public static void copyFile(String source, String target)throws Exception {
source = source.replace("\\", "/");
target = target.replace("\\", "/");
File source_file =new File(source);
File target_file =new File(target);
FileChannel in =null;
FileChannel out =null;
if (!source_file.exists() || !source_file.isFile()) {
throw new IllegalArgumentException(source_file +"文件不存在！");
}
File parent = target_file.getParentFile();
// 创建目标文件路径文件夹
if (!parent.exists()) {
parent.mkdirs();
}
// 判断目标文件是否存在
if (target_file.exists()) {
target_file.delete();
}
// 创建目标文件
if (!target_file.exists()) {
target_file.createNewFile();
}
FileInputStream inStream =null;
FileOutputStream outStream =null;
try {
inStream =new FileInputStream(source_file);
outStream =new FileOutputStream(target_file);
in = inStream.getChannel();
out = outStream.getChannel();
in.transferTo(0, in.size(), out);
}catch (IOException e) {
e.printStackTrace();
}finally {
inStream.close();
in.close();
outStream.close();
out.close();
}
}
//main 测试
public static void main(String[] args) {
long l = System.currentTimeMillis();
try {
copyFile("D:\\test.txt", "D:\\tmp.txt");
}catch (Exception e) {
e.printStackTrace();
}
System.out.println("------------------");
System.out.println(System.currentTimeMillis()-l);
}
