Java FileInputStream Copy copyFile(File sourceFile, File destDir)

Description

Copy source file to dest dir.

License

Apache License

Parameter

Parameter	Description
sourceFile	The source file.
destDir	The destination dir, not a file.

Declaration

public static final void copyFile(File sourceFile, File destDir) throws IOException 

Method Source Code

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

import java.io.BufferedOutputStream;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;

public class Main {
    /**//from   w w  w  . ja  va  2  s . c o  m
     * Copy source file to dest dir.
     * @param sourceFile The source file.
     * @param destDir The destination dir, not a file.
     */
    public static final void copyFile(File sourceFile, File destDir) throws IOException {
        boolean copy = false;
        File destFile = new File(destDir, sourceFile.getName());
        if (!destFile.exists()) {
            copy = true;
        } else if (sourceFile.lastModified() > destFile.lastModified()) {
            copy = true;
        }
        if (copy) {
            BufferedOutputStream bos = null;
            try {
                FileOutputStream fos = new FileOutputStream(destFile);
                bos = new BufferedOutputStream(fos);
                byte[] raw = readFileBytes(sourceFile.getAbsolutePath());
                bos.write(raw);
            } finally {
                bos.close();
                bos = null;
            }
        }
    }

    /**
     * Read the file raw content into byte array.
     * @param fileName
     * @return
     */
    public static final byte[] readFileBytes(String fileName) throws IOException {
        File file = new File(fileName);
        return readFileBytes(file);
    }

    /**
     * Read the file raw content into byte array.
     * @param fileName
     * @return
     */
    public static final byte[] readFileBytes(File file) throws IOException {
        if (file.exists() && file.isFile()) {
            FileInputStream fis = new FileInputStream(file);
            int fileLen = (int) file.length();
            byte[] buf = new byte[fileLen];
            int len = 0;
            while (len < fileLen) {
                int n = fis.read(buf, len, fileLen - len);
                if (n >= 0) {
                    len += n;
                } else {
                    break;
                }
            }
            return buf;
        } else {
            throw new IOException(file + " does not exist or is not file!");
        }
    }
}

Related

1. copyFile(File source, File target)
2. copyFile(File source, File target, boolean createParents, FileFilter filter)
3. copyFile(File source, File target, boolean deleteSourceAfter)
4. copyFile(File source, File target, boolean replaceIfExists)
5. copyFile(File sourceDir, File destDir, String filename)
6. copyFile(File sourceFile, File destFile)
7. copyFile(File sourceFile, File destFile)
8. copyFile(File sourceFile, File destFile)
9. copyFile(File sourceFile, File destFile)