据我所知 Java 导 Excel 报表有三种方法:
1, 在 Servlet 直接向客户端输出制表符,如下:
PrintWriter out = response.getWriter();
out.println("xxxx\t");
out.flush();
out.close();
这种方法最原始, 编起来最麻烦.
2, 利用JSP模板, 下面详述具体实现, 这种方式需要先利用office软件先生成Html模板,然后将其转化为JSP页面, 不依赖第三方实现, 比较轻量级, 适合简单应用.
3, 第三方库, jxl.jar, 这种方式最灵活,网上文章也多,不再赘述.
Struts 配置文件:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts-config PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 1.3//EN" "http://struts.apache.org/dtds/struts-config_1_3.dtd">
<struts-config>
<form-beans />
<global-exceptions />
<global-forwards />
<action-mappings >
<action
path="/exportExcel"
type="com.mypack.struts.action.ExportExcelAction"
cancellable="true">
<forward name="downloadPage" path="/jsp/downloadPage.jsp" />
</action>
</action-mappings>
<message-resources parameter="com.mypack.struts.ApplicationResources" />
</struts-config>
Action实现:
/*
* Generated by MyEclipse Struts
* Template path: templates/java/JavaClass.vtl
*/
package com.mypack.struts.action;
import java.util.ArrayList;
import java.util.List;
import java.util.UUID;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
/**
* MyEclipse Struts
* Creation date: 11-07-2010
*
* XDoclet definition:
* @struts.action validate="true"
*/
public class ExportExcelAction extends Action {
@Override
public ActionForward execute(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response)
throws Exception {
List list = new ArrayList();
for (int i = 0; i < 100; i ++) {
list.add(UUID.randomUUID().toString());
}
request.setAttribute("result", list);
System.out.println(list);
response.setContentType("application/vnd.ms-excel;charset=UTF-8");
//response.setHeader("Content-Disposition" ,"attachment;filename=report");
response.setHeader ("Content-Disposition","attachment;filename="+ UUID.randomUUID() +".xls");
return mapping.findForward("downloadPage");
}
}
JSP 报表页面:
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<html xmlns:o="urn:schemas-microsoft-com:office:office"
xmlns:x="urn:schemas-microsoft-com:office:excel"
xmlns="http://www.w3.org/TR/REC-html40">
<head>
<meta http-equiv=Content-Type content="text/html; charset=gb2312">
<meta name=ProgId content=Excel.Sheet>
<meta name=Generator content="Microsoft Excel 11">
<link rel=File-List href="Book2.files/filelist.xml">
<link rel=Edit-Time-Data href="Book2.files/editdata.mso">
<link rel=OLE-Object-Data href="Book2.files/oledata.mso">
<!--[if gte mso 9]><xml>
<o:DocumentProperties>
<o:Author>微软用户</o:Author>
<o:LastAuthor>微软用户</o:LastAuthor>
<o:Created>2010-11-07T08:34:34Z</o:Created>
<o:LastSaved>2010-11-07T08:38:14Z</o:LastSaved>
<o:Company>微软中国</o:Company>
<o:Version>11.9999</o:Version>
</o:DocumentProperties>
</xml><![endif]-->
<style>
<!--table
{mso-displayed-decimal-separator:"\.";
mso-displayed-thousand-separator:"\,";}
@page
{margin:1.0in .75in 1.0in .75in;
mso-header-margin:.5in;
mso-footer-margin:.5in;}
tr
{mso-height-source:auto;
mso-ruby-visibility:none;}
col
{mso-width-source:auto;
mso-ruby-visibility:none;}
br
{mso-data-placement:same-cell;}
.style0
{mso-number-format:General;
text-align:general;
vertical-align:middle;
white-space:nowrap;
mso-rotate:0;
mso-background-source:auto;
mso-pattern:auto;
color:windowtext;
font-size:12.0pt;
font-weight:400;
font-style:normal;
text-decoration:none;
font-family:宋体;
mso-generic-font-family:auto;
mso-font-charset:134;
border:none;
mso-protection:locked visible;
mso-style-name:常规;
mso-style-id:0;}
td
{mso-style-parent:style0;
padding-top:1px;
padding-right:1px;
padding-left:1px;
mso-ignore:padding;
color:windowtext;
font-size:12.0pt;
font-weight:400;
font-style:normal;
text-decoration:none;
font-family:宋体;
mso-generic-font-family:auto;
mso-font-charset:134;
mso-number-format:General;
text-align:general;
vertical-align:middle;
border:none;
mso-background-source:auto;
mso-pattern:auto;
mso-protection:locked visible;
white-space:nowrap;
mso-rotate:0;}
ruby
{ruby-align:left;}
rt
{color:windowtext;
font-size:9.0pt;
font-weight:400;
font-style:normal;
text-decoration:none;
font-family:宋体;
mso-generic-font-family:auto;
mso-font-charset:134;
mso-char-type:none;
display:none;}
-->
</style>
<!--[if gte mso 9]><xml>
<x:ExcelWorkbook>
<x:ExcelWorksheets>
<x:ExcelWorksheet>
<x:Name>Sheet1</x:Name>
<x:WorksheetOptions>
<x:DefaultRowHeight>285</x:DefaultRowHeight>
<x:Selected/>
<x:Panes>
<x:Pane>
<x:Number>3</x:Number>
<x:ActiveRow>6</x:ActiveRow>
<x:ActiveCol>1</x:ActiveCol>
</x:Pane>
</x:Panes>
<x:ProtectContents>False</x:ProtectContents>
<x:ProtectObjects>False</x:ProtectObjects>
<x:ProtectScenarios>False</x:ProtectScenarios>
</x:WorksheetOptions>
</x:ExcelWorksheet>
<x:ExcelWorksheet>
<x:Name>Sheet2</x:Name>
<x:WorksheetOptions>
<x:DefaultRowHeight>285</x:DefaultRowHeight>
<x:ProtectContents>False</x:ProtectContents>
<x:ProtectObjects>False</x:ProtectObjects>
<x:ProtectScenarios>False</x:ProtectScenarios>
</x:WorksheetOptions>
</x:ExcelWorksheet>
<x:ExcelWorksheet>
<x:Name>Sheet3</x:Name>
<x:WorksheetOptions>
<x:DefaultRowHeight>285</x:DefaultRowHeight>
<x:ProtectContents>False</x:ProtectContents>
<x:ProtectObjects>False</x:ProtectObjects>
<x:ProtectScenarios>False</x:ProtectScenarios>
</x:WorksheetOptions>
</x:ExcelWorksheet>
</x:ExcelWorksheets>
<x:WindowHeight>9585</x:WindowHeight>
<x:WindowWidth>18195</x:WindowWidth>
<x:WindowTopX>480</x:WindowTopX>
<x:WindowTopY>105</x:WindowTopY>
<x:ProtectStructure>False</x:ProtectStructure>
<x:ProtectWindows>False</x:ProtectWindows>
</x:ExcelWorkbook>
</xml><![endif]-->
</head>
<body link=blue vlink=purple>
<table x:str border=0 cellpadding=0 cellspacing=0 width=368 style='border-collapse:
collapse;table-layout:fixed;width:276pt'>
<col width=368 style='mso-width-source:userset;mso-width-alt:11776;width:276pt'>
<tr height=19 style='height:14.25pt'>
<td height=19 width=368 style='height:14.25pt;width:276pt'>RandomUUID</td>
</tr>
<c:forEach items="${result}" var="r">
<tr height=19 style='height:14.25pt'>
<td height=19 style='height:14.25pt'>${r}</td>
</tr>
</c:forEach>
<![if supportMisalignedColumns]>
<tr height=0 style='display:none'>
<td width=368 style='width:276pt'></td>
</tr>
<![endif]>
</table>
</body>
</html>
系统下载页面:
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">
<title>My JSP 'index.jsp' starting page</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->
<script type="text/javascript" src="/excel/js/jquery-1.3.2.min.js"></script>
</head>
<body>
<input id="b" type="button" value="导 出 报 表" onclick="exportExcel();">
<a href="/excel/exportExcel.do" target="downloadf">导 出 报 表</a>
<div id="res"></div>
<iframe name="downloadf" style="display:none;">
1111111111
</iframe>
</body>
<script type="text/javascript">
function exportExcel() {
window.open("/excel/exportExcel.do","a1")
//pic.document.execCommand("SaveAs")
return;
$.get("/excel/exportExcel.do", function(data) {
alert(data);
});
}
</script>
</html>