Servlet error : HTTP Status 405 - HTTP method GET is not supported by this URL

Question

当我尝试运行 eclipse 中的代码时，它不会传递参数。请查看下面的图片 url.

但是当我单独运行 html 代码时，它传递了值。

我不知道为什么会这样。我的 Servlet 代码是

package com.example;

import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class AddServelet extends HttpServlet
{

    public void services(HttpServletRequest req, HttpServletResponse resp) {

        int i = Integer.parseInt(req.getParameter("num1"));
        int j = Integer.parseInt(req.getParameter("num2"));

        int k = i+j;    
        System.out.println(k);  
    }
}

我的 web.xml 代码是

<?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_4_0.xsd" id="WebApp_ID" version="4.0">

<servlet>
<servlet-name>abc</servlet-name>
<servlet-class>com.example.AddServelet</servlet-class>
</servlet>

<servlet-mapping>
<servlet-name>abc</servlet-name>
<url-pattern>/add</url-pattern>
</servlet-mapping>

</web-app>

我的html代码

<html>
<body>
<form action="add">
Number 1: <input type="number" name="num1"><br>
Number 2: <input type="number" name="num2"><br>
<input type="submit">
</form>
</body>
</html>

谁能帮我解决这个问题。提前谢谢你。

Answer 1

如果您想处理 GET 请求，请覆盖 HttpServlet protected void doGet(HttpServletRequest req, HttpServletResponse resp) 方法

Answer 2

您需要覆盖 doPost 方法，因为您正在提交表单并且它是一个 post 请求。

public class AddServelet 扩展了 HttpServlet { private static final long serialVersionUID = 1L;

/**
 * @see HttpServlet#HttpServlet()
 */
public AddServelet() {
    super();
    // TODO Auto-generated constructor stub
}

/**
 * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
 */
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
    // TODO Auto-generated method stub

}

/**
 * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
 */
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
    // TODO Auto-generated method stub
    int i = Integer.parseInt(req.getParameter("num1"));
    int j = Integer.parseInt(req.getParameter("num2"));

    int k = i+j;    
    System.out.println(k); 
}

}

Servlet error : HTTP Status 405 - HTTP method GET is not supported by this URL

Servlet error : HTTP Status 405 - HTTP method GET is not supported by this URL

java

eclipse

servlets

runtime-error

http-error