解决com.alibaba.fastjson.JSONException：autoType is not support问题，Redis FastJson

朴灿烈づ我的快乐病毒、 2024-03-25 19:23 43阅读 0赞

### 前言 ###

最近在配置redis序列化问题的时候，使用fastjson来进行序列化，报异常：

com.alibaba.fastjson.JSONException: autoType is not support. org.springframework.security.core.authority.SimpleGrantedAuthority

com.alibaba.fastjson2.JSONException: autoType is not support. org.springframework.security.core.authority.SimpleGrantedAuthority

等等问题

本次出现问题是在fastjson反序列化springsecurity的UserDetails时出现的问题，报错代码如下

![0e305d4337f09d85ce090588c0a101d9.png][]

### 环境 ###

java 17

springboot 3.0.4

fastjson 2.0.22

<dependency>
                <groupId>com.alibaba</groupId>
                <artifactId>fastjson</artifactId>
                <version>2.0.22</version>
            </dependency>

### 寻找问题根源 ###

![b8c8b4c8f3ea00a2d2f2d8cff9eddfd4.png][]

提示问题出现在ObjectReaderProvider.java:734行，这里autoTypeSupport默认是true

![eaa7226648f954eae30257c1c835b199.png][]

大致意思是，类型没有在白名单范围之内，找了很多个博主的帖子，都没有可行的解决方案，可能是我用的版本比较高fastjson 2.0.22吧，其他博主的帖子都是fastjson1.x的。

这下面是我的Redis配置

import com.alibaba.fastjson.support.spring.GenericFastJsonRedisSerializer;
    import org.springframework.cache.annotation.CachingConfigurerSupport;
    import org.springframework.cache.annotation.EnableCaching;
    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.StringRedisSerializer;
    
    /**
     * @description 缓存配置类
     * @author ouyang
     * @version 1.0
     * @date 2023-03-14 8:25
     */
    @Configuration
    @EnableCaching
    public class RedisConfig extends CachingConfigurerSupport {
    
        @Bean
        @SuppressWarnings(value = { "unchecked", "rawtypes" })
        public RedisTemplate<Object, Object> redisTemplate(RedisConnectionFactory connectionFactory) {
            RedisTemplate<Object, Object> template = new RedisTemplate<>();
            template.setConnectionFactory(connectionFactory);
            GenericFastJsonRedisSerializer serializer = new GenericFastJsonRedisSerializer();
            // 使用GenericFastJsonRedisSerializer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;
        }
    }

现在只需要给fastjson添加白名单就行了

#### 尝试1（高版本不支持） ####

通过修改全局对象的方式进行白名单设置

![c41e1b6bb83009c979e8337853d30afd.png][]

#### 尝试2（高版本不支持） ####

配置jvm启动参数，上面都不支持，这个应该也不支持

#### 尝试3（成功） ####

查看GenericFastJsonRedisSerializer源码，发现里面有两个构造函数，一个无参（我现在用的），另一个是contextFilter我也不知道是干嘛的，但是发现参数名竟然是acceptNames，理解意思大概是支持的名称？

![4a56c43e692d8c8c9feef49e40d652e6.png][]

于是我就尝试了有参构造序列化

import com.alibaba.fastjson.support.spring.GenericFastJsonRedisSerializer;
    import org.springframework.cache.annotation.CachingConfigurerSupport;
    import org.springframework.cache.annotation.EnableCaching;
    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.StringRedisSerializer;
    
    /**
     * @description 缓存配置类
     * @author ouyang
     * @version 1.0
     * @date 2023-03-14 8:25
     */
    @Configuration
    @EnableCaching
    public class RedisConfig extends CachingConfigurerSupport {
    
        @Bean
        @SuppressWarnings(value = { "unchecked", "rawtypes" })
        public RedisTemplate<Object, Object> redisTemplate(RedisConnectionFactory connectionFactory) {
            RedisTemplate<Object, Object> template = new RedisTemplate<>();
            template.setConnectionFactory(connectionFactory);
    
            // 解决autoType is not support.xxxx.xx的问题
            String[] acceptNames = {"org.springframework.security.core.authority.SimpleGrantedAuthority"};
            GenericFastJsonRedisSerializer serializer = new GenericFastJsonRedisSerializer(acceptNames);
            
            // 使用GenericFastJsonRedisSerializer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;
        }
    }

![2ff27699c141a49516882ba698a1e7e1.png][]

重启服务后发现成功了！

### 总结 ###

在redis序列化配置中使用带参数的GenericFastJsonRedisSerializer，然后添加不支持的类名即可

1.  添加不支持的类名

String[] acceptNames = {"org.springframework.security.core.authority.SimpleGrantedAuthority"};

1.  使用带参序列化对象

GenericFastJsonRedisSerializer serializer = new GenericFastJsonRedisSerializer(acceptNames);

[0e305d4337f09d85ce090588c0a101d9.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/25/e01542ddd07a4d5ca988ef125cbb7b79.png
[b8c8b4c8f3ea00a2d2f2d8cff9eddfd4.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/25/56e64256d3bb4c43b162fbe16648bca3.png
[eaa7226648f954eae30257c1c835b199.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/25/b9df5ebebf3745718e7928c41e83e1d7.png
[c41e1b6bb83009c979e8337853d30afd.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/25/a44720239c9c4c5fac6da7e78ba244f7.png
[4a56c43e692d8c8c9feef49e40d652e6.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/25/1660032b124d45a288c4d74e46c32d85.png
[2ff27699c141a49516882ba698a1e7e1.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/25/e51681e8341a4f60a6444517bcd6716a.png