用Json数据改进POST方法得到错误代码400：错误请求

Question

我想在Retrofit中使用JSON数据调用POST方法（Magento REST API）（将JSON提供为JsonObject）。为此，我打电话给邮递员，并为我工作。

我已经完成了android部分如下，

API接口

public interface APIService {

@POST("seq/restapi/checkpassword")
@Headers({
        "Content-Type: application/json;charset=utf-8",
        "Accept: application/json;charset=utf-8",
        "Cache-Control: max-age=640000"
})
Call<Post> savePost(
        @Body JSONObject jsonObject
);}

APIUtility类为

public class ApiUtils {

private ApiUtils() {
}

public static final String BASE_URL = "http://xx.xxxx.xxx.xxx/api/rest/";
public static APIService getAPIService() {

    return RetrofitClient.getClient(BASE_URL).create(APIService.class);
}

}

RetrofitClient类为

private static Retrofit retrofit = null;

public static Retrofit getClient(String baseUrl) {
    if (retrofit==null) {
        retrofit = new Retrofit.Builder()
                .baseUrl(baseUrl)
                .addConverterFactory(GsonConverterFactory.create())
                .build();
    }
    return retrofit;
}

最后，调用该函数如下

public void sendPost(JSONObject jsonObject) {

    Log.e("TEST", "******************************************  jsonObject" + jsonObject);
    mAPIService.savePost(jsonObject).enqueue(new Callback<Post>() {
        @Override
        public void onResponse(Call<Post> call, Response<Post> response) {
            if (response.isSuccessful()) {

            }
        }

        @Override
        public void onFailure(Call<Post> call, Throwable t) {

        }
    });
}

CallRetrofit API与POST方法一起使用。

Answer 1

将代码更改为此类代码，GsonConverterFactory将User对象转换为json本身。

public interface APIService {
    @POST("seq/restapi/checkpassword")
    @Headers({
        "Content-Type: application/json;charset=utf-8",
        "Accept: application/json;charset=utf-8",
        "Cache-Control: max-age=640000"
    })
    Call<Post> savePost(@Body User user);
}

这是用户类：

public class User {
    private String username;
    private String password;

    public String getUsername() {
        return username;
    }

    public void setUsername(String username) {
        this.username = username;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }
}

Answer 2

我认为你为所有调用设置的GsonConverterFactory将你的JSONObject转换为json。这就是为什么你的电话的身体看起来可能与你想象的完全不同。这是gson.toJson(new JSONObject())的结果：

{ "nameValuePairs": {} }

尝试将您发送的对象更改为：

public class Credentials {
    private String username;
    private String password;

    ...
}

然后更新你的电话

public interface APIService {

@POST("seq/restapi/checkpassword")
@Headers({
    "Content-Type: application/json;charset=utf-8",
    "Accept: application/json;charset=utf-8",
    "Cache-Control: max-age=640000"
})
Call<Post> savePost(
    @Body Credentials credentials
);}

为确保您的通话正确，请致电

Gson gson = new Gson();
gson.toJson(new Credentials("test_username", "test_password");

Answer 3

试试这个

1.API interface.Java

public interface APIInterface {

    /*Login*/
    @POST("users/login")
    Call<UserResponse> savePost(@HeaderMap Map<String, String> header, @Body UserModel loginRequest);

}

2.API client.Java

public class ApiClient {

    public static final String BASE_URL = "baseurl";
    private static Retrofit retrofit = null;


    public static Retrofit getClient() {
        if (retrofit == null) {
            HttpLoggingInterceptor interceptor = new HttpLoggingInterceptor();
            interceptor.setLevel(HttpLoggingInterceptor.Level.BODY);
            OkHttpClient client = new OkHttpClient.Builder().addInterceptor(interceptor)
                    .connectTimeout(30, TimeUnit.MINUTES)
                    .readTimeout(30, TimeUnit.MINUTES)
                    .build();

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

}

3. API调用

   public void sendPost(JSONObject jsonObject) {
   
       LoginRequestModel loginRequest = new LoginRequestModel(userName, userPassword);
   
       Map<String, String> header = new HashMap<>();
       header.put("Content-Type", "application/json");
   
       APIInterface appInterface = ApiClient.getClient().create(APIInterface.class);
       System.out.println("Final" + new Gson().toJson(loginRequest));
   
       Call<LoginResponseModel> call = appInterface.savePost(header, loginRequest);
   
       call.enqueue(new Callback<LoginResponseModel>() {
           @Override
           public void onResponse(Call<LoginResponseModel> call, Response<UserModel> response) {
               hideProgressDialog();
   
               if (response.body()!=null) {
   
               } else {
                   Toast.makeText(mContext, "Invalid credentials", Toast.LENGTH_SHORT).show();
               }
   
           }
   
           @Override
           public void onFailure(Call<LoginResponseModel> call, Throwable t) {
               t.printStackTrace();
           }
       });

   }
4. Gradle文件中的依赖项

   compile 'com.squareup.retrofit2:retrofit:2.3.0'
   compile 'com.google.code.gson:gson:2.8.2'
   compile 'com.squareup.retrofit2:converter-gson:2.3.0'
   compile 'com.squareup.okhttp3:okhttp:3.9.0'
   compile 'com.squareup.okhttp3:logging-interceptor:3.9.0'

5.用户模型

public class UserModel {

    @SerializedName("usename")
    @Expose
    String userEmail;

    @SerializedName("password")
    @Expose
    String userPassword;

    public UserModel(String userEmail, String userPassword) {
        this.userEmail = userEmail;
        this.userPassword = userPassword;
    }


}