问题描述：
有两个类：Record.java 和 User.java，Record中有个attenders属性，是List<User>类型。
我想绑定Record中的attenders。网上查了下，没有满意的结果，于是自己写了个简单的方法。
具体代码如下：
Record.java
public class Record { public List<User> getAttenders() { return attenders; } public void setAttenders(List<User> attenders) { this.attenders = attenders; } public int getRecordId() { return recordId; } public void setRecordId(int recordId) { this.recordId = recordId; } public String getRecordName() { return recordName; } public void setRecordName(String recordName) { this.recordName = recordName; } private List<User> attenders; private int recordId; private String recordName; }
User.java
public class User { public int getUserId() { return userId; } public void setUserId(int userId) { this.userId = userId; } public String getUserName() { return userName; } public void setUserName(String userName) { this.userName = userName; } private int userId; private String userName; }
MultiSelect.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %> <%@ taglib uri="http://www.springframework.org/tags/form" prefix="form"%> <title>main page</title> <script type="text/javascript" src="js/jquery-1.6.4.min.js"></script> <script type="text/javascript" src="js/jquery-ui-1.8.16.custom.min.js"></script> <script type="text/javascript"> function check(){ var index = 0; $.each( $(‘#attenderSelect :selected‘),function(){ var input = $(‘<input>‘); input.attr("name","attenders["+index+"].userId"); input.attr("type","hidden"); input.attr("value",$(this).val()); $(‘#attenderSelect‘).append(input); index ++; } ); } </script> </head> <body> <input name="" type="hidden" value=""> <form:form action="./user.htm?method=multiSelect" method="post"> <table> <tr> <td> <select id="attenderSelect" name="attenders.userId" multiple="multiple"> <c:forEach var="user" items="${userList }"> <option value="${user.userId}" >${user.userName }</option> </c:forEach> </select> </td> </tr> <tr> <td> <input type="text" name="recordName"> </td> </tr> <tr> <td> <input type="submit" value="submit" onclick="check()"> </td> </tr> </table> </form:form> </body> </html>
Controller method:
public class UserFormController extends MultiActionController { public ModelAndView multiSelect(HttpServletRequest request, HttpServletResponse response) throws Exception { Record record = (Record) newCommandObject(Record.class); bind(request,record); // if(record.getAttenders() != null) // for(User user : record.getAttenders()){ // System.out.println(user.getUserId()); // } ModelAndView mav = new ModelAndView("index"); return mav; }
}
通过在提交表单时，创建一些隐藏的 input ，并命名为 attenders[index].userId，这样就达到了将数据绑定到对象的目的了
Spring MVC 多选框 绑定 Entity 中的 list 属性
原文：http://www.cnblogs.com/zhujiabin/p/4916642.html