Spring中的DataBinding(二) - Validation

標籤：

@Controller
@RequestMapping(value = "/custom/register")
public class RegistrationController {

   // Set the data binding per controller    @InitBinder    public void initBinder(WebDataBinder binder){        binder.setDisallowedFields("id");
　　　　// 此處指定在綁定的時候存在兩個必須欄位        binder.setRequiredFields("userName","password");    }
    // POST請求的時候將BindingResult的對象置於參數列表中。 BindingResult是<form: error> 這個tag的子類。    @RequestMapping(method = {RequestMethod.POST,RequestMethod.PUT})    public String handleRegistration(Account account, BindingResult result){
　　　　　// 校正過程中如果存在error返回到本頁，而且本頁中有一個DataModel為Result        if(result.hasErrors())            return "custom/register";        accountService.SaveAccount(account);        return "redirect:custom/account/"+account.getId();    }
}

　

JSP檔案中，在相應的控制項處添加Error 標籤，這樣如果BindingResult不為空白。這些Error 標籤就會將提示資訊顯示出來

<%--  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>

　　

　

Spring中的DataBinding(二) - Validation