用户列表Excel导出实例（POI）
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。