Mybatis的choose分情况筛选

<if test="matchResult != null and '' != matchResult ">
    <choose>
                    <when test="'true'.toString() == matchResult">
                        and match_num &gt; 0
                            </when>
                    <when test="'false'.toString() == matchResult">
                        and match_num &lt; 1
                            </when>
                </choose>
            </if>