读取 Swift Message Prowide (WIFE) 后关闭 fileInputStream

Question

我正在阅读 SWIFT 报文 (MT103) 并将它们加载到数据库中。之后我需要删除该文件以避免在接下来的循环中进行第二次解析。但是它在解析消息后不会自动关闭InputStream。如何关闭 InputStream 以便成功归档文件？当我尝试使用 FileUtils 归档文件时出现错误：Failed to delete original file '\home\swift\991904100973103097.out' after copy to '\home\Outswift\991904100973103097.out'

public static void loadMessageInformationToDatabase(String sourceDir, File archiveDir) {
    log.debug("Listening to Incoming SWIFT Messages");
    File[] files = new File(sourceDir).listFiles();
    log.debug("Found " + files.length + " SWIFT Files for Processing");
    if (files.length > 0) {
        for (int i = 0; i < files.length; i++) {
            log.debug("Attepting to process file " + files[i].getAbsolutePath());
            int swiftSerialNumner = 0;
            try {
                MtSwiftMessage msg = MtSwiftMessage.parse(files[i]);
                String mtNumber = msg.getMessageType();
                String receiver = msg.getReceiver();
                String sender = msg.getSender();
                byte[] message = IOUtils.toByteArray(new FileInputStream(files[i]));
                String pde = msg.getPde();
                String instructedCurrency = "";
                double instructedAmount = 0.00;
                String inOutIndicator = "";
                if (msg.isIncoming()) {
                    inOutIndicator = "I";
                } else if (msg.isOutgoing()) {
                    inOutIndicator = "O";
                }
                String senderReference = "";
                if (mtNumber.equalsIgnoreCase("103")) {
                    MT103 model = MT103.parse(files[i]);
                    List<Field> fields = model.getFields();
                    for (Field field : fields) {
                        if (field.getName().equalsIgnoreCase("20")) {
                            senderReference = field.getValue();
                        }
                        if (field.getName().equalsIgnoreCase("33B")) {
                            instructedCurrency = field.getValue().substring(0, 3);
                            instructedAmount = Double.parseDouble(field.getValue().substring(3).replace(",", "."));
                        }
                    }
                }
                swiftSerialNumner = Swift.addSwiftMessage(mtNumber, receiver, message, "N", null, null, null, null, "S", "SYSTEM", new Date(), "Y", new Date(), "SYSTEM", new Date(), "SYSTEM", null, inOutIndicator, null, null, null, pde, "Y", receiver, sender, null, senderReference, null, instructedAmount, instructedCurrency, null, null, null, null, null, "N", "Y", "N", Gct.getBankId(), "Y");
                if (swiftSerialNumner > 0) {
                    log.debug("File " + files[i].getAbsolutePath() + " Parsed Successfully");
                    if (Swift.isDuplicateReference(senderReference)) {
                        Swift.markSwiftMessageAsDuplicate(swiftSerialNumner);
                        log.warn("SWIFT Serial " + swiftSerialNumner + " Marked as Duplicate");
                    }
                } else {
                    log.error("Error in Parsing File Name " + files[i].getAbsolutePath());
                }

                FileUtils.moveFileToDirectory(files[i], archiveDir, true);//Error comes on this line
                log.debug("SWIFT File " + files[i] + " archived in " + archiveDir.getAbsolutePath());
            } catch (IOException | NumberFormatException asd) {
                log.error("SWIFT Processing Error: " + asd.getMessage());
            }
        }
    }
}

Answer 1

试试这个：

FileInputStream fis = new FileInputStream(files[i])
byte[] message = IOUtils.toByteArray(fis);

并添加finally子句并关闭fis：

} catch (IOException | NumberFormatException asd) {
    log.error("SWIFT Processing Error: " + asd.getMessage());
} finally {
    fis.close()
}