fastjson1.2.9解析带abstract方法枚举栈溢出剖析

一、案例背景

一个类里面添加了枚举，通过fastjson把该类解析为json的过程报错。

二、 案例现场

定义一个带abstract方法的枚举

 public enum OpenSourceEnum {
   
    BILIBILI("bilibili") {
   
        @Override
        public Integer getUid(Integer mid, String openId) {
   
            return mid;
        }
    },
    MISSEVAN("missevan") {
   
        @Override
        public Integer getUid(Integer mid, String openId) {
   
            return Integer.valueOf(openId);
        }
    };
    public final String code;
    OpenSourceEnum(String code) {
   
        this.code = code;
    }
 
    public String getCode() {
   
        return code;
    }
    public abstract Integer getUid(Integer mid, String openId);
}

然后解析为json

com.alibaba.fastjson.JSON.toJSON(OpenSourceEnum.BILIBILI)

递归死循环造成栈溢出

Exception in thread "main" com.alibaba.fastjson.JSONException: toJSON error
at com.alibaba.fastjson.JSON.toJSON(JSON.java:651)
at com.alibaba.fastjson.JSON.toJSON(JSON.java:570)
at com.alibaba.fastjson.JSON.toJSON(JSON.java:642)
at com.alibaba.fastjson.JSON.toJSON(JSON.java:570)
at com.alibaba.fastjson.JSON.toJSON(JSON.java:624)
at com.alibaba.fastjson.JSON.