GSON预计BEGIN_ARRAY但是BEGIN_OBJECT?

时间:2015-07-22 17:44:22

标签: java android web-services gson

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
}

进入对象

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<String> mRoleSGBD;
    @SerializedName("RoleSI")
    private List<String> 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<HabilitationBean>> mHabilitationAD = new HashMap<String, List<HabilitationBean>>();
    @SerializedName("HabilitationInterprete")
    private Map<String,List<HabilitationBean>> mHabilitationInterprete = new HashMap<String, List<HabilitationBean>>();
//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

但它让我感到兴奋

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!

修改

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&gt;

 @SerializedName("HabilitationAD")
        private Map<String,List<HabilitationBean>> mHabilitationAD = new HashMap<String, List<HabilitationBean>>();
        @SerializedName("HabilitationInterprete")
        private Map<String,List<HabilitationBean>> mHabilitationInterprete = new HashMap<String, List<HabilitationBean>>(); 

如果我评论这个属性我没有任何问题来构建我的json objet。

我找到了这个链接Deserializing a Map<String, Object> field with Gson

目前我尝试这样的事情

public class InfoSecuriteBeanDeserializer implements JsonDeserializer<InfoSecuriteBean> {

    @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?

3 个答案:

答案 0 :(得分:2)

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。

答案 1 :(得分:2)

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,也许这会帮助一些人。

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<BeanHabilitation> mValue;

    public String getmKey() {
        return mKey;
    }

    public void setmKey(String mKey) {
        this.mKey = mKey;
    }

    public List<BeanHabilitation> getmValue() {
        return mValue;
    }

    public void setmValue(List<BeanHabilitation> mValue) {
        this.mValue = mValue;
    }

    public HabilitationAD(){

    }

    public HabilitationAD(String p_mKey, List<BeanHabilitation> p_mValue){
        this.mKey = p_mKey;
        this.mValue = p_mValue;
    }
}

和:

    public class HabilitationInterprete {

        @SerializedName("Key")
        private String mKey;

        @SerializedName("Value")
        private List<BeanHabilitation> mValue;

        public String getmKey() {
            return mKey;
        }

        public void setmKey(String mKey) {
            this.mKey = mKey;
        }

        public List<BeanHabilitation> getmValue() {
            return mValue;
        }

        public void setmValue(List<BeanHabilitation> mValue) {
            this.mValue = mValue;
        }

 public HabilitationInterprete(){

    }

    public HabilitationInterprete(String p_mKey, List<BeanHabilitation> p_mValue){
        this.mKey = p_mKey;
        this.mValue = p_mValue;
    }

我修改了我的班级InfoSecuriteBean

我改变了这个:

 @SerializedName("HabilitationAD")
    private Map<String,List<HabilitationBean>> mHabilitationAD = new HashMap<String, List<HabilitationBean>>();
    @SerializedName("HabilitationInterprete")
    private Map<String,List<HabilitationBean>> mHabilitationInterprete = new HashMap<String, List<HabilitationBean>>();

由此:

@SerializedName("HabilitationAD")
    private List<HabilitationAD> habilitationAD;
    @SerializedName("HabilitationInterprete")
    private List<HabilitationInterprete> habilitationInterprete;

现在一切都很棒!希望这个解决方案有所帮助!

答案 2 :(得分:0)

您获得的错误非常标准。 Gson无法反序列化嵌套对象。要写自己的适配器。

所以你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。