Java开发技巧揭秘：实现数据分片与合并功能

class DataShardingTask implements Runnable {
    private List<Data> dataList;

    public DataShardingTask(List<Data> dataList) {
        this.dataList = dataList;
    }

    @Override
    public void run() {
        // 对数据进行处理
        for (Data data : dataList) {
            // 处理数据的逻辑
        }
    }
}

public class DataSharding {
    public static void main(String[] args) {
        List<Data> dataList = new ArrayList<>();
        // 初始化数据集合

        int threadCount = 4; // 线程数量
        int dataSize = dataList.size(); // 数据集合大小

        int shardSize = dataSize / threadCount; // 每个线程处理的数据量

        ExecutorService executorService = Executors.newFixedThreadPool(threadCount);

        for (int i = 0; i < threadCount; i++) {
            int start = i * shardSize;
            int end = (i == threadCount - 1) ? dataSize : (i + 1) * shardSize;

            List<Data> shard = dataList.subList(start, end);
            executorService.execute(new DataShardingTask(shard));
        }

        executorService.shutdown();
    }
}

class DataMergeTask implements Callable<Data> {
    private List<Data> shard;

    public DataMergeTask(List<Data> shard) {
        this.shard = shard;
    }

    @Override
    public Data call() {
        // 合并数据的逻辑
        Data mergedData = new Data();

        for (Data data : shard) {
            // 合并数据的逻辑
            // mergedData = ...
        }

        return mergedData;
    }
}

public class DataMerge {
    public static void main(String[] args) throws InterruptedException, ExecutionException {
        List<Data> dataList = new ArrayList<>();
        // 初始化分片处理的结果数据集合

        int shardCount = dataList.size(); // 分片数量

        ExecutorService executorService = Executors.newFixedThreadPool(shardCount);
        List<Future<Data>> futures = new ArrayList<>();

        for (int i = 0; i < shardCount; i++) {
            List<Data> shard = dataList.get(i);
            futures.add(executorService.submit(new DataMergeTask(shard)));
        }

        executorService.shutdown();

        List<Data> mergedDataList = new ArrayList<>();
        for (Future<Data> future : futures) {
            Data mergedData = future.get();
            mergedDataList.add(mergedData);
        }

        // 处理合并后的数据集合
    }
}