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用户列表Excel导出实例（POI）

2016-03-29 10:09 435 查看

1.jsp页面

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@ taglib prefix="s" uri="/struts-tags"%>
<html>
<head>
<title>用户管理</title>
<%@include file="/common/header.jsp" %>
<script type="text/javascript">
//全选、全反选
function doSelectAll(){
// jquery 1.6 前
//$("input[name=selectedRow]").attr("checked", $("#selAll").is(":checked"));
//prop jquery 1.6+建议使用
$("input[name=selectedRow]").prop("checked", $("#selAll").is(":checked"));
}
//添加
function doAdd(){
document.forms[0].action="${basePath}nsfw/user_addUI.action";
document.forms[0].submit();
}
//编辑
function doEdit(id){
document.forms[0].action="${basePath}nsfw/user_editUI.action?user.id=" + id;
document.forms[0].submit();
}
//删除
function doDelete(id){
document.forms[0].action="${basePath}nsfw/user_delete.action?user.id=" + id;
document.forms[0].submit();
}
//多选删除
function doDeleteAll(){
document.forms[0].action="${basePath}nsfw/user_deleteSelected.action";
document.forms[0].submit();
}
//用户列表导出
function doExportExcel(){
window.open("${basePath}nsfw/user_exportExcel.action");
}
</script>
</head>
<body class="rightBody">
<form name="form1" action="" method="post" enctype="multipart/form-data">
<div class="p_d_1">
<div class="p_d_1_1">
<div class="content_info">
<div class="c_crumbs"><div><b></b><strong>用户管理</strong></div> </div>
<div class="search_art">
<li>
用户名：<s:textfield name="user.name" cssClass="s_text" id="userName"  cssStyle="width:160px;"/>
</li>
<li><input type="button" class="s_button" value="搜 索" onclick="doSearch()"/></li>
<li style="float:right;">
<input type="button" value="新增" class="s_button" onclick="doAdd()"/> 
<input type="button" value="删除" class="s_button" onclick="doDeleteAll()"/> 
<input type="button" value="导出" class="s_button" onclick="doExportExcel()"/> 
<input name="userExcel" type="file"/>
<input type="button" value="导入" class="s_button" onclick="doImportExcel()"/> 

</li>
</div>

<div class="t_list" style="margin:0px; border:0px none;">
<table width="100%" border="0">
<tr class="t_tit">
<td width="30" align="center"><input type="checkbox" id="selAll" onclick="doSelectAll()" /></td>
<td width="140" align="center">用户名</td>
<td width="140" align="center">帐号</td>
<td width="160" align="center">所属部门</td>
<td width="80" align="center">性别</td>
<td align="center">电子邮箱</td>
<td width="100" align="center">操作</td>
</tr>
<s:iterator value="userList" status="st">
<tr <s:if test="#st.odd">bgcolor="f8f8f8"</s:if> >
<td align="center"><input type="checkbox" name="selectedRow" value='<s:property value="id"/>'/></td>
<td align="center"><s:property value="name"/></td>
<td align="center"><s:property value="account"/></td>
<td align="center"><s:property value="dept"/></td>
<td align="center"><s:property value="gender?'男':'女'"/></td>
<td align="center"><s:property value="email"/></td>
<td align="center">
<a href="javascript:doEdit('<s:property value="id"/>')">编辑</a>
<a href="javascript:doDelete('<s:property value="id"/>')">删除</a>
</td>
</tr>
</s:iterator>
</table>
</div>
</div>
<div class="c_pate" style="margin-top: 5px;">
<table width="100%" class="pageDown" border="0" cellspacing="0"
cellpadding="0">
<tr>
<td align="right">
总共1条记录，当前第 1 页，共 1 页   
<a href="#">上一页</a>  <a href="#">下一页</a>
到 <input type="text" style="width: 30px;" onkeypress="if(event.keyCode == 13){doGoPage(this.value);}" min="1"
max="" value="1" />   
</td>
</tr>
</table>
</div>
</div>
</div>
</form>

</body>
</html>

2.控制器action的核心代码片段

//导出用户列表
public void exportExcel(){
try {
//1.查找用户列表
userList = userService.findObjects();
//2.导出
HttpServletResponse response = ServletActionContext.getResponse();
response.setContentType("application/x-excel");
response.setHeader("Content-Disposition", "attachment;filename=" + new String("用户列表.xls".getBytes(),"ISO-8859-1"));
ServletOutputStream outputStream = response.getOutputStream();
userService.exportExcel(userList,outputStream);
if(outputStream != null){
outputStream.close();
}
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}

3.业务测（service）代码

@Override
public void exportExcel(List<User> userList, ServletOutputStream outputStream) {
ExcelUtil.exportUserExcel(userList, outputStream);
}

4.抽取的业务层逻辑代码（抽取成静态的工具类，直接调用）

package cn.buaa.core.util;

import java.util.List;

import javax.servlet.ServletOutputStream;

import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFCellStyle;
import org.apache.poi.hssf.usermodel.HSSFFont;
import org.apache.poi.hssf.usermodel.HSSFRow;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.hssf.util.CellRangeAddress;

import cn.buaa.nsfw.user.entity.User;

public class ExcelUtil {

/**
* 用户列表导出
* @param userList 用户列表
* @param outputStream 输出流
*/
public static void exportUserExcel(List<User> userList, ServletOutputStream outputStream) {

try {
//1、创建工作簿
HSSFWorkbook workbook = new HSSFWorkbook();
//1.1、创建合并单元格对象
CellRangeAddress cellRangeAddress = new CellRangeAddress(0, 0, 0, 4);
//1.2、头标题样式
HSSFCellStyle style1 = createCellStyle(workbook,(short)16);
//1.3、列标题样式
HSSFCellStyle style2 = createCellStyle(workbook,(short)13);

//2、创建工作表
HSSFSheet sheet = workbook.createSheet("用户列表");
//2.1、加载合并单元格对象
sheet.addMergedRegion(cellRangeAddress);
//设置默认列宽
sheet.setDefaultColumnWidth(25);

//3、创建行
//3.1、创建头标题行；并且设置头标题
HSSFRow row1 = sheet.createRow(0);
HSSFCell cell1 = row1.createCell(0);
//加载单元格样式
cell1.setCellStyle(style1);
cell1.setCellValue("用户列表");
//3.2、创建列标题行；并且设置列标题
HSSFRow row2 = sheet.createRow(1);
String[] titles = {"用户名","账号","所属部门","性别","电子邮箱"};
for(int i = 0;i<titles.length;i++){
HSSFCell cell2 = row2.createCell(i);
//加载单元格样式
cell2.setCellStyle(style2);
cell2.setCellValue(titles[i]);
}

//4、操作单元格；将用户列表写入excel
if(userList != null){
for(int j = 0;j<userList.size();j++){
HSSFRow row = sheet.createRow(j+2);
HSSFCell cell11 = row.createCell(0);
cell11.setCellValue(userList.get(j).getName());
HSSFCell cell12 = row.createCell(1);
cell12.setCellValue(userList.get(j).getAccount());
HSSFCell cell13 = row.createCell(2);
cell13.setCellValue(userList.get(j).getDept());
HSSFCell cell14 = row.createCell(3);
cell14.setCellValue(userList.get(j).isGender() ? "男" : "女");
HSSFCell cell15 = row.createCell(4);
cell15.setCellValue(userList.get(j).getEmail());
}
}

//5、输出
workbook.write(outputStream);
workbook.close();
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}

/**
* 创建单元格样式
* @param workbook
* @param fontSize
* @return
*/
private static HSSFCellStyle createCellStyle(HSSFWorkbook workbook, short fontSize) {
HSSFCellStyle style = workbook.createCellStyle();
style.setAlignment(HSSFCellStyle.ALIGN_CENTER);  //水平居中
style.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);  //垂直居中
//创建字体
HSSFFont font = workbook.createFont();
font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD); //加粗字体
font.setFontHeightInPoints(fontSize);
//加载字体
style.setFont(font);
return style;
}
}

说明：导出的为通用型03版excel，做了行标题和列标题的单独处理，包括样式和字体等。

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