1.新建抽象类,jdk1.8同样可以创建接口.
public abstract class SerializeTranscoder { protected static Logger logger = Logger.getLogger(SerializeTranscoder.class); public abstract byte[] serialize(Object value);//序列化对象为字节集合 public abstract Object deserialize(byte[] in);//转换成对象 public void close(Closeable closeable) { if (closeable != null) { try { closeable.close(); } catch (Exception e) { logger.info("Unable to close " + closeable, e); } } } }
2.创建list的实现类
public class ListTranscoder<M extends Serializable> extends SerializeTranscoder { @SuppressWarnings("unchecked") public List<M> deserialize(byte[] in) { List<M> list = new ArrayList<>(); ByteArrayInputStream bis = null; ObjectInputStream is = null; try { if (in != null) { bis = new ByteArrayInputStream(in); is = new ObjectInputStream(bis); while (true) { M m = (M)is.readObject(); if (m == null) { break; } list.add(m); } is.close(); bis.close(); } } catch (IOException e) { LoggerUtils.error(logger, String.format("Caught IOException decoding %d bytes of data", in == null ? 0 : in.length) + e); } catch (ClassNotFoundException e) { LoggerUtils.error(logger, String.format("Caught CNFE decoding %d bytes of data", in == null ? 0 : in.length) + e); } finally { close(is); close(bis); } return list; } @SuppressWarnings("unchecked") @Override public byte[] serialize(Object value) { if (value == null) throw new NullPointerException("Can't serialize null"); List<M> values = (List<M>) value; byte[] results = null; ByteArrayOutputStream bos = null; ObjectOutputStream os = null; try { bos = new ByteArrayOutputStream(); os = new ObjectOutputStream(bos); for (M m : values) { os.writeObject(m); } // os.writeObject(null); os.close(); bos.close(); results = bos.toByteArray(); } catch (IOException e) { throw new IllegalArgumentException("Non-serializable object", e); } finally { close(os); close(bos); } return results; } }
3.创建Object对象的类
public class ObjectsTranscoder<M extends Serializable> extends SerializeTranscoder { @SuppressWarnings("unchecked") @Override public byte[] serialize(Object value) { if (value == null) { throw new NullPointerException("Can't serialize null"); } byte[] result = null; ByteArrayOutputStream bos = null; ObjectOutputStream os = null; try { bos = new ByteArrayOutputStream(); os = new ObjectOutputStream(bos); M m = (M) value; os.writeObject(m); os.close(); bos.close(); result = bos.toByteArray(); } catch (IOException e) { throw new IllegalArgumentException("Non-serializable object", e); } finally { close(os); close(bos); } return result; } @SuppressWarnings("unchecked") @Override public M deserialize(byte[] in) { M result = null; ByteArrayInputStream bis = null; ObjectInputStream is = null; try { if (in != null) { bis = new ByteArrayInputStream(in); is = new ObjectInputStream(bis); result = (M) is.readObject(); is.close(); bis.close(); } } catch (IOException e) { LoggerUtils.error(logger, String.format("Caught IOException decoding %d bytes of data", in == null ? 0 : in.length) + e); } catch (ClassNotFoundException e) { LoggerUtils.error(logger, String.format("Caught CNFE decoding %d bytes of data", in == null ? 0 : in.length) + e); } finally { close(is); close(bis); } return result; } }
jedis就可以直接操作list和Object对象.
public void setObjectList(String key,List<M> value,int cacheSeconds){
Jedis jedis=getResource();
if(jedis.exists(key)){
jedis.del(key);
}
ListTranscoder coder=new ListTranscoder();
jedis.set(key.getBytes(),coder.serialize(value));
if(cacheSeconds){//缓存时间
jedis.expire(key,cacheSeconds);
}
}
