404 Not Found：出错了

Question

我在浏览器的地址栏中输入 localhost:8080/projectName/Myservlet，出现 404 错误。

Myservlet.java

package com.test.servlet;  

import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;

public class Myservlet extends HttpServlet{
    public void doGet(HttpServletRequest request,
        HttpServletResponse response) throws IOException{
        PrintWriter out=response.getWriter();

        out.println("<html><body><h1>Today</h1>Myservlet</body></html>");
    }
}

web.xml

<?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">
    <Servlet>
        <Servlet-name>servlet</Servlet-name>
        <Servlet-class>Myservlet</Servlet-class>
    </Servlet>

    <Servlet-mapping>
        <Servlet-name>servlet</Servlet-name>
        <url-pattern>/Myservlet</url-pattern>
    </Servlet-mapping>
</web-app>

Answer 1

在 web.xml 你没有定义 class:

的完整路径

<Servlet>
    <Servlet-name>servlet</Servlet-name>
    <Servlet-class>com.test.servlet.Myservlet</Servlet-class>
</Servlet>

<Servlet-mapping>
    <Servlet-name>servlet</Servlet-name>
    <url-pattern>/Myservlet</url-pattern>
</Servlet-mapping>

com.test.servlet是Myservlet的包名class。请使用 classes.

的完整路径

404 Not Found：出错了

404 Not Found: Something wrong

jsp

servlets

http-status-code-404