就差一步了。。求救JSON问题

{"folders":[{"children":[{"dID":1,"text":"文档1"},{"dID":3,"text":"文档3"},{"dID":2,"text":"文档2"}],"folderName":"文件夹1","iconCls":"icon-ok","id":1},{"children":[{"dID":4,"text":"文档4"}],"folderName":"文件夹2","iconCls":"icon-ok","id":2}]}
请问我如何把前面   {"folders":    和最后那个 } 给去掉呢??因为ACTION里有这个集合,用来返回数据的。。如果我把他删了就没有数据返回了
private List<Folder> folders;现在我只想要这样的格式.请问有办法吗?[{"children":[{"dID":1,"text":"文档1"},{"dID":3,"text":"文档3"},{"dID":2,"text":"文档2"}],"folderName":"文件夹1","iconCls":"icon-ok","id":1},{"children":[{"dID":4,"text":"文档4"}],"folderName":"文件夹2","iconCls":"icon-ok","id":2}]只有35分了。。帮帮忙谢谢~!!!!