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 + "" + 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;




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

    public CreateExcel(){

    }
    
    
    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");
   return sffer.toString();
 } else {
   sffer.append("");
 }
 
 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("" + sfm + "");
 sffer.append("" + path + "");
 sffer.append("" + fileName + "");
 sffer.append("" + outPutInfo + "");
  
 return sffer.toString();
      } 
      catch (Exception e) {
 e.printStackTrace();
 throw new Exception(e.getMessage());
      }
    }

}

后台代码

  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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