java 文件及目录操作

import java.io.*; ­

public class FileOperate { ­

public FileOperate() { ­

} ­

/** ­

* 新建目录 ­

* @param folderPath String 如 c:/fqf ­

* @return boolean ­

*/ ­

public void newFolder(String folderPath) { ­

try { ­

String filePath = folderPath; ­

filePath = filePath.toString(); ­

java.io.File myFilePath = new java.io.File(filePath); ­

if (!myFilePath.exists()) { ­

myFilePath.mkdir(); ­

} ­

} ­

catch (Exception e) { ­

System.out.println("新建目录操作出错"); ­

e.printStackTrace(); ­

} ­

} ­

/** ­

* 新建文件 ­

* @param filePathAndName String 文件路径及名称 如c:/fqf.txt ­

* @param fileContent String 文件内容 ­

* @return boolean ­

*/ ­

public void newFile(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); ­

resultFile.close(); ­

} ­

catch (Exception e) { ­

System.out.println("新建目录操作出错"); ­

e.printStackTrace(); ­

} ­

} ­

/** ­

* 删除文件 ­

* @param filePathAndName String 文件路径及名称 如c:/fqf.txt ­

* @param fileContent String ­

* @return boolean ­

*/ ­

public void delFile(String filePathAndName) { ­

try { ­

String filePath = filePathAndName; ­

filePath = filePath.toString(); ­

java.io.File myDelFile = new java.io.File(filePath); ­

myDelFile.delete(); ­

} ­

catch (Exception e) { ­

System.out.println("删除文件操作出错"); ­

e.printStackTrace(); ­

} ­

} ­

/** ­

* 删除文件夹 ­

* @param filePathAndName String 文件夹路径及名称 如c:/fqf ­

* @param fileContent String ­

* @return boolean ­

*/ ­

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) { ­

System.out.println("删除文件夹操作出错"); ­

e.printStackTrace(); ­

} ­

} ­

/** ­

* 删除文件夹里面的所有文件 ­

* @param path String 文件夹路径 如 c:/fqf ­

*/ ­

public void delAllFile(String path) { ­

File file = new File(path); ­

if (!file.exists()) { ­

return; ­

} ­

if (!file.isDirectory()) { ­

return; ­

} ­

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 ­

} ­

} ­

} ­

/** ­

* 复制单个文件 ­

* @param oldPath String 原文件路径 如：c:/fqf.txt ­

* @param newPath String 复制后路径 如：f:/fqf.txt ­

* @return boolean ­

*/ ­

public void copyFile(String oldPath, String newPath) { ­

try { ­

int bytesum = 0; ­

int byteread = 0; ­

File oldfile = new File(oldPath); ­

if (oldfile.exists()) { //文件存在时 ­

InputStream inStream = new FileInputStream(oldPath); //读入原文件 ­

FileOutputStream fs = new FileOutputStream(newPath); ­

byte[] buffer = new byte[1444]; ­

int length; ­

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) { ­

System.out.println("复制单个文件操作出错"); ­

e.printStackTrace(); ­

} ­

} ­

/** ­

* 复制整个文件夹内容 ­

* @param oldPath String 原文件路径 如：c:/fqf ­

* @param newPath String 复制后路径 如：f:/fqf/ff ­

* @return boolean ­

*/ ­

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) { ­

System.out.println("复制整个文件夹内容操作出错"); ­

e.printStackTrace(); ­

} ­

} ­

/** ­

* 移动文件到指定目录 ­

* @param oldPath String 如：c:/fqf.txt ­

* @param newPath String 如：d:/fqf.txt ­

*/ ­

public void moveFile(String oldPath, String newPath) { ­

copyFile(oldPath, newPath); ­

delFile(oldPath); ­

} ­

/** ­

* 移动文件到指定目录 ­

* @param oldPath String 如：c:/fqf.txt ­

* @param newPath String 如：d:/fqf.txt ­

*/ ­

public void moveFolder(String oldPath, String newPath) { ­

copyFolder(oldPath, newPath); ­

delFolder(oldPath); ­

} ­

}­