java - 尝试使用Java从Web应用程序在Data Lake中创建文件

以下是在datalake中创建文件的代码段。 ADLException抛出在client.createfile行。经许可检查，用户已读取，写入和执行。有人可以帮忙解决这个问题吗？

尝试{

                     OutputStream stream = client.createFile("/Raw/TEST/"+FuFileName, IfExists.OVERWRITE);

                    PrintStream out = new PrintStream(stream);
                    for (int i = 1; i <= 10; i++) {
                        out.println("This is line #" + i);
                        out.format("This is the same line (%d), but using formatted output. %n", i);
                    }
                    out.close();
                } catch (ADLException ex) {
                    printExceptionDetails(ex);
                } catch (Exception ex) {
                    System.out.format(" Exception: %s%n Message: %s%n", ex.getClass().getName(), ex.getMessage());
                }

最佳答案

如果要使用Java在Azure Data Lake Gen1中创建文件，可以使用service-to-service authentication。详细步骤如下。

Create an Active Directory web application


Assign the Azure AD application to the Azure Data Lake Storage Gen1 account file or folder


码

 private static String clientId = "FILL-IN-HERE";
 private static String authTokenEndpoint = "FILL-IN-HERE";
 private static String clientKey = "FILL-IN-HERE";

 AccessTokenProvider provider = new ClientCredsTokenProvider(authTokenEndpoint, clientId, clientKey);
private static String accountFQDN = "FILL-IN-HERE";  // full account FQDN, not just the account name
ADLStoreClient client = ADLStoreClient.createClient(accountFQDN, provider);

try {
String filename = "/a/b/c.txt";
OutputStream stream = client.createFile(filename, IfExists.OVERWRITE  );
PrintStream out = new PrintStream(stream);
for (int i = 1; i <= 10; i++) {
    out.println("This is line #" + i);
    out.format("This is the same line (%d), but using formatted output. %n", i);
}
out.close();
System.out.println("File created.");

}catch(Exception ex){
 System.out.format(" Exception: %s%n Message: %s%n", ex.getClass().getName(), ex.getMessage());
}

有关更多详细信息，请参阅https://docs.microsoft.com/en-us/azure/data-lake-store/data-lake-store-get-started-java-sdk。

关于java - 尝试使用Java从Web应用程序在Data Lake中创建文件，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/58657968/