okhttp3 post请求_okhttp3 post json

1、基础的POST

@Test
public void whenSendPostRequest_thenCorrect() 
  throws IOException {
    RequestBody formBody = new FormBody.Builder()
      .add("username", "test")
      .add("password", "test")
      .build();
 
    Request request = new Request.Builder()
      .url(BASE_URL + "/users")
      .post(formBody)
      .build();
 
    Call call = client.newCall(request);
    Response response = call.execute();
    
    assertThat(response.code(), equalTo(200));
}

2、POST 验证

如果想要验证请求，可以使用Credentials.basic构造器将凭证添加到header中

@Test
public void whenSendPostRequestWithAuthorization_thenCorrect() 
  throws IOException {
    String postBody = "test post";
    
    Request request = new Request.Builder()
      .url(URL_SECURED_BY_BASIC_AUTHENTICATION)
      .addHeader("Authorization", Credentials.basic("username", "password"))
      .post(RequestBody.create(
        MediaType.parse("text/x-markdown), postBody))
      .build();
    Call call = client.newCall(request);
    Response response = call.execute();
    assertThat(response.code(), equalTo(200));
}

3. POST带json参数

为了在请求正文中发送 JSON，需要设置媒体类型为application/json。可以使用RequestBody.create builder来完成：

@Test
public void whenPostJson_thenCorrect() throws IOException {
    String json = "{\"id\":1,\"name\":\"John\"}";
 
    RequestBody body = RequestBody.create(
      MediaType.parse("application/json"), json);
 
      //MediaType.parse("application/json; charset=utf-16"), json);
 
    Request request = new Request.Builder()
      .url(BASE_URL + "/users/detail")
      .post(body)
      .build();
 
    Call call = client.newCall(request);
    Response response = call.execute();
 
    assertThat(response.code(), equalTo(200));
}

4、Multipart POST 请求

需要将RequestBody构建为MultipartBody用于post 例子中的file、username和password：

@Test
public void whenSendMultipartRequest_thenCorrect() 
  throws IOException {	
    RequestBody requestBody = new MultipartBody.Builder()
      .setType(MultipartBody.FORM)
      .addFormDataPart("username", "test")
      .addFormDataPart("password", "test")
      .addFormDataPart("file", "file.txt",
        RequestBody.create(MediaType.parse("application/octet-stream"), 
          new File("test/resources/test.txt")))
      .build();
 
    Request request = new Request.Builder()
      .url(BASE_URL + "/users/multipart")
      .post(requestBody)
      .build();
 
    Call call = client.newCall(request);
    Response response = call.execute();
 
    assertThat(response.code(), equalTo(200));
}