首页 > 代码库 > IO流复制文件

IO流复制文件

1. 经过测试可以复制 txt excel csv exe pdf文件其他格式的没测,估计也没问题

public class Hello {    private static final  String LINE_SEPARATOR = System.getProperty("line.separator");//换行    public static void main(String[] args) throws Exception {        FileInputStream reader = new FileInputStream("d:/毕向东Java基础课堂笔记.pdf");        FileOutputStream writer = new FileOutputStream("e:\\毕向东Java基础课堂笔记.pdf");        int len = 0;        byte[] buffer = new byte[1024*1024];//1MB缓存        while((len = reader.read(buffer))!=-1){ //len = reader.read(buffer) buffer千万不要忘了,否则复制的文件超大            writer.write(buffer ,0 , len);            writer.flush();        }        System.out.println("复制成功");        writer.close();        reader.close();    }}

 2.优化复制文件

    public static void main(String[] args) throws Exception {        File src = http://www.mamicode.com/new File("d:/Evernote_6.1.2.2292.exe");        File des = new File("e:\\NEW_Evernote_6.1.2.2292.exe");        copyFile(src,des);    }    private static void copyFile(File src, File des) throws  Exception{        FileInputStream reader = new FileInputStream(src);        FileOutputStream writer = new FileOutputStream(des);        int len = 0;        byte[] buffer = new byte[1024*1024];//1MB缓存        while((len = reader.read(buffer))!=-1){ //len = reader.read(buffer) buffer千万不要忘了,否则复制的文件超大,陷入死循环            writer.write(buffer ,0 , len);            writer.flush();        }        System.out.println("复制成功");        writer.close();        reader.close();    }

 

IO流复制文件