以下のJSONコンテンツを解析する必要があります。現在、私はそれをファイルに保存し、それを読み込んでいます。私は作成されたサンプルのPOJOクラスと以下で試したコードを与えました。配列の文字列を解析するGson
は、2つの異なるアプローチを試してみましたが、両方が次のエラー
Exception in thread "main" com.google.gson.JsonSyntaxException: java.lang.IllegalStateException: Expected BEGIN_ARRAY but was BEGIN_OBJECT at line 1 column 3 path $
JSONファイル
{
"DeviceCommon": {
"ASIdentifier": "123",
"DatadeliveyMechanism": "notify",
"MobileOriginatorCallbackReference": {
"url": "http://application.example.com/inbound/notifications/modatanotification/"
},
"AccessiblityCallbackReference": {
"url": "http://application.example.com/inbound/notifications/accessibilitystatusnotification"
}
},
"DeviceList": [{
"ExternalIdentifer": "[email protected]",
"msisdn": "123456",
"senderName": "Device1",
"MobileOriginatorCallbackReference": {
"notifyURL": "http://application.example.com/inbound/notifications/modatanotification/"
},
"ConfigurationResultCallbackReference": {
"notifyURL": "http://application.example.com/inbound/notifications/configurationResult"
},
"ASreferenceID": "AS000001",
"NIDDduration": "1d"
}]
}
POJOクラス与えている:
注:私はここでの唯一の2つのクラスを言及しています。
package com.As.jsonmodel.configrequest;
import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
@JsonIgnoreProperties(ignoreUnknown = true)
public class ConfigurationRequest
{
private DeviceList[] DeviceList;
private DeviceCommon DeviceCommon;
public DeviceList[] getDeviceList()
{
return DeviceList;
}
public void setDeviceList (DeviceList[] DeviceList)
{
this.DeviceList = DeviceList;
}
public DeviceCommon getDeviceCommon()
{
return DeviceCommon;
}
public void setDeviceCommon (DeviceCommon DeviceCommon)
{
this.DeviceCommon = DeviceCommon;
}
@Override
public String toString()
{
return "ClassPojo [DeviceList = "+DeviceList+", DeviceCommon = "+DeviceCommon+"]";
}
}
package com.As.jsonmodel.configrequest;
public class DeviceList
{
private MobileOriginatorCallbackReference MobileOriginatorCallbackReference;
private String NIDDduration;
private String ASreferenceID;
private String senderName;
private String ExternalIdentifer;
private String msisdn;
private ConfigurationResultCallbackReference ConfigurationResultCallbackReference;
public MobileOriginatorCallbackReference getMobileOriginatorCallbackReference()
{
return MobileOriginatorCallbackReference;
}
public void setMobileOriginatorCallbackReference (MobileOriginatorCallbackReference MobileOriginatorCallbackReference)
{
this.MobileOriginatorCallbackReference = MobileOriginatorCallbackReference;
}
public String getNIDDduration()
{
return NIDDduration;
}
public void setNIDDduration (String NIDDduration)
{
this.NIDDduration = NIDDduration;
}
public String getASreferenceID()
{
return ASreferenceID;
}
public void setASreferenceID (String ASreferenceID)
{
this.ASreferenceID = ASreferenceID;
}
public String getSenderName()
{
return senderName;
}
public void setSenderName (String senderName)
{
this.senderName = senderName;
}
public String getExternalIdentifer()
{
return ExternalIdentifer;
}
public void setExternalIdentifer (String ExternalIdentifer)
{
this.ExternalIdentifer = ExternalIdentifer;
}
public String getMsisdn()
{
return msisdn;
}
public void setMsisdn (String msisdn)
{
this.msisdn = msisdn;
}
public ConfigurationResultCallbackReference getConfigurationResultCallbackReference()
{
return ConfigurationResultCallbackReference;
}
public void setConfigurationResultCallbackReference (ConfigurationResultCallbackReference ConfigurationResultCallbackReference)
{
this.ConfigurationResultCallbackReference = ConfigurationResultCallbackReference;
}
@Override
public String toString()
{
return "ClassPojo [MobileOriginatorCallbackReference = "+MobileOriginatorCallbackReference+", NIDD duration = "+NIDDduration+", AS referenceID = "+ASreferenceID+", senderName = "+senderName+", ExternalIdentifer = "+ExternalIdentifer+", msisdn = "+msisdn+", ConfigurationResultCallbackReference = "+ConfigurationResultCallbackReference+"]";
}
}
JSONリーダー
Approach1:
BufferedReader br = null;
try {
br = new BufferedReader(
new FileReader("/home/raj/apache-tomcat-8.0.3/webapps/file.json"));
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
JsonReader jsonReader = new JsonReader(new FileReader("/home/raj/apache-tomcat-8.0.3/webapps/file.json"));
jsonReader.beginObject();
while (jsonReader.hasNext()) {
String name = jsonReader.nextName();
if (name.equals("DeviceCommon")) {
readApp(jsonReader);
}
}
jsonReader.endObject();
jsonReader.close();
}
public static void readApp(JsonReader jsonReader) throws IOException{
jsonReader.beginObject();
while (jsonReader.hasNext()) {
String name = jsonReader.nextName();
System.out.println(name);
if (name.contains("ASIdentifier")){
jsonReader.beginObject();
while (jsonReader.hasNext()) {
String n = jsonReader.nextName();
if (n.equals("MobileOriginatorCallbackReference")){
System.out.println(jsonReader.nextString());
}
if (n.equals("AccessiblityCallbackReference")){
System.out.println(jsonReader.nextInt());
}
if (n.equals("DeviceList")){
jsonReader.beginArray();
while (jsonReader.hasNext()) {
System.out.println(jsonReader.nextString());
}
jsonReader.endArray();
}
}
jsonReader.endObject();
}
}
jsonReader.endObject();
}
// TODO Auto-generated method stub
Aproach2:
Gson gson = new Gson();
DeviceList [] myTypes = gson.fromJson(new FileReader("/home/raj/apache-tomcat-8.0.3/webapps/file.json"), DeviceList[].class);
System.out.println(gson.toJson(myTypes));
このファイルを解析する方法に関する参考情報は参考になります。
あなたが真剣にちょうど** HTTPを使用することを検討してください可能性があります。 org/** JSONをコピーして、文字通りGSONがこのファイルを解析するクラスを取得します(入力形式として 'JSON'、ライブラリとして' GSON'を設定してください)。 – EpicPandaForce
'DeviceList [] myTypes = gson .fromJson(.../file.json) 'あなたのJSONは配列を保持していませんが、o配列を保持するbject。 'ConfigurationRequest cr = gson.fromJson(.../file.json)'を使い、 'cr.getDeviceList()'を返す返されたオブジェクトのget配列から取得します。 – Pshemo
なぜ 'ConfigurationRequest'の代わりに' DeviceList [] '型を使用しますか? – njzk2