java 复制文件和图片

一 复制文件采用 BufferedReader和 BufferedWriter 作为缓存


public static void main(String[] args) throws IOException {
// TODO Auto-generated method stub
BufferedReader br=
                 new BufferedReader(new FileReader("c:\\2.txt"));
String b = null;
//写入文件
BufferedWriter bw =
                 new BufferedWriter(new FileWriter("c:\\c.txt")); 
//每次读一行 对于读取 txt或者html 等有换行符是可以的  while ((b = br.readLine()) != null) { 
                 bw.write(b);//输出字符串 
bw.newLine();
//将缓存写入文件
bw.flush(); 
} 

br.close();
bw.close();

}
二 复制图片

public static void main(String[] args) throws IOException {
// TODO Auto-generated method stub
        FileInputStream fis = new FileInputStream("c:\\a.jpg");
        FileOutputStream fos = new FileOutputStream("c:\\b.jpg");

byte[] buffer = new byte[2048];
         int len =0;
while((len=fis.read(buffer))>0){
fos.write(buffer, 0, len);
}

fis.close();
fos.close();
}