Retrofit2 POST 方法获取代码 400 但适用于 Restlet 客户端答案

【问题标题】：Retrofit2 POST method gets code 400 but works with Restlet ClientRetrofit2 POST 方法获取代码 400 但适用于 Restlet 客户端
【发布时间】：2020-01-09 01:47:54
【问题描述】：

我正在使用 Retrofit2。我想从我的移动设备向我的 Web 服务发布一些数据，但总是得到代码 400 响应。当我尝试从 Restlet 客户端发送 POST 请求时，我得到了正常响应 (chrome-extension://aejoelaoggembcahagimdiliamlcdmfm/restlet_client.html#requests)。

我得到一些信息，问题可能出在服务器证书中，所以我实现了 OkHttpClient，但我仍然得到相同的结果。如果我尝试 POST 到 jsonPlaceHolder，我会得到正常结果 (https://jsonplaceholder.typicode.com/posts)

API 接口：

public interface JsonPlaceHolderApi {

@POST("hws/hibisWsTemplate/api/v1/order/posts")
Call<Post> createPost(@Body Post post);
}

我的帖子课程：

public class Post {
private String vodilni_slog;
private String IBAN_placnka;
private String polog;
...

public Post(String vodilni_slog, String IBAN_placnka, String polog) {
    this.vodilni_slog = vodilni_slog;
    this.IBAN_placnka = IBAN_placnka;
    this.polog = polog;
    ...
}

//getters and setters
 ...

}

主要活动（仅我发送 POST 请求的部分）：

...

send_btn.setOnClickListener(new View.OnClickListener(){
        @Override
        public void onClick(View v) {

       //RETROFIT
        OkHttpClient okHttpClient = getUnsafeOkHttpClient();

        Retrofit retrofit = new Retrofit.Builder()
                    .baseUrl("https://xxxxxx.x-xx.xx/") //url
                    .client(okHttpClient)
                    .addConverterFactory(GsonConverterFactory.create())
                    .build();

            jsonPlaceHolderApi = retrofit.create(JsonPlaceHolderApi.class);


         Post post = new Post("test", "test", "test", "test");

         Call<Post> call = jsonPlaceHolderApi.createPost(post);

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

                        if (!response.isSuccessful()) {
                            MainActivity.content.setText("Code: " + response.code());
                            return;
                        }
                        Post postResponse = response.body();

                        String x = "";
                        x += "Code: " + response.code() + "\n";
                        x += "Naziv: " + postResponse.getIme_prejemnika() + "\n";
                        x += "IBAN: " + postResponse.getIBAN_prejemnika() + "\n";
                        x += "Sklic: " + postResponse.getReferenca_prejemnika() + "\n";

                        MainActivity.content.setText(x); 
                    }

                    @Override
                    public void onFailure(Call<Post> call, Throwable t) {
                        MainActivity.content.setText(t.getMessage());
                    }
                });
            }
    });

OKHTTP 客户端：

private static OkHttpClient getUnsafeOkHttpClient() {
    try {           
        final TrustManager[] trustAllCerts = new TrustManager[] {
                new X509TrustManager() {
                    @Override
                    public void checkClientTrusted(java.security.cert.X509Certificate[] chain, String authType) throws CertificateException {
                    }

                    @Override
                    public void checkServerTrusted(java.security.cert.X509Certificate[] chain, String authType) throws CertificateException {
                    }

                    @Override
                    public java.security.cert.X509Certificate[] getAcceptedIssuers() {
                        return new java.security.cert.X509Certificate[]{};
                    }
                }
        };

        final SSLContext sslContext = SSLContext.getInstance("SSL");
        sslContext.init(null, trustAllCerts, new java.security.SecureRandom());

        final SSLSocketFactory sslSocketFactory = sslContext.getSocketFactory();

        OkHttpClient.Builder builder = new OkHttpClient.Builder();
        builder.sslSocketFactory(sslSocketFactory, (X509TrustManager)trustAllCerts[0]);
        builder.hostnameVerifier(new HostnameVerifier() {
            @Override
            public boolean verify(String hostname, SSLSession session) {
                return true;
            }
        });

        OkHttpClient okHttpClient = builder.build();
        return okHttpClient;
    } catch (Exception e) {
        throw new RuntimeException(e);
    }
}

我希望代码 201 带有正文： { “vodilni_slog”：“字符串”， "polog": "字符串", “dvig”：“字符串”， ... {

但我得到代码 400...

【问题讨论】：

标签： java json post retrofit2 okhttp

【解决方案1】：

我发现我收到了错误 400，因为 IBAN_placnka 应该是 iban_placnka，所以如果您收到错误 400，请检查您的拼写并使用此行查看您实际获得的 json 格式：

Log.e("x" , "Request is" + new Gson().toJson(post).toString() );

【讨论】：