HttpServletRequest对象应用

HttpServletRequest代表客户端的请求，用户通过http协议访问服务器，http的所以信息会封装到HttpServletRequest中，通过这个HttpServletRequest的方法，获得客户端的信息。

 

1.用户登入信息获取


index.jsp代码

<html>
<body>

<form action="/Servlet01_war/req" method="get">
    用户名:<input type="text" name="username"><br>
    密码:<input type="password" name="password"><br>
    <input type="submit">
</form>

</body>
</html>

java代码

@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
   System.out.println("请求");
   String name =req.getParameter("username");
   String password=req.getParameter("password");
   System.out.println(name);
   System.out.println(password);
}

 

2.获取前端传递的参数

@Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
       System.out.println("请求");
       String name =req.getParameter("username");
       String password=req.getParameter("password");
       System.out.println(name);
       System.out.println(password);
    }
<html>
<body>

<form action="/Servlet01_war/req" method="get">
    用户名:<input type="text" name="username"><br>
    密码:<input type="password" name="password"><br>
    <input type="submit">
</form>

</body>
</html>

 3.请求转发

resp.sendRedirect("/Servlet01_war/success.jsp");

 

posted @ 2021-11-06 17:44  是小张呀qaq  阅读(45)  评论(0)    收藏  举报