javax.validation.UnexpectedTypeException: No validator could be found for type: java.lang.Integer

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1. Apr 8, 2014 2:13:57 PM org.apache.catalina.core.StandardWrapperValve invoke  
2. SEVERE: Servlet.service() for servlet springmvc threw exception  
3. javax.validation.UnexpectedTypeException: No validator could be found for type: java.lang.Integer  
4.     at org.hibernate.validator.engine.ConstraintTree.verifyResolveWasUnique(ConstraintTree.java:383)  
5.     at org.hibernate.validator.engine.ConstraintTree.findMatchingValidatorClass(ConstraintTree.java:364)  
6.     at org.hibernate.validator.engine.ConstraintTree.getInitializedValidator(ConstraintTree.java:313)  
7.     at org.hibernate.validator.engine.ConstraintTree.validateConstraints(ConstraintTree.java:144)  
8.     at org.hibernate.validator.engine.ConstraintTree.validateComposingConstraints(ConstraintTree.java:233)  
9.     at org.hibernate.validator.engine.ConstraintTree.validateConstraints(ConstraintTree.java:128)  
10.     at org.hibernate.validator.engine.ConstraintTree.validateConstraints(ConstraintTree.java:117)  
11.     at org.hibernate.validator.metadata.MetaConstraint.validateConstraint(MetaConstraint.java:84)  
12.     at org.hibernate.validator.engine.ValidatorImpl.validateConstraint(ValidatorImpl.java:452)  

使用hibernate validator出現上面的錯誤， 需要 注意

@NotNull 和 @NotEmpty  和@NotBlank 區別

• @NotEmpty 用在集合類上面
• @NotBlank 用在String上面
• @NotNull    用在基本類型上

如果在基本類型上面用NotEmpty或者NotBlank 會出現上面的錯

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javax.validation.UnexpectedTypeException: No validator could be found for type: java.lang.Integer