指定文件复制到文件夹内-code

指定文件复制到文件夹内

/**
 * @author 南风知我意唔
 * @version 1.0
 * 文件复制
 */
public class MyFileSys {
    public static void main(String[] args) throws IOException {
        Scanner input=new Scanner(System.in);
        MyFileSys sys=new MyFileSys();
        System.out.print("源文件路径：");
        String path=input.next();
        System.out.print("目标路径:");
        String newPath=input.next();
        boolean b = sys.fileCopy(path, newPath);

        if (b){
            System.out.println("成功");
        }
    }

    /**
     *
     * @param srcFile 原文件的绝对路径
     * @param target 目标目录
     * @return
     * @throws IOException 如果因为源文件的权限问题会有可能抛出IOException
     */
    public boolean fileCopy(String srcFile, String target) throws IOException {
        File f1=new File(srcFile);
        File f2=new File(target);
        if (!f1.exists()||!f2.exists()){
            throw new NotFilePathException("文件或目录不存在："+(f1.exists()?target:(f2.exists()?srcFile:srcFile+","+target)));
        }
        if (!f1.isFile()){
            throw new NotIsFileOrDirectoryException("不是一个文件："+srcFile);
        }
        if (!f2.isDirectory()){
            throw new NotIsFileOrDirectoryException("不是一个目录："+target);
        }
        String s = File.separator.toString();
        String[] split = srcFile.split(s+s);
        //获得目标文件的名fileName
        String fileName=split[split.length-1];
        //获得目标文件对象
        File file=new File(target+File.separator+fileName);
        boolean mkdir = false;
        try {
            mkdir = file.createNewFile();
        } catch (IOException e) {
            e.printStackTrace();
        }
        //获得目标原文件的输入流
        FileInputStream fileInputStream=fileInputStream=new FileInputStream(f1);
        FileOutputStream fileOutputStream=new FileOutputStream(file);
        int b=0;
        byte[] bytes=new byte[1024];
        while ((b=fileInputStream.read(bytes))!=-1){
            fileOutputStream.write(bytes,0,b);
            fileOutputStream.flush();
            bytes=new byte[1024];
        }
        fileOutputStream.close();
        fileInputStream.close();
        return true;
    }
}

/**
 * file的路径不存在
 */
class NotFilePathException extends RuntimeException {
    public NotFilePathException(String message) {
        super(message);
    }
}

/**
 * 不是一个文件或者一个目录
 */
class NotIsFileOrDirectoryException extends  RuntimeException{
    public NotIsFileOrDirectoryException(String message) {
        super(message);
    }
}