package liuer;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;

public class CopyTest {

    public static void main(String[] args) {    
        
    }
//复制文件,
public static void copy(String src,String dest) throws IOException{
    //1.创建两个流
    File f=new File(dest);
    if(!f.exists()){
        f.createNewFile();
    }
FileInputStream fis=new FileInputStream(src);
FileOutputStream fos=new FileOutputStream(f);
//2.边读边写
//方法一
//int a =-1;
//while((a=fis.read())!=-1){
//    fos.write(a);
//}

//方法二
//byte[]b=new byte[fis.available()];
//fis.read(b);
//fos.write(b);

//方法三
byte[]b=new byte[8192];
int size=-1;
while((size=fis.read(b))!=-1){
    fos.write(b,0,size);
}
    //3.关闭两个流
fis.close();
fos.close();    
}    
}