mybatis的模糊查询格式

mybatis的模糊查询格式；

  <select id="xxx"  parameterType="com.model.xxx"   resultMap="BaseResultMap">
        select * from users WHERE 1=1
        <if test="name != null and name != ''" >
           and name like CONCAT('%',#{name,jdbcType=VARCHAR},'%')
        </if>

        <if test="identity != null and identity != ''" >
           and identity like CONCAT('%',#{identity,jdbcType=VARCHAR},'%')
        </if>

        <if test="phon != null and phon != ''" >
           and phon like CONCAT('%',#{phon,jdbcType=VARCHAR},'%')
        </if>
  </select>