Redis– Jedis存储Java对象 - (Java序列化为byte数组方式) Java 序列化和反序列化

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.util.HashMap;
import java.util.Map;
import java.util.Set;

/**
* Created by Lovell on 16/7/2.
*/
public class SerializeUtil {

/**
* serialize Object
* @param object
* @return byte[]
*/
public static byte[] serialize(final Object object) {
ObjectOutputStream oos = null;
ByteArrayOutputStream baos = null;
try {
baos = new ByteArrayOutputStream();
oos = new ObjectOutputStream(baos);
oos.writeObject(object);
return baos.toByteArray();
} catch (Exception e) {

}
return null;
}

/**
* unserialize byte[]
* @param bytes
* @return Object
*/
public static Object unserialize(final byte[] bytes) {
ByteArrayInputStream bais = null;
try {
bais = new ByteArrayInputStream(bytes);
ObjectInputStream ois = new ObjectInputStream(bais);
return ois.readObject();
} catch (Exception e) {

}
return null;
}

/**
* serialize hash Map<Object, Object>
* @param hash
* @return Map<byte[], byte[]>
*/
public static Map<byte[], byte[]> serializehmoo2mbb(Map<Object, Object> hash) {
Map<byte[], byte[]> result = new HashMap<byte[], byte[]>();
try {
Set<Object> keys = hash.keySet();
if (keys != null && keys.size() > 0) {
for (Object key : keys) {
result.put(serialize(key), serialize(hash.get(key)));
}
}
} catch (Exception e) {
}
return result;
}

/**
* unserialize hash Map<byte[], byte[]>
* @param hash
* @return Map<Object, Object>
*/
public static Map<Object, Object> unserializehmbb2moo(final Map<byte[], byte[]> hash) {
Map<Object, Object> result = new HashMap<Object, Object>();
try {
Set<byte[]> keys = hash.keySet();
if (keys != null && keys.size() > 0) {
for (byte[] key : keys) {
result.put(unserialize(key), unserialize(hash.get(key)));
}
}
} catch (Exception e) {
}
return result;
}

/**
* serialize hash Map<String, Object>
* @param hash
* @return Map<byte[], byte[]>
*/
public static Map<byte[], byte[]> serializehmso2mbb(final Map<String, Object> hash) {
Map<byte[], byte[]> result = new HashMap<byte[], byte[]>();
try {
Set<String> keys = hash.keySet();
if (keys != null && keys.size() > 0) {
for (String key : keys) {
result.put(serialize(key), serialize(hash.get(key)));
}
}
} catch (Exception e) {
}
return result;
}

/**
* unserialize hash Map<byte[], byte[]>
* @param hash
* @return Map<String, Object>
*/
public static Map<String, Object> unserializehmbb2mso(final Map<byte[], byte[]> hash) {
Map<String, Object> result = new HashMap<String, Object>();
try {
Set<byte[]> keys = hash.keySet();
if (keys != null && keys.size() > 0) {
for (byte[] key : keys) {
result.put(unserialize(key).toString(), unserialize(hash.get(key)));
}
}
} catch (Exception e) {
}
return result;
}
}

写对象

将Person对象写入Redis中：

publicvoid setObject() {
Person person = newPerson(100, "alan");
jedis.set("person:100".getBytes(),SerializeUtil.serialize(person));
person = new Person(101,"bruce");
jedis.set("person:101".getBytes(),SerializeUtil.serialize(person));
}
 

运行上面代码之后，我们到命令行窗口中读取该对象，看看有没有写入成功：

redis127.0.0.1:6379> get person:100
"\xac\xed\x00\x05sr\x00\x15alanland.redis.Person\x05\xf4\x8d9A\xf4`\xb0\x02\x00\x02I\x00\x02idL\x00\x04namet\x00\x12Ljava/lang/String;xp\x00\x00\x00dt\x00\x04alan"
 

可以取到序列化之后的值。

 

取对象

用Jedis获取对象：

publicPerson getObject(int id) {
byte[] person =jedis.get(("person:" + id).getBytes());
return (Person)SerializeUtil.unserialize(person);
}
 

测试一下上一步存入的两个对象：

Personperson = test.getObject(100);
System.out.println(person.getId());
System.out.println(person.getName());
person= test.getObject(101);
System.out.println(person.getId());
System.out.println(person.getName());
 

Java控制台输入：

100
alan
101
bruce