基於springmvc的簡單增刪改查實現---中間使用到了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  * 簡單的增刪改查實現  21  * @author kite  22  *  23  */
 24 @Controller  25 @RequestMapping(value={"/user"})  26 public class UserController  27 {  28     //簡單數據模擬
 29     Map<String, User> map = new HashMap<String, User>();  30     public UserController()  31  {  32         map.put("zs", new User("zs", "123", "張三", "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", "趙六", "dsadsa"));  36  }  37     /**
 38  * 顯示列表  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  * 到添加頁面使用method請求的方式來區分  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請求方式實現真正的添加  59  * 使用bean validation  60  * BindingResult br 必須在@valid後面  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             //出錯
 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  * 到修改頁面  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  * 刪除的實現 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的類  註解放在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="用戶名不能爲空") 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="密碼的長度必須在6-18之間") 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="郵箱格式不符合") 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 }

其餘代碼就不一一複製了