将数据编码为 JSON
如果你需要创建 JSONObject
并将数据放入其中,请考虑以下示例:
// Create a new javax.json.JSONObject instance.
JSONObject first = new JSONObject();
first.put("foo", "bar");
first.put("temperature", 21.5);
first.put("year", 2016);
// Add a second object.
JSONObject second = new JSONObject();
second.put("Hello", "world");
first.put("message", second);
// Create a new JSONArray with some values
JSONArray someMonths = new JSONArray(new String[] { "January", "February" });
someMonths.put("March");
// Add another month as the fifth element, leaving the 4th element unset.
someMonths.put(4, "May");
// Add the array to our object
object.put("months", someMonths);
// Encode
String json = object.toString();
// An exercise for the reader: Add pretty-printing!
/* {
"foo":"bar",
"temperature":21.5,
"year":2016,
"message":{"Hello":"world"},
"months":["January","February","March",null,"May"]
}
*/