美好的一天，我正在尝试使用jackson 2.1.1解析以下JSONObject（如下所示）我已经读过你可以将令牌流和节点树解析结合起来，到目前为止我已经提出了这个。
private void parseForecast(JSONObject jobj2) {
String description = null;
String condition = null;
String list = jobj2.toString();
try {
JsonFactory f = new MappingJsonFactory();
JsonParser parser = f.createJsonParser(list);
parser.nextToken(); //{
while(parser.nextToken() != JsonToken.END_OBJECT){
String currentField = parser.getCurrentName();
Log.d(TAG, "currentField is " + currentField);
if(currentField.equals("cod")){
parser.nextToken();
}else if(currentField.equals("message")){
parser.nextToken();
} else if(currentField.equals("city")){
parser.skipChildren();
}else if(currentField.equals("cnt")) {
parser.nextToken();
}else if(currentField.equals("list")){
while(parser.nextToken() != JsonToken.END_ARRAY){
Log.d(TAG, "reading the value as a tree"); //no logcat response after here
JsonNode node = parser.readValueAsTree();
for(JsonNode nodelist: node){
String date = nodelist.get("dt").asText();
String day_temp = nodelist.get("temp").path("day").asText();
String main = nodelist.get("weather").get("main").textValue();
Log.d(TAG, "date from json nodelist is " + date);
Log.d(TAG, "day from json nodelist is " + day_temp);
Log.d(TAG, "main from json nodelist is " + main);
}
}
}
}
} catch (IOException e) {
e.printStackTrace();
}
}
可以看出，我正试图在＆＃34;列表＆＃34;中获取消息。令牌数组但是在logcat消息之后我没有得到logcat反馈＆＃34; 以树的形式读取值＆＃34;甚至是错误。即使我删除了for循环，仍然没有收到任何日志消息。有什么想法吗？我猜JsonNode以某种方式打破循环或其他东西。还是我错误地解析它？我不知所措。
Json对象
{
"cod": "200",
"message": 0.0029,
"city": {
"id": 2643743,
"name": "London",
"coord": {
"lon": -0.12574,
"lat": 51.50853
},
"country": "GB",
"population": 0,
"sys": {
"population": 0
}
},
"cnt": 3,
"list": [
{
"dt": 1421755200,
"temp": {
"day": 271.55,
"min": 271.21,
"max": 275.15,
"night": 275.15,
"eve": 273.92,
"morn": 271.21
},
"pressure": 1019.21,
"humidity": 100,
"weather": [
{
"id": 500,
"main": "Rain",
"description": "light rain",
"icon": "10d"
}
],
"speed": 2.26,
"deg": 166,
"clouds": 64,
"rain": 1
},
{
"dt": 1421841600,
"temp": {
"day": 277.17,
"min": 275.34,
"max": 277.3,
"night": 275.34,
"eve": 276.21,
"morn": 275.66
},
"pressure": 1006.65,
"humidity": 98,
"weather": [
{
"id": 500,
"main": "Rain",
"description": "light rain",
"icon": "10d"
}
],
"speed": 8.18,
"deg": 138,
"clouds": 64,
"rain": 2
},
{
"dt": 1421928000,
"temp": {
"day": 276.04,
"min": 273.06,
"max": 276.3,
"night": 273.94,
"eve": 273.84,
"morn": 274.23
},
"pressure": 1017.55,
"humidity": 100,
"weather": [
{
"id": 800,
"main": "Clear",
"description": "sky is clear",
"icon": "01d"
}
],
"speed": 3.14,
"deg": 52,
"clouds": 0
}
]
}