java文件和目录的增删复制

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");

}

}

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