package Excr19;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
/*
字节流 媒体文件
思路：
1.用字节读取流对象和图片关联
2.用字节写入流对象创建一个图片文件用于储存获取到的图片数据
3.通过循环读写，完成数据的储存
4.关闭资源
只是本个磁盘进行拷贝
*/
public class Demo9 {
/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
FileOutputStream fileOutputStream=null;
FileInputStream fileInputStream=null;
try {
fileOutputStream =new FileOutputStream("C:\\Taylor Swift - You Belong With Me1.mp3");
fileInputStream=new FileInputStream("C:\\Taylor Swift - You Belong With Me.mp3");
byte [] buf=new byte[1024*5];
int len=0;
while ((len=fileInputStream.read(buf))!=-1) {
fileOutputStream.write(buf,0,len);
}
} catch (IOException e ) {
throw new RuntimeException("复制文件失败");
// TODO: handle exception
}
finally{
try{
if(fileInputStream!=null);
fileInputStream.close();
}
catch (IOException e ){
throw new RuntimeException("读取文件失败");
}
}
try{
if(fileInputStream!=null);
fileInputStream.close();
}
catch (IOException e ){
throw new RuntimeException("写入数据失败");
}
}
}
package Excr19;
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.BufferedWriter;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
public class Demo10 {
/**map3的复制：通过缓冲区
* 1.定义数组
* 2.定义指针
* 3.定义计数器
* @param args
* @throws IOException
*/
public static void main(String[] args) throws IOException {
// TODO Auto-generated method stub
long start=System.currentTimeMillis();
copy_1();
long end=System.currentTimeMillis();
System.out.println((end-start)+"毫秒");
}
//通过字节流的缓冲区完成复制
public static void copy_1() throws IOException {
BufferedInputStream bufferedInputStream=new BufferedInputStream(new FileInputStream("C:\\Taylor Swift - Love Story.mp3"));
BufferedOutputStream bufferedOutputStream=new BufferedOutputStream(new FileOutputStream("D:\\Taylor Swift - Love Story1.mp3"));
int by=0;
while ((by=bufferedInputStream.read())!=-1) {
bufferedOutputStream.write(by);
}
bufferedOutputStream.close();
bufferedInputStream.close();
}
}
package Excr19;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
public class Demo13 {
/**
* @param args
* @throws IOException
*/
public static void main(String[] args) throws IOException {
// TODO Auto-generated method stub
//获取键盘录入对象
InputStream inputStream=System.in;
//将字节流对象转成字符流对象，使用转换率，inputStreamReader
InputStreamReader inputStreamReader=new InputStreamReader(inputStream);
//为了提高效率，将字符流串进行缓冲区技术高效操作，使用BufferedReader
BufferedReader bufferedReader=new BufferedReader(inputStreamReader);
String lineString=null;
while ((lineString=bufferedReader.readLine())!=null) {
if ("over".equals(lineString)) {
break;
}
System.out.println(lineString.toUpperCase());
}
bufferedReader.close();
}
}
package Excr19;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
public class Demo14 {
/**
* 字符转字节
* 录得时候是字符，但是存的时候是字节
* @param args
* @throws IOException
*/
public static void main(String[] args) throws IOException {
// TODO Auto-generated method stub
InputStream inputStream=System.in;
InputStreamReader inputStreamReader=new InputStreamReader(inputStream);
OutputStream out=System.out;
BufferedReader bufferedReader=new BufferedReader(inputStreamReader);
OutputStreamWriter outputStreamWriter=new OutputStreamWriter(out);
BufferedReader bufferedReader2=new BufferedReader(outputStreamWriter);
String lineString=null;
while((lineString=bufferedReader.readLine())!=null){
if ("over".equals(lineString)) {
break;
outputStreamWriter.write(lineString.toUpperCase()+"\r\n");
outputStreamWriter.flush();
}
}
bufferedReader.close();
}
}
详情请查看：http://edu.csdn.net/heima