java 中通用唯一识别码的生成

import java.util.UUID;


public class GeneralKey {

public static String getGeneralKey(){
UUID uuid = UUID.randomUUID();
return uuid.toString().replaceAll("-", "");
}

public static void main(String[] args) {

for(int i=0; i<20; i++){
System.out.println(GeneralKey.getGeneralKey());
System.out.println(GeneralKey.getGeneralKey().length());
System.out.println(">>>>>>>>>>>>>>>>>>>>>>>>>>");
}
}
}