java-如何附加到RandomAccessFile？每次我运行这段代码,数据都会被覆盖

如何使用此代码段附加数据？每次我运行代码时,数据总是被覆盖.

<code>    try{
        RandomAccessFile fileWriter = new RandomAccessFile("Officers.txt", "rw");

        fileWriter.writeUTF(officerObject.getOfficerBadgeNum());
        fileWriter.writeUTF(officerObject.getOfficerFirstName());
        fileWriter.writeUTF(officerObject.getOfficerLastName());
        fileWriter.writeUTF(officerObject.getOfficerPrecint());

        fileWriter.close();
        System.out.println("Data Successfully Saved");
    }
    catch (IOException e) {
        System.out.println("Error in File. Could not SAVE Officer");
        e.printStackTrace();
    }
</code>

解决方法:

写入之前,将seek保留到文件末尾；首先拨打length.我也希望拨打try-with-resources.例如,

<code>try (RandomAccessFile fileWriter = new RandomAccessFile("Officers.txt", "rw")) {
    fileWriter.seek(fileWriter.length());
    fileWriter.writeUTF(officerObject.getOfficerBadgeNum());
    fileWriter.writeUTF(officerObject.getOfficerFirstName());
    fileWriter.writeUTF(officerObject.getOfficerLastName());
    fileWriter.writeUTF(officerObject.getOfficerPrecint());
    System.out.println("Data Successfully Saved");
} catch (IOException e) {
    System.out.println("Error writing File. Could not SAVE Officer");
    e.printStackTrace();
}
</code>

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