spring-data-redis注册fastjson序列化工具

　　使用spring-data-redis的时候，其序列化工具自带：

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" 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这些类，进行序列化，主要使用的是Jackson2JsonRedisSerializer,编码如下：

　　

　　@Bean
　　@SuppressWarnings({ "rawtypes", "unchecked" })
    public Jackson2JsonRedisSerializer jackson2JsonRedisSerializer() {
        Jackson2JsonRedisSerializer<Object> jackson2JsonRedisSerializer = new Jackson2JsonRedisSerializer(Object.class);
        ObjectMapper om = new ObjectMapper();
        om.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY);
        om.enableDefaultTyping(ObjectMapper.DefaultTyping.NON_FINAL);
        jackson2JsonRedisSerializer.setObjectMapper(om);
        return jackson2JsonRedisSerializer;
    }

    @Bean
    @SuppressWarnings("rawtypes")
    public RedisTemplate<String, String> redisTemplate(RedisConnectionFactory factory, RedisSerializer fastJson2JsonRedisSerializer) {
        StringRedisTemplate template = new StringRedisTemplate(factory);

        template.setValueSerializer(fastJson2JsonRedisSerializer);

        template.afterPropertiesSet();
        return template;
    }

但是使用jackson会有一个问题，因为我springMVC同样是使用的jackson，这样的话由于一些发送给前端的json是需要一定的处理的，如jsonIgnore之类的，这样会在进行缓存时同样处理掉，达不到缓存的目的，于是决定在spring-data-redis进行缓存时，将jackson的序列化由fastjson替换掉。

　　首先需要一个RedisSerializer：

public class FastJson2JsonRedisSerializer<T> implements RedisSerializer<T> {

    public static final Charset DEFAULT_CHARSET = Charset.forName("UTF-8");

    private Class<T> clazz;

    public FastJson2JsonRedisSerializer(Class<T> clazz) {
        super();
        this.clazz = clazz;
    }

    public byte[] serialize(T t) throws SerializationException {
        if (t == null) {
            return new byte[0];
        }
        return JSON.toJSONString(t, SerializerFeature.WriteClassName).getBytes(DEFAULT_CHARSET);
    }

    public T deserialize(byte[] bytes) throws SerializationException {
        if (bytes == null || bytes.length <= 0) {
            return null;
        }
        String str = new String(bytes, DEFAULT_CHARSET);

        return (T) JSON.parseObject(str, clazz);
    }

}

　　 此类需要实现RedisSerializer接口。

　　然后set到RedisTemplate上：

　　

    @Bean
    @SuppressWarnings("rawtypes")
    public RedisSerializer fastJson2JsonRedisSerializer() {
        return new FastJson2JsonRedisSerializer<Object>(Object.class);
    }

    @Bean
    @SuppressWarnings("rawtypes")
    public RedisTemplate<String, String> redisTemplate(RedisConnectionFactory factory, RedisSerializer fastJson2JsonRedisSerializer) {
        StringRedisTemplate template = new StringRedisTemplate(factory);

        template.setValueSerializer(fastJson2JsonRedisSerializer);

        template.afterPropertiesSet();
        return template;
    }

　　结束