我正在AWS中做一个小POC。我尝试从S3存储桶读取csv文件并显示在CloudWatch日志文件中。一切都很顺利,但访问文件时得到java.io.FileNotFoundException
编码
public class LambdaFunctionHandler implements RequestHandler<S3Event, Report> {
Region AWS_REGION = Region.getRegion(Regions.US_EAST_1);
public Report handleRequest(S3Event s3event, Context context) {
long startTime = System.currentTimeMillis();
Report statusReport = new Report();
LambdaLogger logger = context.getLogger();
logger.log("Lambda Function Started");
logger.log("I am inside lambda function");
Helper helper = new Helper();
try {
logger.log("I am inside lambda function2");
S3EventNotificationRecord record = s3event.getRecords().get(0);
logger.log("I am inside lambda function3");
String srcBucket = record.getS3().getBucket().getName();
logger.log("I am inside lambda function4");
// Object key may have spaces or unicode non-ASCII characters.
String srcKey = record.getS3().getObject().getKey().replace('+', ' ');
logger.log("I am inside lambda function5");
srcKey = URLDecoder.decode(srcKey, "UTF-8");
logger.log("I am inside lambda function6");
AmazonS3 s3Client = new AmazonS3Client();
logger.log("I am inside lambda function7");
S3Object s3Object = s3Client.getObject(new GetObjectRequest(srcBucket, srcKey));
logger.log("I am inside lambda function8");
statusReport.setFileSize(s3Object.getObjectMetadata().getContentLength());
logger.log("I am inside lambda function9");
logger.log("S3 Event Received: " + srcBucket + "/" + srcKey);
logger.log("I am inside lambda function10");
File file = new File(srcBucket+"/"+srcKey);
try {
Scanner readData =new Scanner(file);
while(readData.hasNext()) {
String data = readData.next();
logger.log("I am inside lambda function data ;;got it");
//System.out.println("data"+data);
}
readData.close();
}catch(FileNotFoundException e){
e.printStackTrace();
}
CloudWatch日志文件输出
CloudWatch日志错误
我在lambda函数中
我在lambda function2
里面我在lambda function3
里面我在lambda function4
里面我在lambda function5
里面我在lambda function6里面
我在lambda function7
里面我在lambda function8
里面我在lambda function9
里面收到S3事件:readfilefromcsvfile / def_nhtsa_crash_test.csv
我在lambda function10
里面java.io.FileNotFoundException:
readfilefromcsvfile / def_nhtsa_crash_test.csv(没有这样的文件或目录) java.io.FileNotFoundException:readfilefromcsvfile / def_nhtsa_crash_test.csv(没有这样的文件或目录) 在java.io.FileInputStream.open0(本机方法)
如果我们查看日志输出,它会告诉我没有这样的文件,但我把它保存在S3存储桶中。谁能告诉我如何在java中访问S3文件?或访问S3存储文件时应该给出的路径名是什么?
答案 0 :(得分:2)
此处无需创建File实例。您可以简单地处理S3 InputStream。
S3Object s3Object = s3Client.getObject(new GetObjectRequest(srcBucket, srcKey));
....
Scanner scanner = new Scanner(s3Object.getObjectContent());
while (scanner.hasNext()) {
System.out.println(scanner.next());
}