Java 文件简单复制操作

import java.io.*;public class TestOutputStream {public static void main(String[] args){int b=0;FileInputStream in=null;FileOutputStream out=null;try{in=new FileInputStream("E:/a.txt");out=new FileOutputStream("E:/b.txt");while((b=in.read()) != -1){out.write(b);}in.close();out.close();}catch(FileNotFoundException e){System.out.println("找不到文件。");System.exit(-1);}catch(IOException e1){System.out.println("文件复制错误。");System.exit(-1);}System.out.println("文件复制成功。");}}