[Java基础]-- 修改操作系统时间(linux和windows)

创建一个实现类 TestModifySysDate

代码如下，可以按需修改。

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStreamReader;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Locale;
import java.util.TimeZone;
import org.junit.Test;
public class TestModifySysDate {
  @Test
  public void getSysdate1(){
    DateFormat   chinaFormatter=DateFormat.getDateTimeInstance(DateFormat.MEDIUM,DateFormat.MEDIUM,Locale.CHINA);  
      DateFormat   defaultFormatter=DateFormat.getDateTimeInstance();  
      Date   now=new   Date();
      DateFormat   gmt08Formatter=DateFormat.getDateTimeInstance();  
      TimeZone   timezone=TimeZone.getTimeZone( "GMT 08:00 ");  
      gmt08Formatter.setTimeZone(timezone);  //格式日期/时间 
      String   defaultDateTime=defaultFormatter.format(now); 
      String   chinaDateTime=chinaFormatter.format(now);  
      String   gmt08DateTime=gmt08Formatter.format(now);  
      System.out.print( defaultDateTime+"  " +chinaDateTime+"  "+ gmt08DateTime);  
  }
  
  @Test
  //修改window7时间
  public void modifyTime(){
    try {
         Process p = Runtime.getRuntime().exec("cmd /c time 08:55:00");
      //   p.waitFor();
         BufferedReader br = new BufferedReader(new InputStreamReader(p.getInputStream()));

         if (!br.ready()) {
          Thread.sleep(100);
         }
         while (true) {
          String s = br.readLine();
          if (s == null)
           break;
          System.out.println(s);
         }
         br.close();
        } catch (Exception e) {
         e.printStackTrace();
        }
  }
  
  @Test
  //修改windows7日期
  public void modifyDate(){
     String date="2015-06-15";
            try{
              Runtime run=Runtime.getRuntime();
                String command="cmd.exe /c date"+" "+(date);     
                run.exec(command); 
            }
            catch(Exception e)
            {
             e.printStackTrace();
            }
  }
  //linux下修改时间和日期
public static  void main(String args[]) throws Exception{
       FileWriter excutefw = new FileWriter("/usr/updateSysTime.sh");
        BufferedWriter excutebw=new  BufferedWriter(excutefw);
        excutebw.write("date -s \"2015-12-01 00:00:00\"\r\n");
        excutebw.write("clock -w");
        excutebw.close();
        excutefw.close();
        String cmd_date ="sh /usr/updateSysTime.sh";
        Runtime.getRuntime().exec(cmd_date);
  }
}
}