spring mvc form提交驗證

    @RequestMapping(value="/add",method=RequestMethod.POST)
    public String add(@Validated User user,BindingResult br,Model model){
        //System.out.println("xxxxxxxxxxxxxxxxxx........................"+user.getUsername() +"," +user.getNickname());
        log.debug("user add:"+user.getUsername() +"," +user.getNickname());
        if(br.hasErrors()){
            return "user/add";
        }
        users.put(user.getUsername(),user);
        model.addAttribute("user",user);
        return "redirect:list";  //演示1：客戶端跳轉，add 與list action同級。
    }

 

 

package com.jxq.model;

import javax.validation.constraints.Size;

import org.hibernate.validator.constraints.Email;
import org.hibernate.validator.constraints.Length;
import org.hibernate.validator.constraints.NotEmpty;

public class User {
    private String username;
    private String userpass;
    private String nickname;
    private String email;
    
    public User() {
        // TODO Auto-generated constructor stub
    }
    @NotEmpty(message="用戶名不能爲空")
    public String getUsername() {
        return username;
    }
    public void setUsername(String username) {
        this.username = username;
    }
    
    @Size(min=6,message="密碼不低於6位")
    public String getUserpass() {
        return userpass;
    }
    public void setUserpass(String userpass) {
        this.userpass = userpass;
    }
    public String getNickname() {
        return nickname;
    }
    public void setNickname(String nickname) {
        this.nickname = nickname;
    }
    
    @Email(message="郵箱格式不正確")
    public String getEmail() {
        return email;
    }
    public void setEmail(String email) {
        this.email = email;
    }
    public User(String username, String userpass, String nickname, String email) {
        super();
        this.username = username;
        this.userpass = userpass;
        this.nickname = nickname;
        this.email = email;
    }
    
}
 

 

 

      <sf:form modelAttribute="user" method="POST">
        username：<sf:input path="username" /><sf:errors path="username" /><br>
        userpass：<sf:input path="userpass" /><sf:errors path="userpass" /><br>
        nickname：<sf:input path="nickname" /><br>
        email：<sf:input path="email" /><sf:errors path="email" /><br>
        <input type="submit" value="保存用戶" />
    </sf:form>