创建 UserInfoService.java

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

@@ -0,0 +1,23 @@
+package com.gao.finalhw.service;
+
+import com.gao.finalhw.controller.UserController;
+import com.gao.finalhw.mapper.UserInfoMapper;
+import com.gao.finalhw.model.UserInfo;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+
+@Service
+public class UserInfoService {
+    private final Logger logger = LoggerFactory.getLogger(UserInfoService.class);
+    @Autowired
+    UserInfoMapper userInfoMapper;
+
+    public UserInfo getUserInfo(int id){
+        UserInfo result = userInfoMapper.selectById(id);
+        logger.info("select user info result: {}",result);
+        return  result;
+
+    }
+}