MyBatis mapper文件中使用常量

Java 開發中會經常寫一些靜態常量和靜態方法，但是我們在寫sql語句的時候會經常用到判斷是否等於

//靜態類
public class CommonCode {
    public static String EENTERPRISE_PRODUCE = "waste_produce_enterprise"
    public static String EENTERPRISE_DISPOSAL = "waste_disposal_enterp"
   //內部類
        public static class Enterprise {
        public static String EENTERPRISE_PRODUCE = "waste_produce_enterprise";     
        public static String EENTERPRISE_DISPOSAL = "waste_disposal_enterprise";
    }
   }

我們在mapper文件中做判斷

  //內部類  注意**$** 符號 
     <if test="(type ==@com.xx.xxxx.xxxxxxxxxxxx.CommonCode$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 ==@com.xx.xxxx.xxxxxxxxxxxx.CommonCode@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>