java - Writer 不写入文件，只创建文件

Question

我正在研究转换器。我加载文件，开始从中读取日期，并按年、月、日创建目录(+另一个目录)，最后是那些转换后的文本文件。创建这些目录时一切都很好，但在文本文件中什么都没有或只是其中的一部分。

public static void convertFile(File fileToConvert, File whereToSave, long shift) {
    BufferedReader reader = null;
    BufferedWriter writer = null;
    String oldDate = "";
    String newDate = "";
    boolean boolDate = true;

    try {

        for (File file : fileToConvert.listFiles()) {
            reader = new BufferedReader(new FileReader(file));

            boolean block = true;
            String line = "";
            int lineCounter = 0;
            while ((line = reader.readLine()) != null) {
                if (lineCounter==0) {
                    block = true;
                } else {
                    block = false;
                }

                line = line.replaceAll("[^0-9-,:+NaN.]", "");
                String[] data = line.split(",");

                if (block) {
                    data[0] = data[0].substring(0, 10) + " " + data[0].substring(10);
                    data[0] = SimulatorForRealData.timeShift(data[0], shift);
                    // ====================================================================================
                    newDate = data[0].substring(0, 4) + " " + data[0].substring(5, 7) + " "
                            + data[0].substring(8, 10);

                    String savingIn = SimulatorForRealData.createDirs(whereToSave.toString(),
                            data[0].substring(0, 4), data[0].substring(5, 7), data[0].substring(8, 10));

                    File f = new File(savingIn + "\\" + FILE_NAME + ".log");

                    if (!newDate.equals(oldDate) && boolDate == false) {
                        writer.close();
                        boolDate = true;

                    } else {
                        oldDate = newDate;
                        boolDate = false;

                    }

                    writer = new BufferedWriter(new FileWriter(f));



                    // =====================================================================================
                    writer.write("<in date=\"" + data[0].substring(0, 10) + "T" + data[0].substring(11)
                            + "\" t=\"1\" >\n");
                    writer.write(data[0] + "\n");
                    writer.write(0 + " " + 0 + " " + 0 + "\n");
                    for (int x = 0; x <= 10; x++) {
                        writer.write("NaN" + " ");
                    }
                    writer.write("\n");

                    for (String s : data) {
                        if (s.equals(data[0])) {
                            continue;
                        }
                        writer.write(s + ";");
                    }
                    writer.write("\n");
                } else {
                    for (String s : data) {
                        writer.write(s + ";");
                    }
                    writer.write("\n");
                }
                lineCounter++;
                if (lineCounter == 118) {
                    lineCounter = 0;
                    writer.write("</in>\n\n");
                }

            }
        }
    } catch (IOException e) {
        e.printStackTrace();
    } finally {
        try {
            writer.close();
            reader.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

这是我执行它的方法。有人能帮我吗。我尝试了不同的“作家”，但一无所获。我怀疑关闭文件时会出现问题，但我不确定。

Answer 1

我认为你应该关闭你创建的每一个编写器，而不仅仅是最后一个。

for (File file : fileToConvert.listFiles()) {
   reader = new BufferedReader(new FileReader(file));
   ...
   writer = new BufferedWriter(new FileWriter(f));
   while ((line = reader.readLine()) != null) {
       ....
   }
   writer.close();
}

仅当缓冲区溢出或关闭时，写入器才会刷新磁盘上的所有更改。