jsr 303 如何控制错误信息的顺序_及groups标记属性的作用和用法

源自：http://www.oschina.net/question/1241831_154710

jsr 303 如何控制错误信息的顺序(如按属性从上往下)

public interface GroupA { 
 } 
 public interface GroupB { 
 } 
 @GroupSequence({ GroupA.class, GroupB.class}) 
 public interface Group { 
 } 
 public class User { 
 @NotEmpty (message = "firstname may be empty") 
 private String firstname; 

 @NotEmpty(message = "middlename may be empty", groups = Default.class) 
 private String middlename; 

 @NotEmpty(message = "lastname may be empty",groups = GroupA.class) 
 private String lastname; 

 @NotEmpty(message = "country may be empty",groups = GroupB.class) 
 private String country; 
 } 
 public static void main(String[] args){ 
 User user = new User(); 
 ValidatorFactory vf = Validation.buildDefaultValidatorFactory();
 Validator validator = vf.getValidator(); 
 Set> set = validator.validate(user,Group.class); 
 for (ConstraintViolation constraintViolation : set) { 
 System.out.println(constraintViolation.getMessage()); 
 } 
 }

@GroupSequence

这个注解里面就是用来验证排序的，最前的选验证；一旦有错误便不会继续验证下去了...