Response重定向

可以跳转页面

前端的代码（自己可以看到的）

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>Title</title>
</head>
<body>
<h2>hello  world</h2>
<%--前端写数据，由后台接受处理--%>

<form action="${pageContext.request.contextPath}/login" method="get">
    用户名:<input type="text" name="username"><br>
    密码:<input type="password" name="password"><br>
    <input type="submit">
</form>
</body>

后台的代码，操作执行

    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        resp.setContentType("text/html;charset=utf-8");
        //接收参数
        String username = req.getParameter("username");
        String password = req.getParameter("password");
        System.out.println(username+":"+password);
        //得到写的东西
        resp.getWriter().println("用户面："+username);
        resp.getWriter().println("密码"+password);
    }

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

<!--注册Servlet-->
    <servlet>
        <servlet-name>request</servlet-name>
        <servlet-class>controler.RequestTest</servlet-class>
    </servlet>
    <servlet-mapping>
        <servlet-name>request</servlet-name>
        <url-pattern>/login</url-pattern>
    </servlet-mapping>
	```