java使用Redis2--儲存對象

標籤：

Redis中並沒有提供set(String key, Object obj)的方法，但提供了set(final byte[] key, final byte[] value) 的方法，可以通過把對象轉化成位元組數組的方式進行儲存。

對象類

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;    }}

序列化工具類

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 {            // 還原序列化            bais = new ByteArrayInputStream(bytes);            ObjectInputStream ois = new ObjectInputStream(bais);            return ois.readObject();        } catch (Exception e) {        }        return null;    }}

redis儲存對象擴充類

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;    }}

測試類別

package redis;import redis.clients.jedis.Jedis;public class SaveObjectTest {    /**     * Administrator     *      * @param args     */    public static void main(String[] args) {        // 操作單獨的文本串        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"));        // 操作實體類對象        Goods good = new Goods(); // 這個Goods實體我就不寫了啊        good.setName("洗衣機");        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()));        // 操作實體類對象2（實際上和上面是一樣的）        String key = "goods-key";        Goods g = new Goods();        g.setName("電風扇--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));    }}

 

java使用Redis2--儲存對象