现在JAVA 对象如下：

@Data
@NoArgsConstructor
public class ResourceTreeDto implements Serializable, Comparable<ResourceTreeDto> {

   
    private Collection<ResourceTreeDto> children = new TreeSet<>();
}

该对象需要存进redis里面，序列化进去，没发现问题，但反序列化时，报如下错

com.alibaba.fastjson.JSONException: syntax error, expect {, actual TreeSet, pos 1718, fieldName menuTree, fastjson-version 1.2.39
    at com.alibaba.fastjson.parser.deserializer.JavaBeanDeserializer.deserialze(JavaBeanDeserializer.java:451) ~[fastjson-1.2.39.jar:na]
    at com.alibaba.fastjson.parser.deserializer.JavaBeanDeserializer.parseRest(JavaBeanDeserializer.java:1234) ~[fastjson-1.2.39.jar:na]
    at com.alibaba.fastjson.parser.deserializer.FastjsonASMDeserializer_4_ResourceTreeDto.deserialze(Unknown Source) ~[na:na]
    at com.alibaba.fastjson.parser.deserializer.JavaBeanDeserializer.deserialze(JavaBeanDeserializer.java:267) ~[fastjson-1.2.39.jar:na]
    at com.alibaba.fastjson.parser.deserializer.DefaultFieldDeserializer.parseField(DefaultFieldDeserializer.java:80) ~[fastjson-1.2.39.jar:na]
    at com.alibaba.fastjson.parser.deserializer.JavaBeanDeserializer.parseField(JavaBeanDeserializer.java:1061) ~[fastjson-1.2.39.jar:na]
    at com.alibaba.fastjson.parser.deserializer.JavaBeanDeserializer.deserialze(JavaBeanDeserializer.java:756) ~[fastjson-1.2.39.jar:na]

经查，原来是fastjson不支持泛型，修改原有的对象即可：

@Data
@NoArgsConstructor
public class ResourceTreeDto implements Serializable, Comparable<ResourceTreeDto> {

    private static final long serialVersionUID =  
    /**
     * 子节点列表，去掉泛形。
     */
    private Collection  children = new TreeSet();

去掉泛形后序列化一起正常。