创建 AddrService.java

src/main/java/com/gao/finalhw/service/AddrService.java

@@ -0,0 +1,17 @@
+package com.gao.finalhw.service;
+
+import com.gao.finalhw.mapper.AddressMapper;
+import com.gao.finalhw.model.Address;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+
+@Service
+public class AddrService {
+    @Autowired
+    AddressMapper addressMapper;
+
+    public Address getAddrById(int id) {
+        Address result = addressMapper.selectById(id);
+        return result;
+    }
+}