Servlet获取请求参数

配置html表单文件

<form action="http://localhost:8088/07_Servlet/parameterServlet" method="get">

    用户账号：<input type="text" name="username"><br/>
    密&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;码：<input type="password" name="password"><br/>
    兴趣爱好：<input type="checkbox" name="hobby" value="java">Java
    <input type="checkbox" name="hobby" value="C++">C++
    <input type="checkbox" name="hobby" value="html">Html<br/>
    <input type="submit">
    
</form>

重写doGet方法

protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        String username = req.getParameter("username");
        String password = req.getParameter("password");
        String hobby = req.getParameter("hobby");
        System.out.println("用户名：" + username);
        System.out.println("密码：" + password);
        System.out.println("兴趣爱好：" + hobby);
    }

输出结果：


因为勾选多个值
getParameter只能获取单个值
.
.
改用getParameterValues


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解决post中文乱码问题