Question

我是使用Retrofit和Gson的新手，当我尝试使用POST方法向REST API发送请求时，我遇到如下错误。

com.google.gson.JsonSyntaxException：java.lang.IllegalStateException：预期为BEGIN_ARRAY，但在第4行第14行路径为$ .data
时为BEGIN_OBJECT

以下是我的java代码。

private void sendRequest(CheckEmail checkEmail){
    ApiInterface apiService =  ApiClient.getClient().create(ApiInterface.class);

    Call<CheckEmail> call = apiService.getEmailStatus(checkEmail);

    call.enqueue(new Callback<CheckEmail>() {
        @Override
        public void onResponse(Call<CheckEmail> call, Response<CheckEmail> response) {

            GsonBuilder gsonBuilder = new GsonBuilder();
            Gson gson = gsonBuilder.create();

            CheckEmail checkEmail = gson.fromJson(String.valueOf(response.body().getData()), CheckEmail.class);
            Toast.makeText(CheckEmailPage.this, "Successfull "+checkEmail, Toast.LENGTH_SHORT).show();
        }

        @Override
        public void onFailure(Call<CheckEmail> call, Throwable t) {
            Toast.makeText(CheckEmailPage.this, "Something went wrong!", Toast.LENGTH_SHORT).show();
            Log.e("Error Retrofit : ", String.valueOf(t));

        }
    });

}

以下是我的模特

public class CheckEmail {

private int code;
private String message;
private String[] data;

public CheckEmail(String message) {
    this.message = message;
}

public int getCode() {
    return code;
}

public void setCode(int code) {
    this.code = code;
}

public String getMessage() {
    return message;
}

public void setMessage(String message) {
    this.message = message;
}

public String[] getData() {
    return data;
}

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

这是我的类初始化URL和改造构建器

public class ApiClient {

public static final String BASE_URL = "https://f49d9d29-8471-4126-95b0-1ec3d18eda94.mock.pstmn.io/v1/";
private static Retrofit retrofit;

public static Retrofit getClient(){

    HttpLoggingInterceptor logging = new HttpLoggingInterceptor();
    logging.setLevel(HttpLoggingInterceptor.Level.BODY);
    OkHttpClient.Builder httpClient = new OkHttpClient.Builder();
    httpClient.addInterceptor(logging);

    if(retrofit == null){
        retrofit = new Retrofit.Builder()
                .baseUrl(BASE_URL)
                .addConverterFactory(GsonConverterFactory.create())
                .build();
    }
    return retrofit;
}

以下是ApiInterface

public interface ApiInterface {
@POST("users/check_status")
Call<CheckEmail> getEmailStatus(@Body CheckEmail email);
}

这是我从邮递员那里得到的json回复

{
"code": 1000,
"message": "OK",
"data": {
    "id": "1",
    "email": "test.test@gmail.com",
    "status": "1",
    "name": "testing",
    "category": "2"
}

}

我的代码有什么问题？提前谢谢你

Answer 1

已经解析了响应（即响应＆lt;＆gt;响应）。无需使用gson builder再次解析它。只需从响应中获取数据，如下所示：

String data[] = response.body().getData();

此处无需使用gson builder：

 GsonBuilder gsonBuilder = new GsonBuilder(); // remove this code
            Gson gson = gsonBuilder.create();// remove this code

CheckEmail checkEmail = gson.fromJson(String.valueOf(response.body().getData()), CheckEmail.class);// remove this code

Answer 2

checkEmail类中的数据不是字符串数组。

使用以下类替换数据。

public class Data {

@SerializedName("id")
@Expose
private String id;
@SerializedName("email")
@Expose
private String email;
@SerializedName("status")
@Expose
private String status;
@SerializedName("name")
@Expose
private String name;
@SerializedName("category")
@Expose
private String category;

public String getId() {
return id;
}

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

public String getEmail() {
return email;
}

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

public String getStatus() {
return status;
}

public void setStatus(String status) {
this.status = status;
}

public String getName() {
return name;
}

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

public String getCategory() {
return category;
}

public void setCategory(String category) {
this.category = category;
}

}

你的checkEmail类应该类似于以下内容（String []被Data类替换）

public class CheckEmail{

@SerializedName("code")
@Expose
private Integer code;
@SerializedName("message")
@Expose
private String message;
@SerializedName("data")
@Expose
private Data data;

public Integer getCode() {
return code;
}

public void setCode(Integer code) {
this.code = code;
}

public String getMessage() {
return message;
}

public void setMessage(String message) {
this.message = message;
}

public Data getData() {
return data;
}

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

}

Gson和Retrofit出错：预计BEGIN_ARRAY但是BEGIN_OBJECT

2 个答案: