基于springmvc的简单增删改查实现---中间使用到了bean validation

  1 package com.kite.controller;
  2 
  3 import java.util.HashMap;
  4 import java.util.Map;
  5 
  6 import javax.validation.Valid;
  7 
  8 import org.springframework.stereotype.Controller;
  9 import org.springframework.ui.Model;
 10 import org.springframework.validation.BindingResult;
 11 import org.springframework.validation.annotation.Validated;
 12 import org.springframework.web.bind.annotation.ModelAttribute;
 13 import org.springframework.web.bind.annotation.PathVariable;
 14 import org.springframework.web.bind.annotation.RequestMapping;
 15 import org.springframework.web.bind.annotation.RequestMethod;
 16 
 17 import com.kite.entity.User;
 18 
 19 /**
 20  * 简单的增删改查实现
 21  * @author kite
 22  *
 23  */
 24 @Controller
 25 @RequestMapping(value={"/user"})
 26 public class UserController
 27 {
 28     //简单数据模拟
 29     Map<String, User> map = new HashMap<String, User>();
 30     public UserController()
 31     {
 32         map.put("zs", new User("zs", "123", "张三", "123dsad456"));
 33         map.put("ll", new User("ll", "321", "李四", "123dsa456"));
 34         map.put("ww", new User("ww", "32154", "王五", "dsa"));
 35         map.put("zl", new User("zl", "5dsada", "赵六", "dsadsa"));
 36     }
 37     /**
 38      * 显示列表
 39      * @param model
 40      * @return
 41      */
 42     @RequestMapping({"/list"})
 43     public String list(Model model)
 44     {
 45         model.addAttribute("users", map);
 46         return "user/list";
 47     }
 48     /**
 49      * 到添加页面使用method请求的方式来区分
 50      * @return
 51      */
 52     @RequestMapping(value={"/add"},method=RequestMethod.GET)
 53     public String add(User user)
 54     {
 55         return "/user/add";
 56     }
 57     /**
 58      * post请求方式实现真正的添加
 59      * 使用bean validation
 60      * BindingResult br 必须在@valid后面
 61      * @return
 62      */
 63     @RequestMapping(value={"/add"}, method=RequestMethod.POST)
 64     public String add(@Validated User user,  BindingResult br)
 65     {
 66         if(br.hasErrors())
 67         {
 68             //出错
 69             return "user/add";
 70         }
 71         map.put(user.getUserName(), user);
 72         return "redirect:/user/list";
 73     }
 74     /**
 75      * 查看
 76      * @param userName
 77      * @param model
 78      * @return
 79      */
 80     @RequestMapping({"/{userName}/show"})
 81     public String show(@PathVariable String userName, Model model)
 82     {
 83         User user = map.get(userName);
 84         model.addAttribute(user);
 85         return "/user/show";
 86     }
 87     /**
 88      * 到修改页面
 89      * @param userName
 90      * @return
 91      */
 92     @RequestMapping(value={"/{userName}/update"},method=RequestMethod.GET)
 93     public String update(@PathVariable @ModelAttribute(value="userName") String userName, Model model)
 94     {
 95         User user = map.get(userName);
 96         model.addAttribute(user);
 97         return "/user/update";
 98     }
 99     /**
100      * 真正的更新
101      * @param userName
102      * @param user
103      * @param br
104      * @return
105      */
106     @RequestMapping(value={"/{userName}/update"},method=RequestMethod.POST)
107     public String update(@PathVariable String userName, @Valid User user, BindingResult br)
108     {
109         map.put(userName, user);
110         return "redirect:/user/list";
111     }
112     /**
113      * 删除的实现
114      * @param userName
115      * @return
116      */
117     @RequestMapping(value={"/{userName}/delete"},method=RequestMethod.GET)        
118     public String delete(@PathVariable String userName)
119     {
120         map.remove(userName);
121         return "redirect:/user/list";
122     }
123 }

使用到bean validation的类  注解放在get方法只上

 1 package com.kite.entity;
 2 
 3 
 4 import javax.validation.constraints.Size;
 5 
 6 import org.hibernate.validator.constraints.Email;
 7 import org.hibernate.validator.constraints.NotEmpty;
 8 import org.hibernate.validator.constraints.Range;
 9 
10 public class User
11 {
12     private String userName;
13     private String password;
14     private String nickName;
15     private String email;
16     public User()
17     {
18         super();
19         // TODO Auto-generated constructor stub
20     }
21     public User(String userName, String password, String nickName, String email)
22     {
23         super();
24         this.userName = userName;
25         this.password = password;
26         this.nickName = nickName;
27         this.email = email;
28     }
29     @Override
30     public String toString()
31     {
32         return "User [userName=" + userName + ", password=" + password
33                 + ", nickName=" + nickName + ", email=" + email + "]";
34     }
35     @NotEmpty(message="用户名不能为空")
36     public String getUserName()
37     {
38         return userName;
39     }
40     
41     public void setUserName(String userName)
42     {
43         this.userName = userName;
44     }
45     @Size(min=6,max=18,message="密码的长度必须在6-18之间")
46     public String getPassword()
47     {
48         return password;
49     }
50     
51     public void setPassword(String password)
52     {
53         this.password = password;
54     }
55     public String getNickName()
56     {
57         return nickName;
58     }
59     public void setNickName(String nickName)
60     {
61         this.nickName = nickName;
62     }
63     @Email(message="邮箱格式不符合")
64     public String getEmail()
65     {
66         return email;
67     }
68     
69     public void setEmail(String email)
70     {
71         this.email = email;
72     }
73     
74     
75 }