servlet获取jsp页面的复选框中的多个值
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>$Title$</title>
</head>
<body>
<form method="post" action="/Day04_war_exploded/Demo03Servlet">
账号： <input type="text" name="username"><br>
密码： <input type="text" name="password"><br>
爱好: <input type="checkbox" name="hobby" value="抽烟">抽烟
<input type="checkbox" name="hobby" value="喝酒">喝酒
<input type="checkbox" name="hobby" value="烫头">烫头
<input type="submit" value="提交">
</form>
</body>
</html>
servlet怎么获取多个爱好？
String[] hobbys = request.getParameterValues("hobby");
可以使用getParameterValues()方法，获取多个value值
这边前端勾选三个爱好:
后端servlet代码如下：
package com.lbl.servlet;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.util.Arrays;
@WebServlet("/Demo03Servlet")
public class Demo03Servlet extends HttpServlet {
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
doGet(request,response);
}
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
request.setCharacterEncoding("utf-8");
String[] hobbys = request.getParameterValues("hobby");
System.out.println(Arrays.toString(hobbys));
}
}
效果如下：
