无效的流头：从字节字符串转换对象时，EFBFBDEF [英] invalid stream header: EFBFBDEF when converting object from byte string

问题描述

我正在尝试将ArrayList对象转换为字节字符串，以便可以通过套接字发送它。当我运行此代码时，它会正确转换为字符串，但是当我尝试将其转换回时，会出现异常 java.io.StreamCorruptedException：无效的流头：EFBFBDEF。我在这里查看的其他答案并没有真正帮助，因为我正在使用匹配的ObjectOutputStream和ObjectInputStream。抱歉，如果有一个简单的修复方法，因为我是流对象的新手。

  try {
 ArrayList< String> ; text = new ArrayList<>（）; 
 text.add（ Hello World！）; 
字符串byteString = Utils.StringUtils.convertToByteString（text）; 
 ArrayList< String> convertSet =（ArrayList< String>）Utils.StringUtils.convertFromByteString（byteString）; 
 VCS.getServiceManager（）。addConsoleLog（convertedSet.get（0））; 
} catch（IOException | ClassNotFoundException e）{
 e.printStackTrace（）; 
} 
 
公共静态字符串convertToByteString（Object object）引发IOException {
 try（ByteArrayOutputStream bos = new ByteArrayOutputStream（）; ObjectOutput out = new ObjectOutputStream（bos））{
 out.writeObject（object）; 
最后的byte [] byteArray = bos.toByteArray（）; 
返回新的String（byteArray）; 
} 
} 
 
公共静态对象convertFromByteString（String byteString）抛出IOException，ClassNotFoundException {
最后的byte [] bytes = byteString.getBytes（）; 
 try（ByteArrayInputStream bis = new ByteArrayInputStream（bytes）; ObjectInput in = new ObjectInputStream（bis））{
 return in.readObject（）; 
} 
} 
  

解决方案

字符串不是二进制数据的容器。您需要传递原始的字节数组，或者对其进行十六进制或base64编码。

更好的是，直接序列化到套接字并完全摆脱掉。 / p>

I am trying to convert a ArrayList object to a byte string so it can be sent via sockets. When I run this code it converts to a string properly but when I try to convert it back I get the exception "java.io.StreamCorruptedException: invalid stream header: EFBFBDEF". Other answers I looked at on here didn't really help as I am using the matching ObjectOutputStream and ObjectInputStream. Sorry if there is a simple fix as I am new to working with stream objects.

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();
        }
    }

解决方案

String is not a container for binary data. You need to pass around the original byte array, or hex- or base64-encode it.

Better still, serialize directly to the socket and get rid of this altogether.

这篇关于无效的流头：从字节字符串转换对象时，EFBFBDEF的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！