Controller方法形参接收checkbox的值，既可以用String，也可以用String[]。
字符串数组接收的测试代码如下：
@Controller
@RequestMapping("/mycontroller")
public class MyController {
@RequestMapping(method = RequestMethod.GET)
public String form() {
return "mycontroller";
}
@RequestMapping(method = RequestMethod.POST)
public String form1(@RequestParam("interest") String[] interest, Model model) {
String a = Arrays.toString(interest);
model.addAttribute("ins", a);
return "ok";
}
}
测试页面如下：
/WEB-INF/jsp/mycontroller.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/fmt" prefix="fmt"%>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>请选择</title>
</head>
<body>
<form action="${pageContext.request.contextPath }/mycontroller.action"
method="post">
<input type="checkbox" name="interest" value="a1" />a1<br />
<input type="checkbox" name="interest" value="a2" />a2<br />
<input type="checkbox" name="interest" value="a3" />a3<br />
<input type="checkbox" name="interest" value="a4" />a4<br />
<input type="checkbox" name="interest" value="a5" />a5<br />
<input type="submit"/>
</form>
</body>
</html>
结果显示页面如下：
/WEB-INF/jsp/ok.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/fmt" prefix="fmt"%>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>操作成功</title>
</head>
<body>
选择的内容是：${ins}<br/>
</body>
</html>
结果：
字符串接收的测试代码如下（测试完数组接收后 修改即可）：
@Controller
@RequestMapping("/mycontroller")
public class MyController {
@RequestMapping(method = RequestMethod.GET)
public String form() {
return "mycontroller";
}
@RequestMapping(method = RequestMethod.POST)
public String form1(@RequestParam("interest") String interest, Model model) {
model.addAttribute("ins", interest);
return "ok";
}
}
结果是：
小知识：
如果checkbox都留空（不选择），那么Controller会报错。解决办法：①前端js判断；②前端加一个hidden的checkbox。
补充方法：
@RequestParam(value = "interest", required = false)