使用SpringMVC开发的时候，页面如果有日期格式的数据，后台接受也是java.util.Date，则报告400错误 。下面是解决方案的演示示例：
这个是实体类，里面createDate就是java.util.Date类型
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 }
页面代码
1 <form action="regUser" method="post"> 2 userName:<input type="text" name="userName"/><br> 3 createDate:<input type="text" name="createDate"/><br> 4 double类型:<input type="text" name="dd"/><br> 5 <input type="submit" value="注册"> 6 </form>
因为对于原生基本类型的form表单绑定，会出错。需要指定具体的类型编辑器。用法如下：首先在BaseController中增加方法initBinder，并使用注解@InitBinder标注，那么spring mvc在绑定表单之前，都会先注册这些编辑器。剩下的控制器都继承该类。CustomDateEditor spring自己已经提供了。代码如下：
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 }
上面的代码不仅仅有日期格式的编辑器，还有基础类型的编辑器，这样就解决了SpringMVC中controller方法接受参数的时候，基础类型报错的问题了。
下面是测试用代码，继承BaseController之后就可以直接运行了。接受的参数有实体类和基础类型。
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，问题解决。然后我们切换第二种方式，删除 BaseController 这个类，直接在User实体类中的 createDate字段上加上注解 ， 注意第10行代码：
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 }
这样也可以解决日期格式报400问题。而且不管页面是否有数据都可以正常使用。
转自 SpringMVC + Spring + MyBatis 学习笔记：提交数据遭遇基础类型和日期类型报400错误解决方法
本文转自欢醉博客园博客，原文链接http://www.cnblogs.com/zhangs1986/p/8086037.html如需转载请自行联系原作者
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