List驗證大小的List？

Question

如何設置一個List應至少包含1且最多包含10個元素的bean驗證約束？

無以下作品：

@Min(1) 
@Max(10) 
@Size(min=1, max=10) 
private List<String> list; 

Answer 1

我創建簡單的類：

public class Mock { 

    @Size(min=1, max=3) 
    private List<String> strings; 

    public List<String> getStrings() { 
     return strings; 
    } 

    public void set(List<String> strings) { 
     this.strings = strings; 
    } 

} 

和測試：

Mock mock = new Mock(); 
mock.setStrings(Collections.emptyList()); 
final Set<ConstraintViolation<Mock>> violations1 = Validation.buildDefaultValidatorFactory().getValidator().validate(mock); 
assertFalse(violations1.isEmpty()); 

mock.setStrings(Arrays.asList("A", "B", "C", "D")); 
final Set<ConstraintViolation<Mock>> violations2 = Validation.buildDefaultValidatorFactory().getValidator().validate(mock); 
assertFalse(violations2.isEmpty()); 

似乎@Size註釋運作良好。它來自javax.validation.constraints.Size