递归
package filetrs;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.util.List;
/**
* @program: springboot-demo
* @description:
* @Author: dongman
* @create: 2021-05-29 11:46
**/
public class FileIo {
final static String targetPath = "D:\\Zfile\\targetPath\\"; //目标路径
public static void main(String[] args) {
copyDir("D:\\Download\\originPath");
}
public static void copyFile (String fileName){
try {
int bytesum = 0; //累计读取到的字节数
int byteread = 0; //单次读取到的 字节数
File oldfile = new File(fileName);
if (oldfile.exists()) { //文件存在时
InputStream inStream = new FileInputStream(fileName); //读入原文件
FileOutputStream fs = new FileOutputStream(targetPath+ oldfile.getName());
byte[] buffer = new byte[1444];
while ( (byteread = inStream.read(buffer)) != -1) {
bytesum += byteread; //字节数 文件大小
// System.out.println(bytesum);
fs.write(buffer, 0, byteread);
}
fs.close();
inStream.close();
System.out.println("文件"+oldfile.getName()+"复制完毕！");
}
}
catch (Exception e) {
System.out.println("复制单个文件操作出错");
e.printStackTrace();
}
}
public static void copyDir(String sourcePath){
File file = new File(sourcePath);
if (file.isDirectory()) {
String[] fileList = file.list();
for (String s : fileList) {
String str = sourcePath+"\\"+s;
//System.out.println(str);
copyDir(str);
}
} else {
if (sourcePath.endsWith(".pdf") || sourcePath.endsWith(".PDF")) {
copyFile(sourcePath);
// System.out.println(sourcePath);
}
}
}
}