GSON预计BEGIN_ARRAY但是BEGIN_OBJECT？
我刚开始学习gson。 我看到很多关于这个错误的话题，但我没有找到任何与我的问题相对应的帮助或答案。
我正在尝试解析像这样的JSON字符串：
{ "CodeAnalytique": "XXXX", "Domaine": "XXXX", "HabilitationAD": [ { "Key": "XXXX", "Value": [ { "Applicatif": "XXXX", "Cle": "E", "Role": "Red", "Valeur": "XXXX" }, { "Applicatif": "XXXX", "Cle": "E", "Role": "Red", "Valeur": "XXXX" } //lot of other value ] } ], "HabilitationInterprete": [ { "Key": "XX", "Value": [ { "Applicatif": "XXXX", "Cle": "Z", "Role": "Red", "Valeur": "XXX" }, { "Applicatif": "XXXX", "Cle": "Z", "Role": "Red", "Valeur": "XXXX" } //lot of other value ] } ], "Identity": "XXXX", "InfoConsolidee": "Operation requested at XXXX", "IsAdminI": true, "IsAdminM": false, "IsAuthentif": true, "Matricule": "XXX", "Nom": "XXXX", "PasswordEnvoye": "XXXX", "Prenom": "XXX", "PrincipalPermissionMode": 1, "RoleSGBD": [ "xxxx" ], "RoleSI": [ null, "APP_02", "APP_03", //lot of other value ], "Societe": "XXX", "TypeClient": null } 成对象
InfoSecuriteBean mInfoSecuriteBean = gson.fromJson(reader, InfoSecuriteBean.class);
这是我正在使用的对象类。
import com.google.gson.annotations.SerializedName; import java.util.HashMap; import java.util.List; import java.util.Map; public class InfoSecuriteBean { @SerializedName("IsAuthentif") private boolean mIsAuthentif = false; @SerializedName("PrincipalPermissionMode") private enumPrincipalPermissionMode mPrincipalPermissionMode; @SerializedName("RoleSGBD") private List mRoleSGBD; @SerializedName("RoleSI") private List mRoleSI; @SerializedName("Identity") private String mIdentity = null; @SerializedName("Password") private String mPassword = null; @SerializedName("InfoConsolidee") private String mInfoConsolidee = null; @SerializedName("IsAdminM") private boolean mIsAdminM = false; @SerializedName("IsAdminI") private boolean mIsAdminI = false; @SerializedName("Matricule") private String mMatricule = null; @SerializedName("Nom") private String mNom = null; @SerializedName("Prenom") private String mPrenom = null; @SerializedName("CodeAnalytique") private String mCodeAnalytique = null; @SerializedName("Domaine") private String mDomaine = null; @SerializedName("Societe") private String mSociete = null; @SerializedName("TypeClient") private String mTypeClient = null; @SerializedName("HabilitationAD") private Map<String,List> mHabilitationAD = new HashMap<String, List>(); @SerializedName("HabilitationInterprete") private Map<String,List> mHabilitationInterprete = new HashMap<String, List>(); //Getter and setter
和另一个对象使用
import com.google.gson.annotations.SerializedName; public class HabilitationBean { @SerializedName("Applicatif") private String mApplicatif = null; @SerializedName("Role") private String mRole = null; @SerializedName("Cle") private String mCle = null; @SerializedName("Valeur") private String mValeur = null; //getter and setter
但它让我感到高兴
com.google.gson.JsonSyntaxException: java.lang.IllegalStateException: Expected BEGIN_ARRAY but was BEGIN_OBJECTat line 1 column 60
任何想法我该如何解决？
谢谢！
编辑
Caused by: com.google.gson.JsonSyntaxException: java.lang.IllegalStateException: Expected BEGIN_ARRAY but was BEGIN_OBJECT at line 1 column 60 path $.HabilitationAD[0] at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$Adapter.read(ReflectiveTypeAdapterFactory.java:200) at com.google.gson.Gson.fromJson(Gson.java:810) at com.google.gson.Gson.fromJson(Gson.java:748) at com.sig.webservice.WebSecurityGBD.doInBackground(WebSecurityGBD.java:69) at com.sig.webservice.WebSecurityGBD.doInBackground(WebSecurityGBD.java:23) at android.os.AsyncTask$2.call(AsyncTask.java:292) at java.util.concurrent.FutureTask.run(FutureTask.java:237) at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:231) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587) at java.lang.Thread.run(Thread.java:818) Caused by: java.lang.IllegalStateException: Expected BEGIN_ARRAY but was BEGIN_OBJECT at line 1 column 60 path $.HabilitationAD[0] at com.google.gson.stream.JsonReader.beginArray(JsonReader.java:350) at com.google.gson.internal.bind.MapTypeAdapterFactory$Adapter.read(MapTypeAdapterFactory.java:172) at com.google.gson.internal.bind.MapTypeAdapterFactory$Adapter.read(MapTypeAdapterFactory.java:145) at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$1.read(ReflectiveTypeAdapterFactory.java:103) at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$Adapter.read(ReflectiveTypeAdapterFactory.java:196) at com.google.gson.Gson.fromJson(Gson.java:810) at com.google.gson.Gson.fromJson(Gson.java:748) at com.sig.webservice.WebSecurityGBD.doInBackground(WebSecurityGBD.java:69) at com.sig.webservice.WebSecurityGBD.doInBackground(WebSecurityGBD.java:23) at android.os.AsyncTask$2.call(AsyncTask.java:292) at java.util.concurrent.FutureTask.run(FutureTask.java:237) at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:231) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587) at java.lang.Thread.run(Thread.java:818)
编辑2
问题来自两个HashMap>
@SerializedName("HabilitationAD") private Map<String,List> mHabilitationAD = new HashMap<String, List>(); @SerializedName("HabilitationInterprete") private Map<String,List> mHabilitationInterprete = new HashMap<String, List>();
如果我评论这个属性我没有任何问题来构建我的json objet。
我发现这个链接用Gson反序列化一个Map 字段
目前我尝试这样的事情
public class InfoSecuriteBeanDeserializer implements JsonDeserializer { @Override public InfoSecuriteBean deserialize(JsonElement json, Type type, JsonDeserializationContext jsonDeserializationContext) throws JsonParseException { JsonArray jArray = (JsonArray) json; InfoSecuriteBean mInfoSecuriteBean = new InfoSecuriteBean(); for (int i=1; i<jArray.size(); i++) { JsonObject jObject = (JsonObject) jArray.get(i); //assuming you have the suitable constructor... HabilitationBean mHabilitationBean = new HabilitationBean(jObject.get("Applicatif").getAsString(), jObject.get("Cle").getAsString(), jObject.get("Role").getAsString(), jObject.get("Valeur").getAsString()); mInfoSecuriteBean.getmHabilitationAD().add(mHabilitationBean); } return mInfoSecuriteBean; } }
你认为我是解决问题的好方法吗？
升级到最新的Gson，它会告诉你哪里有不匹配的地方。 通常，当您的模型具有List但您的JSON没有（即没有[...] ）时会发生这种情况。
我找到了解决问题的简单解决方案。 我将在这里展示我的解决方案，也许这将有助于一些人。
所以我创建了两个新类：HabilitationAD和HabilitationInterprete
public class HabilitationAD { @SerializedName("Key") private String mKey; @SerializedName("Value") private List mValue; public String getmKey() { return mKey; } public void setmKey(String mKey) { this.mKey = mKey; } public List getmValue() { return mValue; } public void setmValue(List mValue) { this.mValue = mValue; } public HabilitationAD(){ } public HabilitationAD(String p_mKey, List p_mValue){ this.mKey = p_mKey; this.mValue = p_mValue; } }
并且：
public class HabilitationInterprete { @SerializedName("Key") private String mKey; @SerializedName("Value") private List mValue; public String getmKey() { return mKey; } public void setmKey(String mKey) { this.mKey = mKey; } public List getmValue() { return mValue; } public void setmValue(List mValue) { this.mValue = mValue; } public HabilitationInterprete(){ } public HabilitationInterprete(String p_mKey, List p_mValue){ this.mKey = p_mKey; this.mValue = p_mValue; }
我修改了我的类InfoSecuriteBean
我改变了这个：
@SerializedName("HabilitationAD") private Map> mHabilitationAD = new HashMap>(); @SerializedName("HabilitationInterprete") private Map> mHabilitationInterprete = new HashMap>();
这样 ：
@SerializedName("HabilitationAD") private List habilitationAD; @SerializedName("HabilitationInterprete") private List habilitationInterprete;
现在一切都很棒！ 希望这个解决方案能有所帮
你得到的错误非常标准。 Gson无法反序列化嵌套对象。 要写自己的适配器。
因此，您必须学习如何编写自定义反序列化器（非常简单），然后在创建gson对象时注册它。
随意提出更多问题。