Java8时间工具类

package ele;

import java.util.Calendar;
import java.util.Date;


public enum DateUtil {
    MILLISECOND((type, calendar, val) -> {
        calendar.add(Calendar.MILLISECOND, val);
        if (!TypeEnum.SELF.equals(type)) {
            val = val < 0 ? -val : val;
            if (val < 10) {
                calendar.set(Calendar.MILLISECOND, calendar.get(Calendar.MILLISECOND) - calendar.get(Calendar.MILLISECOND) % 10 + (TypeEnum.FLOOR.equals(type) ? 9 : 0));
            } else if (val < 100) {
                calendar.set(Calendar.MILLISECOND, calendar.get(Calendar.MILLISECOND) - calendar.get(Calendar.MILLISECOND) % 100 + (TypeEnum.FLOOR.equals(type) ? 99 : 0));
            } else if (val < 1000) {
                calendar.set(Calendar.MILLISECOND, calendar.get(Calendar.MILLISECOND) - calendar.get(Calendar.MILLISECOND) % 1000 + (TypeEnum.FLOOR.equals(type) ? 999 : 0));
            }
        }
    }),
    SECOND((type, calendar, val) -> {
        calendar.add(Calendar.SECOND, val);
        if (TypeEnum.CEILING.equals(type)) {
            calendar.set(Calendar.MILLISECOND, 0);
        } else if (TypeEnum.FLOOR.equals(type)) {
            calendar.set(Calendar.MILLISECOND, 999);
        }
    }),
    MINUTE((type, calendar, val) -> {
        calendar.add(Calendar.MINUTE, val);
        if (TypeEnum.CEILING.equals(type)) {
            calendar.set(Calendar.MILLISECOND, 0);
            calendar.set(Calendar.SECOND, 0);
        } else if (TypeEnum.FLOOR.equals(type)) {
            calendar.set(Calendar.MILLISECOND, 999);
            calendar.set(Calendar.SECOND, 59);
        }
    }),
    HOUR((type, calendar, val) -> {
        calendar.add(Calendar.HOUR, val);
        if (TypeEnum.CEILING.equals(type)) {
            calendar.set(Calendar.MILLISECOND, 0);
            calendar.set(Calendar.SECOND, 0);
            calendar.set(Calendar.MINUTE, 0);
        } else if (TypeEnum.FLOOR.equals(type)) {
            calendar.set(Calendar.MILLISECOND, 999);
            calendar.set(Calendar.SECOND, 59);
            calendar.set(Calendar.MINUTE, 59);
        }
    }),
    DAY((type, calendar, val) -> {
        calendar.add(Calendar.DATE, val);
        if (TypeEnum.CEILING.equals(type)) {
            calendar.set(Calendar.MILLISECOND, 0);
            calendar.set(Calendar.SECOND, 0);
            calendar.set(Calendar.MINUTE, 0);
            calendar.set(Calendar.HOUR_OF_DAY, 0);
        } else if (TypeEnum.FLOOR.equals(type)) {
            calendar.set(Calendar.MILLISECOND, 999);
            calendar.set(Calendar.SECOND, 59);
            calendar.set(Calendar.MINUTE, 59);
            calendar.set(Calendar.HOUR_OF_DAY, 23);
        }
    }),
    WEEK((type, calendar, val) -> {
            calendar.add(Calendar.WEEK_OF_YEAR, val);
        if (TypeEnum.CEILING.equals(type)) {
            calendar.add(Calendar.DAY_OF_YEAR, 1 - calendar.get(Calendar.DAY_OF_WEEK));
            calendar.set(Calendar.MILLISECOND, 0);
            calendar.set(Calendar.SECOND, 0);
            calendar.set(Calendar.MINUTE, 0);
            calendar.set(Calendar.HOUR_OF_DAY, 0);
        } else if (TypeEnum.FLOOR.equals(type)) {
            calendar.add(Calendar.DAY_OF_YEAR, 7 - calendar.get(Calendar.DAY_OF_WEEK));
            calendar.set(Calendar.MILLISECOND, 999);
            calendar.set(Calendar.SECOND, 59);
            calendar.set(Calendar.MINUTE, 59);
            calendar.set(Calendar.HOUR_OF_DAY, 23);
        }
    }),
    MonTH((type, calendar, val) -> {
        calendar.add(Calendar.MONTH, val);
        if (TypeEnum.CEILING.equals(type)) {
            calendar.set(Calendar.DAY_OF_MONTH, 1);
            calendar.set(Calendar.MILLISECOND, 0);
            calendar.set(Calendar.SECOND, 0);
            calendar.set(Calendar.MINUTE, 0);
            calendar.set(Calendar.HOUR_OF_DAY, 0);
        } else if (TypeEnum.FLOOR.equals(type)) {
            calendar.add(Calendar.MONTH, 1);
            calendar.set(Calendar.MILLISECOND, 999);
            calendar.set(Calendar.SECOND, 59);
            calendar.set(Calendar.MINUTE, 59);
            calendar.set(Calendar.HOUR_OF_DAY, 23);
            calendar.set(Calendar.DAY_OF_MONTH, 1);
            calendar.add(Calendar.DAY_OF_YEAR, -1);
        }
    }),
    YEAR((type, calendar, val) -> {
        calendar.add(Calendar.YEAR, val);
        if (TypeEnum.CEILING.equals(type)) {
            calendar.set(Calendar.MILLISECOND, 0);
            calendar.set(Calendar.SECOND, 0);
            calendar.set(Calendar.MINUTE, 0);
            calendar.set(Calendar.HOUR_OF_DAY, 0);
            calendar.set(Calendar.DAY_OF_YEAR, 1);
        } else if (TypeEnum.FLOOR.equals(type)) {
            calendar.add(Calendar.YEAR, 1);
            calendar.set(Calendar.MILLISECOND, 999);
            calendar.set(Calendar.SECOND, 59);
            calendar.set(Calendar.MINUTE, 59);
            calendar.set(Calendar.HOUR_OF_DAY, 23);
            calendar.set(Calendar.DAY_OF_YEAR, 1);
            calendar.add(Calendar.DATE, -1);
        }
    }),
    ;

    DateConsumer rule;

    DateUtil(DateConsumer rule) {
        this.rule = rule;
    }

    
    public Date getCeiling() {
        Calendar calendar = Calendar.getInstance();
        rule.accept(TypeEnum.CEILING, calendar, 0);
        return calendar.getTime();
    }

    
    public Date getFloor() {
        Calendar calendar = Calendar.getInstance();
        rule.accept(TypeEnum.FLOOR, calendar, 0);
        return calendar.getTime();
    }

    
    public Date calculateAndGet(int offset) {
        Calendar calendar = Calendar.getInstance();
        rule.accept(TypeEnum.SELF, calendar, offset);
        return calendar.getTime();
    }

    
    public Date calculateAndGetCeiling(int offset) {
        Calendar calendar = Calendar.getInstance();
        rule.accept(TypeEnum.CEILING, calendar, offset);
        return calendar.getTime();
    }

    
    public Date calculateAndGetFloor(int offset) {
        Calendar calendar = Calendar.getInstance();
        rule.accept(TypeEnum.FLOOR, calendar, offset);
        return calendar.getTime();
    }

    
    public Date getForSubOne() {
        Calendar calendar = Calendar.getInstance();
        rule.accept(TypeEnum.SELF, calendar, -1);
        return calendar.getTime();
    }

    
    public Date getForAddOne() {
        Calendar calendar = Calendar.getInstance();
        rule.accept(TypeEnum.SELF, calendar, 1);
        return calendar.getTime();
    }

    
    public Date getCeilingForSubOne() {
        Calendar calendar = Calendar.getInstance();
        rule.accept(TypeEnum.CEILING, calendar, -1);
        return calendar.getTime();
    }

    
    public Date getFloorForSubOne() {
        Calendar calendar = Calendar.getInstance();
        rule.accept(TypeEnum.FLOOR, calendar, -1);
        return calendar.getTime();
    }

    
    public Date getCeilingForAddOne() {
        Calendar calendar = Calendar.getInstance();
        rule.accept(TypeEnum.CEILING, calendar, 1);
        return calendar.getTime();
    }

    
    public Date getFloorForAddOne() {
        Calendar calendar = Calendar.getInstance();
        rule.accept(TypeEnum.FLOOR, calendar, 1);
        return calendar.getTime();
    }

    
    public Date calculateAndGet(Date date, int offset) {
        Calendar calendar = Calendar.getInstance();
        calendar.setTime(date);
        rule.accept(TypeEnum.SELF, calendar, offset);
        return calendar.getTime();
    }

    
    public Date calculateAndGetCeiling(Date date, int offset) {
        Calendar calendar = Calendar.getInstance();
        calendar.setTime(date);
        rule.accept(TypeEnum.CEILING, calendar, offset);
        return calendar.getTime();
    }

    
    public Date calculateAndGetFloor(Date date, int offset) {
        Calendar calendar = Calendar.getInstance();
        calendar.setTime(date);
        rule.accept(TypeEnum.FLOOR, calendar, offset);
        return calendar.getTime();
    }

    
    public Date getForSubOne(Date date) {
        Calendar calendar = Calendar.getInstance();
        calendar.setTime(date);
        rule.accept(TypeEnum.SELF, calendar, -1);
        return calendar.getTime();
    }

    
    public Date getForAddOne(Date date) {
        Calendar calendar = Calendar.getInstance();
        calendar.setTime(date);
        rule.accept(TypeEnum.SELF, calendar, 1);
        return calendar.getTime();
    }

    
    public Date getCeilingForSubOne(Date date) {
        Calendar calendar = Calendar.getInstance();
        calendar.setTime(date);
        rule.accept(TypeEnum.CEILING, calendar, -1);
        return calendar.getTime();
    }

    
    public Date getFloorForSubOne(Date date) {
        Calendar calendar = Calendar.getInstance();
        calendar.setTime(date);
        rule.accept(TypeEnum.FLOOR, calendar, -1);
        return calendar.getTime();
    }

    
    public Date getCeilingForAddOne(Date date) {
        Calendar calendar = Calendar.getInstance();
        calendar.setTime(date);
        rule.accept(TypeEnum.CEILING, calendar, 1);
        return calendar.getTime();
    }

    
    public Date getFloorForAddOne(Date date) {
        Calendar calendar = Calendar.getInstance();
        calendar.setTime(date);
        rule.accept(TypeEnum.FLOOR, calendar, 1);
        return calendar.getTime();
    }

    @FunctionalInterface
    public interface DateConsumer {
        void accept(A a,B b,C c);
    }

    private enum TypeEnum {
        CEILING,
        FLOOR,
        SELF,
        ;
    }
}