我想使用java从JSON中提取相同id的值

Question

所以json看起来像这个

{
"cover":"AddressBook",
"Addresses":[
{
"id":"1",
"NickName":"Rahul",
"ContactName":"Dravid",
"Company":"Cricket",
"City":"Indore",
"Country":"India",
"Type":"Address"
},
{
"id":"2",
"NickName":"Sachin",
"ContactName":"Tendulkar",
"Company":"Cricket",
"City":"Mumbai",
"Country":"India",
"Type":"Address"
}
]

}

我想使用JSON数组从id=1中提取数据，但我不确定如何使用语法或其他方式。我的代码是：

JSONParser jsonParser = new JSONParser();
FileReader reader = new FileReader("AddressBook.json");
Object obj = jsonParser.parse(reader);
address = (JSONArray)obj;

Answer 1

您必须循环通过"地址"；大堆

JSONObject addressBook = (JSONObject) jsonParser.parse(reader);
JSONArray addresses = (JSONArray) addressBook.get("Addresses");
JSONObject address = null;
for (Object find : addresses) {
if (((JSONObject) find).get("id").equals("1")) {
address = (JSONObject) find;
}
}
System.out.println(address.toJSONString());

输出

{"Company":"Cricket","Type":"Address","Country":"India","id":"1","City":"Indore","NickName":"Rahul","ContactName":"Dravid"}