java mybatis 动态sql

//-------------------------------查询-------------------------------------//

<sql id="cmsGuestbookColumns">

         a.id AS "id",
        a.GROUP_NUMBER AS "groupNumber",
        a.GROUP_NAME AS "groupName",
        a.GROUP_AMOUNT  as "groupAmount",
        a.GROUP_STATUS AS "groupStatus",
           a.RULES AS "rules",
        a.DELETE_STATUS AS "deleteStatus",
        <!-- a.MODIFIEDBY AS "modifiedby", -->
        a.MODIFIEDBY AS "updateBy",
        <!-- DATE_FORMAT(a.MODIFIEDON,'%Y-%m-%d %H:%i:%s')     AS "modifiedon", -->
         DATE_FORMAT(a.MODIFIEDON,'%Y-%m-%d %H:%i:%s')     AS "updateDate",
        a.CREATEDBY AS "createdby",
            <!-- DATE_FORMAT(a.CREATEDON,'%Y-%m-%d %H:%i:%s') AS "createdon"   -->
         DATE_FORMAT(a.CREATEDON,'%Y-%m-%d %H:%i:%s') AS "createDate"
    </sql>

    <select id="findList" resultType="com.thinkgem.jeesite.modules.rule.entity.RuleCombinationModel">
        SELECT
            <include refid="cmsGuestbookColumns"/>
        FROM t_zg_rule_group  a

        <where>
            a.DELETE_STATUS = 0
            <if test="groupNumber!='' and groupNumber!=null ">
            and a.GROUP_NUMBER=#{groupNumber}
            </if>
            <if test="groupName!='' and groupName!=null ">
            and a.GROUP_NAME=#{groupName}
            </if>
            <if test="groupStatus!='' and groupStatus!=null ">
            and a.GROUP_STATUS=#{groupStatus}
            </if>
        </where>
        <choose>
            <when test="page !=null and page.orderBy != null and page.orderBy != ''">
                ORDER BY ${page.orderBy}
            </when>
            <otherwise>
                ORDER BY a.CREATEDON DESC
            </otherwise>
        </choose>
    </select>

//-------------------------------修改-------------------------------------//

    <update id="update">
        UPDATE t_zg_rule_group
         <set>
        <if test="groupNumber !='' and groupNumber !=null">
        GROUP_NUMBER=#{groupNumber},
        </if>
        <if test="groupName !='' and groupName !=null">
        GROUP_NAME=#{groupName},
        </if>
            <if test="groupStatus !='' and groupStatus !=null">
        GROUP_STATUS=#{groupStatus},
        </if>
            <if test="groupAmount !='' and groupAmount !=null">
        GROUP_AMOUNT=#{groupAmount},
        </if>
        <if test="deleteStatus !='' and deleteStatus !=null">
        DELETE_STATUS=#{deleteStatus},
        </if>
            <if test="modifiedby !='' and modifiedby !=null">
        MODIFIEDBY=#{modifiedby},
        </if>
        </set>
        WHERE id = #{id}
    </update>