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源自：1-3 手工编写第一个Servlet

500错误

<%@ page language="java" contentType="text/html; charset=UTF-8"

    pageEncoding="UTF-8"%>

<!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=UTF-8">

<title>Insert title here</title>

</head>

<body>

<body>

<h1>

第一个Servlet小例子

</h1>

<a href="servlet/HelloServlet">Get方式请求HelloServlet</a>

</body>

</html>





package servlet;


import java.io.IOException;

import java.io.PrintWriter;


import javax.servlet.ServletException;

import javax.servlet.http.HttpServlet;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;


public class HelloServlet extends HttpServlet {


@Override

protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

// TODO Auto-generated method stub

System.out.println("处理get()方法。。。");

PrintWriter out =response.getWriter();

out.println("<strong>Hello Servlet!</strong><br>");

}


@Override

protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

// TODO Auto-generated method stub

System.out.println("处理post()方法。。。");

PrintWriter out =response.getWriter();

response.setContentType("text/html; charset=UTF-8");

out.println("<strong>Hello Servlet!</strong><br>"); }


}





<?xml version="1.0" encoding="UTF-8"?>

<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0">

  <display-name>MyFirstServlet</display-name>

  <welcome-file-list>

    <welcome-file>index.html</welcome-file>

    <welcome-file>index.htm</welcome-file>

    <welcome-file>index.jsp</welcome-file>

    <welcome-file>default.html</welcome-file>

    <welcome-file>default.htm</welcome-file>

    <welcome-file>default.jsp</welcome-file>

  </welcome-file-list>

  

  

  <servlet>

  <servlet-name>HelloServlet</servlet-name>

  <servlet-class>servlet.HelloServtet</servlet-class>

  </servlet>

  <servlet-mapping>

  <servlet-name>HelloServlet</servlet-name>

  <url-pattern>/servlet/HelloServlet</url-pattern>

  </servlet-mapping>

</web-app>

http://img.mukewang.com/5781e0530001e21a09040620.jpg



求解决


提问者：qq_是狼何必装羊__0 2016-07-10 13:43

个回答

  • qq__18
    2016-07-10 17:23:26
    已采纳

    <servlet-class>servlet.HelloServtet</servlet-class>

    web.xml 配置文件里类名写错了。

    0
  • 连宏伟HW
    2016-07-14 18:41:17

    <servlet>

      <servlet-name>HelloServlet</servlet-name>

      <servlet-class>servlet.HelloServtet</servlet-class>   这里错了看清楚类名

      </servlet>

      <servlet-mapping>

      <servlet-name>HelloServlet</servlet-name>

      <url-pattern>/servlet/HelloServlet</url-pattern>  这里错了

      </servlet-mapping>


    0