java - 无效的流 header : EFBFBDEF when converting object from byte string

Question

我正在尝试将 ArrayList 对象转换为字节字符串，以便它可以通过套接字发送。当我运行此代码时，它会正确转换为字符串，但当我尝试将其转换回来时，出现异常“java.io.StreamCorruptedException:无效的流 header :EFBFBDEF”。我在这里看到的其他答案并没有真正帮助，因为我使用的是匹配的 ObjectOutputStream 和 ObjectInputStream。很抱歉，如果有一个简单的修复方法，因为我是使用流对象的新手。

try {
        ArrayList<String> text = new ArrayList<>();
        text.add("Hello World!");
        String byteString = Utils.StringUtils.convertToByteString(text);
        ArrayList<String> convertedSet = (ArrayList<String>) Utils.StringUtils.convertFromByteString(byteString);
        VCS.getServiceManager().addConsoleLog(convertedSet.get(0));
    } catch (IOException | ClassNotFoundException e) {
        e.printStackTrace();
    }

public static String convertToByteString(Object object) throws IOException {
        try (ByteArrayOutputStream bos = new ByteArrayOutputStream(); ObjectOutput out = new ObjectOutputStream(bos)) {
            out.writeObject(object);
            final byte[] byteArray = bos.toByteArray();
            return new String(byteArray);
        }
    }

public static Object convertFromByteString(String byteString) throws IOException, ClassNotFoundException {
        final byte[] bytes = byteString.getBytes();
        try (ByteArrayInputStream bis = new ByteArrayInputStream(bytes); ObjectInput in = new ObjectInputStream(bis)) {
            return in.readObject();
        }
    }

Answer 1

我想通了。我不得不使用 Base64 编码。转换方法必须更改为以下内容:

public static String convertToByteString(Object object) throws IOException {
        try (ByteArrayOutputStream bos = new ByteArrayOutputStream(); ObjectOutput out = new ObjectOutputStream(bos)) {
            out.writeObject(object);
            final byte[] byteArray = bos.toByteArray();
            return Base64.getEncoder().encodeToString(byteArray);
        }
    }

public static Object convertFromByteString(String byteString) throws IOException, ClassNotFoundException {
        final byte[] bytes = Base64.getDecoder().decode(byteString);
        try (ByteArrayInputStream bis = new ByteArrayInputStream(bytes); ObjectInput in = new ObjectInputStream(bis)) {
            return in.readObject();
        }
    }