import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
/*
* 文件复制方式(字节流),一共4个方式
* 1.字节流读写单个字节 125250ms
* 2.字节流读写字节数组 193ms
* 3.字节流缓冲区流读写单个字节 1210ms
* 4.字节流缓冲区流读写字节数组 73ms
*/
public class Copy_3 {
public static void main(String[] args) throws IOException {
long s=System.currentTimeMillis();
copy_4(new File("d:\\NavicatforMySQL.zip"), new File("d:\\demo\\NavicatforMySQL.zip"));
long e=System.currentTimeMillis();
System.out.println(e-s);
}
//1.字节流读写单个字节
public static void copy_1(File src,File desc) throws IOException{
FileInputStream fis=new FileInputStream(src);
FileOutputStream fos=new FileOutputStream(desc);
int len=0;
while((len=fis.read())!=-1){
fos.write(len);
}
fos.close();
fis.close();
}
//2.字节流读写字节数组
public static void copy_2(File src,File desc)throws IOException{
FileInputStream fis=new FileInputStream(src);
FileOutputStream fos=new FileOutputStream(desc);
int len=0;
byte[] bytes=new byte[1024];
while((len=fis.read(bytes))!=-1){
fos.write(bytes,0,len);
}
fos.close();
fis.close();
}
//3.字节流缓冲区流读写单个字节
public static void copy_3(File src,File desc)throws IOException{
BufferedInputStream bis=new BufferedInputStream(new FileInputStream(src));
BufferedOutputStream bos=new BufferedOutputStream(new FileOutputStream(desc));
int len=0;
while((len=bis.read())!=-1){
bos.write(len);
}
bos.close();
bis.close();
}
//4.字节流缓冲区流读写字节数组
public static void copy_4(File src,File desc)throws IOException{
BufferedInputStream bis=new BufferedInputStream(new FileInputStream(src));
BufferedOutputStream bos=new BufferedOutputStream(new FileOutputStream(desc));
int len=0;
byte[] bytes=new byte[1024];
while((len=bis.read(bytes))!=-1){
bos.write(bytes,0,len);
}
bos.close();
bis.close();
}
}
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
/*
* 文件复制方式(字节流),一共4个方式
* 1.字节流读写单个字节 125250ms
* 2.字节流读写字节数组 193ms
* 3.字节流缓冲区流读写单个字节 1210ms
* 4.字节流缓冲区流读写字节数组 73ms
*/
public class Copy_3 {
public static void main(String[] args) throws IOException {
long s=System.currentTimeMillis();
copy_4(new File("d:\\NavicatforMySQL.zip"), new File("d:\\demo\\NavicatforMySQL.zip"));
long e=System.currentTimeMillis();
System.out.println(e-s);
}
//1.字节流读写单个字节
public static void copy_1(File src,File desc) throws IOException{
FileInputStream fis=new FileInputStream(src);
FileOutputStream fos=new FileOutputStream(desc);
int len=0;
while((len=fis.read())!=-1){
fos.write(len);
}
fos.close();
fis.close();
}
//2.字节流读写字节数组
public static void copy_2(File src,File desc)throws IOException{
FileInputStream fis=new FileInputStream(src);
FileOutputStream fos=new FileOutputStream(desc);
int len=0;
byte[] bytes=new byte[1024];
while((len=fis.read(bytes))!=-1){
fos.write(bytes,0,len);
}
fos.close();
fis.close();
}
//3.字节流缓冲区流读写单个字节
public static void copy_3(File src,File desc)throws IOException{
BufferedInputStream bis=new BufferedInputStream(new FileInputStream(src));
BufferedOutputStream bos=new BufferedOutputStream(new FileOutputStream(desc));
int len=0;
while((len=bis.read())!=-1){
bos.write(len);
}
bos.close();
bis.close();
}
//4.字节流缓冲区流读写字节数组
public static void copy_4(File src,File desc)throws IOException{
BufferedInputStream bis=new BufferedInputStream(new FileInputStream(src));
BufferedOutputStream bos=new BufferedOutputStream(new FileOutputStream(desc));
int len=0;
byte[] bytes=new byte[1024];
while((len=bis.read(bytes))!=-1){
bos.write(bytes,0,len);
}
bos.close();
bis.close();
}
}