获取请求数据 - 获取复选框数据 - 《JAVA学习》

req.getParameterValues(“checkboxkey”);
获取复选框(checkbox组件)中的值，返回一个字符串数组。

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8">
    <title>添加用户</title>
  </head>
  <body>
    <form action="getRequestDataServlet.do" method="post">
      用户名：<input type="text" name="username"/><br/>
      密码：<input type="password" name="userpwd"/><br/>
      爱好：<input type="checkbox" name="userlike" value="sport" />体育<br/>
      <input type="checkbox" name="userlike" value="Music" />音乐<br/>
      <input type="checkbox" name="userlike" value="art" />艺术<br/>
      <input type="submit" value="OK"/>
    </form>
  </body>
</html>

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.Arrays;
import java.util.List;
/**
 * 获取请求数据
 */
public class GetRequestDataServlet extends HttpServlet {
    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        //获取用户名
        String username = req.getParameter("username");
        //获取用户密码
        String pwd = req.getParameter("userpwd");
        //获取复选框的数据
        String[] userlike = req.getParameterValues("userlike");
        List<String> list = Arrays.asList(userlike);
        PrintWriter printWriter = resp.getWriter();
        printWriter.println(username);
        printWriter.println(pwd);
        printWriter.println(list);
        printWriter.flush();
        printWriter.close();
    }
}