public static List<Element> generateKeys(List<IntrospectedColumn> columns, boolean bracket) {
        return generateCommColumns(columns, null, bracket, 1);
    }
public static List<Element> generateKeys(List<IntrospectedColumn> columns, boolean bracket) {
        return generateCommColumns(columns, null, bracket, 1);
    }
public static List < Element > generateKeys ( List < IntrospectedColumn > columns , boolean bracket ) { return generateCommColumns ( columns , null , bracket , 1 ) ; }
生成keys Ele
@param columns
@param bracket
@return
生成keys Ele