根据要求完成表单以及使用servlet处理表单任务要求掌握Servlet输出表单和接收表单数据（多值组件的读取）。

Servlet代码:

package com.test;

import java.io.IOException;
import java.io.PrintWriter;
import java.util.Arrays;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

@WebServlet(urlPatterns = { "/Test2" })
public class Test2 extends HttpServlet {

    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp)
            throws ServletException, IOException {
        // TODO 自动生成的方法存根
        req.setCharacterEncoding("gbk");
        resp.setContentType("text/html;charset=utf-8");
        PrintWriter out = resp.getWriter();
        String user = req.getParameter("user");
        String email = req.getParameter("email");
        String age = req.getParameter("age");
        String time = req.getParameter("time");
        String[] language = req.getParameterValues("language");
        String jianyi = req.getParameter("jianyi");
        out.println("<h1>用户输入的信息:</h1>");
        out.println("用户名:" + user);
        out.println("<br>用户邮箱:" + email);
        out.println("<br>用户年龄:" + age);
        out.println("<br>编程时间:" + time);
        out.println("<br>编程语言:" + Arrays.toString(language));
        out.print("<br>用户建议:" + jianyi);
    }

    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp)
            throws ServletException, IOException {
        // TODO 自动生成的方法存根
        doPost(req, resp);
    }

}

html代码:

<!DOCTYPE html>
<html>

<head>
<title>Html2.html</title>

<meta name="keywords" content="keyword1,keyword2,keyword3">
<meta name="description" content="this is my page">
<meta name="content-type" content="text/html; charset=gbk">
<script type="text/javascript"></script>
<style>
#home {
    width: 400px;
    height: 500px;
    background-color: #FFE4C4;
    padding-left: 10px;
    padding-top: 20px;
}

.dl1 {
    clear: both;
}

.dl1 dt {
    float: left;
    height: 30px;
    line-height: 30px;
}

.dl1 dd {
    float: left;
    height: 30px;
    line-height: 30px;
}

#head {
    height: 320px;
}

#foot {
    text-align: center;
}
</style>
</head>

<body>
    <h1>潜在用户网络调查</h1>
    <div id="home">
        <form action="Test2" method="post">
            <div id="head">
                <dl class="dl1">
                    <dt>姓名:</dt>
                    <dd>
                        <input type="text" name="user" />
                    </dd>
                </dl>
                <dl class="dl1">
                    <dt>邮箱:</dt>
                    <dd>
                        <input type="text" name="email" />
                    </dd>
                </dl>
                <dl class="dl1">
                    <dt>年龄:</dt>
                    <dd>
                        <input type="radio" name="age" id="age1" value="小于18"
                            checked="checked" /><label for="age1">小于18</label> <input
                            type="radio" name="age" id="age2" value="18-25" /><label
                            for="age2">18-25</label> <input type="radio" name="age" id="age3"
                            value="26-40" /><label for="age3">26-40</label> <input
                            type="radio" name="age" id="age4" value="大于40" /><label
                            for="age4">大于40</label>
                    </dd>
                </dl>
                <dl class="dl1">
                    <dt>编程时间:</dt>
                    <dd>
                        <select name="time">
                            <option>不编程</option>
                            <option value="1年以下">1年以下</option>
                            <option value="1-2年">1-2年</option>
                            <option value="2-5年">2-5年</option>
                            <option value="5年以上">5年以上</option>
                        </select>
                    </dd>
                </dl>
                <dl class="dl1">
                    <dt>使用的编程语言:</dt>
                    <dd>
                        <input type="checkbox" name="language" id="language1" value="C" /><label
                            for="language1">C</label> <input type="checkbox" name="language"
                            id="language2" value="C++" /><label for="language2">C++</label>
                        <input type="checkbox" name="language" id="language3" value="C#" /><label
                            for="language3">C#</label> <input type="checkbox" name="language"
                            id="language4" value="JAVA" /><label for="language4">JAVA</label>
                        <input type="checkbox" name="language" id="language5" value="VB" /><label
                            for="language5">VB</label>
                    </dd>
                </dl>
                <dl class="dl1">
                    <dt>建议:</dt>
                    <dd>
                        <textarea name="jianyi" rows="10" cols="30" name="jianyi">输入建议...</textarea>
                    </dd>
                </dl>
            </div>
            <div id="foot">
                <input type="submit" value="提交" /> <input type="reset" value="重置" />
            </div>
        </form>
    </div>
</body>

</html>

运行截图:

遇到问题:

1.显示用户输入信息页面，Servlet输出的汉字乱码

解决方案:将Servlet代码和Html中的编码格式都改为GBK

Servlet:

req.setCharacterEncoding("gbk");

Html:

<meta name="content-type" content="text/html; charset=gbk">

根据要求完成表单以及使用servlet处理表单 任务要求 掌握Servlet输出表单和接收表单数据（多值组件的读取）。

根据要求完成表单以及使用servlet处理表单任务要求掌握Servlet输出表单和接收表单数据（多值组件的读取）。