FastJSON是一个很好的java开源json工具类库，相比其他同类的json类库，它的速度的确是fast，最快！但是文档做得不好，在应用前不得不亲测一些功能。

实际上其他的json处理工具都和它差不多，api也有几分相似。(Fastjson Java is a very good open source JSON tool library, compared to other similar classes of JSON, its speed is fast, the fastest! But the document does not do well in the application to pro test some function. In fact, JSON processing tools the other and it is similar to that of API is somewhat similar.)