动态参数拼接的查询语句

–传入参数类型为自定义数据类型

<select id="queryMessageList" parameterType="com.imooc.bean.Message" resultMap="MessageResult"> select ID,COMMAND,DESCRIPTION,CONTENT from MESSAGE where 1=1 <if test="command !=null &amp;&amp;!&quot;&quot;.equals(command.trim())"> and COMMAND=#{command} </if> <if test="description != null and !&quot;&quot;.equals(description.trim())"> and DESCRIPTION like '%' #{description} '%' </if> </select>

删除单条数据

–传入参数类型为String与基本数据类型

<delete id="deleteOne" parameterType="int"> delete from MESSAGE WHERE ID = #{_parameter}</delete>

删除多条数据

–传入参数类型为List

<delete id="deleteBatch" parameterType="java.util.List"> delete from MESSAGE WHERE ID in ( <foreach collection="list" item="item" separator=","> #{item} </foreach> ) </delete>

以上所述是小编给大家介绍的Mybatis配置文件之动态SQL配置备忘录，希望对大家有所帮助，如果大家有任何疑问欢迎给我留言，小编会及时回复大家的！