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系統時間修改方法

java 修改系統時間方法

第一種方法：

需下載 jna.jar???????????????????????????

a) 創建 Kernel32 接口

package ?time.test;

import ?com.sun.jna.Native;

import ?com.sun.jna.Structure;

import ?com.sun.jna.win32.StdCallLibrary;

public ? interface ?Kernel32? extends ?StdCallLibrary

{

????Kernel32?INSTANCE? = ?(Kernel32)Native.loadLibrary( " kernel32 " ,?Kernel32. class );

???? public ?SYSTEMTIME?GetSystemTime();

???? public ? void ?SetLocalTime(SYSTEMTIME?localTime);

???? public ? static ? class ?SYSTEMTIME? extends ?Structure

???? {

???? // 必須有這么多個字段,按這個順序定義屬性

? ???????? public ? short ?wYear;

???????? public ? short ?wMonth;
?????????????public?short?wDayOfWeek;

???????? public ? short ?wDay;

???????? public ? short ?wHour;

???????? public ? short ?wMinute;

???????? public ? short ?wSecond;

???????? public ? short ?wMilliseconds;

???????

????}

}

b) 修改時間

?

import ?time.test.Kernel32.SYSTEMTIME;

public ? class ?SysTimeSettingDaoImp

{

???? protected ? void ?setLocalTime(String?time)

???? {

?????? // time時間格式是14位的字符串，如"20080108152130"

????????Short?year? = ?Short.parseShort(time.substring( 0 ,? 4 ));

????????Short?month? = ?Short.parseShort(time.substring( 4 ,? 6 ));

????????Short?day? = ?Short.parseShort(time.substring( 6 ,? 8 ));

????????Short?hour? = ?Short.parseShort(time.substring( 8 ,? 10 ));

????????Short?minute? = ?Short.parseShort(time.substring( 10 ,? 12 ));

????????Short?second? = ?Short.parseShort(time.substring( 12 ,? 14 ));

????????SYSTEMTIME?ss? = ? new ?SYSTEMTIME();

????????ss.setWYear(year);

????????ss.setWMonth(month);

????????ss.setWDay(day);

????????ss.setWHour(hour);

????????ss.setWMinute(minute);

????????ss.setWSecond(second);

????????Kernel32?lib? = ?Kernel32.INSTANCE;

????????lib.SetLocalTime(ss);

????}

}

第二種方法

?

public ? class ?MyTimeClass

{

???????????? // timeAndDate格式位14位的字符串表示形式。

???????????? public ? void ?setLocalTime(String?timeAndDate)

???????????? {

????????????????????????????String?date? = ?getDate(timeAndDate);

????????????????????????????String?time? = ?getTime(timeAndDate);

????????????

???????????????????????????? // ?修改系統日期和時間

????????????????????????????Runtime.getRuntime().exec( " cmd?/c?date? " ? + ?date);

????????????????????????????Runtime.getRuntime().exec( " cmd?/c?time? " ? + ?time);

????????????}

???????????? public ?String?getDate(String?timeAndDate)

???????????? {

????????????????????String?year? = ?timeAndDate.substring( 0 ,? 4 );

????????????????????String?month? = ?timeAndDate.substring( 4 ,? 6 );

????????????????????String?day? = ?timeAndDate.substring( 6 ,? 8 );

???????????????????? return ?year? + ? " - " ? + ?month? + ? " - " ? + ?day;

????????????}

???????????? public ?String?getTime(String?timeAndDate)

???????????? {

????????????????????String?hour? = ?timeAndDate.substring( 8 ,? 10 );

????????????????????String?minute? = ?timeAndDate.substring( 10 ,? 12 );

????????????????????String?second? = ?timeAndDate.substring( 12 ,? 14 );

???????????????????? return ?hour? + ? " : " ? + ?minute? + ? " : " ? + ?second;

????????????}

}

Linux系統修改時間

??String?os? = ?System.getProperty( " os.name " ).toLowerCase(); // 獲取操作系統名稱

if (os.indexOf( " windows " )? != ? - 1 )
{
????cmd? = ? " cmd?/c?time? " ? + ?timeStr;
????ProcessUtil.printErr(Runtime.getRuntime().exec(cmd));
????cmd? = ? " cmd?/c?date? " ? + ?timeStr;
????ProcessUtil.printErr(Runtime.getRuntime().exec(cmd));
???}
??? else
??? {??
????cmd? = ? " date? " ? + ?timeStr; //timeStr時間到分，先寫時間再寫日期
????ProcessUtil.printErr(Runtime.getRuntime().exec(cmd));
???}

public class ProcessUtil {
???
??? public static void printErr(Process p) {
??????? BufferedReader br = null;
??????? try {
??????????? br = new BufferedReader(new InputStreamReader(p.getErrorStream()));
??????????? String line = null;
??????????? while ((line = br.readLine()) != null) {
??????????????? System.out.println(line);
??????????? }
??????? } catch (Exception e) {
??????????? e.printStackTrace();
??????? } finally {
??????????? try {
??????????????? if (br != null)
??????????????????? br.close();
??????????? } catch (Exception e) {
??????????????? e.printStackTrace();
??????????? }
??????????? p.destroy();
??????? }
??? }
???
??? public static void printConsole(Process p) {
??????? BufferedReader br = null;
??????? try {
??????????? br = new BufferedReader(new InputStreamReader(p.getInputStream()));
??????????? String line = null;
??????????? while ((line = br.readLine()) != null) {
??????????????? System.out.println(line);
??????????? }
??????? } catch (Exception e) {
??????????? e.printStackTrace();
??????? } finally {
??????????? try {
??????????????? if (br != null)
??????????????????? br.close();
??????????? } catch (Exception e) {
??????????????? e.printStackTrace();
??????????? }
??????? }
??? }
???
??? public static String getErrInfo(Process p) {
??????? StringBuffer sb = new StringBuffer();
??????? BufferedReader br = null;
??????? try {
??????????? br = new BufferedReader(new InputStreamReader(p.getErrorStream()));
??????????? String line = null;
??????????? while ((line = br.readLine()) != null) {
??????????????? sb.append(line).append("\n");
??????????? }
??????????? return sb.toString();
??????? } catch (Exception e) {
??????????? e.printStackTrace();
??????? } finally {
??????????? try {
??????????????? if (br != null)
??????????????????? br.close();
??????????? } catch (Exception e) {
??????????????? e.printStackTrace();
??????????? }
??????? }
??????? return null;
??? }

}

?

posted on 2008-01-08 23:47 飄雪閱讀(1955) 評論(1) 編輯收藏所屬分類: JAVA技術


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# re: 系統時間修改方法 2008-09-19 09:33 jone

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