JAVA问题总结之30--输出当前精度为毫秒的时间并且按时间批量建立文件

<span style="font-family: Arial, Helvetica, sans-serif; background-color: rgb(255, 255, 255);">JAVA问题总结之30--输出当前精度为毫秒的时间并且按时间批量建立文件</span>
1.TimeByMs.java

package java1;
import java.util.Date;
import  java.text.*;
public class TimeByMs {

public static void main(String[] args) {
// TODO Auto-generated method stub
System.out.println(new SimpleDateFormat("yyyyMMddHHmmssSSS") .format(new Date() ));
}

}

结果：

20160128212329624

2.FileTimeByMs.java

如果存在则删除文件和文件夹，然后隔一秒建立一个文件
package java1;
import java.util.Date;
import java.io.File;
import java.io.IOException;
import java.text.*;
public class FileTimeByMs {

public static void main(String[] args) {
// TODO Auto-generated method stub
File f0=new File("file100");
if (f0.exists()){
int n=f0.listFiles().length;
for(int i=0;i<n;i++){
//System.out.println(f0.listFiles().length+"--"+f0.listFiles()[i]);
System.out.println("file delete:"+f0.listFiles()[0].delete()+"\n");
}
f0.delete();
// f0.mkdir();
}else{
// f0.mkdir();
}
f0.mkdir();

System.out.println(new SimpleDateFormat("yyyyMMddHHmmssSSS") .format(new Date() ));

for(int i=1;i<=10;i++){
try {
Thread.sleep(1000);
} catch (InterruptedException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
String iString=new SimpleDateFormat("yyyyMMddHHmmssSSS") .format(new Date() );
String s1=f0+"/"+iString+".txt";
File f1=new File(s1);
try {
System.out.print(i+":"+f1.createNewFile()+" ");
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
// f1.close();
}
}

}


结果：

16--file100\20160128211832977.txt
file delete:true

15--file100\20160128211958655.txt
file delete:true

14--file100\20160128212002658.txt
file delete:true

13--file100\20160128212042166.txt
file delete:true

12--file100\20160128212044167.txt
file delete:true

11--file100\20160128212046169.txt
file delete:true

10--file100\20160128212048169.txt
file delete:true

9--file100\20160128212050170.txt
file delete:true

20160128212431728
1:true 2:true 3:true 4:true 5:true 6:true 7:true 8:true 9:true 10:true