我正在学习java和hadoop，我看到了无数简单txt文件的wordcount示例。如何将这个wordcount示例应用于下面的json文件？我很难具体地读入Map器的每个json对象中的每一行。
文件.json:

[
 {
  "id": 124,
  "tweet": "Hey its a beautiful day today!"
  "user": "twitter_username101"
 },
 {
  "id": 433,
  "tweet": "The worst superbowl was this year's for sure, waste of my day",
  "user": "username23"
 }
]