JAVA文件操作类和文件夹的操作代码实例,包括读取文本文件内容, 新建目录,多级目录创建,新建文件,有编码方式的文件创建, 删除文件,删除文件夹,删除指定文件夹下所有文件, 复制单个文件,复制整个文件夹的内容,移动文件,移动目录等。。。非常不错的哟!
package com.gamvan.tools;
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 FileOperate {
private String message;
public FileOperate() {
}
/**
* 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;
}
/**
* 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) {
message = " 创建目录操作出错 " ;
}
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){
message = " 创建目录操作出错! " ;
}
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) {
message = " 创建文件操作出错 " ;
}
}
/**
* 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) {
message = " 创建文件操作出错 " ;
}
}
/**
* 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 bea = false ;
try {
String filePath = filePathAndName;
File myDelFile = new File(filePath);
if (myDelFile.exists()){
myDelFile.delete();
bea = true ;
} else {
bea = false ;
message = (filePathAndName + "
删除文件操作出错 " );
}
}
catch (Exception e) {
message = e.toString();
}
return bea;
}
/**
* 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) {
message = ( " 删除文件夹操作出错 " );
}
}
/**
* 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 bea = false ;
File file = new File(path);
if ( ! file.exists()) {
return bea;
}
if ( ! file.isDirectory()) {
return bea;
}
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
bea = true ;
}
}
return bea;
}
/**
* 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) {
message = ( " 复制单个文件操作出错 " );
}
}
/**
* 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) {
message = " 复制整个文件夹内容操作出错 " ;
}
}
/**
* 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);
}
public String getMessage(){
return this .message;
}
}