Question

这是我用于读取平面缓冲区文件的代码。我总是得到一个EOF例外。我该如何摆脱这种例外......

  File file = new   File("/Users/samarnath/RmsOne/CreateFlatBuffer/src/com/rms/objects/SingleCoverRiskPolicy.fb");
    RandomAccessFile randomAccessFile = new RandomAccessFile(file, "r");
    int size;
    byte[] data = new byte[0];

    while ((randomAccessFile.read(data, 0, 0)) != -1)
    {
        try {
            size = randomAccessFile.readInt();
            data = new byte[size];
            randomAccessFile.read(data, 0, size);

            ByteBuffer bb = ByteBuffer.wrap(data);
            SingleCoverRiskPolicy singleCoverRiskPolicy = SingleCoverRiskPolicy.getRootAsSingleCoverRiskPolicy(bb);
            System.out.println(singleCoverRiskPolicy.id());

        } catch (EOFException e) {

            randomAccessFile.close();
            e.printStackTrace();
        }
    }

Answer 1

我对您的代码感到困惑......首先，byte[] data = new byte[0];没有任何用处，因为您稍后会覆盖它。其次，您在try-catch外创建new RandomAccessFile()。第三，您似乎将0的字节长度传递给randomAccessFile.read(buffer, offset, length)。如果您对其中任何一个有意义，请发表评论以澄清。

如果你看一下Java Test文件，他们有一个你可以参考的例子：https://github.com/google/flatbuffers/blob/master/tests/JavaTest.java#L30

尝试这样的事情：

*注意：我没有编译这段代码。但它应该足以解决你的问题。

File file = new File("/Users/samarnath/RmsOne/CreateFlatBuffer/src/com/rms/objects/SingleCoverRiskPolicy.fb");
RandomAccessFile randomAccessFile = null;
byte[] data = null;

try {
    randomAccessFile = new RandomAccessFile(file, "r");
    data = new byte[(int)randomAccessFile.length()];
    randomAccessFile.readFully(data);
    randomAccessFile.close();
} catch(java.lang.IllegalArgumentException e) {
    e.printStackTrace();
} catch(java.io.IOException e) {
    e.printStackTrace();
} catch(java.io.FileNotFoundException e) {
    e.printStackTrace()
} catch(java.lang.SecurityException e) {
    e.printStackTrace()
} // Note: You can clean up these exceptions as needed (depending on your Java version).

// You're done reading it, now convert to a ByteBuffer and begin using.
ByteBuffer bb = ByteBuffer.wrap(data);
SingleCoverRiskPolicy singleCoverRiskPolicy = SingleCoverRiskPolicy.getRootAsSingleCoverRiskPolicy(bb);
System.out.println(singleCoverRiskPolicy.id());

读取平坦缓冲区总是在最后一行之后给出EOF异常

1 个答案: