import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;
import java.util.stream.Stream;
/**
* Created by maoyu on 18/6/29.
*/
public class DeleteFilesInDir {
private static int totleDeleteFiles =0;
public static void main(String[] args) {
Path rootPath = Paths.get("/Users/maoyu/Movies/aaaa");
dealWithThePath(rootPath);
System.out.println("finish delete, total delete files:" +totleDeleteFiles);
}
private static void dealWithThePath(Path path) {
boolean thisLevelHasDir =false;
boolean thisLevelHasJpg =false;
try {
Object[] objects = Files.list(path).toArray();
for (Object obj : objects) {
Path subPath = (Path)obj;
if (subPath.toString().endsWith(".jpg")) {
thisLevelHasJpg =true;
continue;
}
boolean isDirectory = Files.isDirectory(subPath);
if (isDirectory) {
thisLevelHasDir =true;
dealWithThePath(subPath);
}
}
// 只有这一层里面没有目录文件，并且存在jpg结尾的图片，说明这个目录里要处理
if (!thisLevelHasDir && thisLevelHasJpg) {
List list =new ArrayList<>();
for (Object obj : objects) {
list.add(obj.toString());
}
Collections.sort(list,new Comparator() {
@Override
public int compare(String o1, String o2) {
if (o1.compareTo(o2)>0)return 1;
else return -1;
}
});
int k=0;
for (String str : list) {
k++;
if (k>3)break;
Path deletePath = Paths.get(str);
Files.delete(deletePath);
totleDeleteFiles++;
}
}
}catch(Exception e) {
e.printStackTrace();
}
}
}