Redis 存储字符串和对象<转>

转自：http://blog.csdn.net/abc19900828/article/details/40373549

今天用redis存储，发现客户端jedis提供的存储方法中存储的类型只有String和byte数据，没有能够存储对象的，网上发现可以序列化存储对象。这就开始了我第一次序列化之旅。

1 测试类

import redis.clients.RedisClinet;
import redis.clients.SerializeUtil;
import redis.clients.jedis.Jedis;
public class Test
{

/**
* Administrator
* @param args
*/
public static void main(String[]
args) {

// 操作单独的文本串
Jedis redis= new Jedis( "10.2.31.38",
6379);

redis.set( "key", "value");
System. out.println(redis.get( "key"));
System. out.println(redis.del( "key"));

// 操作实体类对象
Goods good= new Goods();
// 这个Goods实体我就不写了啊
good.setName( "洗衣机" );
good.setNum(400);
good.setPrice(19l);
redis.set( "good".getBytes(), SerializeUtil. serialize(good));
byte[]
value = redis.get( "good".getBytes());
Object object = SerializeUtil. unserialize(value);
if(object!= null){
Goods goods=(Goods) object;
System. out.println(goods.getName());
System. out.println(goods.getNum());
System. out.println(goods.getPrice());
}
System. out.println(redis.del( "good".getBytes()));

// 操作实体类对象2（实际上和上面是一样的）
String key= "goods-key";
Goods g= new Goods();
g.setName( "电风扇--d" );
g.setNum(200);
String temp=RedisClinet. getInstance().set(g, key);
System. out.println(temp);

Object o=RedisClinet. getInstance().get(key);
if(o!= null)
{
Goods g1=(Goods)o;
System. out.println(g1.getName());
System. out.println(g1.getNum());
}
System. out.println(RedisClinet. getInstance().del(key));

}
}
2 RedisClinet 客户端类
package redis.clients;
import redis.clients.jedis.Jedis;
/**
*
* @author ajun
*
*/
public class RedisClinet {
private static final String ip= "10.2.31.38";
private static final int port=6379;
protected static RedisClinet redis = new RedisClinet ();
protected static Jedis jedis = new Jedis( ip, port);;
static {

}
protected RedisClinet(){
System. out.println( "
init Redis ");
}
public static RedisClinet getInstance()
{
return redis;
}

/**set Object*/
public String
set(Object object,String key)
{
return jedis.set(key.getBytes(),
SerializeUtil.serialize(object));
}

/**get Object*/
public Object
get(String key)
{
byte[]
value = jedis.get(key.getBytes());
return SerializeUtil. unserialize(value);
}

/**delete a key**/
public boolean del(String
key)
{
return jedis.del(key.getBytes())>0;
}
}
3 序列化工具类
/**
*
*/
package redis.clients;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
/**
* @author Administrator
*
*/
public class SerializeUtil
{
public static byte[]
serialize(Object object) {
ObjectOutputStream oos = null;
ByteArrayOutputStream baos = null;
try {
// 序列化
baos = new ByteArrayOutputStream();
oos = new ObjectOutputStream(baos);
oos.writeObject(object);
byte[]
bytes = baos.toByteArray();
return bytes;
} catch (Exception
e) {

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

}
return null;
}
}