code:

package com.soofound.framework.util;import java.io.IOException;import java.io.InputStream;import java.text.SimpleDateFormat;import java.util.Calendar;import java.util.TimeZone;/** * 设置时区 *  * @author zxf * @date 2015-11-4 */// java -classpath . com.linux.test.base.SetTimeZonepublic class SetTimeZone {    public static void main(String[] args) {        setTimeZone();        SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");        String time1 = df.format(Calendar.getInstance().getTime());        System.out.println(time1);    }    /**     * 设置时区 
     *      * 注：xx:59:59时，可能有问题。可以循环2次验证后再设置     */    public static void setTimeZone() {        SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH");        String time = df.format(Calendar.getInstance().getTime());        /**         * 如果当前java获取的时间与linux的'date'命令获取的时间一致，则不修改时区         */        String osTime = time();        System.out.println("def java time: " + time + ", os time: " + osTime);        if ( time.equals(osTime) ) {            return;        }        /**         * 先获取往前减的时区         */        TimeZone correct = getCorrect("GMT-%d");// 如: GMT-8 ()        /**         * 往前减的时区没有，则获取往后加的时区         */        if ( correct == null ) {            correct = getCorrect("GMT+%d");// 如: GMT+8        }        /**         * 如果找到正确的时区，则设置为默认时区         */        if ( correct != null ) {            System.out.printf("set TimeZone: %s %n", correct.getID());            osTime = time();            SimpleDateFormat df1 = new SimpleDateFormat("yyyy-MM-dd HH");            String time1 = df1.format(Calendar.getInstance().getTime());            System.out.println("set . java time: " + time1 + ", os time: " + osTime);            TimeZone.setDefault(correct);        }    }    /**     * 时区区间：1-16，一般1-12就可以了     *      * @param format     * @return     */    private static TimeZone getCorrect(String format) {        SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH");        for ( int i = 1; i <= 16; i++ ) {            String tzName = String.format(format, i);// 减 | 加            TimeZone tz = TimeZone.getTimeZone(tzName);            df.setTimeZone(tz);            String time = df.format(Calendar.getInstance().getTime());            String linexTime = time();            if ( time.equals(linexTime) ) {                return tz;            }        }        return null;    }    /**     * 获取系统时间     *      * @return     */    private static String time() {        try {            String cmd = "date '+%F %H'";            Process pro = Runtime.getRuntime().exec(new String[] { "sh", "-c", cmd });            InputStream is = pro.getInputStream();            byte[] bs = new byte[1024];            int len = is.read(bs, 0, 1024);            String time = new String(bs, 0, len);            if ( time != null )                time = time.trim();            return time;        } catch ( IOException e ) {            return null;            // return "2015-11-04 19";// windows test        } catch ( Exception e ) {            e.printStackTrace();            return null;        }    }}