Sample sharing of Java copy files and Java move files

package com.famous.dark.util;
import java.io.File;
import java.io.FileFilter;
public class MyFileFilter implements FileFilter {
 public boolean accept(File file) {
  String fileName = file.getName().toLowerCase();
  if (fileName.endsWith(".jar") || file.isDirectory()) {
   return true;
  }
  return false;
 }
}

package com.famous.dark.util;
import java.io.File;
import java.io.IOException;
import org.apache.commons.io.FileUtils;
import org.apache.commons.io.FilenameUtils;

public class JarCollectionUtil {
 public String collectionJar(File baseFile, String targetFilePath) throws Exception {
  File targetDir = new File(targetFilePath);
  if (!targetDir.exists()) {
   targetDir.mkdir();
  }
  if (baseFile.exists() && baseFile.isDirectory()) {
   File[] files = baseFile.listFiles(new MyFileFilter());
   for (File file : files) {
    if (file.isDirectory()) {
     collectionJar(file, targetFilePath);
    } else {
     File targetFile = new File(targetFilePath + "\" + file.getName());
     FileUtils.copyFile(file, targetFile);
    }
   }
   return "success";
  } else {
   return " The file path does not exist ";
  }
 }
 public static void main(String[] args) throws Exception {
  JarCollectionUtil collectionUtil = new JarCollectionUtil();
  collectionUtil.collectionJar(new File("F:\JAR\lucene-4.3.1"), "F:\JAR\LUCENE");
 }
}