diff --git a/.idea/workspace.xml b/.idea/workspace.xml
index 24a2f97..6e0dc61 100644
--- a/.idea/workspace.xml
+++ b/.idea/workspace.xml
@@ -2,14 +2,11 @@
 <project version="4">
   <component name="ChangeListManager">
     <list default="true" id="48484101-7a18-4278-bdb7-e43b4204d542" name="Default Changelist" comment="">
-      <change afterPath="$PROJECT_DIR$/bccore/pom.xml" afterDir="false" />
-      <change afterPath="$PROJECT_DIR$/bccore/src/main/java/bc/mm/core/bean/Country.java" afterDir="false" />
-      <change afterPath="$PROJECT_DIR$/bccore/src/main/java/bc/mm/core/bean/Users.java" afterDir="false" />
-      <change afterPath="$PROJECT_DIR$/bccore/src/main/java/bc/mm/core/dao/CrudDao.java" afterDir="false" />
-      <change afterPath="$PROJECT_DIR$/bccore/src/main/resources/application.properties" afterDir="false" />
-      <change beforePath="$PROJECT_DIR$/.idea/compiler.xml" beforeDir="false" afterPath="$PROJECT_DIR$/.idea/compiler.xml" afterDir="false" />
+      <change afterPath="$PROJECT_DIR$/bccore/src/main/java/bc/mm/core/dao/CountryDao.java" afterDir="false" />
+      <change afterPath="$PROJECT_DIR$/bccore/src/main/java/bc/mm/core/service/ICountryService.java" afterDir="false" />
+      <change afterPath="$PROJECT_DIR$/bccore/src/main/java/bc/mm/core/service/impl/CountryServiceImpl.java" afterDir="false" />
       <change beforePath="$PROJECT_DIR$/.idea/workspace.xml" beforeDir="false" afterPath="$PROJECT_DIR$/.idea/workspace.xml" afterDir="false" />
-      <change beforePath="$PROJECT_DIR$/pom.xml" beforeDir="false" afterPath="$PROJECT_DIR$/pom.xml" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/bccore/src/main/java/bc/mm/core/dao/CrudDao.java" beforeDir="false" afterPath="$PROJECT_DIR$/bccore/src/main/java/bc/mm/core/dao/CrudDao.java" afterDir="false" />
     </list>
     <ignored path="$PROJECT_DIR$/out/" />
     <ignored path="$PROJECT_DIR$/target/" />
@@ -32,57 +29,38 @@
   <component name="FileEditorManager">
     <leaf>
       <file pinned="false" current-in-tab="false">
-        <entry file="file://$PROJECT_DIR$/bccore/pom.xml">
+        <entry file="file://$PROJECT_DIR$/bccore/src/main/java/bc/mm/core/dao/CountryDao.java">
           <provider selected="true" editor-type-id="text-editor">
-            <state relative-caret-position="345">
-              <caret line="15" selection-start-line="15" selection-end-line="15" />
+            <state relative-caret-position="220">
+              <caret line="10" column="15" selection-start-line="10" selection-start-column="15" selection-end-line="10" selection-end-column="15" />
+              <folding>
+                <element signature="imports" expanded="true" />
+              </folding>
             </state>
           </provider>
         </entry>
       </file>
       <file pinned="false" current-in-tab="false">
-        <entry file="file://$PROJECT_DIR$/bccore/src/main/java/bc/mm/core/bean/Country.java">
+        <entry file="file://$PROJECT_DIR$/bccore/src/main/java/bc/mm/core/service/ICountryService.java">
           <provider selected="true" editor-type-id="text-editor">
-            <state relative-caret-position="23">
-              <caret line="1" selection-start-line="1" selection-end-line="1" />
+            <state relative-caret-position="198">
+              <caret line="9" column="10" selection-start-line="9" selection-start-column="10" selection-end-line="9" selection-end-column="10" />
               <folding>
                 <element signature="imports" expanded="true" />
-                <element signature="e#382#383#0" expanded="true" />
-                <element signature="e#407#408#0" expanded="true" />
-                <element signature="e#444#445#0" expanded="true" />
-                <element signature="e#472#473#0" expanded="true" />
-                <element signature="e#360#361#0" expanded="true" />
-                <element signature="e#387#388#0" expanded="true" />
-                <element signature="e#427#428#0" expanded="true" />
-                <element signature="e#459#460#0" expanded="true" />
-                <element signature="e#490#491#0" expanded="true" />
-                <element signature="e#517#518#0" expanded="true" />
-                <element signature="e#557#558#0" expanded="true" />
-                <element signature="e#589#590#0" expanded="true" />
-                <element signature="e#628#629#0" expanded="true" />
-                <element signature="e#663#664#0" expanded="true" />
-                <element signature="e#719#720#0" expanded="true" />
-                <element signature="e#767#768#0" expanded="true" />
-                <element signature="e#800#801#0" expanded="true" />
-                <element signature="e#828#829#0" expanded="true" />
-                <element signature="e#871#872#0" expanded="true" />
-                <element signature="e#905#906#0" expanded="true" />
-                <element signature="e#939#940#0" expanded="true" />
-                <element signature="e#969#970#0" expanded="true" />
-                <element signature="e#1015#1016#0" expanded="true" />
-                <element signature="e#1053#1054#0" expanded="true" />
               </folding>
             </state>
           </provider>
         </entry>
       </file>
       <file pinned="false" current-in-tab="true">
-        <entry file="file://$PROJECT_DIR$/bccore/src/main/java/bc/mm/core/dao/CrudDao.java">
+        <entry file="file://$PROJECT_DIR$/bccore/src/main/java/bc/mm/core/service/impl/CountryServiceImpl.java">
           <provider selected="true" editor-type-id="text-editor">
-            <state relative-caret-position="418">
-              <caret line="19" column="26" selection-start-line="19" selection-start-column="26" selection-end-line="19" selection-end-column="26" />
+            <state relative-caret-position="374">
+              <caret line="17" column="35" selection-start-line="17" selection-start-column="35" selection-end-line="17" selection-end-column="35" />
               <folding>
                 <element signature="imports" expanded="true" />
+                <element signature="e#244#245#0" expanded="true" />
+                <element signature="e#271#272#0" expanded="true" />
               </folding>
             </state>
           </provider>
@@ -94,8 +72,8 @@
     <option name="RECENT_TEMPLATES">
       <list>
         <option value="package-info" />
-        <option value="Class" />
         <option value="Interface" />
+        <option value="Class" />
       </list>
     </option>
   </component>
@@ -131,6 +109,9 @@
         <option value="$PROJECT_DIR$/bccore/src/main/resources/application.properties" />
         <option value="$PROJECT_DIR$/bccore/src/main/java/bc/mm/core/bean/Country.java" />
         <option value="$PROJECT_DIR$/bccore/src/main/java/bc/mm/core/dao/CrudDao.java" />
+        <option value="$PROJECT_DIR$/bccore/src/main/java/bc/mm/core/dao/CountryDao.java" />
+        <option value="$PROJECT_DIR$/bccore/src/main/java/bc/mm/core/service/ICountryService.java" />
+        <option value="$PROJECT_DIR$/bccore/src/main/java/bc/mm/core/service/impl/CountryServiceImpl.java" />
       </list>
     </option>
   </component>
@@ -166,6 +147,64 @@
               <item name="bcjava" type="462c0819:PsiDirectoryNode" />
               <item name="bccore" type="462c0819:PsiDirectoryNode" />
             </path>
+            <path>
+              <item name="BCoins Plat Manger Information System" type="b2602c69:ProjectViewProjectNode" />
+              <item name="bcjava" type="462c0819:PsiDirectoryNode" />
+              <item name="bccore" type="462c0819:PsiDirectoryNode" />
+              <item name="src" type="462c0819:PsiDirectoryNode" />
+            </path>
+            <path>
+              <item name="BCoins Plat Manger Information System" type="b2602c69:ProjectViewProjectNode" />
+              <item name="bcjava" type="462c0819:PsiDirectoryNode" />
+              <item name="bccore" type="462c0819:PsiDirectoryNode" />
+              <item name="src" type="462c0819:PsiDirectoryNode" />
+              <item name="main" type="462c0819:PsiDirectoryNode" />
+            </path>
+            <path>
+              <item name="BCoins Plat Manger Information System" type="b2602c69:ProjectViewProjectNode" />
+              <item name="bcjava" type="462c0819:PsiDirectoryNode" />
+              <item name="bccore" type="462c0819:PsiDirectoryNode" />
+              <item name="src" type="462c0819:PsiDirectoryNode" />
+              <item name="main" type="462c0819:PsiDirectoryNode" />
+              <item name="java" type="462c0819:PsiDirectoryNode" />
+            </path>
+            <path>
+              <item name="BCoins Plat Manger Information System" type="b2602c69:ProjectViewProjectNode" />
+              <item name="bcjava" type="462c0819:PsiDirectoryNode" />
+              <item name="bccore" type="462c0819:PsiDirectoryNode" />
+              <item name="src" type="462c0819:PsiDirectoryNode" />
+              <item name="main" type="462c0819:PsiDirectoryNode" />
+              <item name="java" type="462c0819:PsiDirectoryNode" />
+              <item name="core" type="462c0819:PsiDirectoryNode" />
+            </path>
+            <path>
+              <item name="BCoins Plat Manger Information System" type="b2602c69:ProjectViewProjectNode" />
+              <item name="bcjava" type="462c0819:PsiDirectoryNode" />
+              <item name="bccore" type="462c0819:PsiDirectoryNode" />
+              <item name="src" type="462c0819:PsiDirectoryNode" />
+              <item name="main" type="462c0819:PsiDirectoryNode" />
+              <item name="java" type="462c0819:PsiDirectoryNode" />
+              <item name="core" type="462c0819:PsiDirectoryNode" />
+              <item name="dao" type="462c0819:PsiDirectoryNode" />
+            </path>
+            <path>
+              <item name="BCoins Plat Manger Information System" type="b2602c69:ProjectViewProjectNode" />
+              <item name="bcjava" type="462c0819:PsiDirectoryNode" />
+              <item name="bccore" type="462c0819:PsiDirectoryNode" />
+              <item name="src" type="462c0819:PsiDirectoryNode" />
+              <item name="main" type="462c0819:PsiDirectoryNode" />
+              <item name="java" type="462c0819:PsiDirectoryNode" />
+              <item name="core" type="462c0819:PsiDirectoryNode" />
+              <item name="service" type="462c0819:PsiDirectoryNode" />
+            </path>
+            <path>
+              <item name="BCoins Plat Manger Information System" type="b2602c69:ProjectViewProjectNode" />
+              <item name="bcjava" type="462c0819:PsiDirectoryNode" />
+              <item name="bccore" type="462c0819:PsiDirectoryNode" />
+              <item name="src" type="462c0819:PsiDirectoryNode" />
+              <item name="main" type="462c0819:PsiDirectoryNode" />
+              <item name="resources" type="462c0819:PsiDirectoryNode" />
+            </path>
           </expand>
           <select />
         </subPane>
@@ -256,7 +295,7 @@
       <option name="number" value="Default" />
       <option name="presentableId" value="Default" />
       <updated>1709705326078</updated>
-      <workItem from="1709705327787" duration="15766000" />
+      <workItem from="1709705327787" duration="16261000" />
     </task>
     <task id="LOCAL-00001" summary="补充springboot 结构">
       <created>1709706040716</created>
@@ -321,11 +360,18 @@
       <option name="project" value="LOCAL" />
       <updated>1709774983582</updated>
     </task>
-    <option name="localTasksCounter" value="10" />
+    <task id="LOCAL-00010" summary="创建bc核心jar">
+      <created>1709867348286</created>
+      <option name="number" value="00010" />
+      <option name="presentableId" value="LOCAL-00010" />
+      <option name="project" value="LOCAL" />
+      <updated>1709867348286</updated>
+    </task>
+    <option name="localTasksCounter" value="11" />
     <servers />
   </component>
   <component name="TimeTrackingManager">
-    <option name="totallyTimeSpent" value="15766000" />
+    <option name="totallyTimeSpent" value="16261000" />
   </component>
   <component name="ToolWindowManager">
     <frame x="1912" y="-7" width="1936" height="1056" extended-state="6" />
@@ -379,7 +425,8 @@
     <MESSAGE value="完善组件" />
     <MESSAGE value="定时任务非web 方式启动" />
     <MESSAGE value="配置定时任务" />
-    <option name="LAST_COMMIT_MESSAGE" value="配置定时任务" />
+    <MESSAGE value="创建bc核心jar" />
+    <option name="LAST_COMMIT_MESSAGE" value="创建bc核心jar" />
   </component>
   <component name="editorHistoryManager">
     <entry file="file://$PROJECT_DIR$/bcws/pom.xml">
@@ -703,13 +750,6 @@
         </state>
       </provider>
     </entry>
-    <entry file="file://$PROJECT_DIR$/bccore/pom.xml">
-      <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="345">
-          <caret line="15" selection-start-line="15" selection-end-line="15" />
-        </state>
-      </provider>
-    </entry>
     <entry file="file://$PROJECT_DIR$/bccore/src/main/resources/application.properties">
       <provider selected="true" editor-type-id="text-editor">
         <state relative-caret-position="88">
@@ -719,7 +759,7 @@
     </entry>
     <entry file="file://$PROJECT_DIR$/bccore/src/main/java/bc/mm/core/bean/Country.java">
       <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="23">
+        <state relative-caret-position="22">
           <caret line="1" selection-start-line="1" selection-end-line="1" />
           <folding>
             <element signature="imports" expanded="true" />
@@ -751,12 +791,51 @@
         </state>
       </provider>
     </entry>
+    <entry file="file://$PROJECT_DIR$/bccore/pom.xml">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="352">
+          <caret line="16" column="10" lean-forward="true" selection-start-line="16" selection-start-column="10" selection-end-line="16" selection-end-column="10" />
+        </state>
+      </provider>
+    </entry>
     <entry file="file://$PROJECT_DIR$/bccore/src/main/java/bc/mm/core/dao/CrudDao.java">
       <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="418">
-          <caret line="19" column="26" selection-start-line="19" selection-start-column="26" selection-end-line="19" selection-end-column="26" />
+        <state relative-caret-position="352">
+          <caret line="16" column="6" lean-forward="true" selection-start-line="16" selection-start-column="6" selection-end-line="16" selection-end-column="6" />
+          <folding>
+            <element signature="imports" expanded="true" />
+          </folding>
+        </state>
+      </provider>
+    </entry>
+    <entry file="file://$PROJECT_DIR$/bccore/src/main/java/bc/mm/core/dao/CountryDao.java">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="220">
+          <caret line="10" column="15" selection-start-line="10" selection-start-column="15" selection-end-line="10" selection-end-column="15" />
+          <folding>
+            <element signature="imports" expanded="true" />
+          </folding>
+        </state>
+      </provider>
+    </entry>
+    <entry file="file://$PROJECT_DIR$/bccore/src/main/java/bc/mm/core/service/ICountryService.java">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="198">
+          <caret line="9" column="10" selection-start-line="9" selection-start-column="10" selection-end-line="9" selection-end-column="10" />
+          <folding>
+            <element signature="imports" expanded="true" />
+          </folding>
+        </state>
+      </provider>
+    </entry>
+    <entry file="file://$PROJECT_DIR$/bccore/src/main/java/bc/mm/core/service/impl/CountryServiceImpl.java">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="374">
+          <caret line="17" column="35" selection-start-line="17" selection-start-column="35" selection-end-line="17" selection-end-column="35" />
           <folding>
             <element signature="imports" expanded="true" />
+            <element signature="e#244#245#0" expanded="true" />
+            <element signature="e#271#272#0" expanded="true" />
           </folding>
         </state>
       </provider>
diff --git a/bccore/src/main/java/bc/mm/core/dao/CountryDao.java b/bccore/src/main/java/bc/mm/core/dao/CountryDao.java
new file mode 100644
index 0000000..a224158
--- /dev/null
+++ b/bccore/src/main/java/bc/mm/core/dao/CountryDao.java
@@ -0,0 +1,13 @@
+package bc.mm.core.dao;
+
+import bc.mm.core.bean.Country;
+import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.stereotype.Repository;
+
+import java.util.List;
+
+@Repository
+public interface CountryDao extends JpaRepository {
+    // find all
+    List<Country> findAll();
+}
diff --git a/bccore/src/main/java/bc/mm/core/dao/CrudDao.java b/bccore/src/main/java/bc/mm/core/dao/CrudDao.java
index 4f30a69..d1c9009 100644
--- a/bccore/src/main/java/bc/mm/core/dao/CrudDao.java
+++ b/bccore/src/main/java/bc/mm/core/dao/CrudDao.java
@@ -5,7 +5,7 @@ import org.aspectj.apache.bcel.util.Repository;
 import java.io.Serializable;
 import java.util.Optional;
 
-public interface CrudDao<T,ID extends Serializable> extends Repository<T,ID> {
+public interface CrudDao<T,ID extends Serializable> extends Repository {
     // save
     <S extends T> S save(S entity);
     // find id
diff --git a/bccore/src/main/java/bc/mm/core/service/ICountryService.java b/bccore/src/main/java/bc/mm/core/service/ICountryService.java
new file mode 100644
index 0000000..3e4799c
--- /dev/null
+++ b/bccore/src/main/java/bc/mm/core/service/ICountryService.java
@@ -0,0 +1,11 @@
+package bc.mm.core.service;
+
+import bc.mm.core.bean.Country;
+import org.springframework.stereotype.Component;
+
+import java.util.List;
+
+@Component
+public interface ICountryService {
+    List<Country> findAll();
+}
diff --git a/bccore/src/main/java/bc/mm/core/service/impl/CountryServiceImpl.java b/bccore/src/main/java/bc/mm/core/service/impl/CountryServiceImpl.java
new file mode 100644
index 0000000..7315f42
--- /dev/null
+++ b/bccore/src/main/java/bc/mm/core/service/impl/CountryServiceImpl.java
@@ -0,0 +1,20 @@
+package bc.mm.core.service.impl;
+
+import bc.mm.core.bean.Country;
+import bc.mm.core.dao.CountryDao;
+import bc.mm.core.service.ICountryService;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+
+import java.util.List;
+
+@Service
+public class CountryServiceImpl implements ICountryService {
+    @Autowired
+    CountryDao countryDao;
+
+    @Override
+    public List<Country> findAll() {
+        return countryDao.findAll();
+    }
+}