//字节流的缓冲流的使用 读写功能
@Test
public void testcopy(){
long start=System.currentTimeMillis();
String src="C:\\Users\\Administrator\\Desktop\\hetao.jpg";
String dest="C:\\Users\\Administrator\\Desktop\\hetao4.jpg";
copyFile(src,dest);
long end=System.currentTimeMillis();
System.out.println((end-start));
}
private void copyFile(String src, String dest) {
// TODO Auto-generated method stub
BufferedInputStream bis=null;
BufferedOutputStream bos=null;
try{
//1.提供读入,写出的文件
File file1=new File(src);
File file2=new File(dest);
//2.创建相应的节点
FileInputStream fis=new FileInputStream(file1);
FileOutputStream fos=new FileOutputStream(file2);
//3.缓冲流的对象
bis=new BufferedInputStream(fis);
bos=new BufferedOutputStream(fos);
//4.具体的实现
byte[] b=new byte[1024];
int len;
while((len=bis.read(b))!=-1){
bos.write(b, 0, len);
bos.flush();//刷新一下
}
}catch(Exception e){
e.printStackTrace();
}finally{
if(bos!=null){
try {
bos.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
if(bis!=null){
try {
bis.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
}
//字符流的缓冲流的使用 读写功能
@Test
public void test3(){
BufferedReader br=null;
BufferedWriter bw=null;
try{
//
File file=new File("C:\\Users\\Administrator\\Desktop\\1.docx");
File file1=new File("C:\\Users\\Administrator\\Desktop\\6.docx");
//
FileReader fr=new FileReader(file);
FileWriter fw=new FileWriter(file1);
//字符流的缓冲流的对象就有了
br=new BufferedReader(fr);
bw=new BufferedWriter(fw);
String str;
//一读读一行
while((str=br.readLine())!=null){
//System.out.println(str);
bw.write(str);
bw.newLine();
bw.flush();
}
}catch(Exception e){
e.printStackTrace();
}finally{
if(bw!=null){
try {
bw.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
if(br!=null){
try {
br.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
}