JUC高併發編程(二)之多線程下載支付寶對賬文件

1.背景

在實際開發中,經常會遇到支付需求,當然就會有支付對賬的需求....

2.項目結構

3.代碼

3.1.線程池配置對象

@Configuration
@EnableAsync
public class ExecutorConfig {
    /**
     * @return
     */
    @Bean
    public Executor asyncServiceExecutor() {
        ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();
        //配置核心線程數
        executor.setCorePoolSize(30);
        //配置最大線程數
        executor.setMaxPoolSize(40);
        //配置隊列大小
        executor.setQueueCapacity(99999);
        //配置線程池中的線程的名稱前綴
        executor.setThreadNamePrefix("async-service-");
        // rejection-policy:當pool已經達到max size的時候,如何處理新任務
        // CALLER_RUNS:不在新線程中執行任務,而是有調用者所在的線程來執行
        executor.setRejectedExecutionHandler(new ThreadPoolExecutor.CallerRunsPolicy());
        //執行初始化
        executor.initialize();
        return executor;
    }
}

 

3.2.controller層代碼

@RestController
public class BillController {
    @Autowired
    private IBillService billService;
    /**
     * 下載對賬單
     *
     * @return
     */
    @RequestMapping("/api/downBill")
    public Object downBill() {
        Object result = billService.billDown();
        return "ok::" + result;
    }
}

 

3.3.業務層代碼-下載

/**
 * @author 姿勢帝-博客園
 * @address https://www.cnblogs.com/newAndHui/
 * @WeChat 851298348
 * @create 10/30 11:27
 * @description <p>
 * 以下載支付寶對賬單爲案例進行演示
 * 接口文檔:https://opendocs.alipay.com/open/02ivbw
 * 關於支付支付課程可以查看:https://www.cnblogs.com/newAndHui/p/14258491.html
 * </p>
 */
@Service
@Slf4j
public class BillServiceImpl implements IBillService {
    @Autowired
    private IOrderService orderService;

    @Override
    public Object billDown() {
        // 以下載支付寶對賬單爲案例進行演示
        // 這裏模擬一個對賬文件
        ExcelReader reader = ExcelUtil.getReader(FileUtil.file("F:\\test\\t1.xlsx"));
        // 分頁取值,每頁10條
        boolean flag = true;
        int pageIndex = 1;
        int pageSize = 10;
        int sum = 0;
        while (flag) {
            int startIndex = pageSize * (pageIndex - 1) + 1;
            int endIndex = startIndex + pageSize - 1;
            List<Map<String, Object>> list = reader.read(0, startIndex, endIndex);
            int size = list.size();
            if (size > 0) {
                sum += size;
                // 異步保存數據
                orderService.saveBillOrder(list);
            }
            if (list.size() < pageSize) {
                flag = false;
            } else {
                pageIndex++;
            }
        }
        return "共:" + sum + "交易記錄";
    }
}

 

3.4.業務層代碼-保存

@Service
@Slf4j
public class IOrderServiceImpl implements IOrderService {
    @Override
    @Async("asyncServiceExecutor")
    public void saveBillOrder(List<Map<String, Object>> list) {
        int size = list.size();
        log.info("保存數據:" + size);
        int i = 1;
        for (Map<String, Object> bIllOrder : list) {
            log.info("保存第:" + i + "/" + size + ",bIllOrder=" + bIllOrder);
            // 模擬保存耗時(0到5秒)
            ThreadUtil.sleepRandom();
            i++;
            log.info("數據保存完成");
        }
    }
}

 

3.5.對賬文件模板

4.測試

    @Test
    void downBill() {
        String url = "http://localhost:8001/api/downBill";
        HttpRequest request = HttpUtil.createGet(url);
        String response = request.execute().body();
        System.out.println(response);
    }

 

測試結果:

5.完美!

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