Springboot如何优雅地进行字段校验

 org.hibernate
 hibernate-validator
 4.3.1.Final 

public class DataSetSaveVO {
 //唯一标识符为空
 @NotBlank(message = "user uuid is empty")
 //用户名称只能是字母和数字
 @Pattern(regexp = "^[a-z0-9]+$", message = "user names can only be alphabetic and numeric")
 @Length(max = 48, message = "user uuid length over 48 byte")
 private String userUuid;

 //数据集名称只能是字母和数字
 @Pattern(regexp = "^[A-Za-z0-9]+$", message = "data set names can only be letters and Numbers")
 //文件名称过长
 @Length(max = 48, message = "file name too long")
 //文件名称为空
 @NotBlank(message = "file name is empty")
 private String name;

 //数据集描述最多为256字节
 @Length(max = 256, message = "data set description length over 256 byte")
 //数据集描述为空
 @NotBlank(message = "data set description is null")
 private String description;
}

@PostMapping
public ResponseVO createDataSet(@Valid @RequestBody DataSetSaveVO dataSetVO) {
 return ResponseUtil.success(dataSetService.saveDataSet(dataSetVO));
}

 org.apache.commons
 commons-lang3
 3.4

//StringUtils.isEmpty
System.out.println(StringUtils.isEmpty("")); //true
System.out.println(StringUtils.isEmpty(" ")); //false
//StringUtils.isNotEmpty
System.out.println(StringUtils.isNotEmpty("")); //false
 
//StringUtils.isBlank
System.out.println(StringUtils.isBlank("")); //true
System.out.println(StringUtils.isBlank(" ")); //true
//StringUtils.isNotBlank
System.out.println(StringUtils.isNotBlank(" ")); //false

List emptyList = new ArrayList<>();
List nullList = null;
List notEmptyList = new ArrayList<>();
notEmptyList.add(1);

//CollectionUtils.isEmpty
System.out.println(CollectionUtils.isEmpty(emptyList)); //true
System.out.println(CollectionUtils.isEmpty(nullList)); //true
System.out.println(CollectionUtils.isEmpty(notEmptyList)); //false

//CollectionUtils.isNotEmpty
System.out.println(CollectionUtils.isNotEmpty(emptyList)); //false
System.out.println(CollectionUtils.isNotEmpty(nullList)); //false
System.out.println(CollectionUtils.isNotEmpty(notEmptyList)); //true