使用Rest API通過HTTP將文件從Java後端上載到遠程服務器的問題。

Question

我的文件駐留在我的機器上的某個位置，如C：//users//abc.txt，我想編寫一個Java程序來使用REST API通過HTTP傳輸此文件。我用MockHttpServelet請求創建的要求，但不知何故，我無法將文件

Answer 1

使用HttpClient轉移：

String url = "http://localhost:8080/upload"; // Replace with your target 'REST API' url 
String filePath = "C://users//abc.txt"; 

CloseableHttpClient httpClient = HttpClients.createDefault(); 
try { 
    HttpPost httpPost = new HttpPost(url); 
    FileEntity entity = new FileEntity(new File(filePath), ContentType.TEXT_PLAIN); 
    httpPost.setEntity(entity); 

    HttpResponse httpResponse = httpClient.execute(httpPost); 
    System.out.println(httpResponse.getStatusLine().getStatusCode()); // Check HTTP code 
} finally { 
    httpClient.close(); 
} 

身份驗證：

String url = "http://localhost:8080/upload"; // Replace with your target 'REST API' url 
String filePath = "C://users//abc.txt"; 
String username = "username"; // Replace with your username 
String password = "password"; // Replace with your password 

RequestConfig requestConfig = 
    RequestConfig.custom(). 
    setAuthenticationEnable(true). 
    build(); 

CredentialsProvider credentialsProvider = new BasicCredentialsProvider(); 
credentialsProvider.setCredentials(
    AuthScope.ANY, 
    new UsernamePasswordCredential(username, password)); 

CloseableHttpClient httpClient = 
    HttpClients.custom(). 
    setDefaultRequestConfig(requestConfig). 
    setDefaultCredentialsProvider(credentialsProvider). 
    build(); 
try { 
    HttpPost httpPost = new HttpPost(url); 
    FileEntity entity = new FileEntity(new File(filePath), ContentType.TEXT_PLAIN); 
    httpPost.setEntity(entity); 

    HttpResponse httpResponse = httpClient.execute(httpPost); 
    System.out.println(httpResponse.getStatusLine().getStatusCode()); // Check HTTP code 
} finally { 
    httpClient.close(); 
} 

Answer 2

String location="C:\\Usersabc.img"; 
Path path = Paths.get(location); 
String name=location.substring(location.lastIndexOf("\\")+1); 
MultipartEntity multipart= new MultipartEntity(HttpMultipartMode.BROWSER_COMPATIBLE);     
    try { 
    multipart.addPart("image", new ByteArrayBody(Files.readAllBytes(path), ContentType.APPLICATION_OCTET_STREAM.getMimeType(),name));     
     } 
     catch (IOException ex) { 
        // TODO Auto-generated catch block 
        ex.printStackTrace(); 
       }