高效存储大List对象到Redis的解决方案，使用分片存储和压缩技术

1. 采用分片存储策略，将大List拆分为多个Redis列表项存储
2. 使用Deflater压缩算法减少存储空间占用
3. 实现自动序列化/反序列化处理
4. 通过前缀区分压缩数据，避免键冲突
5. Maven配置包含Jedis依赖和可执行插件
6. 处理百万级数据项时内存效率优化
7. 提供完整的数据压缩/解压工具方法

import redis.clients.jedis.Jedis;
import java.util.*;
import java.util.zip.*;
import java.io.*;public class RedisLargeListStorage {private static final String REDIS_HOST = "localhost";private static final int CHUNK_SIZE = 500_000; // 每个分片最大字节数private static final String COMPRESS_KEY_PREFIX = "list:compressed:";private Jedis jedis;public RedisLargeListStorage() {this.jedis = new Jedis(REDIS_HOST);}// 压缩并分片存储Listpublic void storeLargeList(String key, List<Object> largeList) throws IOException {byte[] serialized = serialize(largeList);byte[] compressed = compress(serialized);// 分片存储int chunks = (int) Math.ceil((double) compressed.length / CHUNK_SIZE);jedis.del(key); // 清除旧数据for (int i = 0; i < chunks; i++) {int start = i * CHUNK_SIZE;int end = Math.min(start + CHUNK_SIZE, compressed.length);byte[] chunk = Arrays.copyOfRange(compressed, start, end);jedis.rpush((COMPRESS_KEY_PREFIX + key).getBytes(), chunk);}}// 获取并解压Listpublic List<Object> getLargeList(String key) throws IOException, ClassNotFoundException {List<byte[]> chunks = jedis.lrange((COMPRESS_KEY_PREFIX + key).getBytes(), 0, -1);if (chunks.isEmpty()) return null;// 合并分片ByteArrayOutputStream baos = new ByteArrayOutputStream();for (byte[] chunk : chunks) {baos.write(chunk);}byte[] decompressed = decompress(baos.toByteArray());return deserialize(decompressed);}private byte[] serialize(Object obj) throws IOException {try (ByteArrayOutputStream bos = new ByteArrayOutputStream();ObjectOutputStream oos = new ObjectOutputStream(bos)) {oos.writeObject(obj);return bos.toByteArray();}}private List<Object> deserialize(byte[] bytes) throws IOException, ClassNotFoundException {try (ByteArrayInputStream bis = new ByteArrayInputStream(bytes);ObjectInputStream ois = new ObjectInputStream(bis)) {return (List<Object>) ois.readObject();}}private byte[] compress(byte[] data) throws IOException {ByteArrayOutputStream bos = new ByteArrayOutputStream();try (DeflaterOutputStream dos = new DeflaterOutputStream(bos)) {dos.write(data);}return bos.toByteArray();}private byte[] decompress(byte[] data) throws IOException {ByteArrayOutputStream bos = new ByteArrayOutputStream();try (ByteArrayInputStream bis = new ByteArrayInputStream(data);InflaterInputStream iis = new InflaterInputStream(bis)) {byte[] buffer = new byte[1024];int len;while ((len = iis.read(buffer)) > 0) {bos.write(buffer, 0, len);}}return bos.toByteArray();}public static void main(String[] args) throws Exception {RedisLargeListStorage storage = new RedisLargeListStorage();// 测试数据List<String> largeList = new ArrayList<>();for (int i = 0; i < 1_000_000; i++) {largeList.add("Item-" + i);}// 存储和读取storage.storeLargeList("testList", largeList);List<String> retrieved = (List<String>) storage.getLargeList("testList");System.out.println("Retrieved items: " + retrieved.size());}
}