package?com.test;
import?java.util.*;
public?class?TestUUID?{

	/**
	?*?@param?args
	?*/
	public?static?void?main（String[]?args）?{
		//?TODO?Auto-generated?method?stub
		String?uuid=UUID.randomUUID（）.toString（）;
		System.out.println（uuid）;
		//比如我們上傳文件名????然后改為uuid.jpg
		String?fileName=“sunset.jpg“;
		int?beginIndex=fileName.lastIndexOf（“.“）;
		String?newFilename=uuid+fileName.substring（beginIndex?fileName.length（））;
		System.out.println（newFilename）;
		/*String?str=“abcdefg“;
		String?str1=str.substring（24）;
		System.out.println（str1）;*/
		

	}

}

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----

?????文件????????131??2016-09-12?23:30??dbinfo.properties

?????文件????????210??2016-09-14?10:53??readme.txt

?????文件????????569??2016-09-14?09:46??Clouddriver1\.classpath

?????文件????????309??2016-09-14?09:46??Clouddriver1\.mymetadata

?????文件????????254??2016-09-14?09:46??Clouddriver1\.mystrutsdata

?????文件???????1368??2016-09-14?09:46??Clouddriver1\.project

?????文件????????330??2016-09-14?09:46??Clouddriver1\.settings\org.eclipse.jdt.core.prefs

?????文件????????595??2016-09-14?09:46??Clouddriver1\src\com\test\TestUUID.java

?????文件???????1190??2016-09-14?09:46??Clouddriver1\src\com\yun\action\AddFriendAction.java

?????文件???????1547??2016-09-14?09:46??Clouddriver1\src\com\yun\action\DeleteFileAction.java

?????文件????????974??2016-09-14?09:46??Clouddriver1\src\com\yun\action\DelFriendAction.java

?????文件???????2502??2016-09-14?09:46??Clouddriver1\src\com\yun\action\DownloadFileAction.java

?????文件????????929??2016-09-14?09:46??Clouddriver1\src\com\yun\action\FreshAction.java

?????文件???????1178??2016-09-14?09:46??Clouddriver1\src\com\yun\action\LoginAction.java

?????文件???????3112??2016-09-14?09:46??Clouddriver1\src\com\yun\action\RegisterAction.java

?????文件????????954??2016-09-14?09:46??Clouddriver1\src\com\yun\action\RegisterUserAction.java

?????文件???????1475??2016-09-14?09:46??Clouddriver1\src\com\yun\action\ShareAction.java

?????文件???????1518??2016-09-14?09:46??Clouddriver1\src\com\yun\action\UserListAction.java

?????文件????????568??2016-09-14?09:46??Clouddriver1\src\com\yun\domain\Friend.java

?????文件????????773??2016-09-14?09:46??Clouddriver1\src\com\yun\domain\Relation.java

?????文件????????642??2016-09-14?09:46??Clouddriver1\src\com\yun\domain\ShareFile.java

?????文件????????519??2016-09-14?09:46??Clouddriver1\src\com\yun\domain\UserInfo.java

?????文件????????651??2016-09-14?09:46??Clouddriver1\src\com\yun\domain\Users.java

?????文件???????3266??2016-09-14?09:46??Clouddriver1\src\com\yun\filters\MyFilter1.java

?????文件????????313??2016-09-14?09:46??Clouddriver1\src\com\yun\form\AddFriendForm.java

?????文件????????421??2016-09-14?09:46??Clouddriver1\src\com\yun\form\FriendForm.java

?????文件????????598??2016-09-14?09:46??Clouddriver1\src\com\yun\form\RegisterUserForm.java

?????文件????????823??2016-09-14?09:46??Clouddriver1\src\com\yun\form\ShareForm.java

?????文件????????668??2016-09-14?09:46??Clouddriver1\src\com\yun\form\UserForm.java

?????文件????????447??2016-09-14?09:46??Clouddriver1\src\com\yun\form\UserInfoForm.java

............此處省略152個文件信息