Question

我正在尝试创建一个可以序列化和反序列化对象的类。该类应该以这种方式工作：我序列化对象并将其发送到服务器，然后服务器将修改我的对象的一个字段并将其发回，以便我可以反序列化收到的对象。但是，如果我关闭OutputStream，我会收到套接字写入错误。如何正确关闭OutputStream和InputStream？

修改即使我使用try-with-resources，我仍然会遇到同样的错误。

代码：

public class UtilSerialize {
InetAddress address;
Socket socketConnection;

public UtilSerialize() {
    try {
        this.address = InetAddress.getLocalHost();
        socketConnection = new Socket(address, 8000);
    } catch (IOException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
}

public void serializeObject() {

    try {
        OrdinaryUser user = new OrdinaryUser("Joe", "Joe");
        ObjectOutputStream clientOutputStream = new ObjectOutputStream(socketConnection.getOutputStream());

        clientOutputStream.writeObject(user);

        System.out.println(user.getUsername());

        //clientOutputStream.close();

    } catch (Exception e) {
        System.out.println(e);
    }
}

public void deSerializeObject() {
    try {
        ObjectInputStream clientInputStream = new ObjectInputStream(socketConnection.getInputStream());
        OrdinaryUser user = (OrdinaryUser) clientInputStream.readObject();
        System.out.println(user.getUsername());
        clientInputStream.close();
    } catch(Exception e)
    {
        e.printStackTrace();
    }
}
}

这是我得到的例外，它在服务器端：

java.net.SocketException: Software caused connection abort: socket write error
at java.net.SocketOutputStream.socketWrite0(Native Method)
at java.net.SocketOutputStream.socketWrite(Unknown Source)
at java.net.SocketOutputStream.write(Unknown Source)
at java.io.ObjectOutputStream$BlockDataOutputStream.drain(Unknown Source)
at java.io.ObjectOutputStream$BlockDataOutputStream.setBlockDataMode(Unknown Source)
at java.io.ObjectOutputStream.writeNonProxyDesc(Unknown Source)
at java.io.ObjectOutputStream.writeClassDesc(Unknown Source)
at java.io.ObjectOutputStream.writeOrdinaryObject(Unknown Source)
at java.io.ObjectOutputStream.writeObject0(Unknown Source)
at java.io.ObjectOutputStream.writeFatalException(Unknown Source)
at java.io.ObjectOutputStream.writeObject(Unknown Source)
at ro.unitbv.serverinvoicemanagement.classes.ServerThread.run(ServerThread.java:29)
at java.lang.Thread.run(Unknown Source)

Answer 1

但是如果我关闭outputStream，我会收到套接字写入错误。

你为什么要这样做？

这里：

ObjectOutputStream clientOutputStream = new ObjectOutputStream(socketConnection.getOutputStream());

clientOutputStream变量是指套接字的输出流如果你关闭它，你关闭插座。

这是同样的事情：

ObjectInputStream clientInputStream = new ObjectInputStream(socketConnection.getInputStream());

clientInputStream变量指的是套接字的输入流如果你关闭它，你关闭套接字。

虽然在读/写时需要套接字，但您不必关闭与之关联的流否则套接字将不再处于可用状态，并且套接字上的读/写操作将失败。

Answer 2

你可以尝试将它放在finally块中：

public void deSerializeObject() {
    ObjectInputStream clientInputStream = null;

    try {
        clientInputStream = new ObjectInputStream(socketConnection.getInputStream());
        OrdinaryUser user = (OrdinaryUser) clientInputStream.readObject();
    } catch(Exception e) {
        e.printStackTrace();
    } finally {
        clientInputStream.close();
    }

}

正确关闭ObjectInputStream和ObjectOutputStream的方法

2 个答案: