "yyyy-MM-dd");
}

public void exportExcel(String[] headers, Collection<T> dataset,
OutputStream out) {
exportExcel("sheet1", headers, dataset, out, "yyyy-MM-dd");
}

public void exportExcel(String[] headers, Collection<T> dataset,
OutputStream out, String pattern) {
exportExcel("sheet1", headers, dataset, out, pattern);
}

/**
* 这是一个通用的方法，利用了JAVA的反射机制，可以将放置在JAVA集合中并且符号一定条件的数据以EXCEL 的形式输出到指定IO设备上
*
* @param title表格标题名
* @param headers表格属性列名数组
* @param dataset
*            需要显示的数据集合,集合中一定要放置符合javabean风格的类的对象。此方法支持的javabean属性的数据类型有基本数据类型及String,Date,byte[](图片数据)
* @param out
*            与输出设备关联的流对象，可以将EXCEL文档导出到本地文件或者网络中
* @param pattern
*            如果有时间数据，设定输出格式。默认为"yyy-MM-dd"
*/

@SuppressWarnings("unchecked")
public void exportExcel(String title, String[] headers,
Collection<T> dataset, OutputStream out, String pattern) {
// 声明一个工作薄
HSSFWorkbook workbook = new HSSFWorkbook();
// 生成一个表格
HSSFSheet sheet = workbook.createSheet(title);
// 设置表格默认列宽度为15个字节
sheet.setDefaultColumnWidth((short) 15);
// 生成一个样式
HSSFCellStyle style = workbook.createCellStyle();
// 设置这些样式
style.setFillForegroundColor(HSSFColor.SKY_BLUE.index);
style.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);
style.setBorderBottom(HSSFCellStyle.BORDER_THIN);
style.setBorderLeft(HSSFCellStyle.BORDER_THIN);
style.setBorderRight(HSSFCellStyle.BORDER_THIN);
style.setBorderTop(HSSFCellStyle.BORDER_THIN);
style.setAlignment(HSSFCellStyle.ALIGN_CENTER);
// 生成一个字体
HSSFFont font = workbook.createFont();
font.setColor(HSSFColor.VIOLET.index);
font.setFontHeightInPoints((short) 12);
font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);
// 把字体应用到当前的样式
style.setFont(font);
// 生成并设置另一个样式
HSSFCellStyle style2 = workbook.createCellStyle();
style2.setFillForegroundColor(HSSFColor.LIGHT_YELLOW.index);
style2.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);
style2.setBorderBottom(HSSFCellStyle.BORDER_THIN);
style2.setBorderLeft(HSSFCellStyle.BORDER_THIN);
style2.setBorderRight(HSSFCellStyle.BORDER_THIN);
style2.setBorderTop(HSSFCellStyle.BORDER_THIN);
style2.setAlignment(HSSFCellStyle.ALIGN_CENTER);
style2.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);
// 生成另一个字体
HSSFFont font2 = workbook.createFont();
font2.setBoldweight(HSSFFont.BOLDWEIGHT_NORMAL);
// 把字体应用到当前的样式
style2.setFont(font2);
// 声明一个画图的顶级管理器
HSSFPatriarch patriarch = sheet.createDrawingPatriarch();
// 定义注释的大小和位置,详见文档
// HSSFComment comment = patriarch.createComment(new HSSFClientAnchor(0,
// 0, 0, 0, (short) 4, 2, (short) 6, 5));
// // 设置注释内容
// comment.setString(new HSSFRichTextString("可以在POI中添加注释！"));
// // 设置注释作者，当鼠标移动到单元格上是可以在状态栏中看到该内容.
// comment.setAuthor("leno");
// 产生表格标题行
HSSFRow row = sheet.createRow(0);
for (short i = 0; i < headers.length; i++) {
HSSFCell cell = row.createCell(i);
cell.setCellStyle(style);
HSSFRichTextString text = new HSSFRichTextString(headers[i]);
cell.setCellValue(text);
}
// 遍历集合数据，产生数据行
Iterator<T> it = dataset.iterator();
int index = 0;
while (it.hasNext()) {
index++;
row = sheet.createRow(index);
T t = (T) it.next();
// 利用反射，根据javabean属性的先后顺序，动态调用getXxx()方法得到属性值
Field[] fields = t.getClass().getDeclaredFields();
for (short i = 0; i < fields.length; i++) {
HSSFCell cell = row.createCell(i);
cell.setCellStyle(style2);
Field field = fields[i];
field.setAccessible(true);
String fieldName = field.getName();
String getMethodName = "get"
+ fieldName.substring(0, 1).toUpperCase()
+ fieldName.substring(1);
try {
Class tCls = t.getClass();
Method getMethod = tCls.getMethod(getMethodName,
new Class[] {});
Object value = getMethod.invoke(t, new Object[] {});
// 判断值的类型后进行强制类型转换
String textValue = "";
if (value != null) {
if (value instanceof Boolean) {
boolean bValue = (Boolean) value;
textValue = "男";
if (!bValue) {
textValue = "女";
}
} else if (value instanceof Date) {
Date date = (Date) value;
SimpleDateFormat sdf = new SimpleDateFormat(pattern);
textValue = sdf.format(date);
} else if (value instanceof byte[]) {
// 有图片时，设置行高为60px;
row.setHeightInPoints(60);
// 设置图片所在列宽度为80px,注意这里单位的一个换算
sheet.setColumnWidth(i, (short) (35.7 * 80));
// sheet.autoSizeColumn(i);
byte[] bsValue = (byte[]) value;
HSSFClientAnchor anchor = new HSSFClientAnchor(0,
0, 1023, 255, (short) 6, index, (short) 6,
index);
anchor.setAnchorType(2);
patriarch.createPicture(anchor, workbook
.addPicture(bsValue,
HSSFWorkbook.PICTURE_TYPE_JPEG));
} else {
// 其它数据类型都当作字符串简单处理
textValue = value.toString();
}
}
// 如果不是图片数据，就利用正则表达式判断textValue是否全部由数字组成
if (textValue != null) {
Pattern p = Pattern.compile("^\\d+(\\.\\d+)?$");
Matcher matcher = p.matcher(textValue);
if (matcher.matches()) {
cell.setCellValue(Double.parseDouble(textValue));
} else {
HSSFRichTextString richString = new HSSFRichTextString(
textValue);
HSSFFont font3 = workbook.createFont();
font3.setColor(HSSFColor.BLUE.index);
richString.applyFont(font3);
cell.setCellValue(richString);
}
}
} catch (SecurityException e) {
e.printStackTrace();
} catch (NoSuchMethodException e) {
e.printStackTrace();
} catch (IllegalArgumentException e) {
e.printStackTrace();
} catch (IllegalAccessException e) {
e.printStackTrace();
} catch (InvocationTargetException e) {
e.printStackTrace();
} finally {
// 清理资源
}

}

}

try {

workbook.write(out);

} catch (IOException e) {

e.printStackTrace();

}

}

}


public String exportBilling() throws AppStoreException{
try {

String[] headers = { "帐单ID", "用户ID", "用户名称", "商品ID", "商品名称",
"原价格", "真实价格","状态","扣费网元","付费方ID","定购ID","付费类型","创建时间" };
if (searchBillingForm == null) {
searchBillingForm = new SearchBillingForm();
}
if (pagination == null) {
pagination = new Pagination<SearchBillingResult>();
}
pagination.setCurrentPage(currentPage);

SearchBillingDTO searchBillingDTO = new SearchBillingDTO();
searchBillingDTO.setQueryForm(searchBillingForm);
searchBillingDTO.setPagination(pagination);

List<ExcelBillingVO>  billingList=billingService.queryBillingListByCondtion(searchBillingDTO);

HttpServletResponse response=ServletActionContext.getResponse();
OutputStream out = response.getOutputStream();
response.setContentType("octets/stream");
    response.addHeader("Content-Disposition", "attachment;filename=billing.xls");
ExcelUtil excelUtil = new ExcelUtil();
excelUtil.exportExcel(headers, billingList, out);
out.flush();
out.close();
} catch (Exception e) {
e.printStackTrace();
}
return null;
}