HTTP状态500-Servlet执行引发异常(java.lang.ClassNotFoundException) [英] HTTP Status 500 - Servlet execution threw an exception (java.lang.ClassNotFoundException)
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问题描述
我一直在找不到此资源错误，并且无法弄清楚我的代码有什么问题.这是我的代码.
I have been getting this resource not found error and I'm not able to figure out whats wrong with my code. Here is my code.
TwitterServlet.java:
TwitterServlet.java:
package com.dhruvil.jsw;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import twitter4j.Status;
import twitter4j.Twitter;
import twitter4j.TwitterException;
import twitter4j.TwitterFactory;
import twitter4j.auth.AccessToken;
public class TwitterServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
public TwitterServlet() {
super();
}
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
String CONSUMER_KEY = "xxx";
request.setCharacterEncoding("UTF-8");
String CONSUMER_KEY_SECRET = "xxx";
String AccessToken = "xxx";
String AccessTokenSecret = "xxx";
response.setContentType("text/html");
response.setContentType("application/PDF");
String input1 = request.getParameter("first");
System.out.println(input1);
if (input1 == null || input1.trim().length() == 0) {
input1 = "You didn't enter any text.";
}
XSSFWorkbook workbook = new XSSFWorkbook();
XSSFSheet sheet = workbook.createSheet("Twitter Sheet");
try{
Twitter twitter = new TwitterFactory().getInstance();
twitter.setOAuthConsumer(CONSUMER_KEY, CONSUMER_KEY_SECRET);
AccessToken oathAccessToken = new AccessToken(AccessToken, AccessTokenSecret);
twitter.setOAuthAccessToken(oathAccessToken);
List<Status> status = twitter.getUserTimeline(input1);
List<String> tweets = new ArrayList<String>();
for (Status status2 : status)
{
tweets.add(status2.getText());
System.out.println("---Tweet---"+status2.getText());
}
WriteExcel.writeExcel(tweets, "Tweets.xls");
}catch (TwitterException te){
System.out.println("Error occured "+te);
}
System.out.println("Tweets Retrieved");
super.doPost(request, response);
}
}
WriteExcel.java:
WriteExcel.java:
package com.dhruvil.jsw;
import java.io.FileOutputStream;
import java.util.List;
import org.apache.poi.hssf.usermodel.HSSFRow;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
public class WriteExcel
{
public static void main(String[] args)
{
}
public static void writeExcel(List<String> data, String fileName)
{
try
{
HSSFWorkbook workbook = new HSSFWorkbook();
HSSFSheet sheet = workbook.createSheet("Sheet1");
HSSFRow rowhead = sheet.createRow((short) 0);
rowhead.createCell((short) 0).setCellValue("CellHeadName1");
rowhead.createCell((short) 1).setCellValue("CellHeadName2");
rowhead.createCell((short) 2).setCellValue("CellHeadName3");
int i = 1;
for (String dataRow : data)
{
HSSFRow row = sheet.createRow((short) i);
row.createCell((short) 0).setCellValue(dataRow);
i++;
}
String yemi = "e:/"+fileName;
FileOutputStream fileOut = new FileOutputStream(yemi);
workbook.write(fileOut);
fileOut.close();
}
catch (Exception e1)
{
e1.printStackTrace();
}
}
}
index.jsp:
index.jsp:
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<!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=ISO-8859-1">
<title>Insert title here</title>
</head>
<body>
<form action="TwitterServlet" method="get">
Enter Twitter Search Details : <input type="text" name="first"><br>
<input type="submit">
</form>
</body>
</html>
web.xml:
<?xml version="1.0" encoding="UTF-8"?>
<web-app id="WebApp_ID" version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
<display-name>
Twitter17</display-name>
<servlet>
<description>
</description>
<display-name>
TwitterServlet</display-name>
<servlet-name>TwitterServlet</servlet-name>
<servlet-class>
com.dhruvil.jsw.TwitterServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>TwitterServlet</servlet-name>
<url-pattern>/TwitterServlet</url-pattern>
</servlet-mapping>
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
错误:
HTTP状态500-Servlet执行引发异常
HTTP Status 500 - Servlet execution threw an exception
type Exception report
message Servlet execution threw an exception
description The server encountered an internal error that prevented it from fulfilling this request.
exception
javax.servlet.ServletException: Servlet execution threw an exception
root cause
java.lang.NoClassDefFoundError: org/openxmlformats/schemas/spreadsheetml/x2006/main/CTSheet
com.dhruvil.jsw.TwitterServlet.doGet(TwitterServlet.java:46)
javax.servlet.http.HttpServlet.service(HttpServlet.java:617)
javax.servlet.http.HttpServlet.service(HttpServlet.java:723)
root cause
java.lang.ClassNotFoundException: org.openxmlformats.schemas.spreadsheetml.x2006.main.CTSheet
org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1680)
org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1526)
com.dhruvil.jsw.TwitterServlet.doGet(TwitterServlet.java:46)
javax.servlet.http.HttpServlet.service(HttpServlet.java:617)
javax.servlet.http.HttpServlet.service(HttpServlet.java:723)
推荐答案
如果您使用的是pom.xml，请包括以下依赖项:
If you are using pom.xml, please include this dependency:
<dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi-ooxml-schemas</artifactId>
<version>3.10-FINAL</version>
</dependency>
或将此jar包含在您的类路径中:poi-ooxml-schemas-3.10-FINAL.jar
Or include this jar in your classpath : poi-ooxml-schemas-3.10-FINAL.jar
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