servlet_2

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后台处理逻辑
package com.fgy;

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;


@WebServlet("/header")
public class RequestHeaderServlet extends HttpServlet {
    private static final long serialVersionUID = 1L;


    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
//        response.getWriter().append("Served at: ").append(request.getContextPath());
        System.out.println(request.getMethod());
        System.out.println(request.getRequestURL());
        System.out.println(request.getRequestURI());
        System.out.println(request.getQueryString());
        System.out.println(request.getProtocol());
        
    }


    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        doGet(request, response);
    }

}

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访问地址
http://localhost:8080/project1/header?a
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控制台输出

GET
http://localhost:8080/project1/header
/project1/header
a
HTTP/1.1