HttpServletRequest接口学习

最新推荐文章于 2025-03-05 18:45:49 发布

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最新推荐文章于 2025-03-05 18:45:49 发布 · 6.2k 阅读

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这篇博客详细介绍了`HttpServletRequest`接口在Java Web开发中的使用，包括获取请求信息如会话、URL、方法、头信息、Cookie等的方法，展示了如何通过示例代码进行操作。

package com.hongdian;

import java.util.Enumeration;
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpSession;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 *
 * @author yjmao
 * @描述 HttpServletRequest接口学习
 * @继承于 ServletRequest
 */
@WebServlet(name = "SpanningTreeServlet", urlPatterns = {"/SpanningTreeServlet.html"})
public class HttpServletRequestLearn extends HttpServlet {

    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        //authType(request);
        //getContextPath(request); 
        //getCookies(request);
        //getDateHeader(request);
        //getHeader(request);
        //getHeaderNames(request);
        //getHeaders(request);
        //getIntHeader(request);
        //getMethod(request);
        //getPathInfo(request); 
        //getPathTranslated(request); 
        //getQueryString(request); 
        //getRemoteUser(request); 
        //getRequestedSessionId(request); 
        //getRequestURI(request);
        //getRequestURL(request); 
        //getServletPath(request);
        //getSession(request);
        //getSessionBollean(request);
        //getUserPrincipal(request);
        //isRequestedSessionIdFromCookie(request); 
        //isRequestedSessionIdFromUrl(request) 
        //isRequestedSessionIdFromURL(request);
        //isRequestedSessionIdValid(request) ;
        //isUserInRole(request); 
        System.err.println("GET进来啦！");
    }
    
    
     /*
     * isRequestedSessionIdFromURL():返回一个布尔值，表示经过身份验证的用户是否包含在指定的逻辑“角色”。
     *       
     */
    public static void isUserInRole(HttpServletRequest request) {
        Boolean isUserInRole = request.isUserInRole("mao");
        System.out.println("isUserInRole = " + isUserInRole);
    }
     /*
     * isRequestedSessionIdFromURL():检查请求的会话ID是否仍然有效。
     *       
     */
    public static void isRequ