gwt验证 - 如果注释超过1个字段，则不会获取违规

Question

我正在运行此代码。如果我向1个字段添加验证注释，则会正确选取违规。但是，如果我在多个字段上添加注释，则根本不会发现任何违规行为。

public class Address implements Serializable {

    private static final long serialVersionUID = 225035939665473333L;

    @NotNull
    @NotEmpty
    @Size(min = 4, max = 50, message="test")
    private String Name;

    @NotNull
    @NotEmpty
    private String AddressLine1;

    private String AddressLine2;
    private String PostalCode;
    private String Province;

    @NotNull
    @NotEmpty
    private String Country;

    //getter and setters below this line
}

我正在运行此代码：

ValidatorFactory factory = Validation.byDefaultProvider().configure().buildValidatorFactory();
Validator validator = factory.getValidator();
Address a = new Address();
a.setName("a");

Set<ConstraintViolation<Address>> violations = validator.validate(a);

Window.alert(String.valueOf(violations.size()));
for(ConstraintViolation<Address> violation : violations){
    Window.alert(violation.getMessage());
}

这将获得零错误，即使它应该拾取3个错误。 AddressLine1，Country不应为null。名字太短。如果我将类更改为下面的代码，它将会发现名称太短并显示错误消息＆＃34; test＆＃34;。

public class Address implements Serializable {

    private static final long serialVersionUID = 225035939665473333L;

    @NotNull
    @NotEmpty
    @Size(min = 4, max = 50, message="test")
    private String Name;

    private String AddressLine1;

    private String AddressLine2;
    private String PostalCode;
    private String Province;

    private String Country;

    //getter and setters below this line
}