【JSP开发】利用request获取各种值

request是JSP技术中中的一个常用API，继承自import javax.servlet.http.HttpServletRequest;

下面通过一个例子来看看request都能取出哪些值：

package cn.edu.Request;


import java.io.IOException;
import java.io.PrintWriter;


import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;


public class RequestDemo1 extends HttpServlet {


  public void doGet(HttpServletRequest request, HttpServletResponse response)
      throws ServletException, IOException {
       System.out.println(request.getRequestURI());
       System.out.println(request.getRequestURL());
       
       System.out.println(request.getQueryString());//返回参数信息（URL中带参）
       
       System.out.println(request.getRemoteAddr());//拿到来访者的IP地址
       System.out.println(request.getRemoteHost());//拿到来访者的完整主机名
       
       System.out.println(request.getRemotePort());//拿到来访者所使用的网络端口号
       
       System.out.println(request.getMethod());//拿到客户端的请求方式
  }


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


}