import java.util.UUID;

public class Utils {
    /*
        设置UUid
    */
    public static String uuid(){
        String uuid= UUID.randomUUID().toString();
        char[] cs=new char[32];
        int j=0;
        for(int i=uuid.length();i-->0;){
            if(uuid.charAt(i)!='-'){
                cs[j++]=uuid.charAt(i);
            }
        }
        return new String(cs);
    }
}