MyBatis mapper文件中使用常量

Java 开发中会经常写一些静态常量和静态方法，但是我们在写sql语句的时候会经常用到判断是否等于

//静态类

public class CommonCode {

    public static String EENTERPRISE_PRODUCE = "waste_produce_enterprise"

    public static String EENTERPRISE_DISPOSAL = "waste_disposal_enterp"

   //内部类

        public static class Enterprise {

        public static String EENTERPRISE_PRODUCE = "waste_produce_enterprise";

        public static String EENTERPRISE_DISPOSAL = "waste_disposal_enterprise";

    }

   }

我们在mapper文件中做判断

  //内部类  注意**$** 符号

     <if test="(type [email protected]$Enterprise@EENTERPRISE_DISPOSAL) ">

                <if test="wasteCategory !=null and wasteCategory !=''">

                    and wd.waste_category in(

                    <foreach collection="wasteCategory.split(',')" item="item" index="index" separator=",">

                        #{item}

                    </foreach>

                    )

                </if>

            </if>

            //常量

            <if test="(type [email protected]@EENTERPRISE_PRODUCE) ">

                <if test="wasteCode !=null and wasteCode !=''">

                    and wp.waste_code in(

                    <foreach collection="wasteCode.split(',')" item="item" index="index" separator=",">

                        #{item}

                    </foreach>

                    )

                </if>

            </if>