Java中JSR303的基本使用详情

@Data
public class Emp {
    //不能为空且不能为空串
    @NotBlank(message = "账号不能为空")
    private String username;
}

@PostMapping("/emp/add")
public Result demo1(@Valid Emp emp,@NotBlank String email){
    return Result.success(200,"成功");
}

@Data
public class Emp implements Serializable {

    //不能为空且不能为空串(调用trim()后)
    @NotBlank(message = "账号不能为空")
    private String username;
    
    @Valid //需要加上，否则不会验证Dept类中的校验注解
    @NotNull //并且需要触发该字段的验证才会进行嵌套验证。
    private Dept dept;
}
@Data
public class Dept implements Serializable {
    
    @NotBlank(message = "deptNameb不能为空")
    private String deptName;
}

public interface IGroup {
	
    interface ReGIStry extends Default {}

    interface Update extends Default {}
}

@Data
public class Emp implements Serializable {

    //当校验的组为update时才校验该字段
    @NotNull(message = "编号不能为空",groups = {IGroup.Update.class})
    @Min(value = 1,groups = {IGroup.Update.class})
    private Integer empNo;

    //不能为空且不能为空串(调用trim()后)
    @NotBlank(message = "账号不能为空")
    private String username;

    @Pattern(regexp = "^[0-9A-z]{10,18}$",message = "密码只能使用数字+字母",groups = IGroup.Registry.class)
    private String passWord;

    @Valid
    @NotNull
    private Dept dept;
}

@PostMapping("/emp/add")          //指定需要校验的组
public Result addEmp(@RequestBody @Validated(IGroup.Registry.class) Emp emp){
    return Result.success(200,"成功");
}

@GroupSequence({Default.class,IGroup.Update.class, IGroup.Registry.class})
public interface IGroup {

    interface Registry extends Default {}

    interface Update extends Default {}
}

@PostMapping("/emp/add")
public Result addEmp(@RequestBody @Validated({IGroup.class}) Emp emp){
    return Result.success(200,"成功");
}

public interface CaseMode{
   String UPPER="大写";
   String LOWER="小写";
}

@Target({ FIELD, METHOD, PARAMETER, ANNOTATION_TYPE, TYPE_USE })
@Retention(RUNTIME)
@Constraint(validatedBy = CheckCaseValidator.class) //指定自定义验证器
@Documented
@Repeatable(CheckCase.List.class) //表示可以在同一位置重复多次
public @interface CheckCase {

    //默认的错误信息
    String message() default "{verification.default.ErrORMessage}";

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

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

    String value();

    @Target({ FIELD, METHOD, PARAMETER, ANNOTATION_TYPE })
    @Retention(RUNTIME)
    @Documented
    @interface List {
        CheckCase[] value();
    }
}

public class CheckCaseValidator implements ConstraintValidator<CheckCase, String> {
    private String caseMode;
    @Override
    public void initialize(CheckCase constraintAnnotation) {
        this.caseMode = constraintAnnotation.value();
    }
    
    @Override
    public boolean isValid(String value, ConstraintValidatorContext context) {
        if ( value == null ) {
            return true;
        }

        if (CaseMode.UPPER.equals(caseMode) ) {
            return value.equals( value.toUpperCase() );
        }
        else {
            return value.equals( value.toLowerCase() );
        }
    }
}

@RestControllerAdvice
public class GlobalExceptionHandler {
    
    
    @ExceptionHandler(BindException.class)
    public HashMap<String, String> bindExceptionHandler(BindException e){
        HashMap<String, String> map = new HashMap<>();
        e.getBindingResult().getFieldErrors().forEach(field -> {
            map.put(field.getField(), field.getDefaultMessage());
        });
        return map;
    }

    
    @ExceptionHandler(MethodArgumentNotValidException.class)
    public HashMap<String, String> methodArgumentNotValidException(MethodArgumentNotValidException e){
        HashMap<String, String> map = new HashMap<>();
        e.getBindingResult().getFieldErrors().forEach(field -> {
            map.put(field.getField(), field.getDefaultMessage());
        });
        return map;
    }

    
    @ExceptionHandler(ConstraintViolationException.class)
    public HashMap<String, String> handle(ConstraintViolationException e) {
        HashMap<String, String> map = new HashMap<>();
        e.getConstraintViolations().forEach(item->{
            map.put(item.getPropertyPath().toString(),item.getMessage());
        });
        return map;
    }
}

@PostMapping("/emp/test")
public Result test(@Validated Emp emp, BindingResult validResult){
    if (validResult.hasErrors()){
        HashMap<String, String> map = new HashMap<>();
        validResult.getFieldErrors().forEach(error->{
            map.put(error.getField(),error.getDefaultMessage());
        });
        return Result.error(httpstatus.BAD_REQUEST.value(),map);
    }
    return Result.success(HttpStatus.OK.value(),"成功");
}

@SpringBootTest
public class ValidatorTest {
    private static Validator validator = Validation.byProvider(HibernateValidator.class)
            .configure()
            .failFast(false) // 是否开启快速失败模式
            .buildValidatorFactory()
            .getValidator();
    @Test
    public void test1(){
        Emp emp = new Emp();
        //单独校验某个属性
        //Set<ConstraintViolation<Emp>> validProperty = validator.validateProperty(emp, "username");
        //检验对象
        Set<ConstraintViolation<Emp>> validBean = validator.validate(emp);
        Iterator<ConstraintViolation<Emp>> iterator = validBean.iterator();
        while (iterator.hasNext()){
            ConstraintViolation<Emp> next = iterator.next();
            String property = next.getPropertyPath().toString();
            String message = next.getMessage();
            System.out.println(property+":"+message);
        }

    }
}