<dependency>
   <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-validation</artifactId>
</dependency>

@Data
public class School{

    @NotBlank
    private String id;
    private String name;
    @Valid                // 需要加上，否則不會驗(yàn)證student類中的校驗(yàn)注解
    @NotNull 			  // 且需要觸發(fā)該字段的驗(yàn)證才會進(jìn)行嵌套驗(yàn)證。
    private List<Student> list;
}

@Data
public class Student {

    @NotBlank
    private String id;
    private String name;
    private int age;
    
}

@PostMapping("/test")
public Result test(@Validated @RequestBody School school){

}

import lombok.Data;

import javax.validation.constraints.Min;
import javax.validation.constraints.NotBlank;
import javax.validation.constraints.NotNull;
import javax.validation.constraints.Pattern;
import java.io.Serializable;

@Data
public class BrandEntity implements Serializable {
	private static final long serialVersionUID = 1L;

	/**
	 * 品牌id
	 */
	@NotNull(message = "修改必須有品牌id")
	private Long brandId;
	/**
	 * 品牌名F
	 */
	@NotBlank(message = "品牌名必須提交")
	private String name;
	/**
	 * 品牌logo地址
	 */
	@NotBlank(message = "地址必須不為空")
	private String logo;
	/**
	 * 介紹
	 */
	private String descript;
	
	/**
	 * 檢索首字母
	 */
	//正則表達(dá)式
	@Pattern(regexp = "^[a-zA-Z]$",message = "檢索的首字母必須是字母")
	private String firstLetter;
	/**
	 * 排序
	 */
	@Min(value = 0,message = "排序必須大于等于0")
	private Integer sort;

}

import com.alibaba.druid.util.StringUtils;
import io.swagger.annotations.ApiModel;
import io.swagger.annotations.ApiModelProperty;
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;

//統(tǒng)一返回結(jié)果
@Data
@NoArgsConstructor
@AllArgsConstructor
@ApiModel
public class Result<T> {
    @ApiModelProperty("響應(yīng)碼")
    private Integer code;
    @ApiModelProperty("相應(yīng)信息")
    private String msg;
    @ApiModelProperty("返回對象或者集合")
    private T data;

    //成功碼
    public static final Integer SUCCESS_CODE = 200;
    //成功消息
    public static final String SUCCESS_MSG = "SUCCESS";

    //失敗
    public static final Integer ERROR_CODE = 201;
    public static final String ERROR_MSG = "系統(tǒng)異常,請聯(lián)系管理員";
    //沒有權(quán)限的響應(yīng)碼
    public static final Integer NO_AUTH_COOD = 999;

    //執(zhí)行成功
    public static <T> Result<T> success(T data){
        return new Result<>(SUCCESS_CODE,SUCCESS_MSG,data);
    }
    //執(zhí)行失敗
    public static <T> Result failed(String msg){
        msg = StringUtils.isEmpty(msg)? ERROR_MSG : msg;
        return new Result(ERROR_CODE,msg,"");
    }
    //傳入錯誤碼的方法
    public static <T> Result failed(int code,String msg){
        msg = StringUtils.isEmpty(msg)? ERROR_MSG : msg;
        return new Result(code,msg,"");
    }
    //傳入錯誤碼的數(shù)據(jù)
    public static <T> Result failed(int code,String msg,T data){
        msg = StringUtils.isEmpty(msg)? ERROR_MSG : msg;
        return new Result(code,msg,data);
    }
}

@PostMapping("/add")
public Result add(@Valid @RequestBody BrandEntity brandEntity)  {

    return Result.success("成功");
}

<dependency>
    <groupId>org.hibernate.validator</groupId>
    <artifactId>hibernate-validator</artifactId>
    <version>6.0.18.Final</version>
</dependency>

@PostMapping("/add")
public Result add(@Valid @RequestBody BrandEntity brandEntity, BindingResult bindingResult){

    if (bindingResult.hasErrors()){
        Map<String,String> map = new HashMap<>();
        bindingResult.getFieldErrors().forEach(item ->{
            map.put(item.getField(),item.getDefaultMessage());
        });
        return Result.failed(400,"提交的數(shù)據(jù)不合規(guī)范",map);
    }
    
    return Result.success("成功");
}

{
    "code": 400,
    "data": {
        "name": "品牌名必須提交",
        "logo": "地址必須不為空"
    },
    "msg": "提交的數(shù)據(jù)不合規(guī)范"
}

import com.wang.test.demo.response.Result;
import lombok.extern.slf4j.Slf4j;
import org.springframework.validation.BindingResult;
import org.springframework.web.bind.MethodArgumentNotValidException;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.RestControllerAdvice;

@Slf4j
@RestControllerAdvice(basePackages = "com.wang.test.demo.controller")
public class ExceptionControllerAdvice {

    @ExceptionHandler(value = MethodArgumentNotValidException.class)
    public Result handleVaildException(MethodArgumentNotValidException e){

        log.error("數(shù)據(jù)校驗(yàn)出現(xiàn)問題：{}，異常類型：{}",e.getMessage(),e.getClass());
        BindingResult bindingResult = e.getBindingResult();
        StringBuffer stringBuffer = new StringBuffer();
        bindingResult.getFieldErrors().forEach(item ->{
            //獲取錯誤信息
            String message = item.getDefaultMessage();
            //獲取錯誤的屬性名字
            String field = item.getField();
            stringBuffer.append(field + ":" + message + " ");
        });
        return Result.failed(400, stringBuffer + "");

    }

    @ExceptionHandler(value = Throwable.class)
    public Result handleException(Throwable throwable){

        log.error("錯誤",throwable);
        return Result.failed(400, "系統(tǒng)異常");
    }
}

public interface EditGroup {
}
public interface AddGroup {
}

/**
 * 品牌id
 */
@NotNull(message = "修改必須有品牌id",groups = {EditGroup.class})
@Null(message = "新增不能指定id",groups = {AddGroup.class})
private Long brandId;
// 其余屬性我們不變

@PostMapping("/add")
public Result add(@Validated({AddGroup.class}) @RequestBody BrandEntity brandEntity){

    return Result.success("成功");
}

@PostMapping("/edit")
public Result edit(@Validated({EditGroup.class}) @RequestBody BrandEntity brandEntity){

    return Result.success("成功");
}

import javax.validation.ConstraintValidator;
import javax.validation.ConstraintValidatorContext;
import java.util.HashSet;
import java.util.Set;

//編寫自定義的校驗(yàn)器
public class ListValueConstraintValidator implements ConstraintValidator<ListValue,Integer> {

    private Set<Integer> set=new HashSet<Integer>();

    //初始化方法
    @Override
    public void initialize(ListValue constraintAnnotation) {
        int[] value = constraintAnnotation.vals();
        for (int i : value) {
            set.add(i);
        }
    }
    /**
     * 判斷是否校驗(yàn)成功
     * @param value  需要校驗(yàn)的值
     * @param context
     * @return
     */
    @Override
    public boolean isValid(Integer value, ConstraintValidatorContext context) {
        return  set.contains(value);
    }
}

@Documented
@Constraint(validatedBy = { ListValueConstraintValidator.class })
@Target({ METHOD, FIELD, ANNOTATION_TYPE, CONSTRUCTOR, PARAMETER, TYPE_USE })
@Retention(RUNTIME)
public @interface ListValue {
    // 使用該屬性去Validation.properties中取
    String message() default "{com.atguigu.common.valid.ListValue.message}";

    Class<?>[] groups() default { };

    Class<? extends Payload>[] payload() default { };

    int[] vals() default {};

}

/**
 * 顯示狀態(tài)[0-不顯示；1-顯示]
 */
@NotNull(groups = {AddGroup.class, EditGroup.class})
@ListValue(vals = {0,1},groups = {AddGroup.class, EditGroup.class},message = "必須為0或者1")
private Integer showStatus;