request应用

  • HttpServletRequest代表客户端的请求
  • 用户通过Http协议访问服务器，http请求中的所有信息会被封装到HttpServletRequest
  • 通过HttpServletRequest的方法获得客户端的所有信息

获取前端传送的数据,请求转发

index.jsp

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>Title</title>
</head>
<body>


<h1>登录</h1>

<div style="text-align: center">
    <form action="${pageContext.request.contextPath}/login" method="post">
        用户名：<input name="username" type="text" ><br>
        密码：  <input name="password" type="password" ><br>
        爱好：
              <input name="hobby" type="checkbox" value="sleep">睡觉
              <input name="hobby" type="checkbox" value="sports">运动
              <input name="hobby" type="checkbox" value="sing">唱歌
        <input type="submit">
    </form>
</div>

</body>
</html>

LoginServlet

public class LoginServlet extends HttpServlet {
    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        String username = req.getParameter("username");
        String password = req.getParameter("password");
        String[] hobbies = req.getParameterValues("hobby");

        //请求转发
        req.getRequestDispatcher("/success.jsp").forward(req,resp);
    }

    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        doGet(req, resp);
    }
}
posted @ 2021-11-19 14:13  卡卡发  阅读(31)  评论(0)    收藏  举报