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FileInputOutputStreamTest.java
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99 lines (80 loc) · 2.48 KB
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package IO;
import org.junit.Test;
import java.io.*;
public class FileInputOutputStreamTest {
@Test
public void testFileInputStream() {
FileInputStream fis = null;
FileOutputStream fos = null;
try {
File srcFile = new File("香港图书馆.jpeg");
File destFile = new File("香港图书馆test.jpeg");
fis = new FileInputStream(srcFile);
fos = new FileOutputStream(destFile);
byte[] bytes = new byte[5];
int len;
while ((len = fis.read(bytes)) != -1){
fos.write(bytes,0,len);
}
} catch (IOException e) {
e.printStackTrace();
} finally {
if(fos != null){
try {
fos.close();
} catch (IOException e) {
e.printStackTrace();
}
}
if(fis != null){
try {
fis.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
//指定路径下文件的赋值
public void copyFile(String srcPath,String destPath){
FileInputStream fis = null;
FileOutputStream fos = null;
try {
File srcFile = new File(srcPath);
File destFile = new File(destPath);
fis = new FileInputStream(srcFile);
fos = new FileOutputStream(destFile);
byte[] bytes = new byte[1024];
int len;
while ((len = fis.read(bytes)) != -1){
fos.write(bytes,0,len);
}
} catch (IOException e) {
e.printStackTrace();
} finally {
if(fos != null){
try {
fos.close();
} catch (IOException e) {
e.printStackTrace();
}
}
if(fis != null){
try {
fis.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
@Test
public void test(){
long start = System.currentTimeMillis();
String srcPath = "香港图书馆.jpeg";
String destPath = "香港图书馆test.jpeg";
copyFile(srcPath,destPath);
long end = System.currentTimeMillis();
System.out.println("复制所用的时间为：" + (end - start));//104
}
}