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

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

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:

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

***.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

环境

java 17

springboot 3.0.4

fastjson 2.0.22

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

寻找问题根源

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

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 ***.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

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a***eptNames,理解意思大概是支持的名称?

于是我就尝试了有参构造序列化

import ***.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[] a***eptNames = {"org.springframework.security.core.authority.SimpleGrantedAuthority"};
        GenericFastJsonRedisSerializer serializer = new GenericFastJsonRedisSerializer(a***eptNames);
        
        // 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;
    }
}

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[] a***eptNames = {"org.springframework.security.core.authority.SimpleGrantedAuthority"};
  1. 使用带参序列化对象

GenericFastJsonRedisSerializer serializer = new GenericFastJsonRedisSerializer(a***eptNames);

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