如何使用Java将调用存储库中的每一行数据保存在txt文件中

Question

@Autowired
PilahRepository repoPilah;

@Autowired
PilahService pilahService;

@Autowired
private SecurityContext securityContext;

@RequestMapping(value = "/pilahFile", method = RequestMethod.POST)
public PilahFile pilahFIle() {
    String nameFile[] = pilahService.findFileName();
    Scanner sc;
    String destination;
    BigInteger userExecutor = securityContext.userId();
    PilahFile pilah = new PilahFile();
    try {
        File source = new File("D:/Kerja/txt/");
        destination = "D:/Kerja/hasil/";
        BufferedWriter writeFile;
        Date now;
        String prev = null, curr = null, next = null;
        for (File file : source.listFiles()) {
            sc = new Scanner(file);
            now = DateUtils.now();
            while (sc.hasNextLine()) {
                prev = curr;
                curr = next;
                next = sc.nextLine();
                for (int i = 0; i < nameFile.length; i++) {
                    if (StringUtils.containsIgnoreCase(nameFile[i].trim(),
                            next.substring(767).trim())) {
                        System.out.println("file name exist");
                        writeFile = new BufferedWriter(
                                new FileWriter(destination.concat(nameFile[i]).trim(), true));
                        writeFile.write(next);
                        writeFile.newLine();
                        writeFile.flush();
                        pilah.setCreatedBy(userExecutor);
                        pilah.setCreationDate(now);
                        pilah.setFlag('Y');
                        pilah.setFileName(nameFile[i]);
                        System.out.println(pilah.getFileName());
                        pilah.setLocationDir(destination);
                        pilah.setCardId(next.substring(1, 51).trim());
                        System.out.println(pilah.getCardId());
                        pilah.setOwner(next.substring(52, 102).trim());
                        System.out.println(pilah.getOwner());
                        System.out.println(pilah.toString());
                        repoPilah.save(pilah);
                    } else {
                        System.out.println("Invalid file name");
                    }
                }

            }
            sc.close();
        }
    } catch (IOException e) {
        e.printStackTrace();
    }
    return pilah;
}

您好，我是Java Spring Boot的新手。 请帮我。 在我的控制器中，我调用存储库（repoPilah）在每个循环（同时）中保存数据，但这只是保存txt文件中的最后一行。 我不知道为什么，但是当我打印每个数据Get on（pilah）对象时，我可以每行获取数据。 感谢您的关注

Answer 1

您必须为每个条目在循环内创建pilah对象

PilahFile pilah = new PilahFile();

每次保存时将其移入循环以创建新对象。