diff --git a/.idea/workspace.xml b/.idea/workspace.xml
index 130031a..c4538ca 100644
--- a/.idea/workspace.xml
+++ b/.idea/workspace.xml
@@ -10,12 +10,9 @@
   </component>
   <component name="ChangeListManager">
     <list default="true" id="841a97d6-fb7a-4203-9936-89f5a7cbed8f" name="变更" comment="shopping commit">
-      <change beforePath="$PROJECT_DIR$/.idea/inspectionProfiles/Project_Default.xml" beforeDir="false" afterPath="$PROJECT_DIR$/.idea/inspectionProfiles/Project_Default.xml" afterDir="false" />
+      <change afterPath="$PROJECT_DIR$/README.md" afterDir="false" />
       <change beforePath="$PROJECT_DIR$/.idea/workspace.xml" beforeDir="false" afterPath="$PROJECT_DIR$/.idea/workspace.xml" afterDir="false" />
-      <change beforePath="$PROJECT_DIR$/src/main/java/com/example/demo3/Servlet/login.java" beforeDir="false" />
-      <change beforePath="$PROJECT_DIR$/src/main/java/com/example/demo3/pojo/User.java" beforeDir="false" afterPath="$PROJECT_DIR$/src/main/java/com/example/demo3/pojo/User.java" afterDir="false" />
       <change beforePath="$PROJECT_DIR$/src/main/resources/UserMapper.xml" beforeDir="false" afterPath="$PROJECT_DIR$/src/main/resources/UserMapper.xml" afterDir="false" />
-      <change beforePath="$PROJECT_DIR$/src/main/webapp/login.jsp" beforeDir="false" afterPath="$PROJECT_DIR$/src/main/webapp/login.jsp" afterDir="false" />
     </list>
     <option name="SHOW_DIALOG" value="false" />
     <option name="HIGHLIGHT_CONFLICTS" value="true" />
@@ -210,7 +207,7 @@
       <workItem from="1652831640701" duration="8942000" />
       <workItem from="1652812498631" duration="5883000" />
       <workItem from="1652815871388" duration="3279000" />
-      <workItem from="1652812440545" duration="4987000" />
+      <workItem from="1652812440545" duration="5865000" />
     </task>
     <task id="LOCAL-00001" summary="shopping commit">
       <created>1652814834331</created>
@@ -233,7 +230,14 @@
       <option name="project" value="LOCAL" />
       <updated>1652815114705</updated>
     </task>
-    <option name="localTasksCounter" value="4" />
+    <task id="LOCAL-00004" summary="shopping commit">
+      <created>1652859761642</created>
+      <option name="number" value="00004" />
+      <option name="presentableId" value="LOCAL-00004" />
+      <option name="project" value="LOCAL" />
+      <updated>1652859761642</updated>
+    </task>
+    <option name="localTasksCounter" value="5" />
     <servers />
   </component>
   <component name="TypeScriptGeneratedFilesManager">
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..e2c77c8
--- /dev/null
+++ b/README.md
@@ -0,0 +1,26 @@
+# 数据库命令
+插入数据：
+···  
+insert into 表
+value (数据1),(数据2)……
+···
+
+删除数据：
+···  
+delete from 表
+where 条件……
+···
+
+更改数据：
+···  
+update 表
+set 更改指令
+where 条件……
+···
+
+查找数据：
+···  
+select * from 表
+where 条件……
+···
+
diff --git a/src/main/resources/UserMapper.xml b/src/main/resources/UserMapper.xml
index 1d48ccb..6a2731c 100644
--- a/src/main/resources/UserMapper.xml
+++ b/src/main/resources/UserMapper.xml
@@ -26,8 +26,11 @@
     </select>
     <select id="findAll" resultType="com.example.demo3.pojo.use">
         select *
-        from userlist
-        where unnamed = #{username}, unType = #{userType}
+        from userlist;
+    </select>
+    <select id="addOne" resultType="com.example.demo3.pojo.use">
+        insert into userlist (id, img, username, userpasswd, email, react_time, iphone, order_number, consumption,
+                              user_type) value (*);
     </select>
 
 </mapper>