diff --git a/springboot-mybatis-crud/src/main/resources/com/inmind/mapper/EmpMapper.xml b/springboot-mybatis-crud/src/main/resources/com/inmind/mapper/EmpMapper.xml
index 2b9a458..2f86439 100644
--- a/springboot-mybatis-crud/src/main/resources/com/inmind/mapper/EmpMapper.xml
+++ b/springboot-mybatis-crud/src/main/resources/com/inmind/mapper/EmpMapper.xml
@@ -4,9 +4,14 @@
         "https://mybatis.org/dtd/mybatis-3-mapper.dtd">
 <mapper namespace="com.inmind.mapper.EmpMapper">
 
+    <!--抽取公共的查询sql-->
+    <sql id="empCommonSelect">
+        select id, username, password, name, gender, image, job, entrydate, dept_id, create_time, update_time from emp
+    </sql>
 
     <select id="list1" resultType="com.inmind.pojo.Emp"><!--注意：resultType定义的是单条记录的java封装类型-->
-        select * from emp
+        <!--插入指定的sql片段-->
+        <include refid="empCommonSelect"></include>
         <where>
             <if test="name != null">
                 name like  concat('%',#{name},'%')