public static XmlElement generateKeysSelective(List<IntrospectedColumn> columns, String prefix, boolean bracket) {
        return generateCommColumnsSelective(columns, prefix, bracket, 1);
    }
public static XmlElement generateKeysSelective(List<IntrospectedColumn> columns, String prefix, boolean bracket) {
        return generateCommColumnsSelective(columns, prefix, bracket, 1);
    }
public static XmlElement generateKeysSelective ( List < IntrospectedColumn > columns , String prefix , boolean bracket ) { return generateCommColumnsSelective ( columns , prefix , bracket , 1 ) ; }
生成keys Selective Ele
@param columns
@param prefix
@param bracket
@return
生成keys Selective Ele