原 自学JVAVA---（51）--（内功心法【49】）装饰流

装饰流
【小城贝尔】
装饰皆为节点生，节点均是装饰心。
方法调用多相似，只因接口无多字。
缓冲字符字节流，好似蛟龙水中游。
操作效率升大半，字符新添行里看。

public class BufferdeDemo {
    public static void main(String[] args) {
        copyUseByte("E:/java1.mp4","E:/java1ChengCheng.mp4");
        copyUseRedWri("src/InnerClass/InnerClass.java","src/IODemo/copy-innerclass.java");
    }
    //Bufferded字节流文件拷贝
    public static void copyUseByte(String src , String  desc){
        InputStream in = null;
        OutputStream out = null;
        try {
           in = new BufferedInputStream(new FileInputStream(src));
           out = new BufferedOutputStream(new FileOutputStream(desc));
           byte[] bytes = new byte[1024];
           int len = -1;
           while ( (len = in.read(bytes)) != -1){
               out.write(bytes,0,len);
           }
           out.flush();
        } catch (Exception e) {
            e.printStackTrace();
        }finally {
            //手动关闭流 但是jdk1.7以后使用try with resource 写法自动关闭流
            closeIO(in,out);
        }
    }
    //Buffered字符流文件拷贝
    public static void copyUseRedWri(String src , String desc){
        BufferedReader in = null;
        BufferedWriter out = null;
        try {
            in = new BufferedReader(new FileReader(src));
            out = new BufferedWriter(new FileWriter(desc));
            String line = null;
            while ((line = in.readLine()) != null){
                out.write(line);
                out.newLine();
            }
            out.flush();
        }catch (Exception e){
            e.printStackTrace();
        }finally {
            //手动关闭流 但是jdk1.7以后使用try with resource 写法自动关闭流
            closeIO(in,out);
        }
    }
    //因为所有的流都实现了closeable接口所以定义一个统一的方法关闭流
    public  static  void  closeIO(Closeable ...ios){
        for (Closeable io:ios){
            try {
                if (io != null){
                    io.close();
                }
                System.out.println("io has closed ");
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }
}