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1.关于“下载”
需要设置页面header的一个属性为：Content-Disposition: attachment; filename=下载的文件.txt
如：
<a href="down.jsp">下载</a> down.jsp: <% response.setHeader("Content-Disposition", "attachment;fileName=download.txt"); %>
2.关于Execl
使用jxl的
jxl地址：http://www.andykhan.com/jexcelapi/download.html
这里面有jar包和api文档，还有一些例子。
下面看正文了。
<%@ page language="java" contentType="text/html; charset=utf-8" pageEncoding="utf-8"%> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> <title>导出Execl</title> <script type="text/javascript" src="jquery-1.10.2.min.js"></script> <script type="text/javascript"> function toExecl(){ //解析表格 var arrData=new Array(); var jsonData = "["; var objTable=document.getElementById("tab"); if(objTable) { for(var i=0;i<objTable.rows.length;i++)//行 { //每一行开始 var rowData = "{"; for(var j=0;j<objTable.rows[i].cells.length;j++)//列 { //每一行的数据 if(j > 0){ rowData = rowData + "," + objTable.rows[i].cells[j].innerText; }else{ rowData = rowData + objTable.rows[i].cells[j].innerText; } } //每一行结尾 if(i < (objTable.rows.length -1)){ rowData = rowData + "}," }else{ rowData = rowData + "}" } //添加每一行到json字符串中 jsonData = jsonData + rowData; } } jsonData = jsonData + "]"; //alert(jsonData); /* //发送ajax请求 $.ajax({ url: "toExecl", type: "POST", data: {"jsonData": jsonData}, dataType: "text", cache: false, success: function (result) { alert("success"); } }); */ var form=$("<form>");//定义一个form表单 form.attr("style","display:none"); form.attr("target",""); form.attr("method","post"); form.attr("action","toExecl");//跳转到servlet var input1=$("<input>"); input1.attr("type","hidden"); input1.attr("name","jsonData"); input1.attr("value",jsonData); $("body").append(form);//将表单放置在web中 form.append(input1); form.submit();//表单提交 } //下载 function downloadDoc(filePath,fileName){ var path = filePath+fileName; var contextLength = "<%=request.getContextPath()%>"; var sp = path.substring(contextLength.length,path.length); document.getElementById("path").value = sp; document.getElementById("fileName").value = fileName; //down_frame.location.href = path;decodeURI(path);encodeURIComponent var sForm1 = document.form1; sForm1.action = "<%=request.getContextPath()%>/com/icss/mdm/usermanual/servlet/StandardDocDownServlet"; sForm1.submit(); } </script> </head> <body> <div id="tableExcel"> <table id="tab"> <tr height="18" style="height: 13.5pt"> <td height="18" width="72" style="height: 13.5pt; width: 54pt">姓名</td> <td width="72" style="width: 54pt">性别</td> <td width="72" style="width: 54pt">年龄</td> </tr> <tr height="18" style="height: 13.5pt"> <td height="18" style="height: 13.5pt">杨xx</td> <td>男</td> <td align="right">27</td> </tr> <tr height="18" style="height: 13.5pt"> <td height="18" style="height: 13.5pt">测试1</td> <td>女</td> <td align="right">18</td> </tr> <tr height="18" style="height: 13.5pt"> <td height="18" style="height: 13.5pt">测试2</td> <td>女</td> <td align="right">18</td> </tr> <tr height="18" style="height: 13.5pt"> <td height="18" style="height: 13.5pt">测试3</td> <td>女</td> <td align="right">18</td> </tr> <tr height="18" style="height: 13.5pt"> <td height="18" style="height: 13.5pt">刘德华</td> <td>男</td> <td align="right">48</td> </tr> </table> </div> <a href="javascript:void(0)" onclick="toExecl()">导出execl</a> <a href="down.jsp">下载</a> </body> </html>
web.xml
<servlet> <servlet-name>toExecl</servlet-name> <servlet-class>com.mlxs.execl.servlet.ToExecl</servlet-class> </servlet> <servlet-mapping> <servlet-name>toExecl</servlet-name> <url-pattern>/toExecl</url-pattern> </servlet-mapping>
ToExeclServlet:
package com.mlxs.execl.servlet; import java.io.File; import java.io.FileInputStream; import java.io.IOException; import java.io.OutputStream; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import jxl.Workbook; import jxl.format.Alignment; import jxl.format.VerticalAlignment; import jxl.write.Label; import jxl.write.WritableCellFormat; import jxl.write.WritableFont; import jxl.write.WritableSheet; import jxl.write.WritableWorkbook; import jxl.write.WriteException; import jxl.write.biff.RowsExceededException; public class ToExecl extends HttpServlet{ @Override protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { this.doPost(req, resp); } @Override protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { req.setCharacterEncoding("UTF-8"); resp.setContentType("multipart/form-data"); resp.setHeader("Content-Disposition", "attachment;fileName=text.xls"); //处理前台传的数据 String dataStr = req.getParameter("jsonData"); dataStr = dataStr.replace("[{", "").replace("}]", "").replace("{", ""); String[] dataArr = dataStr.split("},"); try { //1.创建一个workbook(对应Excel文件 ) WritableWorkbook workbook = Workbook.createWorkbook(resp.getOutputStream()); //2.在workbook中添加一个sheet(Excel文件中的sheet) WritableSheet sheet = workbook.createSheet("导出数据", 0); //3.创建表头单元格，并设置文字格式 WritableFont wf = new WritableFont(WritableFont.ARIAL, 12, WritableFont.NO_BOLD); WritableCellFormat wcf = new WritableCellFormat(wf); wcf.setVerticalAlignment(VerticalAlignment.CENTRE); wcf.setAlignment(Alignment.CENTRE); //4.设置行数 sheet.setRowView(1, 100); //5.设置数据 for (int i = 0; i < dataArr.length; i++) { //每一行的数据 System.out.println("data:"+dataArr[i]); String[] str = dataArr[i].split(","); //每一列 for (int j = 0; j < str.length; j++) { if(i==0){ sheet.addCell(new Label(j, i, str[j], wcf));//new Label(列号, 行号, 数据, 单元格) continue; } sheet.addCell(new Label(j, i, str[j])); } } //6.end workbook.write(); workbook.close(); } catch (RowsExceededException e) { e.printStackTrace(); } catch (WriteException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } } }
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原文地址：http://www.cnblogs.com/yzlpersonal/p/5640972.html
