<dependency>
 <groupId>org.hibernate</groupId>
 <artifactId>hibernate-validator</artifactId>
 <version>4.3.1.Final</version> 
</dependency>

public class DataSetSaveVO {
 //唯一標(biāo)識(shí)符為空
 @NotBlank(message = "user uuid is empty")
 //用戶名稱(chēng)只能是字母和數(shù)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;

 //數(shù)據(jù)集名稱(chēng)只能是字母和數(shù)字
 @Pattern(regexp = "^[A-Za-z0-9]+$", message = "data set names can only be letters and Numbers")
 //文件名稱(chēng)過(guò)長(zhǎng)
 @Length(max = 48, message = "file name too long")
 //文件名稱(chēng)為空
 @NotBlank(message = "file name is empty")
 private String name;

 //數(shù)據(jù)集描述最多為256字節(jié)
 @Length(max = 256, message = "data set description length over 256 byte")
 //數(shù)據(jù)集描述為空
 @NotBlank(message = "data set description is null")
 private String description;
}

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

<dependency>
 <groupId>org.apache.commons</groupId>
 <artifactId>commons-lang3</artifactId>
 <version>3.4</version>
</dependency>

//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<Integer> emptyList = new ArrayList<>();
List<Integer> nullList = null;
List<Integer> 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