Amazon ec2 如何使用API获取在AmazonEC2帐户下运行的服务器实例数

如何使用API获取在我的Amazon EC2帐户下运行的服务器实例数？

入门页面在页面的中间有一个示例

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下载java SDK并查看aws java SDK/samples/awsconnelp/awsconnelp.java

以下是一个示例，如aws.NET SDK附带的示例所示：

static void Main(string[] args)
{
    NameValueCollection appConfig = ConfigurationManager.AppSettings;

    AmazonEC2 ec2 = AWSClientFactory.CreateAmazonEC2Client(
        appConfig["AWSAccessKey"],
        appConfig["AWSSecretKey"]
        );

    DescribeInstancesRequest request = new DescribeInstancesRequest();

    try
    {
        DescribeInstancesResponse ec2Response = ec2.DescribeInstances(request);
        int numInstances = 0;
        numInstances = ec2Response.DescribeInstancesResult.Reservation.Count;
        Console.WriteLine("You have " + numInstances + " Amazon EC2 instance(s) running.");
    }
    catch (AmazonEC2Exception ex)
    {
        if (ex.ErrorCode.Equals("OptInRequired"))
        {
            Console.WriteLine("You are not signed for Amazon EC2.");
            Console.WriteLine("You can sign up at http://aws.amazon.com/ec2.");
        }
        else
        {
            Console.WriteLine("Caught Exception: " + ex.Message);
            Console.WriteLine("Response Status Code: " + ex.StatusCode);
            Console.WriteLine("Error Code: " + ex.ErrorCode);
            Console.WriteLine("Error Type: " + ex.ErrorType);
            Console.WriteLine("Request ID: " + ex.RequestId);
            Console.WriteLine("XML: " + ex.XML);
        }
    }
    Console.WriteLine();
    Console.WriteLine("Press any key to exit...");
    Console.ReadKey(true);
}