OutputStream,InputStream的用法
复制文件(copy)
package worktext;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
public class TestCopy {
public static void main(String[] args) {
long start=System.currentTimeMillis();
OutputStream file=null;
InputStream file1=null;
try {
file=new FileOutputStream("H:\\2.txt");
file1=new FileInputStream("H:\\1.txt");
byte []byt=new byte[50];
while(file1.read(byt)>0) {
file.write(byt);
}
long end=System.currentTimeMillis();
System.out.println("拷贝时间为:"+(end-start)+"(毫秒)");
} catch (FileNotFoundException e) {
System.out.println("文件没有找到"+e.getMessage());
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
finally {
if(file!=null) {
try {
file.close();
} catch (IOException e) {
}
}
if(file1!=null) {
try {
file1.close();
} catch (IOException e) {
}
}
}
}
}