java使用Redis2--保存对象

Redis中并没有提供set(String key, Object obj)的方法，但提供了set(final byte[] key, final byte[] value) 的方法，可以通过把对象转化成字节数组的方式进行储存。

对象类

package redis;

import java.io.Serializable;

public class Goods implements Serializable {
    /**
     * 
     */
    private static final long serialVersionUID = 3870927632803751641L;
    private String name;
    private int num;
    private int price;

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public int getNum() {
        return num;
    }

    public void setNum(int num) {
        this.num = num;
    }

    public int getPrice() {
        return price;
    }

    public void setPrice(int price) {
        this.price = price;
    }
}

序列化工具类

package redis;
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;
    }
}

redis保存对象扩展类

package redis;
import redis.clients.jedis.Jedis;

/**
 * 
 * @author ajun
 * 
 */
public class RedisClient {
    private static final String ip = "192.168.77.135";
    private static final int port = 6379;
    protected static RedisClient redis = new RedisClient();
    protected static Jedis jedis = new Jedis(ip, port);;
    static {

    }

    protected RedisClient() {
        System.out.println(" init Redis ");
    }

    public static RedisClient 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;
    }

}

测试类

package redis;

import redis.clients.jedis.Jedis;

public class SaveObjectTest {
    /**
     * Administrator
     * 
     * @param args
     */
    public static void main(String[] args) {
        // 操作单独的文本串
        Jedis redis = new Jedis("192.168.77.135", 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(19);
        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 = RedisClient.getInstance().set(g, key);
        System.out.println(temp);
        Object o = RedisClient.getInstance().get(key);
        if (o != null) {
            Goods g1 = (Goods) o;
            System.out.println(g1.getName());
            System.out.println(g1.getNum());
        }
        System.out.println(RedisClient.getInstance().del(key));
    }
}