Java请求重定向笔记整理_python

请求重定向

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概念：大体得意思就是客户端发送给服务端一个请求，然后服务器告诉客户端这个地址废弃了（302），我给你别的地址你去访问别的吧

流程图如下

代码如下
response1

public class Response1 extends HttpServlet {
    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        System.out.println("哈哈哈我是Response1欧！！！");
        //设置响应状态码302 ，表示重定向
        resp.setStatus(302);
        //设置响应头，说明新的地址在哪里
        resp.setHeader("Location","http://localhost:8080/demo/response2");

    }
}

response2

public class Response2 extends HttpServlet {
    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        resp.getWriter().write("my name is response2!!!");
    }
}

web.xml

   <servlet>
        <servlet-name>Response1servlet-name>
        <servlet-class>com.example.demo.Response1servlet-class>
    servlet>
    <servlet-mapping>
        <servlet-name>Response1servlet-name>
        <url-pattern>/response1url-pattern>
    servlet-mapping>
    <servlet>
        <servlet-name>Response2servlet-name>
        <servlet-class>com.example.demo.Response2servlet-class>
    servlet>
    <servlet-mapping>
        <servlet-name>Response2servlet-name>
        <url-pattern>/response2url-pattern>
    servlet-mapping>