补充

mis-start/src/main/java/bc/mm/mis/dao/CountryDao.java

@@ -0,0 +1,13 @@
+package bc.mm.mis.dao;
+
+import bc.mm.mis.bean.Country;
+import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.stereotype.Repository;
+
+import java.util.List;
+
+@Repository
+public interface CountryDao extends JpaRepository<Country,Integer> {
+    // find all
+    List<Country> findAll();
+}

mis-start/src/main/java/bc/mm/mis/service/CountryService.java

@@ -0,0 +1,11 @@
+package bc.mm.mis.service;
+
+import bc.mm.mis.bean.Country;
+import org.springframework.stereotype.Component;
+
+import java.util.List;
+
+@Component
+public interface CountryService {
+    List<Country> findAll();
+}

mis-start/src/main/java/bc/mm/mis/service/impl/CountryServiceImpl.java

@@ -0,0 +1,20 @@
+package bc.mm.mis.service.impl;
+
+import bc.mm.mis.bean.Country;
+import bc.mm.mis.dao.CountryDao;
+import bc.mm.mis.service.CountryService;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Component;
+
+import java.util.List;
+
+@Component
+public class CountryServiceImpl implements CountryService {
+    @Autowired
+    CountryDao countryDao;
+
+    @Override
+    public List<Country> findAll() {
+        return countryDao.findAll();
+    }
+}