实现对局录像页面

backendcloud/backend/src/main/java/com/kob/backend/config/MybatisConfig.java

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+// 用于实现对局记录的分页功能
+package com.kob.backend.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 MybatisConfig {
+    @Bean
+    public MybatisPlusInterceptor mybatisPlusInterceptor() {
+        MybatisPlusInterceptor interceptor = new MybatisPlusInterceptor();
+        interceptor.addInnerInterceptor(new PaginationInnerInterceptor(DbType.MYSQL));
+        return interceptor;
+    }
+}

backendcloud/backend/src/main/java/com/kob/backend/controller/record/GetRecordListController.java

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+package com.kob.backend.controller.record;
+
+import com.alibaba.fastjson2.JSONObject;
+import com.kob.backend.service.record.GetRecordListService;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RequestParam;
+import org.springframework.web.bind.annotation.RestController;
+
+import java.util.Map;
+
+@RestController
+public class GetRecordListController {
+    @Autowired
+    private GetRecordListService getRecordListService;
+
+    // 这里只需要获取,因此只需要用 get 方法(需要新建和修改数据时,使用 post 方法)
+    @GetMapping("/record/getlist/")
+    public JSONObject getList(@RequestParam Map<String, String> data) {
+        // 解析出 page 信息
+        Integer page = Integer.parseInt(data.get("page_index"));
+        return getRecordListService.getList(page);
+    }
+}

backendcloud/backend/src/main/java/com/kob/backend/service/impl/record/GetRecordListServiceImpl.java

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+// 实现对局信息分页发送
+package com.kob.backend.service.impl.record;
+
+import com.alibaba.fastjson2.JSONObject;
+import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
+import com.baomidou.mybatisplus.core.metadata.IPage;
+import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
+import com.kob.backend.mapper.RecordMapper;
+import com.kob.backend.mapper.UserMapper;
+import com.kob.backend.pojo.Record;
+import com.kob.backend.pojo.User;
+import com.kob.backend.service.record.GetRecordListService;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+
+import java.util.LinkedList;
+import java.util.List;
+
+@Service
+public class GetRecordListServiceImpl implements GetRecordListService {
+    @Autowired
+    private RecordMapper recordMapper;
+
+    @Autowired
+    private UserMapper userMapper;  // 注入 UserMapper 用于查询用户名和用户头像
+
+    @Override
+    public JSONObject getList(Integer page) {
+        // 使用 Mybatis API : IPage 实现
+        IPage<Record> recordIPage = new Page<>(page, 10);    // 参数列表:Page<>(传第几页, 每一页有多少项目)
+        QueryWrapper<Record> queryWrapper = new QueryWrapper<>();
+        queryWrapper.orderByDesc("id"); // 通过 record 的 id 降序排序
+        List<Record> records = recordMapper.selectPage(recordIPage, queryWrapper).getRecords();
+
+
+        JSONObject resp = new JSONObject();
+        List<JSONObject> items = new LinkedList<>();
+        for (Record record : records) { // 枚举对局记录
+            // 获取用户 A 和 B
+            User userA = userMapper.selectById(record.getAId());
+            User userB = userMapper.selectById(record.getBId());
+
+            // 取出 A 和 B 的用户名和头像信息
+            String aName = userA.getUsername(), bName = userB.getUsername();
+            String aPhoto = userA.getPhoto(), bPhoto = userB.getPhoto();
+
+            String winner = "平局!";  // 定义赢家
+
+            // 将 A 和 B 的用户名和头像信息存到 jsonObject 对象 item 中
+            JSONObject item = new JSONObject();
+            item.put("a_username", aName);
+            item.put("a_photo", aPhoto);
+            item.put("b_username", bName);
+            item.put("b_photo", bPhoto);
+            if ("A".equals(record.getLoser())) winner = userB.getUsername() + " 胜";
+            else if ("B".equals(record.getLoser())) winner = userA.getUsername() + " 胜";
+            item.put("winner", winner); // 存入赢家信息
+            item.put("record", record); // 存入对战信息
+            // 将 jsonObject 对象 item 中,添加到 items 列表中
+            items.add(item);
+        }
+
+        resp.put("records", items); // 将 items 信息存入 records 中
+        resp.put("records_count", recordMapper.selectCount(null));  // 存入当前记录页面的总数
+
+        return resp;
+    }
+}

backendcloud/backend/src/main/java/com/kob/backend/service/record/GetRecordListService.java

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+package com.kob.backend.service.record;
+
+import com.alibaba.fastjson2.JSONObject;
+
+public interface GetRecordListService {
+    // 参数:分页面列表编号
+    JSONObject getList(Integer page);
+}