JVM默认时区为:Asia/Shanghai与java程序中GMT+08不一致异常

 import java.text.SimpleDateFormat;
import java.util.Date;

/**
 * @author Ashen
 * @date 16/07/2019
 */
public class Test {

	public static SimpleDateFormat sdf = new SimpleDateFormat("yyyy.MM.dd HH:mm:ss");

	static int[] offsets = {
			28800000,
			29143000,
			32400000,
			3600000
	};
	public static void main(String[] args) {
		test2();
	}

	public static void test1(){
		Date date0 = new Date(1986 - 1900, 07 - 1, 29);
		Date date1 = new Date(1980 - 1900, 07 - 1, 29);
		Date date2 = new Date(1988 - 1900, 07 - 1, 29);
	}

	public static void test2() {
		// 以下为JVM中时区为：Asia/Shanghai时的偏移量参数值（共9对,分别为9年夏令时的开启与结束点）
		long transitions[] = {
				-9048018124799999L,
				-8918966038528000L,
				-3823593062399950L,
				-3781140480000000L,
				-3722379263999950L,
				-3651969024000000L,
				2111569920000050L,
				2158623129600000L,
				2232955699200050L,
				2287440691200000L,
				2361773260800050L,
				2416258252800000L,
				2493068083200050L,
				2547553075200000L,
				2621885644800050L,
				2676370636800000L,
				2750703206400050L,
				2805188198400000L,
				8660385792000000L
		};
		for(int i=0;i<18;i++){
			Long longTime = transitions[i] >> 12;
			Long field2 = transitions[i] << 52 >> 60;
			Long field3 = transitions[i] << 56 >> 60;
			Long field4 = transitions[i] << 60 >> 60;
			Date date = new Date(longTime);
			System.out.println("时间"+getIndexStr(i)+": "+sdf.format(date)+" 保留值>>"+field2+" 日光节约量 >> "+getOffset(field3)+" GMT偏移量 >> "+getOffset(field4));
		}

	}

	public static String getIndexStr(int i){
		if(i<10) return "0"+i;
		else return String.valueOf(i);
	}

	public static String getOffset(long offset){
		return offsets[(int)offset]/(1000 *60* 60)+"小时，";
	}

}