Question

Java问题：输入/输出流实现文件复制功能。

Answer 1

public void copyFile(String oldPath, String newPath) {
try {
int bytesum = 0;
int byteread = 0;
File newFile = new File(newPath);
if(newFile.exists()){
return;
}
File oldfile = new File(oldPath);
if (oldfile.exists()) { //文件存在时
InputStream inStream = new FileInputStream(oldPath); //读入原文件
FileOutputStream fs = new FileOutputStream(newPath);
byte[] buffer = new byte[1444];
while ( (byteread = inStream.read(buffer)) != -1) {
bytesum += byteread; //字节数 文件大小
fs.write(buffer, 0, byteread);
}
inStream.close();
}
}
catch (Exception e) {
System.out.println("复制单个文件操作出错");
e.printStackTrace();

}

}