javax.validation自定义日期范围校验注解操作

 // 前端传字符串如‘2020-07-13 09:09:09' springmvc接收并转换为LocalDateTime类型 @JsonFormat(shape = JsonFormat.Shape.STRING, pattern = "yyyy-MM-dd HH:mm:ss", timezone = "GMT+8") private LocalDateTime endTime; LocalDateTime now = LocalDateTime.now(); // jdk8校验传入日期是否为一年内 boolean flag = endTime.isBefore(now.plusYears(1)) 

 /** * 日期时间范围校验注解，可作用于LocalDateTime or 字符串型年月日时分秒（格式可通过pattern属性指定） * * @author meilin.huang * @date 2020-07-09 1:51 下午 */ @Target({ElementType.METHOD, ElementType.FIELD, ElementType.ANNOTATION_TYPE, ElementType.CONSTRUCTOR, ElementType.PARAMETER, ElementType.TYPE_USE}) @Retention(RetentionPolicy.RUNTIME) @Documented @Constraint(validatedBy = DateTimeRange.DateTimeRangeValidator.class) public @interface DateTimeRange { /** * 最小时间范围（为负数即为前n unit） */ int min() default 0; int max() default Integer.MAX_VALUE; /** * 时间单位 (年月日) */ RangeUnit unit() default RangeUnit.DAYS; /** * 作用于字符串时，指定的格式，包含年月日时分秒 */ String pattern() default "yyyy-MM-dd HH:mm:ss"; /** * 是否忽略更小的单位，即比当前指定的unit更小的单位（如unit为Days，则忽略hours，minutes, second） */ boolean ignoreLowerUnit() default false; /** * 错误提示 */ String message() default "日期时间错误"; /** * 用于分组校验 */ Class[] groups() default {}; Class[] payload() default {}; class DateTimeRangeValidator implements ConstraintValidator { private DateTimeRange dateTimeRange; @Override public void initialize(DateTimeRange dateRange) { this.dateTimeRange = dateRange; } @Override public boolean isValid(Object value, ConstraintValidatorContext context) { if (value == null) { return true; } LocalDateTime ta = getByValue(value); if (ta == null) { return false; } RangeUnit unit = dateTimeRange.unit(); int min = dateTimeRange.min(); int max = dateTimeRange.max(); // 忽略更小单位时，计算两个时间的单位差值比较即可 if (dateTimeRange.ignoreLowerUnit()) { long between = RangeUnit.getBetween(dateTimeRange.unit(), LocalDateTime.now(), ta); return between >= min && between <= max; } LocalDateTime now = LocalDateTime.now(); return ta.isAfter((ChronoLocalDateTime) RangeUnit.plus(now, unit, min)) && ta.isBefore((ChronoLocalDateTime) RangeUnit.plus(now, unit, max)); } private LocalDateTime getByValue(Object value) { if (value instanceof LocalDateTime) { return (LocalDateTime) value; } if (value instanceof String) { try { return LocalDateTime.parse((String) value, DateTimeFormatter.ofPattern(dateTimeRange.pattern())); } catch (Exception e) { return null; } } return null; } } } 

 /** * 日期范围校验，作用于 {@link LocalDate} or 字符串（年月日，格式可通过pattern属性指定，默认格式为: yyyy-MM-dd） * * @author meilin.huang * @date 2020-07-08 5:15 下午 */ @Target({ElementType.METHOD, ElementType.FIELD, ElementType.ANNOTATION_TYPE, ElementType.CONSTRUCTOR, ElementType.PARAMETER, ElementType.TYPE_USE}) @Retention(RetentionPolicy.RUNTIME) @Documented @Constraint(validatedBy = DateRange.DateRangeValidator.class) public @interface DateRange { /** * 最小时间范围（为负数即为前n unit） */ int min() default 0; int max() default Integer.MAX_VALUE; /** * 时间单位 (年月日) */ RangeUnit unit() default RangeUnit.DAYS; /** * 作用于字符串时，指定的格式，只能包含年月日不包含时间 */ String pattern() default "yyyy-MM-dd"; /** * 是否忽略更小的单位，即比当前指定的unit更小的单位（如unit为Month，则忽略Days） */ boolean ignoreLowerUnit() default false; /** * 错误提示 */ String message() default "日期错误"; /** * 用于分组校验 */ Class[] groups() default {}; Class[] payload() default {}; class DateRangeValidator implements ConstraintValidator { private DateRange dateRange; @Override public void initialize(DateRange dateRange) { this.dateRange = dateRange; } @Override public boolean isValid(Object value, ConstraintValidatorContext context) { if (value == null) { return true; } LocalDate ta = getByValue(value); if (ta == null) { return false; } // 忽略更小单位时，计算两个时间的单位差值比较即可 if (dateRange.ignoreLowerUnit()) { long between = RangeUnit.getBetween(dateRange.unit(), LocalDate.now(), ta); return between >= dateRange.min() && between <= dateRange.max(); } LocalDate now = LocalDate.now(); RangeUnit unit = dateRange.unit(); ChronoLocalDate min = (ChronoLocalDate) RangeUnit.plus(now, unit, dateRange.min()); ChronoLocalDate max = (ChronoLocalDate) RangeUnit.plus(now, unit, dateRange.max()); return (ta.isAfter(min) || ta.isEqual(min)) && (ta.isBefore(max) || ta.isEqual(max)); } private LocalDate getByValue(Object value) { if (value instanceof LocalDate) { return (LocalDate) value; } if (value instanceof String) { try { return LocalDate.parse((String) value, DateTimeFormatter.ofPattern(dateRange.pattern())); } catch (Exception e) { return null; } } if (value instanceof LocalDateTime) { return ((LocalDateTime) value).toLocalDate(); } return null; } } } 

 /** * @author meilin.huang * @date 2020-07-09 2:06 下午 */ public enum RangeUnit { /** * 年 */ YEAR, MONTH, DAYS, WEEKS, HOURS, MINUTES, SECOND; public static Temporal plus(Temporal date, RangeUnit unit, long value) { switch (unit) { case DAYS: return date.plus(value, ChronoUnit.DAYS); case MONTH: return date.plus(value, ChronoUnit.MONTHS); case YEAR: return date.plus(value, ChronoUnit.YEARS); case WEEKS: return date.plus(value, ChronoUnit.WEEKS); case HOURS: return date.plus(value, ChronoUnit.HOURS); case MINUTES: return date.plus(value, ChronoUnit.MINUTES); case SECOND: return date.plus(value, ChronoUnit.SECONDS); default: return date; } } public static long getBetween(RangeUnit unit, Temporal date, Temporal date2) { switch (unit) { case DAYS: return ChronoUnit.DAYS.between(date, date2); case MONTH: return ChronoUnit.MONTHS.between(date, date2); case YEAR: return ChronoUnit.YEARS.between(date, date2); case WEEKS: return ChronoUnit.WEEKS.between(date, date2); case HOURS: return ChronoUnit.HOURS.between(date, date2); case MINUTES: return ChronoUnit.MINUTES.between(date, date2); case SECOND: return ChronoUnit.SECONDS.between(date, date2); default: return 0; } } } 

 public class ValidatorUtilsTest extends TestCase { public static class User { /** * createTime必须在当前日期的前一个月以及后一个月访问内，忽略day的比较 * 即计算当前时间与传入createTime的月份差是否在最小与最大值范围内 */ @DateRange(min = -1, max = 1, unit = RangeUnit.MONTH, ignoreLowerUnit = true, message = "createTime范围错误") String createTime = "2020-06-09"; /** * date必须为当前日期时间的后一个月至后两月内 */ @DateTimeRange(min = 1, max = 2, unit = RangeUnit.MONTH, message = "date范围错误") String date = "2020-08-15 09:18:00"; @DateTimeRange(min = 10, max = 30, message = "endTime日期范围错误") LocalDateTime endTime = LocalDateTime.now().plusDays(30); } @Test public void testValidate() { ValidationResult validate = ValidatorUtils.validate(new User()); System.out.println(validate); } }