servlet请求对象获取各种路径的方法

原创于 2023-04-01 05:10:57 发布 · 843 阅读

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#servlet #java #开发语言

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该代码示例展示了如何在Servlet中处理HTTP请求，包括获取上下文路径、Servlet映射路径、客户端IP、请求参数、请求URI和URL等信息。

package com.itheima.servlet;

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

@WebServlet("/servletDemo01")
public class ServletDemo01 extends HttpServlet {
    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        /*1.获取虚拟目录名称*/
        String contextPath = req.getContextPath();
        System.out.println(contextPath);
        //2。获取servlet映射路径
        String servletPath = req.getServletPath();
        System.out.println(servletPath);

        //3.获取访问者IP
        String ip = req.getRemoteAddr();
        System.out.println(ip);

        //4.获取请求消息数据
        String queryString = req.getQueryString();
        System.out.println(queryString);

        //5.获取统一资源标识符 /request/servletDemo01
        String requestURI = req.getRequestURI();
        System.out.println(requestURI);

        //6.获取统一资源定位符 http://localhost:8080/request/servletDemo01
        StringBuffer requestURL = req.getRequestURL();
        System.out.println(requestURL);

    }

    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        doGet(req,resp);
    }
}