Servlet request常用方法

Servlet request常用方法

方法名	作用
req.getRemoteAddr	获取客户端IP地址
req.getLocalAddr()	获取服务器IP地址
req.getRemoteHost	获取客户端的主机名
req.getRemotePort	获取客户端的端口号
req.getLocalPort	获取服务器的端口号
req.getLocalName	获取服务器主机名
req.getContextPath	获取ContextPath
req.getServletPath()	获取ServletPath
req.getMethod	获取请求方式
req.getQueryString	获取请求的参数的值
req.getRequestURL	获取请求全路径

新建类Requests

继承HttpServlet并重写doGet方法

package com.szx.servlet;

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

public class Requests extends HttpServlet {
    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        System.out.println("客户端ip---------req.getRemoteAddr():"+req.getRemoteAddr());
        System.out.println("获取服务器ip------req.getLocalAddr():"+req.getLocalAddr());
        System.out.println("客户端主机名------req.getRemoteHost():"+req.getRemoteHost());
        System.out.println("客户端端口号------req.getRemotePort():"+req.getRemotePort());
        System.out.println("服务器主机名-------req.getLocalName():"+req.getLocalName());
        System.out.println("获取ContextPath--req.getContextPath():"+req.getContextPath());
        System.out.println("ServletPath()---req.getServletPath():"+req.getServletPath());
        System.out.println("请求方式----------req.getMethod():"+req.getMethod());
        System.out.println("请求的值----------req.getQueryString():"+req.getQueryString());
        System.out.println("请求全路径--------RequestURL():"+req.getRequestURL());
    }
}

配置web.xml文件

    <servlet>
        <servlet-name>Requests</servlet-name>
        <servlet-class>com.szx.servlet.Requests</servlet-class>
    </servlet>
    <servlet-mapping>
        <servlet-name>Requests</servlet-name>
        <url-pattern>/requests</url-pattern>
    </servlet-mapping>

开启服务并访问地址,查看结果

其中QueryString为null因为没有传入参数

添加请求参数查看结果