主播信息入库添加 userId 字段，添加国家信息接口

src/main/java/com/yupi/springbootinit/service/CountryInfoService.java

@@ -0,0 +1,17 @@
+package com.yupi.springbootinit.service;
+
+    /*
+* @author: ziin
+* @date: 2025/6/13 13:57
+*/
+
+import com.baomidou.mybatisplus.extension.service.IService;
+import com.yupi.springbootinit.model.entity.CountryInfo;
+import com.yupi.springbootinit.model.vo.country.CountryInfoVO;
+
+import java.util.List;
+
+public interface CountryInfoService extends IService<CountryInfo> {
+
+    List<CountryInfoVO> getCountryList();
+}

src/main/java/com/yupi/springbootinit/service/impl/CountryInfoServiceImpl.java

@@ -0,0 +1,30 @@
+package com.yupi.springbootinit.service.impl;
+
+import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
+import com.yupi.springbootinit.model.entity.CountryInfo;
+import com.yupi.springbootinit.model.vo.country.CountryInfoVO;
+import org.springframework.stereotype.Service;
+
+import org.springframework.beans.factory.annotation.Autowired;
+
+import com.yupi.springbootinit.mapper.CountryInfoMapper;
+import com.yupi.springbootinit.service.CountryInfoService;
+
+import javax.annotation.Resource;
+import java.util.List;
+/*
+* @author: ziin
+* @date: 2025/6/13 13:57
+*/
+    
+@Service
+public class CountryInfoServiceImpl extends ServiceImpl<CountryInfoMapper, CountryInfo> implements CountryInfoService{
+
+    @Resource
+    private CountryInfoMapper countryInfoMapper;
+
+    @Override
+    public List<CountryInfoVO> getCountryList() {
+        return countryInfoMapper.selectByCountryGroupName();
+    }
+}