src/main/java/com/itfsw/mybatis/generator/plugins/utils/XmlElementGeneratorTools.java
public static void generateWhereByPrimaryKeyTo(XmlElement element, List<IntrospectedColumn> primaryKeyColumns) {
        generateWhereByPrimaryKeyTo(element, primaryKeyColumns, null);
    }
public static void generateWhereByPrimaryKeyTo(XmlElement element, List<IntrospectedColumn> primaryKeyColumns) {
        generateWhereByPrimaryKeyTo(element, primaryKeyColumns, null);
    }
生成 xxxByPrimaryKey 的where 语句
@param element
@param primaryKeyColumns
@return