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

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

使用hibernate validator出现上面的错误， 需要 注意

@NotNull 和 @NotEmpty  和@NotBlank 区别

@NotEmpty 用在集合类上面
@NotBlank 用在String上面
@NotNull    用在基本类型上

如果在基本类型上面用NotEmpty或者NotBlank 会出现上面的错