Java acquisition time and system time difference 8 hours the ultimate solution __java

Source: Internet
Author: User
Tags local time set time

First, the problem description: MyEclipse directly using the BEA\JDK142_04 JVM environment, the project log is always played 8 hours slower than the system time, and then directly using System.out.println (new Java.util.Date ()); It really is 8 hours slower than the system in the lower right corner.

Second, the problem-solving solution:

1. Set time zone---before taking the date >>>

TimeZone TZ = Timezone.gettimezone ("etc/gmt-8");
Timezone.setdefault (TZ);

This method is suitable for a single rapid acquisition of system local time

2. Set java command Parameters

Java-duser.timezone=asia/jerusalem datetest

3, set the default time zone for the JVM is East eight (Beijing time)--->>>

in the following four directories (BEA\JDK142_11\JRE\LIB\ZI\ETC, Bea\jdk142_11\jre\lib\zi, bea\jrockit81sp6_142_10\jre\lib\zi\etc, Bea\jrockit81sp6_142_10\jre\lib\zi) find GMT file Bak backup, Then duplicate a copy of GMT-8 and rename it to GMT, copy it, rerun the Java program problem to solve.

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