Add a Jar Package
Bean-validator.jar
Adding validation annotation and message hints to entity classes
PackageCom.stone.model;Importjavax.validation.constraints.Size;ImportOrg.hibernate.validator.constraints.Email;ImportOrg.hibernate.validator.constraints.NotEmpty; Public classUser {Private intID; PrivateString username; PrivateString Nickname; PrivateString password; PrivateString Email; PublicUser (string username, string nickname, string password, string email) { This. Username =username; This. Nickname =nickname; This. Password =password; This. email =email; } PublicUser () {Super(); } Public intgetId () {returnID; } Public voidSetId (intID) { This. ID =ID; } @NotEmpty (Message= "User name cannot be empty") PublicString GetUserName () {returnusername; } Public voidSetusername (String username) { This. Username =username; } PublicString Getnickname () {returnnickname; } Public voidSetnickname (String nickname) { This. Nickname =nickname; } @NotEmpty (Message= "Password cannot be empty") @Size (min= 3, max = 10,message= "Password length must be greater than 3 less than 10") PublicString GetPassword () {returnpassword; } Public voidSetPassword (String password) { This. Password =password; } @Email (Message= "Mail format is [email protected]") PublicString Getemail () {returnemail; } Public voidsetemail (String email) { This. email =email; } @Override PublicString toString () {return"User [id=" + ID + ", username=" + Username + ", nickname=" + nickname + ", password=" + password + ", Emai L= "+Email+ "]"; }}
Adding @valid and Bindingresult to the controller to process the validation results
PackageCom.stone.controller;ImportJava.util.HashMap;ImportJava.util.Map;ImportJavax.validation.Valid;ImportOrg.springframework.stereotype.Controller;ImportOrg.springframework.ui.Model;ImportOrg.springframework.validation.BindingResult;Importorg.springframework.web.bind.annotation.RequestMapping;ImportOrg.springframework.web.bind.annotation.RequestMethod;ImportOrg.springframework.web.servlet.view.InternalResourceViewResolver;ImportCom.stone.model.User, @Controller @requestmapping ("/USER") Public classUsercontroller {Private Final Staticmap<string, user> users =NewHashmap<string, user>(); PublicUsercontroller () {Users.put ("LDH",NewUser ("LDH", "Andy Lau", "123", "[email protected]")); Users.put ("Zxy",NewUser ("Zxy", "Jacky", "123", "[email protected]")); Users.put ("GFC",NewUser ("GFC", "Aaron Kwok", "123", "[email protected]")); Users.put ("LM",NewUser ("LM", "Dawn", "123", "[email protected]")); } @RequestMapping ("/users") PublicThe String list (model model) {Model.addattribute ("Users", users); return"User/list"; } @RequestMapping (Value= "/add", method =requestmethod.get) PublicString Add (model model) {Model.addattribute (NewUser ()); return"User/add"; } @RequestMapping (Value= "/add", method =requestmethod.post) PublicString Add (@Valid user user, Bindingresult bingding) {if(Bingding.haserrors ()) {return"User/add"; } users.put (User.getusername (), user); returnInternalresourceviewresolver.redirect_url_prefix + "/user/users"; }}
Add a validation hint message to the JSP
<%@ Page Language="Java"Import="java.util.*"pageencoding="Utf-8"%><%@taglib prefix="SF"URI="Http://www.springframework.org/tags/form"%><% StringPath=Request.getcontextpath (); StringBasePath=Request.getscheme ()+ "://" +Request.getservername ()+ ":" +Request.getserverport ()+Path+ "/";%><!DOCTYPE HTML PUBLIC "-//w3c//dtd HTML 4.01 transitional//en"><HTML><Head><Basehref= "<%=basePath%>"><title>My JSP ' add.jsp ' starting page</title><Metahttp-equiv= "Pragma"content= "No-cache"><Metahttp-equiv= "Cache-control"content= "No-cache"><Metahttp-equiv= "Expires"content= "0"></Head><Body> <Sf:formMethod= "POST"Modelattribute= "User">Username:<Sf:inputPath= "username" /> <sf:errorsPath= "username" /> <BR/>Password:<Sf:passwordPath= "Password" /> <sf:errorsPath= "Password" /> <BR/>Nickname:<Sf:inputPath= "nickname" /> <BR/>Email:<Sf:inputPath= "Email" /> <sf:errorsPath= "Email" /> <BR/> <inputtype= "Submit" /> </Sf:form></Body></HTML>
Spring MVC Data validation
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