File 黑客使用RESTAPI通过HTTP将文件从Java后端上传到远程服务器。

我的文件位于我的计算机上的某个位置，比如C://users//abc.txt，我想编写一个java程序，使用RESTAPI通过HTTP传输该文件。我使用MockHttpServelet Request创建请求，但不知何故我无法传输文件

使用：

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();
}

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();
}

具有身份验证：

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();
}

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();
}

---

不知道RESTAPI，但我已经在服务器上上传了文件，MySql作为后端。不确定您使用的是什么，是MongoDB吗？Milind，独立的Java应用程序正在后端运行。我有一个使用RESTAPI将文件从我的目录传输到某个服务器的函数。服务器接受RESTAPI重新请求。我不想使用任何像scp这样的协议进行文件传输。服务器将仅通过Rest API接受请求，但必须有一些数据库来存储您的文件？/File存储的是我机器上的某个目录，而不是数据库上的某个目录。现在，文件位置是经过加密的，不存储在数据库中（比如C://Users/abc.txt），谢谢Greg。您知道需要在哪里指定会话/用户凭据以便服务器允许访问它吗？身份验证使用是另一个问题。使用HttpClients.custom（）.setDefaultRequestConfig（requestConfig）.setDefaultCredentialsProvider（credentialsProvider）。它不会影响性能吗？我的意思是，当打开文件进行传输时，JVM会将文件加载到内存中。如果是大型的，我相信会有性能问题。你知道如何避免吗？你可以自己检查以确保文件不会加载到内存中。