eclipse - 此 URL 不支持具有简单 servlet 的 HTTP 方法 GET

Question

自 2 天以来，我一直在尝试解决这个问题，在 stackoverflow 上的许多帖子中都有相同的问题标题，但它们都是不同的，因为它们总是在代码中出错，但就我而言，我有一个示例servlet，当我运行项目时出现此错误

HTTP Status 405 - HTTP method GET is not supported by this URL this is my class servlet

    package web;

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 Controller extends HttpServlet{

    /**
     * 
     */
    private static final long serialVersionUID = 1L;

    @Override
    public void init() throws ServletException {

    }

    @Override
    protected void doGet(HttpServletRequest requet, HttpServletResponse response) throws ServletException, IOException {
        response.setContentType("text/html");
        response.setCharacterEncoding("UTF-8");
        PrintWriter out =response.getWriter();
        out.println("hello");
    }

}

和我的 web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" id="WebApp_ID" version="3.1">
  <display-name>test2</display-name>
  <servlet>
    <servlet-name>cs</servlet-name>
    <servlet-class>web.Controller</servlet-class>
  </servlet>
  <servlet-mapping>
    <servlet-name>cs</servlet-name>
    <url-pattern>/hello</url-pattern>
  </servlet-mapping>
</web-app>

请告诉我如何解决这个问题，谢谢......

Answer 1

简单的 doGet Servlet 或者您可以添加 try catch 博客来调试代码

import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;


public class logout extends HttpServlet 
{
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException 
    {

        try
        {
            PrintWriter out=response.getWriter();
            response.setContentType("text/html;charset=UTF-8");
            out.println("Hello");
        }

        catch(Exception e)
        {
            out.println(e.toString())
        }
    }
}