1.查找目录下所有包含关键字的文件名

import java.io.File;
import java.util.Scanner;

public class TestDemo {
public static String key;

public static void showFile( File rootFile){
File[] files = rootFile.listFiles();
if (files == null){
return;
}
for (File f: files){
if (f.isDirectory()){
showFile(f);
}
else if(f.getName().contains(key)){
System.out.println(f.getPath());
}
}
}
}

public static void main(String[] args) {
// TODO Auto-generated method stub
System.out.println("input dir:");
Scanner scan = new Scanner(System.in);
String dir = scan.nextLine();
System.out.println("input key:");
key = scan.nextLine();

File rootFile = new File(dir);
showFile(rootFile);
}

}