java
				
				
						修改系统时间方法
						
								
								
								
						
				
		
		
				
						第一种方法:
						
								
								
						
				
		
		
				需下载
				jna.jar                            
		
		
				a)
				创建
				Kernel32
				接口
		
		
				 package
				 time.test;
				package
				 time.test;

 import
				 com.sun.jna.Native;
				import
				 com.sun.jna.Native;
 import
				 com.sun.jna.Structure;
				import
				 com.sun.jna.Structure;
 import
				 com.sun.jna.win32.StdCallLibrary;
				import
				 com.sun.jna.win32.StdCallLibrary;

 public
				 
				interface
				 Kernel32 
				extends
				 StdCallLibrary
				public
				 
				interface
				 Kernel32 
				extends
				 StdCallLibrary

 
				
						 {
				
				
						{
 Kernel32 INSTANCE 
						=
						 (Kernel32)Native.loadLibrary(
						"
						kernel32
						"
						, Kernel32.
						class
						);
    Kernel32 INSTANCE 
						=
						 (Kernel32)Native.loadLibrary(
						"
						kernel32
						"
						, Kernel32.
						class
						);
 public
						 SYSTEMTIME GetSystemTime();
    
						public
						 SYSTEMTIME GetSystemTime();

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

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

 
    
						
								 {
						
						
								{
 //
								必须有这么多个字段,按这个顺序定义属性
    
								//
								必须有这么多个字段,按这个顺序定义属性
								
										
										 public
								 
								short
								 wYear;
 
								        
								public
								 
								short
								 wYear;
 public
								 
								short
								 wMonth;
        
								public
								 
								short
								 wMonth;
             public short wDayOfWeek;
 public
								 
								short
								 wDay;
        
								public
								 
								short
								 wDay;
 public
								 
								short
								 wHour;
        
								public
								 
								short
								 wHour;
 public
								 
								short
								 wMinute;
        
								public
								 
								short
								 wMinute;
 public
								 
								short
								 wSecond;
        
								public
								 
								short
								 wSecond;
 public
								 
								short
								 wMilliseconds;
        
								public
								 
								short
								 wMilliseconds;
 
       
								
										 }
    }
						
						
								
								 }
}
				
				
						
						 
				
		 
		
				
						b)
				
				修改时间
		
		 
		
				 import
				 time.test.Kernel32.SYSTEMTIME;
				import
				 time.test.Kernel32.SYSTEMTIME;


 public
				 
				class
				 SysTimeSettingDaoImp
				public
				 
				class
				 SysTimeSettingDaoImp

 
				
						 {
				
				
						{
 protected
						 
						void
						 setLocalTime(String time)
    
						protected
						 
						void
						 setLocalTime(String time)

 
    
						
								 {
						
						
								{
 //
								time时间格式是14位的字符串,如"20080108152130"
      
								//
								time时间格式是14位的字符串,如"20080108152130"
								
										
										 Short year 
								=
								 Short.parseShort(time.substring(
								0
								, 
								4
								));
								
								        Short year 
								=
								 Short.parseShort(time.substring(
								0
								, 
								4
								));
 Short month 
								=
								 Short.parseShort(time.substring(
								4
								, 
								6
								));
        Short month 
								=
								 Short.parseShort(time.substring(
								4
								, 
								6
								));
 Short day 
								=
								 Short.parseShort(time.substring(
								6
								, 
								8
								));
        Short day 
								=
								 Short.parseShort(time.substring(
								6
								, 
								8
								));
 Short hour 
								=
								 Short.parseShort(time.substring(
								8
								, 
								10
								));
        Short hour 
								=
								 Short.parseShort(time.substring(
								8
								, 
								10
								));
 Short minute 
								=
								 Short.parseShort(time.substring(
								10
								, 
								12
								));
        Short minute 
								=
								 Short.parseShort(time.substring(
								10
								, 
								12
								));
 Short second 
								=
								 Short.parseShort(time.substring(
								12
								, 
								14
								));
        Short second 
								=
								 Short.parseShort(time.substring(
								12
								, 
								14
								));

 SYSTEMTIME ss 
								=
								 
								new
								 SYSTEMTIME();
        SYSTEMTIME ss 
								=
								 
								new
								 SYSTEMTIME();
 ss.setWYear(year);
        ss.setWYear(year);
 ss.setWMonth(month);
        ss.setWMonth(month);
 ss.setWDay(day);
        ss.setWDay(day);
 ss.setWHour(hour);
        ss.setWHour(hour);
 ss.setWMinute(minute);
        ss.setWMinute(minute);
 ss.setWSecond(second);
        ss.setWSecond(second);

 Kernel32 lib 
								=
								 Kernel32.INSTANCE;
        Kernel32 lib 
								=
								 Kernel32.INSTANCE;
 lib.SetLocalTime(ss);
        lib.SetLocalTime(ss);
 }
    }
						
						
								
								 }
}
				
				
						
						 
				
		 
		
				
						第二种方法
						
								
								
						
				
		
		 
		
				 public
				 
				class
				 MyTimeClass
				public
				 
				class
				 MyTimeClass

 
				
						 {
				
				
						{
 //
						timeAndDate格式位14位的字符串表示形式。
            
						//
						timeAndDate格式位14位的字符串表示形式。
						
								
								 public
						 
						void
						 setLocalTime(String timeAndDate)
						
						            
						public
						 
						void
						 setLocalTime(String timeAndDate)

 
            
						
								 {
						
						
								{
 String date 
								=
								 getDate(timeAndDate);
                            String date 
								=
								 getDate(timeAndDate);
 String time 
								=
								 getTime(timeAndDate);
                            String time 
								=
								 getTime(timeAndDate);
 
            
 //
								 修改系统日期和时间
                            
								//
								 修改系统日期和时间
								
										
										 Runtime.getRuntime().exec(
								"
								cmd /c date 
								"
								 
								+
								 date);
								
								                            Runtime.getRuntime().exec(
								"
								cmd /c date 
								"
								 
								+
								 date);
 Runtime.getRuntime().exec(
								"
								cmd /c time 
								"
								 
								+
								 time);
                            Runtime.getRuntime().exec(
								"
								cmd /c time 
								"
								 
								+
								 time);
 }
            }
						
						
								
								 public
						 String getDate(String timeAndDate)
            
						public
						 String getDate(String timeAndDate)

 
            
						
								 {
						
						
								{
 String year 
								=
								 timeAndDate.substring(
								0
								, 
								4
								);
                    String year 
								=
								 timeAndDate.substring(
								0
								, 
								4
								);
 String month 
								=
								 timeAndDate.substring(
								4
								, 
								6
								);
                    String month 
								=
								 timeAndDate.substring(
								4
								, 
								6
								);
 String day 
								=
								 timeAndDate.substring(
								6
								, 
								8
								);
                    String day 
								=
								 timeAndDate.substring(
								6
								, 
								8
								);
 return
								 year 
								+
								 
								"
								-
								"
								 
								+
								 month 
								+
								 
								"
								-
								"
								 
								+
								 day;
                    
								return
								 year 
								+
								 
								"
								-
								"
								 
								+
								 month 
								+
								 
								"
								-
								"
								 
								+
								 day;
 }
            }
						
						
								
								 public
						 String getTime(String timeAndDate)
            
						public
						 String getTime(String timeAndDate)

 
            
						
								 {
						
						
								{
 String hour 
								=
								 timeAndDate.substring(
								8
								, 
								10
								);
                    String hour 
								=
								 timeAndDate.substring(
								8
								, 
								10
								);
 String minute 
								=
								 timeAndDate.substring(
								10
								, 
								12
								);
                    String minute 
								=
								 timeAndDate.substring(
								10
								, 
								12
								);
 String second 
								=
								 timeAndDate.substring(
								12
								, 
								14
								);
                    String second 
								=
								 timeAndDate.substring(
								12
								, 
								14
								);
 return
								 hour 
								+
								 
								"
								:
								"
								 
								+
								 minute 
								+
								 
								"
								:
								"
								 
								+
								 second;
                    
								return
								 hour 
								+
								 
								"
								:
								"
								 
								+
								 minute 
								+
								 
								"
								:
								"
								 
								+
								 second;
 }
            }
						
						
								
								 }
}
				
				
						
						 
				
		 
		Linux系统修改时间