java导出excel工具类

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<Object> 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<String>) 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<String> tmpList = null;
        tmpList = (List<String>) 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<String>) 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;
    }
}