java ObjectInputStream 抛出 EOFException
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ObjectInputStream throws EOFException
提问by ams
I'm writing a class to keep track of competition data at a tournament. I want to store this class to a file, so am using an ObjectInputStream. The class I am writing implements Serializable. I'm getting an EOFException, and none of the solutions I've found on SO and elsewhere actually address this issue.
我正在编写一个类来跟踪锦标赛中的比赛数据。我想将这个类存储到一个文件中，所以我使用了一个ObjectInputStream. 我正在编写的类实现了可序列化。我得到了一个EOFException，我在 SO 和其他地方找到的解决方案都没有真正解决这个问题。
My file writer is:
我的文件编写器是：
public void writeToFile(String path) {
File f = new File(path);
if(f.exists()) f.delete();
try {
OutputStream fileOut = new FileOutputStream(path);
OutputStream bufferOut = new BufferedOutputStream(fileOut);
ObjectOutput output = new ObjectOutputStream(bufferOut);
output.writeObject(this);
} catch(IOException e) {}
}
My file reader is:
我的文件阅读器是：
public static DivisionDataFTC readFromFile(String path) {
try {
InputStream fileIn = new FileInputStream(path);
InputStream bufferIn = new BufferedInputStream(fileIn);
ObjectInput input = new ObjectInputStream(bufferIn);
System.out.println(input.read());
} catch(Exception e) {
System.out.println(path);
e.printStackTrace();
}
if(1==1) throw new Error("Could not read DivisionDataFTC at " + path);
return null;
}
I write the data successfully - I have verified that the file is notempty. (Its contents, if relevant, are consistently 7.99kb).
我成功写入数据 - 我已验证文件不为空。（如果相关，其内容始终为 7.99kb）。
To be clear, the error does not occur on the instantiation of the ObjectOutputStream. This is what makes this question different - the error occurs on the readObject() call. My output is a remarkably long EOFException:
需要明确的是，该错误不会发生在 ObjectOutputStream 的实例化上。这就是这个问题的不同之处 - 错误发生在 readObject() 调用上。我的输出非常长EOFException：
java.io.EOFException
at java.io.ObjectInputStream$BlockDataInputStream.peekByte(ObjectInputStream.java:2571)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1315)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:369)
at java.util.ArrayList.readObject(ArrayList.java:733)
(...cut out most of this because nobody wants to read it...)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:369)
at tournamentftc.DivisionDataFTC.readFromFile(DivisionDataFTC.java:297)
at firstscouting.FIRSTScouting.runGUI(FIRSTScouting.java:82)
at firstscouting.FIRSTScouting.main(FIRSTScouting.java:101)
Exception in thread "main" java.lang.Error: Could not read DivisionDataFTC at C:\Users\Noah\Desktop\out.ser
at tournamentftc.DivisionDataFTC.readFromFile(DivisionDataFTC.java:303)
at firstscouting.FIRSTScouting.runGUI(FIRSTScouting.java:82)
at firstscouting.FIRSTScouting.main(FIRSTScouting.java:101)
I'm not sure why this is happening. How do I handle this?
我不确定为什么会这样。我该如何处理？
回答by Evgeniy Dorofeev
You should close ObjectOutputStream, try
你应该关闭 ObjectOutputStream，试试
ObjectOutput output = new ObjectOutputStream(bufferOut);
output.writeObject(this);
output.close();
回答by ams
You need to close your output stream, and you also nee to call readObject() not read.
您需要关闭输出流，并且您还需要调用 readObject() 未读。
