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FileBufferedTest.java
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112 lines (91 loc) · 2.87 KB
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package IO;
import org.junit.Test;
import java.io.*;
public class FileBufferedTest {
@Test
public void testBuffered(){
FileInputStream fis = null;
FileOutputStream fos = null;
BufferedInputStream bis = null;
BufferedOutputStream bos = null;
try {
File file1 = new File("香港图书馆.jpeg");
File file2 = new File("香港图书馆buffered.jpeg");
fis = new FileInputStream(file1);
fos = new FileOutputStream(file2);
bis = new BufferedInputStream(fis);
bos = new BufferedOutputStream(fos);
byte[] buffer = new byte[10];
int len;
while ((len = bis.read(buffer)) != -1){
bos.write(buffer,0,len);
}
} catch (IOException e) {
e.printStackTrace();
} finally {
if(bis != null){
try {
bis.close();
} catch (IOException e) {
e.printStackTrace();
}
}
if(bos != null){
try {
bos.close();
} catch (IOException e) {
e.printStackTrace();
}
}
// fis.close();
// fos.close();
}
}
public void copyFile1(String srcPath,String destPath){
FileInputStream fis = null;
FileOutputStream fos = null;
BufferedInputStream bis = null;
BufferedOutputStream bos = null;
try {
File file1 = new File(srcPath);
File file2 = new File(destPath);
fis = new FileInputStream(file1);
fos = new FileOutputStream(file2);
bis = new BufferedInputStream(fis);
bos = new BufferedOutputStream(fos);
byte[] buffer = new byte[1024];
int len;
while ((len = bis.read(buffer)) != -1){
bos.write(buffer,0,len);
}
} catch (IOException e) {
e.printStackTrace();
} finally {
if(bis != null){
try {
bis.close();
} catch (IOException e) {
e.printStackTrace();
}
}
if(bos != null){
try {
bos.close();
} catch (IOException e) {
e.printStackTrace();
}
}
// fis.close();
// fos.close();
}
}
@Test
public void test1(){
long start = System.currentTimeMillis();
String srcPath = "香港图书馆.jpeg";
String destPath = "香港图书馆testBuffered.jpeg";
copyFile1(srcPath,destPath);
long end = System.currentTimeMillis();
System.out.println("复制所用的时间为：" + (end - start));//28
}
}