我有一个 S3 存储桶 xxx。我编写了一个 lambda 函数来访问来自 s3 存储桶的数据并将这些详细信息写入 RDS PostgreSQL 实例。我可以用我的代码做到这一点。我在 lambda 函数中添加了一个触发器，用于在文件落在 s3 上时调用它。
但从我的代码中，我只能读取名为“sampleData.csv”的文件。考虑下面给出的我的代码
public class LambdaFunctionHandler implements RequestHandler<S3Event, String> {
private AmazonS3 s3 = AmazonS3ClientBuilder.standard().build();
public LambdaFunctionHandler() {}
// Test purpose only.
LambdaFunctionHandler(AmazonS3 s3) {
this.s3 = s3;
}
@Override
public String handleRequest(S3Event event, Context context) {
context.getLogger().log("Received event: " + event);
String bucket = "xxx";
String key = "SampleData.csv";
System.out.println(key);
try {
S3Object response = s3.getObject(new GetObjectRequest(bucket, key));
String contentType = response.getObjectMetadata().getContentType();
context.getLogger().log("CONTENT TYPE: " + contentType);
// Read the source file as text
AmazonS3 s3Client = new AmazonS3Client();
String body = s3Client.getObjectAsString(bucket, key);
System.out.println("Body: " + body);
System.out.println();
System.out.println("Reading as stream.....");
System.out.println();
BufferedReader br = new BufferedReader(new InputStreamReader(response.getObjectContent()));
// just saving the excel sheet data to the DataBase
String csvOutput;
try {
Class.forName("org.postgresql.Driver");
Connection con = DriverManager.getConnection("jdbc:postgresql://ENDPOINT:5432/DBNAME","USER", "PASSWORD");
System.out.println("Connected");
// Checking EOF
while ((csvOutput = br.readLine()) != null) {
String[] str = csvOutput.split(",");
String name = str[1];
String query = "insert into schema.tablename(name) values('"+name+"')";
Statement statement = con.createStatement();
statement.executeUpdate(query);
}
System.out.println("Inserted Successfully!!!");
}catch (Exception ase) {
context.getLogger().log(String.format(
"Error getting object %s from bucket %s. Make sure they exist and"
+ " your bucket is in the same region as this function.", key, bucket));
// throw ase;
}
return contentType;
} catch (Exception e) {
e.printStackTrace();
context.getLogger().log(String.format(
"Error getting object %s from bucket %s. Make sure they exist and"
+ " your bucket is in the same region as this function.", key, bucket));
throw e;
}
}
从我的代码中你可以看到我提到了 key="SampleData.csv"; 有没有办法在不指定特定文件名的情况下获取存储桶中的密钥？