Redis:存储对象的两种方式(序列化和json字符串)

方式一：序列化操作

1.  
   public class SerializeUtil {
2.  
   /*
3.  
   * 序列化
4.  
   * */
5.  
   public static byte[] serizlize(Object object){
6.  
   ObjectOutputStream oos = null;
7.  
   ByteArrayOutputStream baos = null;
8.  
   try {
9.  
   baos = new ByteArrayOutputStream();
10.  
    oos = new ObjectOutputStream(baos);
11.  
    oos.writeObject(object);
12.  
    byte[] bytes = baos.toByteArray();
13.  
    return bytes;
14.  
    } catch (Exception e) {
15.  
    e.printStackTrace();
16.  
    }finally {
17.  
    try {
18.  
    if(baos != null){
19.  
    baos.close();
20.  
    }
21.  
    if (oos != null) {
22.  
    oos.close();
23.  
    }
24.  
    } catch (Exception e2) {
25.  
    e2.printStackTrace();
26.  
    }
27.  
    }
28.  
    return null;
29.  
    }
30.  
    /*
31.  
    * 反序列化
32.  
    * */
33.  
    public static Object deserialize(byte[] bytes){
34.  
    ByteArrayInputStream bais = null;
35.  
    ObjectInputStream ois = null;
36.  
    try{
37.  
    bais = new ByteArrayInputStream(bytes);
38.  
    ois = new ObjectInputStream(bais);
39.  
    return ois.readObject();
40.  
    }catch(Exception e){
41.  
    e.printStackTrace();
42.  
    }finally {
43.  
    try {
44.  
     
45.  
    } catch (Exception e2) {
46.  
    e2.printStackTrace();
47.  
    }
48.  
    }
49.  
    return null;
50.  
    }
51.  
    }

获取jedis实例

1.  
   public class RedisConnection {
2.  
   private static String HOST = "127.0.0.1";
3.  
   private static int PORT = 6379;
4.  
   private static int MAX_ACTIVE = 1024;
5.  
   private static int MAX_IDLE = 200;
6.  
   private static int MAX_WAIT = 10000;
7.  
    
8.  
   private static JedisPool jedisPool = null;
9.  
    
10.  
    /*
11.  
    * 初始化redis连接池
12.  
    * */
13.  
    private static void initPool(){
14.  
    try {
15.  
    JedisPoolConfig config = new JedisPoolConfig();
16.  
    config.setMaxTotal(MAX_ACTIVE);//最大连接数
17.  
    config.setMaxIdle(MAX_IDLE);//最大空闲连接数
18.  
    config.setMaxWaitMillis(MAX_WAIT);//获取可用连接的最大等待时间
19.  
     
20.  
    jedisPool = new JedisPool(config, HOST, PORT);
21.  
    } catch (Exception e) {
22.  
    e.printStackTrace();
23.  
    }
24.  
    }
25.  
     
26.  
    /*
27.  
    * 获取jedis实例
28.  
    * */
29.  
    public synchronized static Jedis getJedis() {
30.  
    try {
31.  
    if(jedisPool == null){
32.  
    initPool();
33.  
    }
34.  
    Jedis jedis = jedisPool.getResource();
35.  
    jedis.auth("redis");//密码
36.  
    return jedis;
37.  
    } catch (Exception e) {
38.  
    e.printStackTrace();
39.  
    return null;
40.  
    }
41.  
    }
42.  
    }

redis操作

1.  
   public class RedisOps {
2.  
   public static void set(String key,String value){
3.  
   Jedis jedis = RedisConnection.getJedis();
4.  
   jedis.set(key, value);
5.  
   jedis.close();
6.  
   }
7.  
   public static String get(String key){
8.  
   Jedis jedis = RedisConnection.getJedis();
9.  
   String value = jedis.get(key);
10.  
    jedis.close();
11.  
    return value;
12.  
    }
13.  
    public static void setObject(String key,Object object){
14.  
    Jedis jedis = RedisConnection.getJedis();
15.  
    jedis.set(key.getBytes(), SerializeUtil.serizlize(object));
16.  
    jedis.close();
17.  
    }
18.  
    public static Object getObject(String key){
19.  
    Jedis jedis = RedisConnection.getJedis();
20.  
    byte[] bytes = jedis.get(key.getBytes());
21.  
    jedis.close();
22.  
    return SerializeUtil.deserialize(bytes);
23.  
    }
24.  
    }

实体类

1.  
   public class User implements Serializable{
2.  
   private static final long serialVersionUID = -3210884885630038713L;
3.  
   private int id;
4.  
   private String name;
5.  
   public User(){
6.  
    
7.  
   }
8.  
   public User(int id,String name){
9.  
   this.id = id;
10.  
    this.name = name;
11.  
    }
12.  
    //setter和getter方法
13.  
    }

测试用例

1.  
   public class RedisTest {
2.  
    
3.  
   @Test
4.  
   public void testString(){
5.  
   RedisOps.set("user:1", "sisu");
6.  
   String user = RedisOps.get("user:1");
7.  
   Assert.assertEquals("sisu", user);
8.  
   }
9.  
    
10.  
    @Test
11.  
    public void testObject(){
12.  
    RedisOps.setObject("user:2",new User(2,"lumia"));
13.  
    User user = (User)RedisOps.getObject("user:2");
14.  
    Assert.assertEquals("lumia", user.getName());
15.  
    }
16.  
     
17.  
    }

方式二：使用fastjson将对象转为json字符串后存储

1.  
   public class RedisOps {
2.  
   public static void setJsonString(String key,Object object){
3.  
   Jedis jedis = RedisConnection.getJedis();
4.  
   jedis.set(key, JSON.toJSONString(object));
5.  
   jedis.close();
6.  
   }
7.  
   public static Object getJsonObject(String key,Class clazz){
8.  
   Jedis jedis = RedisConnection.getJedis();
9.  
   String value = jedis.get(key);
10.  
    jedis.close();
11.  
    return JSON.parseObject(value,clazz);
12.  
    }
13.  
    }

测试:

1.  
   @Test
2.  
   public void testObject2(){
3.  
   RedisOps.setJsonString("user:3", new User(3,"xiaoming"));
4.  
   User user = (User)RedisOps.getJsonObject("user:3",User.class);
5.  
   Assert.assertEquals("xiaoming", user.getName());
6.