Java程序实现导出Excel，支持IE低版本

　　来博客园两年多了，最近才开通了微博，因为懒所以也一直没有写东西，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>  */

 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");
     }