FastJsonFactory me = FastJsonFactory.me();

me.setJsonFactory(me);

FastJson会出现循环引用的问题。

"$ref":"$.data.list[1].category"，加1个设置

SerializerFeature.DisableCircularReferenceDetect

解决它：

自定义FastJson

public class MyFastJson  extends FastJson{

public String toJson(Object object) {

// 优先使用对象级的属性 datePattern, 然后才是全局性的 defaultDatePattern

String dp = datePattern != null ? datePattern : getDefaultDatePattern();

if (dp == null) {

return JSON.toJSONString(object);

} else {

return JSON.toJSONStringWithDateFormat(object, dp, SerializerFeature.WriteDateUseDateFormat,SerializerFeature.DisableCircularReferenceDetect); // return JSON.toJSONString(object, SerializerFeature.WriteDateUseDateFormat);

}

}

}

public class MyFastJsonFactory  extends FastJsonFactory{

private static final MyFastJsonFactory me = new MyFastJsonFactory();

public static MyFastJsonFactory me() {

return me;

}

public Json getJson() {

return new MyFastJson();

}

}

   public void configConstant(Constants me) {

        me.setDevMode(p.getBoolean("devMode", true));

//me.setJsonFactory(MixedJsonFactory.me());

        MyFastJsonFactory me2 = MyFastJsonFactory.me();

me.setJsonFactory(me2);

    }

总的来说，MixedJsonFactory 好用一点。

--------------------list集合 序列化之后$ref---------------------------------------

{"category":{"$ref":"$.data.list[1].category"},"categoryId":2,"company":{"$ref":"$.data.list[0].company"},"companyId":1,"createTime":"2018-01-01 10:00:00","id":9,"name":"作物","status":0,"yn":1},{"category":{"createTime":"2018-01-01 10:00:00","id":5,"name":"烘焙蛋糕","remark":"尝试中","status":1,"updateTime":"2018-01-01 00:00:00","yn":1},"categoryId":5,"company":{"address":"北京","content":"文创第一品牌","createTime":"2018-01-02 01:00:00.0","id":2,"mobile":"15978955878","name":"北京十八字金有限公司","remark":"很不错","updateTime":"2018-01-01 00:00:00","yn":1},"companyId":2,"createTime":"2018-01-01 10:00:00","id":8,"name":"蒂丽雪思","status":0,"yn":1},{"category":{"$ref":"$.data.list[1].category"},"categoryId":2,"company":{"$ref":"$.data.list[0].company"},"companyId":1,"createTime":"2018-01-01 

@JFinal