public static StringType getStringType(String str) {
		TreeSet<CharType> set = getTypeSet(str);
		if(set.size()==1){
			CharType c = set.first();
			return char2StringType(c);
		}
		return StringType.M;		
	}
public static StringType getStringType ( String str ) { TreeSet < CharType > set = getTypeSet ( str ) ; if ( set . size ( ) == 1 ) { CharType c = set . first ( ) ; return char2StringType ( c ) ; } return StringType . M ; }
得到字符串类型
@param str
@return
@see Chars#char2StringType(CharType)