Java 使用GSON访问JSON元素
我有一个非常大的Json对象，它类似于下面的结构Java 使用GSON访问JSON元素,java,json,gson,Java,Json,Gson,我有一个非常大的Json对象，它类似于下面的结构 { "FDN": [{ "OT": 1, "CL": [{ "K": [{ "FID": 348, "VAL": "20822548" }, { "FID": "LANGUAGE_ID", "VAL": "FR"
{
"FDN": [{
"OT": 1,
"CL": [{
"K": [{
"FID": 348,
"VAL": "20822548"
}, {
"FID": "LANGUAGE_ID",
"VAL": "FR"
}]
}],
"NK": null,
"SS": 0,
"ITID": "NEWS",
"TSID": 44969007,
"DT": "20180504123302006"
}, {
"OT": 1,
"CL": [{
"K": [{
"FID": 348,
"VAL": "20822549"
}, {
"FID": "LANGUAGE_ID",
"VAL": "AR"
}]
}],
"NK": null,
"SS": 0,
"ITID": "NEWS",
"TSID": 44969008,
"DT": "20180504123302007"
}, {
"OT": 1,
"CL": [{
"K": [{
"FID": 348,
"VAL": "20822550"
}, {
"FID": "LANGUAGE_ID",
"VAL": "FR"
}]
}],
"NK": null,
"SS": 0,
"ITID": "NEWS",
"TSID": 44969009,
"DT": "20180504123302007"
}, {
"OT": 1,
"CL": [{
"K": [{
"FID": 348,
"VAL": "20822551"
}, {
"FID": "LANGUAGE_ID",
"VAL": "AR"
}]
}],
"NK": null,
"SS": 0,
"ITID": "NEWS",
"TSID": 44969010,
"DT": "20180504123302008"
}, {
"OT": 1,
"CL": [{
"K": [{
"FID": 348,
"VAL": "20822552"
}, {
"FID": "LANGUAGE_ID",
"VAL": "FR"
}]
}],
"NK": null,
"SS": 0,
"ITID": "NEWS",
"TSID": 44969011,
"DT": "20180504123302009"
}, {
"OT": 1,
"CL": [{
"K": [{
"FID": 348,
"VAL": "20822553"
}, {
"FID": "LANGUAGE_ID",
"VAL": "FR"
}]
}],
"NK": null,
"SS": 0,
"ITID": "NEWS",
"TSID": 44969012,
"DT": "20180504123302010"
}, {
"OT": 1,
"CL": [{
"K": [{
"FID": 348,
"VAL": "20822554"
}, {
"FID": "LANGUAGE_ID",
"VAL": "FR"
}]
}],
"NK": null,
"SS": 0,
"ITID": "NEWS",
"TSID": 44969013,
"DT": "20180504123302010"
}, {
"OT": 1,
"CL": [{
"K": [{
"FID": 348,
"VAL": "20822573"
}, {
"FID": "LANGUAGE_ID",
"VAL": "AR"
}]
}],
"NK": null,
"SS": 0,
"ITID": "NEWS",
"TSID": 44969065,
"DT": "20180504080929368"
}, {
"OT": 0,
"CL": [{
"K": [{
"FID": 348,
"VAL": "20822573"
}, {
"FID": "LANGUAGE_ID",
"VAL": "AR"
}]
}],
"NK": null,
"SS": 0,
"ITID": "NEWS",
"TSID": 44969066,
"DT": "20180504080929369"
}, {
"OT": 1,
"CL": [{
"K": [{
"FID": 348,
"VAL": "20822574"
}, {
"FID": "LANGUAGE_ID",
"VAL": "AR"
}]
}],
"NK": null,
"SS": 0,
"ITID": "NEWS",
"TSID": 44969067,
"DT": "20180504082130104"
}]
}
JsonArray jsonArray = (JsonArray) convertedObject.get("FDN");
System.out.println("jsonArray>" + jsonArray.size());
List<JsonElement> CL= new ArrayList<JsonElement>();
for(int x=0; x < jsonArray.size(); x++){
JsonObject jObject4 = (JsonObject) jsonArray.get(x);
JsonElement e = jObject4.get("CL");
CL.add(jObject4.get("CL"));
}
System.out.println("CL>" + CL.get(0));
请告诉我如何访问这些结构的语言ID。以下是访问FID的代码，其值为“语言ID”以及相应的VAL
{
"FDN": [{
"OT": 1,
"CL": [{
"K": [{
"FID": 348,
"VAL": "20822548"
}, {
"FID": "LANGUAGE_ID",
"VAL": "FR"
}]
}],
"NK": null,
"SS": 0,
"ITID": "NEWS",
"TSID": 44969007,
"DT": "20180504123302006"
}, {
"OT": 1,
"CL": [{
"K": [{
"FID": 348,
"VAL": "20822549"
}, {
"FID": "LANGUAGE_ID",
"VAL": "AR"
}]
}],
"NK": null,
"SS": 0,
"ITID": "NEWS",
"TSID": 44969008,
"DT": "20180504123302007"
}, {
"OT": 1,
"CL": [{
"K": [{
"FID": 348,
"VAL": "20822550"
}, {
"FID": "LANGUAGE_ID",
"VAL": "FR"
}]
}],
"NK": null,
"SS": 0,
"ITID": "NEWS",
"TSID": 44969009,
"DT": "20180504123302007"
}, {
"OT": 1,
"CL": [{
"K": [{
"FID": 348,
"VAL": "20822551"
}, {
"FID": "LANGUAGE_ID",
"VAL": "AR"
}]
}],
"NK": null,
"SS": 0,
"ITID": "NEWS",
"TSID": 44969010,
"DT": "20180504123302008"
}, {
"OT": 1,
"CL": [{
"K": [{
"FID": 348,
"VAL": "20822552"
}, {
"FID": "LANGUAGE_ID",
"VAL": "FR"
}]
}],
"NK": null,
"SS": 0,
"ITID": "NEWS",
"TSID": 44969011,
"DT": "20180504123302009"
}, {
"OT": 1,
"CL": [{
"K": [{
"FID": 348,
"VAL": "20822553"
}, {
"FID": "LANGUAGE_ID",
"VAL": "FR"
}]
}],
"NK": null,
"SS": 0,
"ITID": "NEWS",
"TSID": 44969012,
"DT": "20180504123302010"
}, {
"OT": 1,
"CL": [{
"K": [{
"FID": 348,
"VAL": "20822554"
}, {
"FID": "LANGUAGE_ID",
"VAL": "FR"
}]
}],
"NK": null,
"SS": 0,
"ITID": "NEWS",
"TSID": 44969013,
"DT": "20180504123302010"
}, {
"OT": 1,
"CL": [{
"K": [{
"FID": 348,
"VAL": "20822573"
}, {
"FID": "LANGUAGE_ID",
"VAL": "AR"
}]
}],
"NK": null,
"SS": 0,
"ITID": "NEWS",
"TSID": 44969065,
"DT": "20180504080929368"
}, {
"OT": 0,
"CL": [{
"K": [{
"FID": 348,
"VAL": "20822573"
}, {
"FID": "LANGUAGE_ID",
"VAL": "AR"
}]
}],
"NK": null,
"SS": 0,
"ITID": "NEWS",
"TSID": 44969066,
"DT": "20180504080929369"
}, {
"OT": 1,
"CL": [{
"K": [{
"FID": 348,
"VAL": "20822574"
}, {
"FID": "LANGUAGE_ID",
"VAL": "AR"
}]
}],
"NK": null,
"SS": 0,
"ITID": "NEWS",
"TSID": 44969067,
"DT": "20180504082130104"
}]
}
public class GSONReading {
public static void main(String[] a) throws IOException {
FileReader jsonReader = new FileReader(new File("json.json"));
Gson gson = new Gson();
JsonObject jsonObject = gson.fromJson(jsonReader, JsonObject.class);
JsonArray fdnJsonArray = (JsonArray) jsonObject.get("FDN");
fdnJsonArray.forEach(jsonElement -> {
JsonArray clJsonArray = jsonElement.getAsJsonObject().get("CL").getAsJsonArray();
clJsonArray.forEach(clJsonItem -> {
JsonArray kJsonArray = clJsonItem.getAsJsonObject().get("K").getAsJsonArray();
kJsonArray.forEach(kArrayElement -> {
String fid = kArrayElement.getAsJsonObject().get("FID").getAsString();
if(fid != null && !fid.isEmpty() && fid.equalsIgnoreCase("LANGUAGE_ID")) {
String val = kArrayElement.getAsJsonObject().get("VAL").getAsString();
System.out.println(fid + ":"+ val);
}
});
});
});
}
}
LANGUAGE_ID:FR
LANGUAGE_ID:AR
LANGUAGE_ID:FR
LANGUAGE_ID:AR
LANGUAGE_ID:FR
LANGUAGE_ID:FR
LANGUAGE_ID:FR
LANGUAGE_ID:AR
LANGUAGE_ID:AR
LANGUAGE_ID:AR
请注意，我使用Java8foreach访问数组或列表中的元素。如果您使用的是java 6或java 7，您可能需要进行更改，这是可行的。谢谢兄弟。另外，如果语言ID为“AR”，请帮助我获取FID“348”的值。我在同一水平上挣扎。
LANGUAGE_ID:FR
LANGUAGE_ID:AR
LANGUAGE_ID:FR
LANGUAGE_ID:AR
LANGUAGE_ID:FR
LANGUAGE_ID:FR
LANGUAGE_ID:FR
LANGUAGE_ID:AR
LANGUAGE_ID:AR
LANGUAGE_ID:AR