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ローカルドライブにダウンロードするときに、テキストファイルに複数の行を挿入しようとすると問題が発生します。どうやってやるの？

public class downloads3 {
    private static String bucketName = "testfyp";
    private static String key        = "pig.txt";
    private static String test2;

    public static void main(String[] args) throws IOException {
        AmazonS3 s3Client = new AmazonS3Client(new PropertiesCredentials(
                downloads3.class.getResourceAsStream(
                        "AwsCredentials.properties")));
        try {
            System.out.println("Downloading an object");
            S3Object s3object = s3Client.getObject(new GetObjectRequest(bucketName, key));
            System.out.println("Content-Type: "  + 
                    s3object.getObjectMetadata().getContentType());
            displayTextInputStream(s3object.getObjectContent());

           // Get a range of bytes from an object.

            GetObjectRequest rangeObjectRequest = new GetObjectRequest(
                    bucketName, key);
            rangeObjectRequest.setRange(0, 10);
            S3Object objectPortion = s3Client.getObject(rangeObjectRequest);

            System.out.println("Printing bytes retrieved.");
            displayTextInputStream(objectPortion.getObjectContent());

            FileWriter fw = new FileWriter("C:/Users/L31305/Desktop/" + key + ".txt");
            // String test =
            // String test3 = s3object.getObjectContent();
            fw.write(test2);
            fw.close();
        } catch (AmazonServiceException ase) {
            ase.printStackTrace();
            System.out.println("Caught an AmazonServiceException, which" +
                    " means your request made it " +
                    "to Amazon S3, but was rejected with an error response" +
                    " for some reason.");
            System.out.println("Error Message:    " + ase.getMessage());
            System.out.println("HTTP Status Code: " + ase.getStatusCode());
            System.out.println("AWS Error Code:   " + ase.getErrorCode());
            System.out.println("Error Type:       " + ase.getErrorType());
            System.out.println("Request ID:       " + ase.getRequestId());
        } catch (AmazonClientException ace) {
            System.out.println("Caught an AmazonClientException, which means"+
                    " the client encountered " +
                    "an internal error while trying to " +
                    "communicate with S3, " +
                    "such as not being able to access the network.");
            System.out.println("Error Message: " + ace.getMessage());
        }
    }

    private static void displayTextInputStream(InputStream input) throws IOException {
        // Read one text line at a time and display.

        BufferedReader reader = new BufferedReader(new 
                InputStreamReader(input));

        Scanner sc = new Scanner(System.in);
        String line;

        do{
            line = reader.readLine();
            test2 = line;

            System.out.println("    " + line);
        }
        while (reader.readLine() != null); {
            test2 += line;
            System.out.println();
        }
    }
}
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1 に答える 1

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do / whileループがあり、ループするたびに行が失われます。また、2番目のブロックはwhile内ではなく、whileループの後にあります。あなたの奇妙なフォーマットのために、それはあなたには明白ではないかもしれません。

于 2012-07-23T02:28:35.623 に答える