文件和目录操作的常用方法

package com.xgll.util;????????????????????????????????

/**
?* <p>Title: </p>
?* <p>Description: 主要提供文件和目录操作的一些常用的方法。</p>
?* <p>Copyright: Copyright (c) 2006</p>
?* <p>Company: C-Platform</p>
?* @author wujiaqian
?* @version 1.0
?*/
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.util.StringTokenizer;

public class TestUtil {
???
??? public TestUtil() {
??? }

?????? /**
???? * 新建目录
???? * @param folderPath 目录
???? * @return 返回目录创建后的路径
???? */
??? public String createFolder(String folderPath) {
??????? String txt = folderPath;
??????? try {
??????????? java.io.File myFilePath = new java.io.File(txt);
??????????? txt = folderPath;
??????????? if (!myFilePath.exists()) {
??????????????? myFilePath.mkdir();
??????????? }
??????? }
??????? catch (Exception e) {
???????????
??????? }
??????? return txt;
??? }
???
??? /**
???? * 多级目录创建
???? * @param folderPath 准备要在本级目录下创建新目录的目录路径 例如 c:myf
???? * @param paths 无限级目录参数，各级目录以单数线区分 例如 a|b|c
???? * @return 返回创建文件后的路径 例如 c:myfac
???? */
??? public String createFolders(String folderPath, String paths){
??????? String txts = folderPath;
??????? try{
??????????? String txt;
??????????? txts = folderPath;
??????????? StringTokenizer st = new StringTokenizer(paths,"|");
??????????? for(int i=0; st.hasMoreTokens(); i++){
??????????????????? txt = st.nextToken().trim();
??????????????????? if(txts.lastIndexOf("/")!=-1){
??????????????????????? txts = createFolder(txts+txt);
??????????????????? }else{
??????????????????????? txts = createFolder(txts+txt+"/");???
??????????????????? }
??????????? }
?????? }catch(Exception e){
?????????
?????? }
??????? return txts;
??? }

???
??? /**
???? * 新建文件
???? * @param filePathAndName 文本文件完整绝对路径及文件名
???? * @param fileContent 文本文件内容
???? * @return
???? */
??? public void createFile(String filePathAndName, String fileContent) {
????
??????? try {
??????????? String filePath = filePathAndName;
??????????? filePath = filePath.toString();
??????????? File myFilePath = new File(filePath);
??????????? if (!myFilePath.exists()) {
??????????????? myFilePath.createNewFile();
??????????? }
??????????? FileWriter resultFile = new FileWriter(myFilePath);
??????????? PrintWriter myFile = new PrintWriter(resultFile);
??????????? String strContent = fileContent;
??????????? myFile.println(strContent);
??????????? myFile.close();
??????????? resultFile.close();
??????? }
??????? catch (Exception e) {
??????????
??????? }
??? }

??? /**
???? * 有编码方式的文件创建
???? * @param filePathAndName 文本文件完整绝对路径及文件名
???? * @param fileContent 文本文件内容
???? * @param encoding 编码方式 例如 GBK 或者 UTF-8
???? * @return
???? */
??? public void createFile(String filePathAndName, String fileContent, String encoding) {
????
??????? try {
??????????? String filePath = filePathAndName;
??????????? filePath = filePath.toString();
??????????? File myFilePath = new File(filePath);
??????????? if (!myFilePath.exists()) {
??????????????? myFilePath.createNewFile();
??????????? }
??????????? PrintWriter myFile = new PrintWriter(myFilePath,encoding);
??????????? String strContent = fileContent;
??????????? myFile.println(strContent);
??????????? myFile.close();
??????? }
??????? catch (Exception e) {
??????????
??????? }
??? }

??? /**
???? * 删除文件
???? * @param filePathAndName 文本文件完整绝对路径及文件名
???? * @return Boolean 成功删除返回true遭遇异常返回false
???? */
??? public boolean delFile(String filePathAndName) {
???? boolean flag = false;
??????? try {
??????????? String filePath = filePathAndName;
??????????? File myDelFile = new File(filePath);
??????????? if(myDelFile.exists()){
???????????? myDelFile.delete();
???????????? flag = true;
??????????? }else{
???????????? flag = false;
???
??????????? }
??????? }
??????? catch (Exception e) {
???
??????? }
??????? return flag;
??? }
???

??? /**
???? * 删除文件夹
???? * @param folderPath 文件夹完整绝对路径
???? * @return
???? */
??? public void delFolder(String folderPath) {
??????? try {
??????????? delAllFile(folderPath); //删除完里面所有内容
??????????? String filePath = folderPath;
??????????? filePath = filePath.toString();
??????????? java.io.File myFilePath = new java.io.File(filePath);
??????????? myFilePath.delete(); //删除空文件夹
??????? }
??????? catch (Exception e) {
???
??????? }
??? }
???
???
??? /**
???? * 删除指定文件夹下所有文件
???? * @param path 文件夹完整绝对路径
???? * @return
???? * @return
???? */
??? public boolean delAllFile(String path) {
???? boolean flag = false;
??????? File file = new File(path);
??????? if (!file.exists()) {
??????????? return flag;
??????? }
??????? if (!file.isDirectory()) {
??????????? return flag;
??????? }
??????? String[] tempList = file.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();
??????????? }
??????????? if (temp.isDirectory()) {
??????????????? delAllFile(path+"/"+ tempList[i]);//先删除文件夹里面的文件
??????????????? delFolder(path+"/"+ tempList[i]);//再删除空文件夹
??????????????? flag = true;
??????????? }
??????? }
??????? return flag;
??? }

??? /**
???? * 复制单个文件
???? * @param oldPathFile 准备复制的文件源
???? * @param newPathFile 拷贝到新绝对路径带文件名
???? * @return
???? */
??? public void copyFile(String oldPathFile, String newPathFile) {
??????? try {
??????????? int bytesum = 0;
??????????? int byteread = 0;
??????????? File oldfile = new File(oldPathFile);
??????????? if (oldfile.exists()) { //文件存在时
??????????????? InputStream inStream = new FileInputStream(oldPathFile); //读入原文件
??????????????? FileOutputStream fs = new FileOutputStream(newPathFile);
??????????????? byte[] buffer = new byte[1444];
??????????????? while((byteread = inStream.read(buffer)) != -1){
??????????????????? bytesum += byteread; //字节数 文件大小
??????????????????? System.out.println(bytesum);
??????????????????? fs.write(buffer, 0, byteread);
??????????????? }
??????????????? inStream.close();
??????????? }
??????? }catch (Exception e) {
???
??????? }
??? }
???

??? /**
???? * 复制整个文件夹的内容
???? * @param oldPath 准备拷贝的目录
???? * @param newPath 指定绝对路径的新目录
???? * @return
???? */
??? public void copyFolder(String oldPath, String newPath) {
??????? try {
??????????? new File(newPath).mkdirs(); //如果文件夹不存在 则建立新文件夹
??????????? File a=new File(oldPath);
??????????? String[] file=a.list();
??????????? File temp=null;
??????????? for (int i = 0; i < file.length; i++) {
??????????????? if(oldPath.endsWith(File.separator)){
??????????????????? temp=new File(oldPath+file[i]);
??????????????? }else{
??????????????????? temp=new File(oldPath+File.separator+file[i]);
??????????????? }
??????????????? if(temp.isFile()){
??????????????????? FileInputStream input = new FileInputStream(temp);
??????????????????? FileOutputStream output = new FileOutputStream(newPath + "/" +
??????????????????? (temp.getName()).toString());
??????????????????? byte[] b = new byte[1024 * 5];
??????????????????? int len;
??????????????????? while ((len = input.read(b)) != -1) {
??????????????????????? output.write(b, 0, len);
??????????????????? }
??????????????????? output.flush();
??????????????????? output.close();
??????????????????? input.close();
??????????????? }
??????????????? if(temp.isDirectory()){//如果是子文件夹
??????????????????? copyFolder(oldPath+"/"+file[i],newPath+"/"+file[i]);
??????????????? }
??????????? }
??????? }catch (Exception e) {
???
??????? }
??? }

??? /**
???? * 移动文件
???? * @param oldPath
???? * @param newPath
???? * @return
???? */
??? public void moveFile(String oldPath, String newPath) {
??????? copyFile(oldPath, newPath);
??????? delFile(oldPath);
??? }
???

??? /**
???? * 移动目录
???? * @param oldPath
???? * @param newPath
???? * @return
???? */
??? public void moveFolder(String oldPath, String newPath) {
??????? copyFolder(oldPath, newPath);
??????? delFolder(oldPath);
??? }

?/**
???? * 读取文本文件内容
???? * @param filePathAndName 带有完整绝对路径的文件名
???? * @param encoding 文本文件打开的编码方式
???? * @return 返回文本文件的内容
???? */
??? public String readTxt(String filePathAndName,String encoding) throws IOException{
???? encoding = encoding.trim();
???? StringBuffer str = new StringBuffer("");
???? String st = "";
???? try{
????? FileInputStream fs = new FileInputStream(filePathAndName);
????? InputStreamReader isr;
????? if(encoding.equals("")){
?????? isr = new InputStreamReader(fs);
????? }else{
?????? isr = new InputStreamReader(fs,encoding);
????? }
????? BufferedReader br = new BufferedReader(isr);
????? try{
?????? String data = "";
?????? while((data = br.readLine())!=null){
???????? str.append(data+" ");
?????? }
????? }catch(Exception e){
?????? str.append(e.toString());
????? }
????? st = str.toString();
???? }catch(IOException es){
????? st = "";
???? }
???? return st;????
??? }
??
}

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