BufferedInputStream和BufferOutputStream的用法。

• BufferedInputStream:他是一个高效的缓冲区类，只提供一个缓冲区，不提供基本的字节流。

• `package cn.zll.demo;
  import java.io.BufferedInputStream;
  import java.io.FileInputStream;
  import java.io.FileNotFoundException;
  import java.io.IOException;
  import java.io.InputStream;
  public class ReadTest {
  public static void main(String[] args) {

  BufferedInputStream buffered = null;try {     buffered=new BufferedInputStream(new FileInputStream("a.txt"));     byte [] b=new byte[1024];     int len=0;     while((len=buffered.read(b))!=-1){         System.out.println(new String(b, 0, len));     }} catch (FileNotFoundException e) {    // TODO Auto-generated catch block    e.printStackTrace();}catch (Exception e) {    // TODO: handle exception    e.printStackTrace();}finally{if(buffered!=null){try {    buffered.close();} catch (IOException e) {    // TODO Auto-generated catch block    e.printStackTrace();}}}

  }
  }
  `

• BufferOutputStream：他是高效缓冲字节输出流。只提供缓冲区。

• ` BufferedOutputStream out=null;
  try {
  out=new BufferedOutputStream(new FileOutputStream(“a.txt”));
  out.write(“hello,world”.getBytes());
  } catch (FileNotFoundException e1) {
  // TODO Auto-generated catch block
  e1.printStackTrace();
  }catch (Exception e) {
  // TODO: handle exception
  e.printStackTrace();
  }finally{

  if(out!=null){    try {        out.close();    } catch (IOException e) {        // TODO Auto-generated catch block        e.printStackTrace();    }    }}`