feat(notice): 新增系统公告接口及后台实现

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

@@ -0,0 +1,25 @@
+package com.yupi.springbootinit.service.impl;
+
+import org.springframework.stereotype.Service;
+import java.util.List;
+import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
+import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
+import com.yupi.springbootinit.model.entity.SystemNotice;
+import com.yupi.springbootinit.mapper.SystemNoticeMapper;
+import com.yupi.springbootinit.service.SystemNoticeService;
+/*
+* @author: ziin
+* @date: 2026/2/10 20:25
+*/
+
+@Service
+public class SystemNoticeServiceImpl extends ServiceImpl<SystemNoticeMapper, SystemNotice> implements SystemNoticeService{
+
+    @Override
+    public List<SystemNotice> getActiveNoticeList() {
+        LambdaQueryWrapper<SystemNotice> queryWrapper = new LambdaQueryWrapper<>();
+        queryWrapper.eq(SystemNotice::getStatus, 0);
+        return this.list(queryWrapper);
+    }
+
+}