使用字节流（InputStream、OutputStream）简单完成对文件的复制

文件的复制

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

/**
* 将文件复制到指定的目录
*/
public class CopyFile {

public static void main(String[] args) {
// 将F盘下的test.txt文件复制到D盘
System.out.println("开始复制。。");
copy("F:/test.txt", "D:/test.txt");
System.out.println("复制成功！");
}

public static void copy(String src, String dest) {
// 准备复制源文件和目的地
File srcFile = new File(src);
File destFile = new File(dest);

// 准备输入输出流
InputStream in = null;
OutputStream out = null;

try {
in = new FileInputStream(srcFile);
out = new FileOutputStream(destFile);

byte[] flush = new byte[1024];
int len = -1;

// 边读边写
while ((len = in.read(flush)) != -1) {
out.write(flush, 0, len);
}

} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} finally {

// 关闭原则，先用后关
// 关闭输出流
if (out != null) {
try {
out.close();
} catch (IOException e) {
e.printStackTrace();
}
}

// 关闭输入流
if (in != null) {
try {
in.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}// copy

}