使用SpringMVC開發的時候，頁面如果有日期格式的數據，後臺接受也是java.util.Date，則報告400錯誤 。下面是解決方案的演示示例：

這個是實體類，裏面createDate就是java.util.Date類型

 1 import java.util.Date;
 2 
 3 public class User {
 4 
 5     private int userId;
 6     private String userName;
 7     private Date createDate;
 8     
 9     public User() {}
10 
11     public User(int userId, String userName, Date createDate) {
12         super();
13         this.userId = userId;
14         this.userName = userName;
15         this.createDate = createDate;
16     }
17 
18     public User(String userName, Date createDate) {
19         super();
20         this.userName = userName;
21         this.createDate = createDate;
22     }
23 
24     public int getUserId() {
25         return userId;
26     }
27 
28     public void setUserId(int userId) {
29         this.userId = userId;
30     }
31 
32     public String getUserName() {
33         return userName;
34     }
35 
36     public void setUserName(String userName) {
37         this.userName = userName;
38     }
39 
40     public Date getCreateDate() {
41         return createDate;
42     }
43 
44     public void setCreateDate(Date createDate) {
45         this.createDate = createDate;
46     }
47 
48     @Override
49     public String toString() {
50         return "User [createDate=" + createDate + ", userId=" + userId
51                 + ", userName=" + userName + "]";
52     }
53 }

頁面代碼

1 　　<form action="regUser" method="post">
2         userName:<input type="text" name="userName"/><br>
3         createDate:<input type="text" name="createDate"/><br>
4         double類型:<input type="text" name="dd"/><br>
5         <input type="submit" value="註冊">
6     </form>

因為對於原生基本類型的form表單綁定，會出錯。需要指定具體的類型編輯器。用法如下：首先在BaseController中增加方法initBinder，並使用註解@InitBinder標註，那麽spring mvc在綁定表單之前，都會先註冊這些編輯器。剩下的控制器都繼承該類。CustomDateEditor spring自己已經提供了。代碼如下：

 1 import java.text.SimpleDateFormat;
 2 import java.util.Date;
 3 
 4 import org.springframework.beans.propertyeditors.CustomDateEditor;
 5 import org.springframework.stereotype.Controller;
 6 import org.springframework.web.bind.WebDataBinder;
 7 import org.springframework.web.bind.annotation.InitBinder;
 8 
 9 import sun.beans.editors.DoubleEditor;
10 import sun.beans.editors.FloatEditor;
11 import sun.beans.editors.IntEditor;
12 import sun.beans.editors.LongEditor;
13 
14 @Controller
15 public class BaseController {
16 
17     @InitBinder    
18     public void initBinder(WebDataBinder binder) {    
19 
20         binder.registerCustomEditor(Date.class, new CustomDateEditor(new SimpleDateFormat("yyyy-MM-dd"), true)); 
21         binder.registerCustomEditor(int.class, new IntEditor());
22         binder.registerCustomEditor(long.class, new LongEditor());  
23         binder.registerCustomEditor(double.class, new DoubleEditor());  
24         binder.registerCustomEditor(float.class, new FloatEditor());  
25     }
26     
27     
28 }

上面的代碼不僅僅有日期格式的編輯器，還有基礎類型的編輯器，這樣就解決了SpringMVC中controller方法接受參數的時候，基礎類型報錯的問題了。

下面是測試用代碼，繼承BaseController之後就可以直接運行了。接受的參數有實體類和基礎類型。

 1 import org.springframework.stereotype.Controller;
 2 import org.springframework.web.bind.annotation.RequestMapping;
 3 
 4 import com.kickstarter.entity.User;
 5 
 6 @Controller("userController")
 7 public class UserController extends BaseController{
 8 
 9     @RequestMapping(value="regUser")
10     public String dateTest(User user , double dd){
11         
12         System.out.println( user.toString() );
13         System.out.println( dd );
14         return "index"; 
15     }
16 }

以上，問題解決。然後我們切換第二種方式，刪除 BaseController 這個類，直接在User實體類中的 createDate字段上加上註解 ， 註意第10行代碼：

 1 import java.util.Date;
 2 
 3 import org.springframework.format.annotation.DateTimeFormat;
 4 
 5 public class User {
 6 
 7     private int userId;
 8     private String userName;
 9     
10     @DateTimeFormat(pattern="yyyy-MM-dd")
11     private Date createDate;
12     
13     public User() {}
14 
15     public User(int userId, String userName, Date createDate) {
16         super();
17         this.userId = userId;
18         this.userName = userName;
19         this.createDate = createDate;
20     }
21 
22     public User(String userName, Date createDate) {
23         super();
24         this.userName = userName;
25         this.createDate = createDate;
26     }
27 
28     public int getUserId() {
29         return userId;
30     }
31 
32     public void setUserId(int userId) {
33         this.userId = userId;
34     }
35 
36     public String getUserName() {
37         return userName;
38     }
39 
40     public void setUserName(String userName) {
41         this.userName = userName;
42     }
43 
44     public Date getCreateDate() {
45         return createDate;
46     }
47 
48     public void setCreateDate(Date createDate) {
49         this.createDate = createDate;
50     }
51 
52     @Override
53     public String toString() {
54         return "User [createDate=" + createDate + ", userId=" + userId
55                 + ", userName=" + userName + "]";
56     }
57 }

這樣也可以解決日期格式報400問題。而且不管頁面是否有數據都可以正常使用。

轉自 SpringMVC + Spring + MyBatis 學習筆記：提交數據遭遇基礎類型和日期類型報400錯誤解決方法

SpringMVC提交數據遭遇基礎類型和日期類型報400錯誤解決方法