diff --git a/README.md b/README.md
index 928111d..b5c59fe 100644
--- a/README.md
+++ b/README.md
@@ -12,3 +12,6 @@ the is new school working. and then is about Money System.
 
 涉及课外的编写思路，要项目要求、习惯
 
+定义用户持续类（POJO）
+
+查找
\ No newline at end of file
diff --git a/src/main/resources/DepModelClassMapper.xml b/src/main/resources/DepModelClassMapper.xml
index 48dc1da..9bc0087 100644
--- a/src/main/resources/DepModelClassMapper.xml
+++ b/src/main/resources/DepModelClassMapper.xml
@@ -4,5 +4,8 @@
         "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
 <mapper namespace="com.jd.springboot.depositModel.Dao.DbDao">
     <insert id="addData"/>
-    <select id="findData" resultType="com.jd.springboot.depositModel.ModelClass.POJO.UserModel"/>
+    <select id="findData" resultType="com.jd.springboot.depositModel.ModelClass.POJO.UserModel">
+        select *
+        from studentinfo;
+    </select>
 </mapper>
\ No newline at end of file