public class Demo02 { public static void main(String[] args) { //获取当前毫秒值,用于测试 long l = System.currentTimeMillis(); //创建文件对象,需要读取的文件 File file = new File("F:/java/sql语句的执行顺序.txt"); //写入的文件 File file2 = new File("F:/test2.txt"); //创建字节输入流和输出流 BufferedInputStream in=null; BufferedOutputStream out=null; //创建一个存储数据的字节数组 byte [] b=new byte [3]; try { in =new BufferedInputStream( new FileInputStream(file)); out = new BufferedOutputStream(new FileOutputStream(file2)); int read=0; //如果没有数据了会返回-1;如果还有会返回数据的长度 while ((read = in.read(b))!=-1) { //读取多少输出多少 out.write(b,0,read); } //刷新 out.flush(); } catch (Exception e) { // TODO Auto-generated catch block e.printStackTrace(); }finally { //关流 if(out!=null){ try { out.close(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } if(in!=null){ try { in.close(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } } long m = System.currentTimeMillis(); System.out.println(m-l); } //------------------------------------------------------------------------------------------------------------- public static void demo02(){ long l = System.currentTimeMillis(); //创建文件对象,需要读取的文件 File file = new File("F:/java/sql语句的执行顺序.txt"); //写入的文件 File file2 = new File("F:/test2.txt"); //创建字节输入流和输出流 FileOutputStream out=null; FileInputStream in=null; //创建一个存储数据的字节数组 byte [] b=new byte [3]; try { in = new FileInputStream(file); out = new FileOutputStream(file2); int read=0; //如果没有数据了会返回-1;如果还有会返回数据的长度 while ((read = in.read(b))!=-1) { //读取多少输出多少 out.write(b,0,read); } //刷新 out.flush(); } catch (Exception e) { // TODO Auto-generated catch block e.printStackTrace(); }finally { //关流 if(out!=null){ try { out.close(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } if(in!=null){ try { in.close(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } } long m = System.currentTimeMillis(); System.out.println(m-l); } }
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