【Spring Boot 3 + fastjson2】更改RedisTemplate的序列化策略

在Spring Boot 3中，若要使用fastjson2作为RedisTemplate的序列化策略，你需要自定义配置类来覆盖默认的配置。以下是一个示例代码：

import com.alibaba.fastjson2.JSON;
import com.alibaba.fastjson2.serializer.SerializerFeature;
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.RedisSerializer;
import java.nio.charset.StandardCharsets;
 
@Configuration
public class RedisConfig {
 
    @Bean
    public RedisTemplate<Object, Object> redisTemplate(RedisConnectionFactory redisConnectionFactory) {
        RedisTemplate<Object, Object> template = new RedisTemplate<>();
        template.setConnectionFactory(redisConnectionFactory);
 
        // 使用fastjson序列化
        FastJson2JsonRedisSerializer fastJson2JsonRedisSerializer = new FastJson2JsonRedisSerializer(Object.class);
 
        // 设置值（value）的序列化器
        template.setValueSerializer(fastJson2JsonRedisSerializer);
        // 设置键（key）的序列化器
        template.setKeySerializer(fastJson2JsonRedisSerializer);
        // 设置哈希键的序列化器
        template.setHashKeySerializer(fastJson2JsonRedisSerializer);
        // 设置哈希值的序列化器
        template.setHashValueSerializer(fastJson2JsonRedisSerializer);
 
        template.afterPropertiesSet();
        return template;
    }
 
    public static class FastJson2JsonRedisSerializer<T> implements RedisSerializer<T> {
        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, SerializerFeature.WriteClassName).getBytes(StandardCharsets.UTF_8);
        }
 
        @Override
        public T deserialize(byte[] bytes) throws SerializationException {
            if (bytes == null || bytes.length <= 0) {
                return null;
            }
            String str = new String(bytes, StandardCharsets.UTF_8);
            return JSON.parseObject(str, clazz);
        }
    }
}

在这个配置类中，我们定义了一个RedisTemplate的Bean，并且使用了自定义的FastJson2JsonRedisSerializer作为序列化器。这个序列化器使用fastjson2库将对象序列化为JSON字符串，并在反序列化时指