Join in jar package


Add validation to the entity class Annotation And message tips

package com.stone.model;
import javax.validation.constraints.Size;
import org.hibernate.validator.constraints.Email;
import org.hibernate.validator.constraints.NotEmpty; public class User { private int id;
private String username;
private String nickname;
private String password;
private String email; public User(String username, String nickname, String password, String email) {
this.username = username;
this.nickname = nickname;
this.password = password; = email;
} public User() {
} public int getId() {
return id;
} public void setId(int id) { = id;
} @NotEmpty(message=" The username cannot be empty ")
public String getUsername() {
return username;
} public void setUsername(String username) {
this.username = username;
} public String getNickname() {
return nickname;
} public void setNickname(String nickname) {
this.nickname = nickname;
} @NotEmpty(message=" The password cannot be empty ")
@Size(min = 3, max = 10,message=" The password length must be greater than 3 Less than 10")
public String getPassword() {
return password;
} public void setPassword(String password) {
this.password = password;
} @Email(message=" The format of the email is")
public String getEmail() {
return email;
} public void setEmail(String email) { = email;
} @Override
public String toString() {
return "User [id=" + id + ", username=" + username + ", nickname="
+ nickname + ", password=" + password + ", email=" + email
+ "]";
} }

stay Controller Add @Valid and BindingResult Process validation results

package com.stone.controller;
import java.util.HashMap;
import java.util.Map; import javax.validation.Valid; import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.validation.BindingResult;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.servlet.view.InternalResourceViewResolver; import com.stone.model.User; @Controller
public class UserController { private final static Map<String, User> users = new HashMap<String, User>(); public UserController() {
users.put("ldh", new User("ldh", " Lau Andy ", "123", ""));
users.put("zxy", new User("zxy", " Jacky Cheung ", "123", ""));
users.put("gfc", new User("gfc", " Aaron Kwok ", "123", ""));
users.put("lm", new User("lm", " The dawn ", "123", ""));
} @RequestMapping("/users")
public String list(Model model) {
model.addAttribute("users", users);
return "user/list";
} @RequestMapping(value = "/add", method = RequestMethod.GET)
public String add(Model model) {
model.addAttribute(new User());
return "user/add";
} @RequestMapping(value = "/add", method = RequestMethod.POST)
public String add(@Valid User user, BindingResult bingding) {
if (bingding.hasErrors()) {
return "user/add";
users.put(user.getUsername(), user);
return InternalResourceViewResolver.REDIRECT_URL_PREFIX + "/user/users";

stay jsp Add the verification prompt message to

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%@taglib prefix="sf" uri=""%>
String path = request.getContextPath();
String basePath = request.getScheme() + "://"
+ request.getServerName() + ":" + request.getServerPort()
+ path + "/";
%> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<base href="<%=basePath%>"> <title>My JSP 'add.jsp' starting page</title> <meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0"> </head> <body>
<sf:form method="post" modelAttribute="user">
username:<sf:input path="username" />
<sf:errors path="username" />
<br />
password:<sf:password path="password" />
<sf:errors path="password" />
<br />
nickname:<sf:input path="nickname" />
<br />
email:<sf:input path="email" />
<sf:errors path="email" />
<br />
<input type="submit" />

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