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request应用及问题

模拟登录

public class LoginServlet extends HttpServlet {
    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        req.setCharacterEncoding("utf-8");
        resp.setCharacterEncoding("utf-8");
        String username = req.getParameter("username");
        String pwd = req.getParameter("pwd");
        //getParameterValues可以接受一个数组可以遍历取出也可增强for（前端复选项）
        String[] hobbies = req.getParameterValues("hobbies");

        System.out.println("======================");
        System.out.println(username);
        System.out.println(pwd);
        //后台接收中文乱码问题
        System.out.println(Arrays.toString(hobbies));
        System.out.println("======================");
        //通过请求转发
        // 这里的/代表当天的web应用
        req.getRequestDispatcher("/success.jsp").forward(req, resp);

    }

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


jsp代码
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>登录</title>
</head>
<body>
<h1>登录</h1>
<div style="text-align: center">
    <form action="${pageContext.request.contextPath}/login" method="post">
        用户名：<input type="text" name="username"/><br/>
        密码：<input type="password" name="pwd"/><br/>
        爱好：
        <input type="checkbox" name="hobbies" value="看电影"/>看电影
        <input type="checkbox" name="hobbies" value="阅读"/>阅读
        <input type="checkbox" name="hobbies" value="爬山"/>爬山
        <input type="checkbox" name="hobbies" value="摄影"/>摄影
        <br/>
        <input type="submit"/>
    </form>
</div>

</body>
</html>
posted @ 2022-03-04 01:01  Cn_FallTime  阅读(18)  评论(0)  编辑  收藏  举报