如何使用java代码复制文件呢?

复制文件的实现思路

借助FileInputStream和FileOutputStream 可实现文件复制的效果

public static void copyFile(File sourceFile, File destFile) throws IOException {
    if(!destfile.exists()) {
        destFile.createNewFile();
    }

    FileChannel source = null;
    FileChannel destination = null;

    try {
        source = new FileInputStream(sourceFile).getChannel();
        destination = new FileOutputStream(destFile).getChannel();
        destination.transferFrom(source, 0, source.size());
    }
    finally {
        if(source != null) {
            source.close();
        }
        if(destination != null) {
            destination.close();
        }
    }
}