当我将文本文件下载到本地驱动器时，尝试将多行插入文本文件时遇到问题。我怎样才能做到这一点？
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();
}
}
}