GSOn错误在分析JSON响应时，预期有一个字符串，但是是BEGIN_OBJECT [英] GSOn error Expected a string but was BEGIN_OBJECT when parsing JSON response

问题描述

我从API中检索JSON结果：

  [{
oid：axd7wtlk6xd2fbwlc5wk， 
id：aazzzza，
name：aazzaa，
logo：{
type：0，
data ：iVB ............. 5CYII =
，
时间戳：1438608571013，
电子邮件：[e-mail] ，
modified：test，
url：http://www.azzaa.net
}，
 {
oid ：quj3dzygfwygl5uxsbxk，
name：KZZZ，
modified：test，
timestamp：1438854099511，
id：kess 
}，...] 
  

但是当我尝试映射到客户对象I得到错误预期一个字符串，但是BEGIN_OBJECT ：

  response = webService .RequestGet（url，header）; 
 
 result = null; 
尝试{
 result = new JSONArray（response）; 
 Utils.LogWarning（response）; 
} catch（JSONException e）{
 Utils.LogError（无法加载json响应，e）; 
} 
 
键入customerType = new TypeToken< Collection< Customer>>（）{
} .getType（）; 
 ArrayList< Customer> alCustomers = null; 
 alCustomers = new Gson（）。fromJson（result.toString（），customerType）; 
  

这是我的 Customer class：

  public class Customer implements Serializable {
 private String id =; 
 private String name =; 
 private String email =; 
 private String url =; 
 private String address =; 
 private String stamp =; 
 //私有瞬态String logo =; 
私人长时间戳= 0L; 
 private String modified =; 
 ... 
  

}

<我已经通过了很多关于这个问题的答案，我也为其他类型的对象，但我找不到一个工作的解决方案。

解决方案

使用JSON结果的值创建一个模式，比如

  public class Customer {
 private String oid; 
私人字符串ID; 
私人字符串名称; 
 private String timestamp; 
私人字符串电子邮件; 
私人字符串修改; 
私人字符串网址; 
 
 public String getOid（）{
 return oid; 
} 
 
 public void setOid（String oid）{
 this.oid = oid; 
} 
 
 public String getId（）{
 return id; 
} 
 
 public void setId（String id）{
 this.id = id; 
} 
 
 public String getName（）{
 return name; 
} 
 
 public void setName（String name）{
 this.name = name; 
} 
 
 public String getTimestamp（）{
 return timestamp; 
} 
 
 public void setTimestamp（String timestamp）{
 this.timestamp = timestamp; 
} 
 
 public String getEmail（）{
 return email; 
} 
 
 public void setEmail（String email）{
 this.email = email; 
} 
 
 public String getModified（）{
 return modified; 
} 
 
 public void setModified（String modified）{
 this.modified = modified; 
} 
 
 public String getUrl（）{
 return url; 
} 
 
 public void setUrl（String url）{
 this.url = url; 
} 
 
 public Logo getLogo（）{
 return logo; 
} 
 
 public void setLogo（Logo logo）{
 this.logo = logo; 
} 
 
私人标志徽标; 
} 
 
 public class Logo {
 private int type; 
 
 public String getData（）{
返回数据; 
} 
 
 public void setData（String data）{
 this.data = data; 
} 
 
 public int getType（）{
返回类型; 
} 
 
 public void setType（int type）{
 this.type = type; 
} 
 
私有字符串数据; 
} 
 
 Gson gson = new Gson（）; 
 Type listType = new TypeToken< List< Customer>>（）{}。getType（）; 
列表< Customer> customer =（List< Customer>）gson.fromJson（jsonOutput，listType）; 
  

I retrieve a JSON result from an API :

[{
"oid": "axd7wtlk6xd2fbwlc5wk",
"id": "aazzzza",
"name": "aazzaa",
"logo": {
"type": 0,
"data": "iVB.............5CYII="
},
"timestamp": 1438608571013,
"email": "[e-mail]",
"modified": "test",
"url": "http://www.azzaa.net"
},
{
"oid": "quj3dzygfwygl5uxsbxk",
"name": "KZZZ",
"modified": "test",
"timestamp": 1438854099511,
"id": "kess"
},...]

but when I try to map to a customer object I get the error Expected a string but was BEGIN_OBJECT :

    response = webService.RequestGet(url, header);

    result = null;
    try {
        result = new JSONArray(response);
        Utils.LogWarning(response);
    } catch (JSONException e) {
        Utils.LogError("Could not load json response", e);
    }

    Type customerType = new TypeToken<Collection<Customer>>() {
    }.getType();
    ArrayList<Customer> alCustomers = null;
    alCustomers = new Gson().fromJson(result.toString(), customerType);

Here is my Customer class :

public class Customer implements Serializable {
    private String id = "";
    private String name = "";
    private String email = "";
    private String url = "";
    private String address = "";
    private String stamp = "";
    //private transient String logo = "";
    private long timestamp = 0L;
    private String modified = "";
    ...

}

I have been through a lot of answers regarding this problem that I have also for other types of objects, but I can't find a working solution.

解决方案

Create a modal with the values of JSON result like

    public class Customer {
        private String oid;
        private String id;
        private String name;
        private String timestamp;
        private String email;
        private String modified;
        private String url;

        public String getOid() {
            return oid;
        }

        public void setOid(String oid) {
            this.oid = oid;
        }

        public String getId() {
            return id;
        }

        public void setId(String id) {
            this.id = id;
        }

        public String getName() {
            return name;
        }

        public void setName(String name) {
            this.name = name;
        }

        public String getTimestamp() {
            return timestamp;
        }

        public void setTimestamp(String timestamp) {
            this.timestamp = timestamp;
        }

        public String getEmail() {
            return email;
        }

        public void setEmail(String email) {
            this.email = email;
        }

        public String getModified() {
            return modified;
        }

        public void setModified(String modified) {
            this.modified = modified;
        }

        public String getUrl() {
            return url;
        }

        public void setUrl(String url) {
            this.url = url;
        }

        public Logo getLogo() {
            return logo;
        }

        public void setLogo(Logo logo) {
            this.logo = logo;
        }

        private Logo logo;
    }

    public class Logo {
        private int type;

        public String getData() {
            return data;
        }

        public void setData(String data) {
            this.data = data;
        }

        public int getType() {
            return type;
        }

        public void setType(int type) {
            this.type = type;
        }

        private String data;
    }

  Gson gson = new Gson();
 Type listType = new TypeToken<List<Customer>>(){}.getType();
List<Customer> customer= (List<Customer>) gson.fromJson(jsonOutput, listType);

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