【Redis】配置序列化器

1. 配置FastJSON2

FastJSON2相比与FastJSON更安全，更推荐使用。

import com.alibaba.fastjson2.JSON;
import com.alibaba.fastjson2.JSONReader;
import com.alibaba.fastjson2.JSONWriter;
import com.alibaba.fastjson2.filter.Filter;

import org.springframework.data.redis.serializer.RedisSerializer;
import org.springframework.data.redis.serializer.SerializationException;

import java.nio.charset.Charset;

/**
 * Redis使用FastJson序列化
 * 
 * @author ruoyi
 */
public class FastJson2JsonRedisSerializer<T> implements RedisSerializer<T>
{
    /**
     * 自动识别json对象白名单配置（仅允许解析的包名，范围越小越安全）
     */
    public static final String[] JSON_WHITELIST_STR = { "org.springframework", "im.zhaojun" };

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

    static final Filter AUTO_TYPE_FILTER = JSONReader.autoTypeFilter(JSON_WHITELIST_STR);

    private Class<T> clazz;

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

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

    @Override
    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, AUTO_TYPE_FILTER);
    }
}

2. 配置Redis序列化器

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.redis.connection.RedisConnectionFactory;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.serializer.GenericJackson2JsonRedisSerializer;
import org.springframework.data.redis.serializer.RedisSerializer;
import org.springframework.data.redis.serializer.StringRedisSerializer;
@Configuration
public class RedisConfig {
    @Bean
    public RedisTemplate<Object, Object> redisTemplate(RedisConnectionFactory connectionFactory) {
//        //1.创建
//        RedisTemplate<String, Object> redisTemplate = new RedisTemplate<>();
//        redisTemplate.setConnectionFactory(connectionFactory);
//        //json序列化工具
//        GenericJackson2JsonRedisSerializer serializer = new GenericJackson2JsonRedisSerializer();
//        //设置key的序列化
//        //StringRedisSerializer UTF_8 = new StringRedisSerializer(StandardCharsets.UTF_8);
//        redisTemplate.setKeySerializer(RedisSerializer.string());
//        redisTemplate.setHashKeySerializer(RedisSerializer.string());
//        //设置值的value
//        redisTemplate.setValueSerializer(serializer);
//        redisTemplate.setHashValueSerializer(serializer);
//        return redisTemplate;
        RedisTemplate<Object, Object> template = new RedisTemplate<>();
        template.setConnectionFactory(connectionFactory);



        FastJson2JsonRedisSerializer serializer = new FastJson2JsonRedisSerializer(Object.class);


        // 使用StringRedisSerializer来序列化和反序列化redis的key值
        template.setKeySerializer(new StringRedisSerializer());
        template.setValueSerializer(serializer);

        // Hash的key也采用StringRedisSerializer的序列化方式
        template.setHashKeySerializer(new StringRedisSerializer());
        template.setHashValueSerializer(serializer);

        template.afterPropertiesSet();
        return template;
    }
}