public static String UU(String uu16) {
        StringBuilder sb = new StringBuilder();
        sb.append(uu16.substring(0, 8));
        sb.append('-');
        sb.append(uu16.substring(8, 12));
        sb.append('-');
        sb.append(uu16.substring(12, 16));
        sb.append('-');
        sb.append(uu16.substring(16, 20));
        sb.append('-');
        sb.append(uu16.substring(20));
        return sb.toString();
    }
public static String UU ( String uu16 ) { StringBuilder sb = new StringBuilder ( ) ; sb . append ( uu16 . substring ( 0 , 8 ) ) ; sb . append ( '-' ) ; sb . append ( uu16 . substring ( 8 , 12 ) ) ; sb . append ( '-' ) ; sb . append ( uu16 . substring ( 12 , 16 ) ) ; sb . append ( '-' ) ; sb . append ( uu16 . substring ( 16 , 20 ) ) ; sb . append ( '-' ) ; sb . append ( uu16 . substring ( 20 ) ) ; return sb . toString ( ) ; }
将紧凑格式的 UU16 字符串变成标准 UUID 格式的字符串

@param uu16
@return 标准 UUID 字符串