我在尝试执行简单的 servlet program.Is 时遇到错误，映射中缺少什么吗？

Question

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


<servlet>
<servlet-name>abc</servlet-name>
<servlet-class>com.skype.AddServlet</servlet-class>
</servlet>

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

</servlet-mapping>

</web-app>

AddServlet.java

package com.skype;

import java.io.IOException;
import java.io.PrintWriter;

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

public class AddServlet extends HttpServlet {

public void service(HttpServletRequest req,HttpServletResponse res ) throws IOException {
    
    int i= Integer.parseInt(req.getParameter("num1"));
    int j=Integer.parseInt(req.getParameter("num2"));
    
    int k= i+j;
    PrintWriter out=res.getWriter();
    out.println("result is"+k);
}

}

index.html

Getting an error:-The origin server did not find a current representation for the target resource or is not willing to disclose that one exists

<html>
<head>
<meta charset="ISO-8859-1">
<title>just adding</title>
</head>
<body>
<form action="add">

 Enter 1st number <input type="text" name=num1><br>
 Enter 2nd number <input type="text" name=num2><br>
<input type="submit">
</form>
</body>
</html>

出现错误：-源服务器未找到目标的当前表示资源或不愿意透露存在.

Answer 1

我们应该遵循使用 servlet 开发 Web 应用程序的文件夹结构，即 index.html 文件必须放在 WebContent 下文件夹不在 WEB-INF 文件夹内。

您可以查看下面的屏幕截图：

我在尝试执行简单的 servlet program.Is 时遇到错误，映射中缺少什么吗？

I am getting an error while trying to execute simple servlet program.Is there any thing missing in mapping?

java

servlets