优化目录结构

backend/src/main/java/com/openisle/config/ActivityInitializer.java

@@ -0,0 +1,26 @@
+package com.openisle.config;
+
+import com.openisle.model.Activity;
+import com.openisle.model.ActivityType;
+import com.openisle.repository.ActivityRepository;
+import lombok.RequiredArgsConstructor;
+import org.springframework.boot.CommandLineRunner;
+import org.springframework.stereotype.Component;
+
+@Component
+@RequiredArgsConstructor
+public class ActivityInitializer implements CommandLineRunner {
+    private final ActivityRepository activityRepository;
+
+    @Override
+    public void run(String... args) {
+        if (activityRepository.findByType(ActivityType.MILK_TEA) == null) {
+            Activity a = new Activity();
+            a.setTitle("🎡建站送奶茶活动");
+            a.setType(ActivityType.MILK_TEA);
+            a.setIcon("https://icons.veryicon.com/png/o/food--drinks/delicious-food-1/coffee-36.png");
+            a.setContent("为了有利于建站推广以及激励发布内容，我们推出了建站送奶茶的活动，前50名达到level 1的用户，可以联系站长获取奶茶/咖啡一杯");
+            activityRepository.save(a);
+        }
+    }
+}