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[英]How to export data from BigQuery and store it as .csv in Google Storage
[英]Reading from BigQuery and store data to Google storage (Special Character issue)
參考: 谷歌數據流可以使用現有的虛擬機而不是臨時創建的虛擬機嗎?
代碼正在運行,但問題是當它將 BigQuery 的響應保存到谷歌存儲時,所有日語字符都已損壞。
PCollectionTuple QVCollections = rows.apply("FilterEmptyRows", ParDo.of(new FilterEmptyRowDoFn("TransactionId", "TransactionDateTime"))).apply("CreateQVFiles",ParDo.of(new TransactionToQVFilesDoFnJP())
.withOutputTags(BobShare.QVHeaders, TupleTagList.of(BobShare.QVEvents).and(BobShare.QVPayments)));
QVCollections.get(BobShare.QVEvents).apply("WriteQVEvents", TextIO.write().to(storagePath + CSV_OUTPUT_FOLDER + "events_" + timeSuffix).withoutSharding().withHeader(CSV_HEADER_EVENTS).withSuffix(".csv"));
QVCollections.get(BobShare.QVPayments).apply("WriteQVPayments", TextIO.write().to(storagePath + CSV_OUTPUT_FOLDER + "payments_" + timeSuffix).withoutSharding().withHeader(CSV_HEADER_PAYMENTS).withSuffix(".csv"));
QVCollections.get(BobShare.QVHeaders).apply("WriteQVHeaders", TextIO.write().to(storagePath + CSV_OUTPUT_FOLDER + "header_" + timeSuffix).withoutSharding().withHeader(CSV_HEADER_TRANSACTION).withSuffix(".csv"));
根據我的發現,需要使用.withCoder(StringUtf8Coder.of())
此外,這是嘗試過的(但只能在本地工作 - DirectRunner)
private static void uploadBlob(String project, String bucket, String filename, String localfile) {
String listFromCsv = readCsvFromLocalStorage(localfile);
Storage storage = StorageOptions.newBuilder().setProjectId(project).build().getService();
BlobId blobId = BlobId.of(bucket, filename);
BlobInfo blobInfo = BlobInfo.newBuilder(blobId).setContentType("application/json").setContentEncoding(UTF_8).build();
try {
storage.create(blobInfo, listFromCsv.getBytes(UTF_8));
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
}
private static String readCsvFromLocalStorage(String fileName) {
StringBuilder builder = new StringBuilder();
Path pathToFile = Paths.get(fileName);
try (BufferedReader br = Files.newBufferedReader(pathToFile,
StandardCharsets.UTF_8)) {
// read the first line from the text file
String line = br.readLine();
// loop until all lines are read
while (line != null) {
builder.append(line).append("\n");
line = br.readLine();
}
} catch (IOException ioe) {
ioe.printStackTrace();
}
return builder.toString();
}
private static void deleteLocalFile (String fileName)
{
try {
if (new File(fileName).delete()) {
System.out.println(fileName + " deleted.");
} else {
System.out.println(fileName + " could not be deleted.");
}
} catch (Exception e)
{
System.out.println(fileName + " could not be deleted.");
e.printStackTrace();
}
}
這就是數據的樣子(已損壞): JAPANESE CHRACTERS
有什么建議? 任何 .... (((
你需要更換
BufferedReader br = Files.newBufferedReader(pathToFile, StandardCharsets.UTF_8))
經過
BufferedReader br = Files.newBufferedReader(pathToFile, Charset.forName("UTF-8"))
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