MyBatis sql中test判断Boolean

MyBatis  sql中test判断Boolean

【三种方式】： 

<select id="queryAddress" resultType="com.caox.model.Address">
		select id, address, remark
		from address where
		1=1
		<if test="flag==true">
         and  address = #{address}
		</if>
	</select>

<update id="updateHaveNewComment">
        <choose>
            <when test="flag==true">
                UPDATE epc_subject_center s
                SET s.have_new_comment=1
                WHERE s.id=#{id}
            </when>
            <otherwise>
                UPDATE epc_subject_center s
                SET s.have_new_comment=0
                WHERE s.id=#{id}
            </otherwise>
        </choose>
    </update>

<update id="updateHaveNewComment">
        <choose>
            <when test="flag">
                UPDATE epc_subject_center s
                SET s.have_new_comment=1
                WHERE s.id=#{id}
            </when>
            <otherwise>
                UPDATE epc_subject_center s
                SET s.have_new_comment=0
                WHERE s.id=#{id}
            </otherwise>
        </choose>
    </update>