两个时间相比，只精确到天以上，忽略时分秒

package com.business;

import java.util.Calendar;
import java.util.Date;
import java.util.GregorianCalendar;
import java.util.List;

import org.apache.commons.lang3.StringUtils;
import org.apache.commons.lang3.time.DateUtils;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;

import com.google.common.collect.Lists;

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations= "classpath:spring/applicationContext.xml")
public class DateUtilTest {
    
    public static void main(String[] args) {
        System.out.println("************************************************");
        System.out.println("************************************************");
        List ids = Lists.newArrayList(12L,123L,23L,432L,235L,235L);
        String itemIds = StringUtils.join(ids.toArray(), ",");
        System.out.println(itemIds);
        System.out.println("************************************************");
        System.out.println("************************************************");
    }

    @Test
    public void getSomeDateTest(){
        //截去一个时间的时分秒
        Date t = new Date();
        Date tt = DateUtils.truncate(t1, Calendar.DATE);
        //2017-05-24 10:26:50
        System.out.println(t);
        //2017-05-24 00:00:00
        System.out.println(tt);


        Date t1 = new Date();
        Calendar cal = new GregorianCalendar();
        cal.add(Calendar.DATE, 1);
        cal.add(Calendar.HOUR_OF_DAY, -1);
        Date t2 = cal.getTime();

        System.out.println(t1.toString());
        System.out.println(t2.toString());
        //时间比较，忽略时分秒
        System.out.println(DateUtils.truncatedCompareTo(t1, t2, Calendar.DATE));


    }
}