java导出excel须要使用HSSFWorkbook这个类，须要导入poi-3.6-20091214.jar

工具类调用例如以下:

package com.qlwb.business.util;

import java.io.IOException;

import java.io.OutputStream;

import java.net.URLEncoder;

import java.util.List;

import javax.servlet.http.HttpServletResponse;

import org.apache.poi.hssf.usermodel.HSSFCell;

import org.apache.poi.hssf.usermodel.HSSFCellStyle;

import org.apache.poi.hssf.usermodel.HSSFFont;

import org.apache.poi.hssf.usermodel.HSSFRow;

import org.apache.poi.hssf.usermodel.HSSFSheet;

import org.apache.poi.hssf.usermodel.HSSFWorkbook;

import org.apache.poi.hssf.util.HSSFColor;

import org.apache.poi.ss.util.CellRangeAddress;

/**

* 导出报表的公共类,提供公共的导出报表的方法

* @Copyright: Copyright (c) 2015

* @Company:

* @author 鹿伟伟

*

*/

public class ExportExcel {

static boolean tempDirflag1 = true;

static boolean tempDirflag2 = true;

/**

* 依据传入的集合数据生成报表的方法

*

* @param list

* 报表标题表头及数据封装的list,格式：list的第一条数据是标题。String类型；第二条数据是表头列表，List类型；从第三条開始是数据列表

* ，List类型

* @param filename

* 报表excel的文件名称，不须要扩展名

* @param response

* HttpServletResponse

* @return 1表示成功 0表示失败

* @throws IOException

* @Create luweiwei 2015-08-18

* @change

*/

@SuppressWarnings("unchecked")

public static int createReport(List list, String filename,

HttpServletResponse response) throws IOException {

// 数据list至少包含标题和表头

if (list.size() < 2) {

return 0;

}

// 组装excel

HSSFWorkbook workbook = new HSSFWorkbook();

HSSFSheet sheet = workbook.createSheet();

// 设置Excel标题字体和样式

HSSFFont headFont = workbook.createFont();

headFont.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);

headFont.setFontHeightInPoints((short) 20);

HSSFCellStyle headCellStyle = workbook.createCellStyle();

headCellStyle.setFont(headFont);

// headCellStyle.setBorderLeft(HSSFCellStyle.BORDER_THIN);

// headCellStyle.setBorderTop(HSSFCellStyle.BORDER_THIN);

// headCellStyle.setBorderRight(HSSFCellStyle.BORDER_THIN);

// headCellStyle.setBorderBottom(HSSFCellStyle.BORDER_THIN);

headCellStyle.setAlignment(HSSFCellStyle.ALIGN_CENTER);

headCellStyle.setWrapText(true);

headCellStyle.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);

// headCellStyle.setFillForegroundColor(GREEN_COLOR);

// 设置Excel表头的字体和样式

HSSFFont thfont = workbook.createFont();

thfont.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);

HSSFCellStyle thCellStyle = workbook.createCellStyle();

thCellStyle.setFont(thfont);

thCellStyle.setBorderLeft(HSSFCellStyle.BORDER_THIN);

thCellStyle.setBorderTop(HSSFCellStyle.BORDER_THIN);

thCellStyle.setBorderRight(HSSFCellStyle.BORDER_THIN);

thCellStyle.setBorderBottom(HSSFCellStyle.BORDER_THIN);

thCellStyle.setAlignment(HSSFCellStyle.ALIGN_CENTER);

thCellStyle.setFillForegroundColor(HSSFColor.GREY_25_PERCENT.index);

thCellStyle.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);

// 设置Excel内容的字体和样式

HSSFFont font = workbook.createFont();

font.setBoldweight(HSSFFont.BOLDWEIGHT_NORMAL);

HSSFCellStyle titleCellStyle = workbook.createCellStyle();

titleCellStyle.setFont(font);

titleCellStyle.setBorderLeft(HSSFCellStyle.BORDER_THIN);

titleCellStyle.setBorderTop(HSSFCellStyle.BORDER_THIN);

titleCellStyle.setBorderRight(HSSFCellStyle.BORDER_THIN);

titleCellStyle.setBorderBottom(HSSFCellStyle.BORDER_THIN);

titleCellStyle.setAlignment(HSSFCellStyle.ALIGN_LEFT);

// titleCellStyle.setFillForegroundColor(GREEN_COLOR);

// 单元格居左样式

HSSFCellStyle cellLeft = null;

// 单元格居中样式

HSSFCellStyle cellCenter = null;

// 单元格居右样式

HSSFCellStyle cellRight = null;

// 单元格居左样式

cellLeft = workbook.createCellStyle();

cellLeft.setBorderLeft(HSSFCellStyle.BORDER_THIN);

cellLeft.setBorderTop(HSSFCellStyle.BORDER_THIN);

cellLeft.setBorderRight(HSSFCellStyle.BORDER_THIN);

cellLeft.setBorderBottom(HSSFCellStyle.BORDER_THIN);

cellLeft.setAlignment(HSSFCellStyle.ALIGN_LEFT);

// 单元格居中样式

cellCenter = workbook.createCellStyle();

cellCenter.setBorderLeft(HSSFCellStyle.BORDER_THIN);

cellCenter.setBorderTop(HSSFCellStyle.BORDER_THIN);

cellCenter.setBorderRight(HSSFCellStyle.BORDER_THIN);

cellCenter.setBorderBottom(HSSFCellStyle.BORDER_THIN);

cellCenter.setAlignment(HSSFCellStyle.ALIGN_CENTER);

// 单元格居右样式

cellRight = workbook.createCellStyle();

cellRight.setBorderLeft(HSSFCellStyle.BORDER_THIN);

cellRight.setBorderTop(HSSFCellStyle.BORDER_THIN);

cellRight.setBorderRight(HSSFCellStyle.BORDER_THIN);

cellRight.setBorderBottom(HSSFCellStyle.BORDER_THIN);

cellRight.setAlignment(HSSFCellStyle.ALIGN_RIGHT);

// 第一行

// 合并标题单元格

sheet.addMergedRegion(new CellRangeAddress(0, 0, 0,

((List) list.get(1)).size() - 1));

HSSFRow row = sheet.createRow(0);

row.setHeightInPoints(40);

HSSFCell cell = null;

cell = row.createCell(0);

cell.setCellStyle(headCellStyle);

cell.setCellValue((String) (list.get(0)));

// 设置表头单元格

List tmpList = null;

tmpList = (List) list.get(1);

int rownum = sheet.getLastRowNum();

row = sheet.createRow(rownum + 1);

for (int i = 0; i < tmpList.size(); i++) {

sheet.setColumnWidth(i, 6000);

cell = row.createCell(i);

cell.setCellStyle(thCellStyle);

cell.setCellValue(tmpList.get(i));

}

// 循环设置数据的单元格

for (int i = 2; i < list.size(); i++) {

tmpList = (List) list.get(i);

rownum = sheet.getLastRowNum();

row = sheet.createRow(rownum + 1);

for (int j = 0; j < tmpList.size(); j++) {

cell = row.createCell(j);

cell.setCellStyle(titleCellStyle);

cell.setCellValue(tmpList.get(j));

}

}

response.setHeader("Content-disposition", "attachment; filename="

+ URLEncoder.encode(filename, "utf-8") + ".xls");

response.setContentType("application/msexcel;charset=utf-8");

OutputStream out = null;

try {

out = response.getOutputStream();

out.flush();

workbook.write(out);

} finally {

try {

if(out!=null){

out.close();

}

} catch (IOException e) {

e.printStackTrace();

}

}

return 1;

}

}