Request 获取请求参数通用方式-CFANZ编程社区

html页面

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>注册页面</title>
</head>
<body>
<form action="/RequestDemo5" method="post">
    <input type="text" placeholder="请输入用户名" name="username"><br>
    <input type="text" placeholder="请输入密码" name="password"><br>
    <input type="submit" value="注册">
</form>
</body>
</html>

Servlet代码

@WebServlet("/RequestDemo5")
public class RequestDemo5 extends HttpServlet {
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

        // post 获取请求参数

        //根据参数名称获取参数值
        String username = request.getParameter("username");
        System.out.println("post");
        System.out.println(username);
    }

    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

        // get 获取请求参数
        this.doPost(request,response);
    }
}

启动

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结果
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