Java 获取文件名 输入输出

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1，获取文件夹下所有文件名。2，将符合要求的文件复制出来。package com;import java.io.File;import java.io.FileInputStream;import java.io.FileOutputStream;public class FileName {/*** @param args* @throws Exception */public static void fileTest(File file, String temp) {// 是文件的情况if (file.isFile()) {System.out.print("文件 :" + file.getName() + "\t");}// 是目录的情况else {File[] files = file.listFiles();for (File fileTemp : files) {if (fileTemp.isDirectory()) {System.out.println(temp + "目录 :" + fileTemp.getName()+ "\t");fileTest(fileTemp, temp + "\t");} else {if (fileTemp.getName().length() == 11) {System.out.println(temp + "文件 :"+ fileTemp.getName().substring(0, 5) + "\t");System.out.println(fileTemp.getName().substring(7));String fileName = fileTemp.getName().substring(0, 5)+ fileTemp.getName().substring(7);System.out.println(fileName);String c = fileTemp.getParent();File mm = new File("D:\\" + fileName);   //复制文件后要放到哪个目录。File mm2 = new File("D:\\www\\" + fileName);   //留在的文件夹。if (fileName.equals("ABCDE.txt")) {if (fileTemp.renameTo(mm)) {System.out.println("修改成功!");FileName fs = new FileName();try {fs.CopyFile(mm, mm2);} catch (Exception e) {// TODO Auto-generated catch blocke.printStackTrace();}} else {System.out.println("修改失败");}}}}}}}public void CopyFile(File in, File out) throws Exception {FileInputStream fis  = new FileInputStream(in);FileOutputStream fos = new FileOutputStream(out);byte[] buf = new byte[1024];int i = 0;while((i=fis.read(buf))!=-1) {fos.write(buf, 0, i);}fis.close();fos.close();}public static void main(String[] args) {// newFile中输入文件夹路径 new File(path);File file = new File("D:/www");    //上来要进去的文件夹。fileTest(file, "");}}