Java Object Save writeObject(File file, Object object)

Description

writes the spcified object to the file specified

License

Open Source License

Parameter

Parameter	Description
file	the file
object	the object to be serialized to file

Exception

Parameter	Description
IOException	Any exception thrown by the underlying OutputStream.
InvalidClassException	Something is wrong with a class used by serialization.
NotSerializableException	the object to be serialized does not implement the java.io.Serializable interface.

Declaration

public static void writeObject(File file, Object object)
        throws IOException, InvalidClassException, NotSerializableException 

Method Source Code

//package com.java2s;
/*/*from   w ww . ja v a  2s. co  m*/
 * net/balusc/util/FileUtil.java
 *
 * Copyright (C) 2007 BalusC
 *
 * This program is free software: you can redistribute it and/or modify it under the terms of the
 * GNU Lesser General Public License as published by the Free Software Foundation, either version 3
 * of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without
 * even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License along with this library.
 * If not, see <http://www.gnu.org/licenses/>.
 */

import java.io.Closeable;
import java.io.File;

import java.io.FileOutputStream;

import java.io.IOException;

import java.io.InvalidClassException;
import java.io.NotSerializableException;

import java.io.ObjectOutputStream;

public class Main {
    /**
     * writes the spcified object to the file specified
     * @param file the file
     * @param object the object to be serialized to file
     * @throws IOException Any exception thrown by the underlying OutputStream.
     * @throws InvalidClassException Something is wrong with a class used by serialization.
     * @throws NotSerializableException the object to be serialized does not implement the java.io.Serializable interface.
     */
    public static void writeObject(File file, Object object)
            throws IOException, InvalidClassException, NotSerializableException {
        mkdirs(file);
        ObjectOutputStream output = null;

        try {
            output = new ObjectOutputStream(new FileOutputStream(file));
            output.writeObject(object);
        } finally {
            close(output, file);
        }
    }

    /**
     * Check and create missing parent directories for the given file.
     * @param file The file to check and create the missing parent directories for.
     * @throws IOException If the given file is actually not a file or if creating parent
     * directories fails.
     */
    private static void mkdirs(File file) throws IOException {
        if (file.exists() && !file.isFile()) {
            throw new IOException("File " + file.getPath() + " is actually not a file.");
        }
        File parentFile = file.getParentFile();
        if (!parentFile.exists() && !parentFile.mkdirs()) {
            throw new IOException("Creating directories " + parentFile.getPath() + " failed.");
        }
    }

    /**
     * Close the given I/O resource of the given file.
     * @param resource The I/O resource to be closed.
     * @param file The I/O resource's subject.
     */
    private static void close(Closeable resource, File file) {
        if (resource != null) {
            try {
                resource.close();
            } catch (IOException e) {
                String message = "Closing file " + file.getPath() + " failed.";
                // Do your thing with the exception and the message. Print it, log it or mail it.
                System.err.println(message);
                e.printStackTrace();
            }
        }
    }

    /**
     * Close the given I/O resource.
     * @param resource The I/O resource to be closed.
     */
    public static void close(Closeable resource) {
        if (resource != null) {
            try {
                resource.close();
            } catch (IOException e) {
                System.err.println("Closing resource failed!");
                e.printStackTrace();
            }
        }
    }
}

Related

1. writeObject(File f, Object obj)
2. writeObject(File f, Serializable obj)
3. writeObject(File file, Object obj)
4. writeObject(File file, Object object)
5. writeObject(File file, Object object)
6. writeObject(File file, Object object)
7. writeObject(File file, Object object)