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16_Request_请求转发

发布时间：2022-08-11 22:19:11编辑：雪饮阅读（）

request请求转发是毛意思？

就是比如我访问路径/Movie，然后结果最后给我响应的是/Music的内容。

这里request请求转发，暂时只支持项目内部路由，比如你要转发到百度等非本项目（非本服务器）路由是不可行的。

Movie.java如：

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.BufferedReader;
import java.io.IOException;
import java.util.Enumeration;
import java.util.Map;
import java.util.Set;

@WebServlet("/Movie")
public class Movie extends HttpServlet {
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

    }

    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        System.out.println("Movie被访问");
       request.getRequestDispatcher("/Music").forward(request,response);
    }
}

然后这个Music.java如：

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("/Music")
 public class Music extends HttpServlet {
     protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
 
     }
 
     protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
         System.out.println("Music被访问");
     }
 }