除了String類型，實戰中我們還經常會在Redis中存儲對象，這時候我們就會想是否可以使用類似RedisTemplate<String, User>來初始化並進行操作。但是Spring Boot並不支持直接使用，需要我們自己實現RedisSerializer<T>接口來對傳入對象進行序列化和反序列化，下面我們通過一個實例來完成對象的讀寫操作。

• 創建要存儲的對象：User

  public class User implements Serializable {
  
      private static final long serialVersionUID = -1L;
  
      private String username;
      private Integer age;
  
      public User(String username, Integer age) {
          this.username = username;
          this.age = age;
      }
  
      // 省略getter和setter
  
  }
  

  　　

• 實現對象的序列化接口

  public class RedisObjectSerializer implements RedisSerializer<Object> {
  
    private Converter<Object, byte[]> serializer = new SerializingConverter();
    private Converter<byte[], Object> deserializer = new DeserializingConverter();
  
    static final byte[] EMPTY_ARRAY = new byte[0];
  
    public Object deserialize(byte[] bytes) {
      if (isEmpty(bytes)) {
        return null;
      }
  
      try {
        return deserializer.convert(bytes);
      } catch (Exception ex) {
        throw new SerializationException("Cannot deserialize", ex);
      }
    }
  
    public byte[] serialize(Object object) {
      if (object == null) {
        return EMPTY_ARRAY;
      }
  
      try {
        return serializer.convert(object);
      } catch (Exception ex) {
        return EMPTY_ARRAY;
      }
    }
  
    private boolean isEmpty(byte[] data) {
      return (data == null || data.length == 0);
    }
  }
   
  

  　　

• 配置針對User的RedisTemplate實例

  @Configuration
  public class RedisConfig {
  
      @Bean
      JedisConnectionFactory jedisConnectionFactory() {
          return new JedisConnectionFactory();
      }
  
      @Bean
      public RedisTemplate<String, User> redisTemplate(RedisConnectionFactory factory) {
          RedisTemplate<String, User> template = new RedisTemplate<String, User>();
          template.setConnectionFactory(jedisConnectionFactory());
          template.setKeySerializer(new StringRedisSerializer());
          template.setValueSerializer(new RedisObjectSerializer());
          return template;
      }
  
  
  }
   
  

  　　

• 完成了配置工作後，編寫測試用例實驗效果

  @RunWith(SpringJUnit4ClassRunner.class)
  @SpringApplicationConfiguration(Application.class)
  public class ApplicationTests {
  
  	@Autowired
  	private RedisTemplate<String, User> redisTemplate;
  
  	@Test
  	public void test() throws Exception {
  
  		// 保存對象
  		User user = new User("超人", 20);
  		redisTemplate.opsForValue().set(user.getUsername(), user);
  
  		user = new User("蝙蝠俠", 30);
  		redisTemplate.opsForValue().set(user.getUsername(), user);
  
  		user = new User("蜘蛛俠", 40);
  		redisTemplate.opsForValue().set(user.getUsername(), user);
  
  		Assert.assertEquals(20, redisTemplate.opsForValue().get("超人").getAge().longValue());
  		Assert.assertEquals(30, redisTemplate.opsForValue().get("蝙蝠俠").getAge().longValue());
  		Assert.assertEquals(40, redisTemplate.opsForValue().get("蜘蛛俠").getAge().longValue());
  
  	}
  
  }
  

  　　

  當然spring-data-redis中提供的數據操作遠不止這些，本文僅作為在Spring Boot中使用redis時的配置參考，更多對於redis的操作使用，請參考Spring-data-redis Reference。

• 源碼來源

Spring Boot教程（三十四）使用Redis數據庫（2）