@Controller
@RequestMapping(value = "/custom/register")
public class RegistrationController {
// Set the data binding per controller
@InitBinder
public void initBinder(WebDataBinder binder){
binder.setDisallowedFields("id");
// 此处指定在绑定的时候存在两个必须字段
binder.setRequiredFields("userName","password");
}
// POST请求的时候将BindingResult的对象置于参数列表中。 BindingResult是<form: error> 这个tag的子类。
@RequestMapping(method = {RequestMethod.POST,RequestMethod.PUT})
public String handleRegistration(Account account, BindingResult result){
// 校验过程中如果存在error返回到本页，而且本页中有一个DataModel为Result
if(result.hasErrors())
return "custom/register"; accountService.SaveAccount(account);
return "redirect:custom/account/"+account.getId();
}
}
JSP文件中，在相应的控件处添加Error 标签，这样如果BindingResult不为空。这些Error 标签就会将提示信息显示出来
<%--
Created by IntelliJ IDEA.
User: Administrator
Date: 2015/4/6
Time: 22:16
To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@taglib prefix="spring" uri="http://www.springframework.org/tags" %>
<%@taglib prefix="form" uri="http://www.springframework.org/tags/form" %>
<html>
<head>
<title>Registration Page</title>
</head>
<body>
<form:form modelAttribute="account" method="post">
<fieldset>
<legend>
Account Personal Information
</legend>
<table>
<tr>
<td>FirstName</td>
<td>
<form:input path="firstName"></form:input>
</td> </tr>
<tr>
<td>LastName</td>
<td>
<form:input path="lastName"></form:input>
</td>
</tr> </table>
</fieldset>
<fieldset>
<legend>Account information</legend> <table>
<tr>
<td>User Name</td>
<td><form:input path="userName"></form:input></td>
<td><form:errors path="userName"></form:errors> </td>
</tr>
<tr>
<td><form:label path="password">Password</form:label></td>
<td><form:input path="password"></form:input></td>
<td><form:errors path="password"></form:errors> </td>
</tr> </table>
</fieldset> <form:button value="Submit">提交 </form:button>
</form:form>
</body>
</html>