Servlet实例创建

 

1.创建一个Servlet实例

 

2.HelloServlet.java 的代码

package com.servlet;

import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * Servlet implementation class HelloServlet
 */
@WebServlet("/HelloServlet")
public class HelloServlet extends HttpServlet {
	private static final long serialVersionUID = 1L;
       
    /**
     * @see HttpServlet#HttpServlet()
     */
    public HelloServlet() {
        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
		response.getWriter().append("Served at: ").append(request.getContextPath());
		response.getWriter().write("HelloServlet");
	}

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

}
}

3.web.xml的配置

<servlet>  
    <!-- 类名 -->  
    <servlet-name>HelloServlet</servlet-name>  
    <!-- 所在的包 -->  
    <servlet-class>com.servlet.HelloServlet</servlet-class>  
  </servlet>  
  <servlet-mapping>  
    <servlet-name>HelloServlet</servlet-name>  
    <!-- 访问的网址 -->  
    <url-pattern>/HelloServlet</url-pattern>  
  </servlet-mapping>