添加分页插件支持

my-project-backend/src/main/java/com/example/config/MybatisConfiguration.java

@@ -0,0 +1,18 @@
+package com.example.config;
+
+import com.baomidou.mybatisplus.annotation.DbType;
+import com.baomidou.mybatisplus.extension.plugins.MybatisPlusInterceptor;
+import com.baomidou.mybatisplus.extension.plugins.inner.PaginationInnerInterceptor;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+@Configuration
+public class MybatisConfiguration {
+    @Bean
+    public MybatisPlusInterceptor mybatisPlusInterceptor(){
+        MybatisPlusInterceptor interceptor = new MybatisPlusInterceptor();
+        //添加分页插件
+        interceptor.addInnerInterceptor(new PaginationInnerInterceptor(DbType.MYSQL));
+        return interceptor;
+    }
+}

my-project-backend/src/main/java/com/example/service/impl/TopicServiceImpl.java

@@ -65,9 +65,9 @@ public class TopicServiceImpl extends ServiceImpl<TopicMapper, Topic> implements
         //无缓存从数据库读取
         Page<Topic> page = Page.of(pageNumber, 10);
         if(type == 0)
-            this.baseMapper.selectPage(page, null);
+            this.baseMapper.selectPage(page, Wrappers.<Topic>query().orderByDesc("time"));
         else
-            this.baseMapper.selectPage(page, Wrappers.<Topic>query().eq("type", type));
+            this.baseMapper.selectPage(page, Wrappers.<Topic>query().eq("type", type).orderByDesc("time"));
         List<Topic> topics = page.getRecords();
         if(topics.isEmpty()) return null;
         list = topics.stream().map(this::resolveToPreview).toList();

my-project-backend/src/main/java/com/example/utils/CacheUtils.java

@@ -18,13 +18,13 @@ public class CacheUtils {
     public <T> T takeFromCache(String key, Class<T> dataType) {
         String s = template.opsForValue().get(key);
         if(s == null) return null;
-        return JSONObject.from(s).to(dataType);
+        return JSONObject.parseObject(s).to(dataType);
     }
 
     public <T> List<T> takeListFromCache(String key, Class<T> itemType) {
         String s = template.opsForValue().get(key);
         if(s == null) return null;
-        return JSONArray.from(s).toList(itemType);
+        return JSONArray.parseArray(s).toList(itemType);
     }
 
     public <T> void saveToCache(String key, T data, long expire) {

my-project-frontend/src/views/forum/TopicList.vue

@@ -20,7 +20,7 @@ const today = computed(() => {
     const date = new Date()
     return `${date.getFullYear()} 年 ${date.getMonth() + 1} 月 ${date.getDate()} 日`
 })
-get('/api/forum/list-topic?page=1&type=0', data => list.value = data)
+get('/api/forum/list-topic?page=0&type=0', data => list.value = data)
 
 navigator.geolocation.getCurrentPosition(position => {
     const latitude = position.coords.latitude