java文件和目录的增删复制

在使用java进行开发时常常会用到文件和目录的增删复制等方法。我写了一个小工具类。和大家分享，希望大家指正：

package com.wangpeng.utill;

import java.io.file;
import java.io.fileinputstream;
import java.io.fileoutputstream;
import java.io.filewriter;
import java.io.inputstream;
import java.io.printwriter;

/**
 * @author wangpeng
 * 
 */
public class tooloffile {

 /**
 * 创建目录
 * 
 * @param folderpath
 *      目录目录
 * @throws exception
 */
 public static void newfolder(string folderpath) throws exception {
 try {
  java.io.file myfolder = new java.io.file(folderpath);
  if (!myfolder.exists()) {
  myfolder.mkdir();
  }
 } catch (exception e) {
  throw e;
 }
 }

 /**
 * 创建文件
 * 
 * @param filepath
 *      文件路径
 * @throws exception
 */
 public static void newfile(string filepath) throws exception {
 try {
  file myfile = new file(filepath);
  if (!myfile.exists()) {
  myfile.createnewfile();
  }
 } catch (exception e) {
  throw e;
 }
 }

 /**
 * 创建文件，并写入内容
 * 
 * @param filepath
 *      文件路径
 * @param filecontent
 *      被写入的文件内容
 * @throws exception
 */
 public static void newfile(string filepath, string filecontent)
  throws exception {
 // 用来写入字符文件的便捷类
 filewriter filewriter = null;
 // 向文本输出流打印对象的格式化表示形式,使用指定文件创建不具有自己主动行刷新的新
 printwriter printwriter = null;
 try {
  file myfile = new file(filepath);
  if (!myfile.exists()) {
  myfile.createnewfile();
  }

  filewriter = new filewriter(myfile);
  printwriter = new printwriter(filewriter);

  printwriter.print(filecontent);
  printwriter.flush();
 } catch (exception e) {
  throw e;
 } finally {
  if (printwriter != null) {
  printwriter.close();
  }
  if (filewriter != null) {
  filewriter.close();
  }
 }
 }

 /**
 * 复制文件
 * 
 * @param oldpath
 *      被拷贝的文件
 * @param newpath
 *      复制到的文件
 * @throws exception
 */
 public static void copyfile(string oldpath, string newpath)
  throws exception {
 inputstream instream = null;
 fileoutputstream outstream = null;
 try {
  int byteread = 0;
  file oldfile = new file(oldpath);
  // 文件存在时
  if (oldfile.exists()) {
  instream = new fileinputstream(oldfile);
  outstream = new fileoutputstream(newpath);

  byte[] buffer = new byte[1444];
  while ((byteread = instream.read(buffer)) != -1) {
   outstream.write(buffer, 0, byteread);
  }
  outstream.flush();
  }
 } catch (exception e) {
  throw e;
 } finally {
  if (outstream != null) {
  outstream.close();
  }
  if (instream != null) {
  instream.close();
  }
 }
 }

 /**
 * 复制文件
 * @param instream 被拷贝的文件的输入流
 * @param newpath 被复制到的目标
 * @throws exception
 */
 public static void copyfile(inputstream instream, string newpath)
  throws exception {
 fileoutputstream outstream = null;
 try {
  int byteread = 0;
  outstream = new fileoutputstream(newpath);
  byte[] buffer = new byte[1444];
  while ((byteread = instream.read(buffer)) != -1) {
  outstream.write(buffer, 0, byteread);
  }
  outstream.flush();
 } catch (exception e) {
  throw e;
 } finally {
  if (outstream != null) {
  outstream.close();
  }
  if (instream != null) {
  instream.close();
  }
 }
 }

 /**
 * 复制目录
 * 
 * @param oldpath
 *      被复制的目录路径
 * @param newpath
 *      被复制到的目录路径
 * @throws exception
 */
 public static void copyfolder(string oldpath, string newpath)
  throws exception {
 try {
  (new file(newpath)).mkdirs(); // 假设目录不存在 则建立新目录
  file a = new file(oldpath);
  string[] file = a.list();
  file tempin = null;
  for (int i = 0; i < file.length; i++) {
  if (oldpath.endswith(file.separator)) {
   tempin = new file(oldpath + file[i]);
  } else {
   tempin = new file(oldpath + file.separator + file[i]);
  }

  if (tempin.isfile()) {
   copyfile(tempin.getabsolutepath(),
    newpath + "/" + (tempin.getname()).tostring());
  } else if (tempin.isdirectory()) {// 假设是子目录
   copyfolder(oldpath + "/" + file[i], newpath + "/" + file[i]);
  }
  }
 } catch (exception e) {
  throw e;
 }
 }

 /**
 * 删除文件
 * 
 * @param filepathandname
 */
 public static void delfilex(string filepathandname) {
 file mydelfile = new file(filepathandname);
 mydelfile.delete();
 }

 /**
 * 删除目录
 * 
 * @param path
 */
 public static void delforder(string path) {
 file deldir = new file(path);
 if (!deldir.exists()) {
  return;
 }
 if (!deldir.isdirectory()) {
  return;
 }
 string[] templist = deldir.list();
 file temp = null;
 for (int i = 0; i < templist.length; i++) {
  if (path.endswith(file.separator)) {
  temp = new file(path + templist[i]);
  } else {
  temp = new file(path + file.separator + templist[i]);
  }

  if (temp.isfile()) {
  temp.delete();
  } else if (temp.isdirectory()) {
  // 删除完里面全部内容
  delforder(path + "/" + templist[i]);
  }
 }
 deldir.delete();
 }

 public static void main(string[] args) {
 string oldpath = "f:/test/aaa/";
 string newpath = "f:/test/bbb/";

 try {
  // tooloffile.newfolder("f:/test/hello/");
  // tooloffile.newfile("f:/test/hello/world.txt","我爱你，the world！
");
  tooloffile.copyfolder(oldpath, newpath);
  // tooloffile.delforder("f:/test/hello");
 } catch (exception e) {
  e.printstacktrace();
 }
 system.out.println("ok");
 }
}

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。