Java程序实现导出Excel的方法(支持IE低版本)

今天想整理一下自己前段时间遇到的一个导出的问题。

因为项目的需求，要做一部分导出功能。开始的时候用的公司的导出，但是很奇怪有部分模块导出的时候就是会报500错误，发现在删减一些字段后就恢复了正常，当时因为项目紧张，也就临时删减了一些，但也不是长久之计，之后自己在原本的基础上重新修改整理了一下，目前运行还算稳定，就此和大家分享一下。

导出需要三个部分，js，公共方法，后台方法。

js代码

function exportData()
{
    //前台接收的参数
  rwmc = $("#txt_rwmc").val();
   rwlb = $("#com_rwlb").combobox("getValues").join(",");

  //调用后台导出功能
  var service = new Service("cx.RybjcxBndService.exprotExcel");
  var str="<RWMC>" + rwmc + "</RWMC><RWLB>" + rwlb + "</RWLB>";
  var res = service.doService(str);
  var oDoc = loadXml(res);
  if (service.getCode() != "2000") {
    showMessage("查询失败："+service.getMessage());
    return;
  }
  var nodata = oDoc.selectSingleNode("ROOT/NODATA").text;
  if (nodata == "nodata") {
    showMessage("无数据!");
    return;
  }
  // 获取导出信息
  var titleName = oDoc.selectSingleNode("ROOT/TITLE_NAME").text;
  var fileName = oDoc.selectSingleNode("ROOT/FILE_NAME").text;
  var outPutInfo = oDoc.selectSingleNode("ROOT/OUTPUTINFO").text;
  var download_path = oDoc.selectSingleNode("ROOT/DOWNLOAD_PATH").text;
  if (outPutInfo != "") {
    showMessage(outPutInfo);
    return;
  }
  if (confirm("导出成功!确认下载文件吗？\n文件名称为："+fileName)) {
    var file = fileName;
    var showfile = titleName + ".xls";
    showfile = decodeURIComponent(showfile);
    var idx = document.URL.indexOf("/adp");
    if (idx == -1) {
      alert("无法识别主机地址：" + document.URL);
      return;
    }
    var host = document.URL.substring(0, idx);
    var width = screen.width;
    var height = screen.height;
    debugger;
    // 打开下载页面
    var param = "toolbar=no,location=no,status=yes,resizable=no,scrollbars=yes,top=" + height + ",left=" + width + ",width=100,height=100";
    // ----------------------------------------------------------
    // 此代码块为解决ie6下导出excel失败问题，原因是ie6对window.open(url)支持度不好,
    // 当浏览器为ie6时改用window.location.href
    var isIE=!!window.ActiveXObject;
    var isIE6=isIE&&!window.XMLHttpRequest;
    if (isIE6) {
      window.location.href=host + "/adp/work/gzkp/common/js/download_new.jsp?file=" + file + "&showfile=" + showfile + "&download_path=" + download_path;
    } else {
      window.open(host + "/adp/work/gzkp/common/js/download_new.jsp?file=" + file + "&showfile=" + showfile + "&download_path=" + download_path, "_blank", param);
    }
  }
}

公共类

package ctais.business.gzkp.common;
import java.io.File;
import java.io.FileInputStream;
import java.text.SimpleDateFormat;
import java.util.Date;

import org.apache.poi2.hssf.usermodel.HSSFCell;
import org.apache.poi2.hssf.usermodel.HSSFCellStyle;
import org.apache.poi2.hssf.usermodel.HSSFFont;
import org.apache.poi2.hssf.usermodel.HSSFRow;
import org.apache.poi2.hssf.usermodel.HSSFSheet;
import org.apache.poi2.hssf.usermodel.HSSFWorkbook;

import ctais.business.dashboard.service.ExportExcel;

import ctais.config.Config;
import ctais.services.data.DataWindow;
import ctais.services.xml.XMLDataObject;
import ctais.services.xml.XMLParser;
import ctais.util.StringEx;
import jxl.Workbook;
import jxl.format.Alignment;
import jxl.write.Label;
import jxl.write.WritableCellFormat;
import jxl.write.WritableFont;
import jxl.write.WritableSheet;
import jxl.write.WritableWorkbook;

/**
 * <p>Title: 生成EXCEL文件</p>
 * <p>Description: 转换String字符串为EXCEL文档</p>
 * <p>Copyright: Copyright (c) 2004</p>
 * <p>Company: DC</p>
 * @author FENGZG
 * @version 1.0
 * 时间：2015-12-28
 */

public class CreateExcel {
    private final static String CONFIG_FILE_PATH = Config.CTAIS_HOME;
    WritableWorkbook wwb = null;
    XMLDataObject xdo = null;

    public CreateExcel(){

    }

    /**
     * 生成EXCEL
     * @param sql 查询SQL
     * @param czryDm 操作人员代码
     * @param titles 导出列标题
     * @param exlTitle excel表头
     * @return
     * @throws Exception
     */
    public String newToExcel(String sql,String czryDm,String[] titles,String exlTitle) throws Exception
    {
      try {
        HSSFWorkbook wb = new HSSFWorkbook();
        HSSFSheet sheet = wb.createSheet();
        ExportExcel exportExcel = new ExportExcel(wb, sheet);
        StringBuffer sffer = new StringBuffer();
        //int colNum = 30;

        DataWindow dw = DataWindow.dynamicCreate(sql.toString());
        dw.setConnectionName(Icomm.GZKPJNDI);
        long dwRet = dw.retrieve();
        if (dwRet <= 0) {
          sffer.append("<NODATA>nodata</NODATA>");
          return sffer.toString();
        } else {
          sffer.append("<NODATA></NODATA>");
        }

        int colNum = dw.getColumnCount();

        // 给工作表列定义列宽(实际应用自己更改列数)
        for (short i = 0; i <= colNum; i++) {
          sheet.setColumnWidth(i, (short) 4000);
        }
        // 创建单元格样式
        HSSFCellStyle cellHeadStyle = wb.createCellStyle();
        // 指定单元格居中对齐
        cellHeadStyle.setAlignment(HSSFCellStyle.ALIGN_CENTER);
        // 指定单元格垂直居中对齐
        cellHeadStyle.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);
        // 指定当单元格内容显示不下时自动换行
        cellHeadStyle.setWrapText(true);
        // 设置单元格字体
        HSSFFont headFont = wb.createFont();
        headFont.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);
        headFont.setFontName("宋体");
        headFont.setFontHeight((short) 200);
        cellHeadStyle.setFont(headFont);

        // 创建报表头部
        Date dt=new Date();
        SimpleDateFormat sdt=new SimpleDateFormat("yyyyMMddhhmmssS");
        String sfm = czryDm + "_" + sdt.format(dt);

        // 设置列头
        exportExcel.createNormalHead(exlTitle, colNum-1);
        HSSFRow row1 = sheet.createRow(1);

        for(int i = 0; i < titles.length; i ++) {
          HSSFCell cell = row1.createCell((short)i);
          cell.setEncoding(HSSFCell.ENCODING_UTF_16);
          cell.setCellStyle(cellHeadStyle);
          cell.setCellValue(titles[i]);
        }
        Object value = "";

        //设置表格样式
        HSSFCellStyle cellStyle = wb.createCellStyle();
        // 指定单元格居中对齐
        cellStyle.setAlignment(HSSFCellStyle.ALIGN_CENTER);
        // 指定单元格垂直居中对齐
        cellStyle.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);
        // 指定当单元格内容显示不下时自动换行
        cellStyle.setWrapText(true);
        // 设置单元格字体
        HSSFFont font = wb.createFont();
        font.setBoldweight(HSSFFont.SS_NONE);
        font.setFontName("宋体");
        font.setFontHeight((short) 200);
        cellStyle.setFont(font);
        for(int i = 0 ; i < dw.getRowCount(); i++) {
          HSSFRow row = sheet.createRow(i + 2);
          for(int j = 1; j <= dw.getColumnCount(); j++) {
            HSSFCell cell = row.createCell((short)(j-1));
            cell.setEncoding(HSSFCell.ENCODING_UTF_16);
            cell.setCellStyle(cellStyle);
            value = dw.getItemAny(i, j-1);
            if(value == null) {
              cell.setCellValue("");
            } else {
              cell.setCellValue(value.toString());
            }
          }
        }
        //设置导出路径，此处需要注意如果是Linux系统需要手动建路径，（此处的原因有人比较清楚的话还请指教）引用新建的文件路径
        String path = "/export/";
        File file = new File(path);
        if(!file.exists()) {
          file.mkdirs();
        }

        String fileName = sfm+".xls";

        //String pth = path.trim() + File.separator + fileName;
        String pth = path.trim() + fileName;
        pth = pth.trim();

        String outPutInfo = exportExcel.outputExcel(pth);

        sffer.append("<TITLE_NAME>" + sfm + "</TITLE_NAME>");
        sffer.append("<DOWNLOAD_PATH>" + path + "</DOWNLOAD_PATH>");
        sffer.append("<FILE_NAME>" + fileName + "</FILE_NAME>");
        sffer.append("<OUTPUTINFO>" + outPutInfo + "</OUTPUTINFO>");

        return sffer.toString();
      }
      catch (Exception e) {
        e.printStackTrace();
        throw new Exception(e.getMessage());
      }
    }

}

后台代码

/**
   * 导出功能
   * @param xdo 前台传参
   * @param czryDm 操作人员代码
   * @return 生成的XLS信息
   * @throws Exception 异常说明
   */
  public String exportExcel(XMLDataObject args,String czryDm) throws Exception
  {
    //接收前台传递的查询参数
    String rwmc = StringEx.sNull(args.getItemValue("RWMC"));
    String rwlb = StringEx.sNull(args.getItemValue("RWLB"));

    if(null != rwmc && !"".equals(rwmc))
    {
      sqlWhere.append(" AND A.RWMC LIKE '%"+rwmc+"%' ");
    }
    if(null != rwlb && !"".equals(rwlb))
    {
      sqlWhere.append(" AND A.RWLB_DM = '"+rwlb+"' ");
    }

    StringBuilder sql = new StringBuilder();
    //拼接查询SQL
    sql.append("SELECT RWXH,RWMC FROM RWXX")
      .append(sqlWhere).append(" ORDER BY RWXH ) ").append(sqlisWhere);
    //导出的列标题
    String[] titles = {"任务序号","任务名称"};

    //实例化公共类
    CreateExcel excel = new CreateExcel();
    return excel.newToExcel(sql.toString(), czryDm,titles,"Exlcel表头");
  }

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