麻烦老师看看，为什么我的导出功能无法实现？
以下是在index页面提示的错误信息：
HTTP Status 500 – Internal Server Error
Type Exception Report
Message Servlet execution threw an exception
Description The server encountered an unexpected condition that prevented it from fulfilling the request.
Exception
javax.servlet.ServletException: Servlet execution threw an exception
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)
Root Cause
java.lang.NoClassDefFoundError: org/apache/commons/compress/archivers/zip/ZipFile
org.apache.poi.openxml4j.opc.OPCPackage.create(OPCPackage.java:365)
org.apache.poi.xssf.usermodel.XSSFWorkbook.newPackage(XSSFWorkbook.java:495)
org.apache.poi.xssf.usermodel.XSSFWorkbook.<init>(XSSFWorkbook.java:261)
org.apache.poi.xssf.usermodel.XSSFWorkbook.<init>(XSSFWorkbook.java:257)
org.apache.poi.xssf.usermodel.XSSFWorkbook.<init>(XSSFWorkbook.java:245)
org.imooc.service.ExcelService.export(ExcelService.java:56)
org.imooc.servlet.ExportExcelServlet.doPost(ExportExcelServlet.java:18)
javax.servlet.http.HttpServlet.service(HttpServlet.java:660)
javax.servlet.http.HttpServlet.service(HttpServlet.java:741)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)
Root Cause
java.lang.ClassNotFoundException: org.apache.commons.compress.archivers.zip.ZipFile
org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1309)
org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1138)
org.apache.poi.openxml4j.opc.OPCPackage.create(OPCPackage.java:365)
org.apache.poi.xssf.usermodel.XSSFWorkbook.newPackage(XSSFWorkbook.java:495)
org.apache.poi.xssf.usermodel.XSSFWorkbook.<init>(XSSFWorkbook.java:261)
org.apache.poi.xssf.usermodel.XSSFWorkbook.<init>(XSSFWorkbook.java:257)
org.apache.poi.xssf.usermodel.XSSFWorkbook.<init>(XSSFWorkbook.java:245)
org.imooc.service.ExcelService.export(ExcelService.java:56)
org.imooc.servlet.ExportExcelServlet.doPost(ExportExcelServlet.java:18)
javax.servlet.http.HttpServlet.service(HttpServlet.java:660)
javax.servlet.http.HttpServlet.service(HttpServlet.java:741)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)
Note The full stack trace of the root cause is available in the server logs.
然后这是我exportExcel.jsp页面的代码。
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<meta http-equiv="X-UA-Compatible" content="IE=9; IE=8; IE=7; IE=EDGE" />
<title></title>
<link rel="stylesheet" type="text/css" href="css/all.css" />
<link rel="stylesheet" type="text/css" href="css/pop.css" />
<link rel="stylesheet" type="text/css" href="css/main.css" />
</head>
<body style="background: #e1e9eb;">
<form action="${basePath}/exportExcel" id="mainForm" method="post">
<div class="right">
<div class="current">
当前位置：<a href="#">导入/导出</a> > 导出Excel
</div>
<div class="rightCont">
<p class="g_title fix">导出Excel</p>
<table class="tab1">
<tbody>
<tr>
<td align="right" width="80">标题：</td>
<td width="280"><input id="title" value="" style="width: 100%;" class="allInput" type="text" /></td>
<td style="text-align: right;" width="150"><input class="tabSub" value="查询" onclick="" type="button" />
<input class="tabSub" value="导出" onclick="document.getElementById('mainForm').submit();" type="button" /></td>
</tr>
</tbody>
</table>
<div class="zixun fix">
<table class="tab2" width="100%">
<tbody>
<tr>
<th>序号</th>
<th>姓名</th>
<th>年龄</th>
<th>出生日期</th>
</tr>
<tr>
<td>1</td>
<td>张三</td>
<td>25</td>
<td>1990-09-01</td>
</tr>
<tr>
<td>2</td>
<td>李四</td>
<td>25</td>
<td>1990-09-01</td>
</tr>
<tr>
<td>3</td>
<td>王五</td>
<td>25</td>
<td>1990-09-01</td>
</tr>
</tbody>
</table>
</div>
</div>
</div>
</form>
</body>
</html>然后是Servlet
package org.imooc.servlet;
import org.apache.poi.ss.usermodel.Workbook;
import org.imooc.service.ExcelService;
import javax.servlet.ServletException;
import javax.servlet.ServletOutputStream;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
@WebServlet(name = "ExportExcelServlet")
public class ExportExcelServlet extends HttpServlet {
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
ExcelService service=new ExcelService();
Workbook workbook = service.export(true);
response.setHeader("Content-Disposition","attachment;filename=export.xlsx");
ServletOutputStream outputStream = response.getOutputStream();
//直接将文件输出提供下载导出
workbook.write(outputStream);
outputStream.flush();
outputStream.close();
workbook.close();
}
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
this.doPost(request, response);
}
}package org.imooc.servlet;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
public class ExportExcelInitServlet 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.getRequestDispatcher("/WEB-INF/jsp/exportExcel.jsp").forward(req,resp);
}
}下面的是ExcelService
package org.imooc.service;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.ss.usermodel.Workbook;
import org.apache.poi.ss.usermodel.WorkbookFactory;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.imooc.dto.ImportExcelParamDto;
import org.imooc.dto.ImportExcelResultDto;
import org.imooc.entity.Student;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
public class ExcelService {
public ImportExcelResultDto imp(ImportExcelParamDto dto){
ImportExcelResultDto result = new ImportExcelResultDto();
result.setTitle(dto.getTitle());
List<Student> studentList = new ArrayList<Student>();
result.setStudentList(studentList);
Workbook workbook = null;
try {
workbook = WorkbookFactory.create(dto.getExcel().getInputStream());
Sheet sheet = workbook.getSheetAt(0);
int rowNum = sheet.getLastRowNum();
for (int i = 1; i <= rowNum; i++) {
Row row = sheet.getRow(i);
Student student = new Student();
studentList.add(student);
student.setName(row.getCell(0).getStringCellValue());
student.setAge((int)row.getCell(1).getNumericCellValue());
student.setTime(row.getCell(2).getDateCellValue());
}
} catch (IOException e) {
e.printStackTrace();
result.setMsg("解析Excel失败");
}finally {
if (workbook!=null){
try {
workbook.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
return result;
}
public Workbook export(boolean isXlsx){
Workbook workbook;
if (isXlsx){
workbook = new XSSFWorkbook();
}else{
workbook = new HSSFWorkbook();
}
Sheet sheet = workbook.createSheet("My Sheet");
List<List<String>> content = this.getContent();
for (int i=0;i<content.size();i++){
Row row = sheet.createRow(i);
List<String> rowData = content.get(i);
for (int j = 0; j < rowData.size(); j++) {
row.createCell(j).setCellValue(rowData.get(j));
}
}
return workbook;
}
private List<List<String>> getContent() {
List<List<String>> result = new ArrayList<>();
List<String> row = new ArrayList<>();
result.add(row);
row.add("序号");
row.add("姓名");
row.add("年龄");
row.add("时间");
row = new ArrayList<>();
result.add(row);
row.add("1");
row.add("路人甲");
row.add("18");
row.add("2010-01-01");
row = new ArrayList<>();
result.add(row);
row.add("2");
row.add("路人乙");
row.add("19");
row.add("2010-01-02");
row = new ArrayList<>();
result.add(row);
row.add("3");
row.add("路人丙");
row.add("20");
row.add("2010-01-03");
return result;
}
}麻烦老师指点迷津……
正在回答
你好！我用你的代码替换了源代码中的代码，导出没有问题，你用的是老师源码中的POI jar包，还是其他版本的？
祝学习愉快！
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