Java FileInputStream Copy copyFile(File srcFile, File destFile)

Description

copy File

License

Apache License

Declaration

public static void copyFile(File srcFile, File destFile) throws IOException 

Method Source Code

//package com.java2s;
//License from project: Apache License 

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

public class Main {
    public static void copyFile(File srcFile, File destFile) throws IOException {
        copyFile(srcFile, destFile, true);
    }/*from   ww  w  .ja  va  2  s . com*/

    public static void copyFile(File srcFile, File destFile, boolean preserveFileDate) throws IOException {
        if (srcFile == null) {
            throw new NullPointerException("Source must not be null");
        }
        if (destFile == null) {
            throw new NullPointerException("Destination must not be null");
        }
        if (!srcFile.exists()) {
            throw new FileNotFoundException("Source '" + srcFile + "' does not exist");
        }
        if (srcFile.isDirectory()) {
            throw new IOException("Source '" + srcFile + "' exists but is a directory");
        }
        if (srcFile.getCanonicalPath().equals(destFile.getCanonicalPath())) {
            throw new IOException("Source '" + srcFile + "' and destination '" + destFile + "' are the same");
        }
        if ((destFile.getParentFile() != null) && (!destFile.getParentFile().exists())
                && (!destFile.getParentFile().mkdirs())) {
            throw new IOException("Destination '" + destFile + "' directory cannot be created");
        }

        if ((destFile.exists()) && (!destFile.canWrite())) {
            throw new IOException("Destination '" + destFile + "' exists but is read-only");
        }
        doCopyFile(srcFile, destFile, preserveFileDate);
    }

    private static void doCopyFile(File srcFile, File destFile, boolean preserveFileDate) throws IOException {
        if ((destFile.exists()) && (destFile.isDirectory())) {
            throw new IOException("Destination '" + destFile + "' exists but is a directory");
        }

        FileInputStream input = new FileInputStream(srcFile);
        try {
            FileOutputStream output = new FileOutputStream(destFile);
            try {
                copy(input, output);
            } finally {
                closeQuietly(output);
            }
        } finally {
            closeQuietly(input);
        }

        if (srcFile.length() != destFile.length()) {
            throw new IOException("Failed to copy full contents from '" + srcFile + "' to '" + destFile + "'");
        }

        if (preserveFileDate)
            destFile.setLastModified(srcFile.lastModified());
    }

    public static int copy(InputStream input, OutputStream output) throws IOException {
        long count = copyLarge(input, output);
        if (count > 2147483647L) {
            return -1;
        }
        return (int) count;
    }

    public static void closeQuietly(InputStream input) {
        try {
            if (input != null)
                input.close();
        } catch (IOException ioe) {
        }
    }

    public static void closeQuietly(OutputStream output) {
        try {
            if (output != null)
                output.close();
        } catch (IOException ioe) {
        }
    }

    public static long copyLarge(InputStream input, OutputStream output) throws IOException {
        byte[] buffer = new byte[4096];
        long count = 0L;
        int n = 0;
        while (-1 != (n = input.read(buffer))) {
            output.write(buffer, 0, n);
            count += n;
        }
        return count;
    }
}

Related

1. copyFile(File src, File target)
2. copyFile(File src, File toDir)
3. copyFile(File srcFile, File destFile)
4. copyFile(File srcFile, File destFile)
5. copyFile(File srcFile, File destFile)
6. copyFile(File srcFile, File destFile)
7. CopyFile(File srcFile, File destFile)
8. copyFile(File srcFile, File destFile)
9. copyFile(File srcFile, File destFile)