Question

的同事。我正在做大学评估，我需要实现FTP服务器通信。序列化似乎正常工作，但反序列化并不适用。我做的步骤：

将FTP文件流检索到ByteArrayOutputStream
关闭流
将流写入字节数组
读取包含在ObjectInputStream中的ByteArrayInputStream的字节数组。

当我尝试阅读对象时，我得到了

java.io.StreamCorruptedException: invalid type code: 00.

以下是代码：

try {
        ftpClient = new FTPClient();
        ftpClient.connect("********",21);
        ftpClient.login("******", "******");
        ftpClient.setFileTransferMode(ftpClient.BINARY_FILE_TYPE);
        ByteArrayOutputStream bos = new ByteArrayOutputStream();
        boolean ok = ftpClient.retrieveFile("/data/" + fileName,bos);
        System.out.println("" + ok + " " + ftpClient.getReplyCode());
        bos.close();
        byte[] b = bos.toByteArray();
        ois = new ObjectInputStream(new ByteArrayInputStream(b));
        if (fileName.contains("dataW")) {
            Warrior character = (Warrior)ois.readObject();
            System.out.println(ftpClient.getReplyCode());
            MainMenu frame = new MainMenu(character);
            frame.setVisible(true);
            frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
            parent.setVisible(false);
        } else {
            Rogue character = (Rogue)ois.readObject();
            MainMenu frame = new MainMenu(character);
            frame.setVisible(true);
            frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
            parent.setVisible(false);
        }
    } catch (IOException e) {
        e.printStackTrace();
    } catch (ClassNotFoundException e) {
        e.printStackTrace();
    }
}

堆栈跟踪：

java.io.StreamCorruptedException: invalid type code: 00
at java.io.ObjectInputStream.readObject0(Unknown Source)
at java.io.ObjectInputStream.defaultReadFields(Unknown Source)
at java.io.ObjectInputStream.readSerialData(Unknown Source)
at java.io.ObjectInputStream.readOrdinaryObject(Unknown Source)
at java.io.ObjectInputStream.readObject0(Unknown Source)
at java.io.ObjectInputStream.readObject(Unknown Source)
at com.mif.mobr0858.GUI.LoadThread.run(LoadThread.java:47)
at com.mif.mobr0858.GUI.FileChooser$2.actionPerformed(FileChooser.java:77)
at javax.swing.AbstractButton.fireActionPerformed(Unknown Source)
at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source)
at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source)
at javax.swing.DefaultButtonModel.setPressed(Unknown Source)
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(Unknown Source)
at java.awt.Component.processMouseEvent(Unknown Source)
at javax.swing.JComponent.processMouseEvent(Unknown Source)
at java.awt.Component.processEvent(Unknown Source)
at java.awt.Container.processEvent(Unknown Source)
at java.awt.Component.dispatchEventImpl(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)
at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)
at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Window.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
at java.awt.EventQueue.access$400(Unknown Source)
at java.awt.EventQueue$3.run(Unknown Source)
at java.awt.EventQueue$3.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
at java.awt.EventQueue$4.run(Unknown Source)
at java.awt.EventQueue$4.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
at java.awt.EventQueue.dispatchEvent(Unknown Source)
at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
at java.awt.WaitDispatchSupport$2.run(Unknown Source)
at java.awt.WaitDispatchSupport$4.run(Unknown Source)
at java.awt.WaitDispatchSupport$4.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.awt.WaitDispatchSupport.enter(Unknown Source)
at java.awt.Dialog.show(Unknown Source)
at java.awt.Component.show(Unknown Source)
at java.awt.Component.setVisible(Unknown Source)
at java.awt.Window.setVisible(Unknown Source)
at java.awt.Dialog.setVisible(Unknown Source)
at com.mif.mobr0858.GUI.WelcomeFrame$2.actionPerformed(WelcomeFrame.java:45)
at javax.swing.AbstractButton.fireActionPerformed(Unknown Source)
at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source)
at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source)
at javax.swing.DefaultButtonModel.setPressed(Unknown Source)
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(Unknown Source)
at java.awt.Component.processMouseEvent(Unknown Source)
at javax.swing.JComponent.processMouseEvent(Unknown Source)
at java.awt.Component.processEvent(Unknown Source)
at java.awt.Container.processEvent(Unknown Source)
at java.awt.Component.dispatchEventImpl(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)
at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)
at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Window.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
at java.awt.EventQueue.access$400(Unknown Source)
at java.awt.EventQueue$3.run(Unknown Source)
at java.awt.EventQueue$3.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
at java.awt.EventQueue$4.run(Unknown Source)
at java.awt.EventQueue$4.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
at java.awt.EventQueue.dispatchEvent(Unknown Source)
at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.run(Unknown Source)

序列化：

try {
        //get current date
        Date date = new Date();
        DateFormat dateFormat = new SimpleDateFormat("dd-MM_HH.mm");
        String fileName;
        String fileName1;
        //select appropriate file name
        if (character instanceof Warrior) {
            fileName = "dataW_" + dateFormat.format(date).toString() + ".dat";
            fileName1 = "dataBW_" + dateFormat.format(date).toString() + ".dat";
        } else {
            fileName = "dataR_" + dateFormat.format(date).toString() + ".dat";
            fileName1 = "dataRW_" + dateFormat.format(date).toString() + ".dat";
        }
        //create file and write data
        File f = new File(fileName);
        File f1 = new File(fileName1);
        oos = new ObjectOutputStream(new FileOutputStream(f));
        oos.writeObject(character);
        oos.close();
        oos = new ObjectOutputStream(new FileOutputStream(f1));
        oos.writeObject(frame);
        //connect to FTP
        FTPClient ftpClient = new FTPClient();
        ftpClient.connect("*****", 21);
        boolean connOK = ftpClient.login("*****", "****");
        if (connOK) {
            MainMenu.uploadSingleFile(ftpClient, f.getAbsolutePath(), "data/" + fileName);
        }
        } catch(IOException e) {
            e.printStackTrace();
        } finally {
            try {
                oos.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }

上传代码：

public static boolean uploadSingleFile(FTPClient ftpClient, String localFilePath,
        String remoteFilePath) throws IOException {
    File localFile = new File(localFilePath);

    InputStream inputStream = new FileInputStream(localFile);
    try {
            ftpClient.setFileTransferMode(ftpClient.BINARY_FILE_TYPE);
            ftpClient.setFileType(ftpClient.BINARY_FILE_TYPE);
            return ftpClient.storeFile(remoteFilePath, inputStream);
    } finally {
        inputStream.close();
    }

如果有人能帮我解决问题，我将不胜感激

Answer 1

您尚未关闭第一个ObjectOutputStream.文件不完整。

从ftp反序列化对象时StreamCorruptedException

1 个答案: