package com.github.zangxiaoqiang.common.file;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.UnsupportedEncodingException;
public class FileUtil {
/**
* Delete file according to a path.
*
* @param path
* - file path
* @return - true if delete successfully, otherwise false.
*/
public static boolean deleteFile(String path) {
File file = new File(path);
return deleteFile(file);
}
/**
* Delete file.
*
* @param file
* - deleted file
* @return - true if delete successfully, otherwise false.
*/
public static boolean deleteFile(File file) {
boolean flag = false;
if (file.exists() && file.isFile()) {
file.delete();
flag = true;
}
return flag;
}
/**
* Delete all files in the directory except folders. Directory may end with
* a "\" or not.
*
* @param path
* - directory path
* @return - true if successfully, otherwise false.
*/
public static boolean clearFolder(String path) {
boolean flag = true;
File dirFile = new File(path);
if (!dirFile.isDirectory()) {
return flag;
}
File[] files = dirFile.listFiles();
for (File file : files) {
// Delete files.
if (file.isFile()) {
flag = deleteFile(file);
if (!flag) {
break;
}
}
}
return flag;
}
/**
* Delete all files and folders in the directory. Directory may end with a
* "\" or not.
*
* @param path
* - directory path
* @return - true if successfully, otherwise false.
*/
public static boolean deleteFolder(String path) {
boolean flag = true;
File dirFile = new File(path);
if (!dirFile.isDirectory()) {
return flag;
}
File[] files = dirFile.listFiles();
for (File file : files) {
// Delete file.
if (file.isFile()) {
flag = deleteFile(file);
} else if (file.isDirectory()) {// Delete folder
flag = deleteFolder(file.getAbsolutePath());
}
if (!flag) {
break;
}
}
flag = dirFile.delete();
return flag;
}
/**
* 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 static void copyFile(String oldPath, String newPath) {
try {
int bytesum = 0;
int byteread = 0;
File oldfile = new File(oldPath);
File newFile = new File(newPath);
if (!newFile.exists()) {
newFile.createNewFile();
}
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];
while ((byteread = inStream.read(buffer)) != -1) {
bytesum += byteread; // 字节数 文件大小
System.out.println(bytesum);
fs.write(buffer, 0, byteread);
}
fs.flush();
fs.close();
inStream.close();
}
} catch (Exception e) {
System.out.println("复制单个文件操作出错 ");
e.printStackTrace();
}
}
/**
* Copy folders.
*
* @param oldPath
* @param newPath
*/
public static void copyFolder(String oldPath, String newPath) {
File oldFile = new File(oldPath);
if (!oldFile.exists()) {
return;
}
try {
(new File(newPath)).mkdirs();
String[] file = oldFile.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()) {
copyFolder(oldPath + "/" + file[i], newPath + "/" + file[i]);
}
}
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* Create a file according to the absolute path.
*
* @param path
* - the absolute path
* @return - true if successfully
*/
public static boolean createFile(String path) {
File file = new File(path);
if (file.exists()) {
return true;
}
try {
file.createNewFile();
} catch (IOException e) {
File parent = new File(file.getParent());
if (!parent.exists()) {
createDirectory(file.getParent());
}
try {
file.createNewFile();
} catch (IOException e1) {
return false;
}
}
return true;
}
/**
* Create a directory according to the path.
*
* @param path
* - the absolute path.
* @return - true if successful, or throw a {@code IllegalArgumentException}
*/
public static boolean createDirectory(String path) {
File file = new File(path);
if (file.exists()) {
return true;
}
if (file.mkdirs()) {
return true;
} else {
throw new IllegalArgumentException("Error when create directory: "
+ path);
}
}
/**
* 读取UTF-8格式文本文件
*
* @param tempalteFile
* @return
*/
public static String readFromLocal(File tempalteFile) {
try {
InputStream inputStream = new FileInputStream(tempalteFile);
BufferedReader reader = new BufferedReader(new InputStreamReader(
inputStream, "utf-8"));
String line = reader.readLine();
StringBuffer sb = new StringBuffer();
while (line != null) {
sb.append(line);
sb.append("\n");
line = reader.readLine();
}
reader.close();
inputStream.close();
return sb.toString();
} catch (FileNotFoundException e) {
throw new IllegalArgumentException(tempalteFile + " Path invalid");
} catch (UnsupportedEncodingException e) {
// ignore;
} catch (IOException e) {
// ignore;
}
return "";
}
/**
* 写入UTF-8格式文本文件
*
* @param filePath
* @param content
*/
public static void wrireToLocal(String filePath, String content) {
File file = new File(filePath);
if (!file.exists()) {
createFile(filePath);
}
try {
OutputStream out = new FileOutputStream(file);
OutputStreamWriter writer = new OutputStreamWriter(out, "utf-8");
writer.write(content);
writer.close();
out.close();
} catch (FileNotFoundException e) {
// ignore;
} catch (UnsupportedEncodingException e) {
// ignore;
} catch (IOException e) {
// ignore;
}
}
/**
* 校验文件夹名
* @param fileName
* @return
*/
public static boolean isValidFileName(String fileName) {
if (fileName == null || fileName.length() > 255)
return false;
else
return fileName
.matches("[^\\s\\\\/:\\*\\?\\\"<>\\|](\\x20|[^\\s\\\\/:\\*\\?\\\"<>\\|])*[^\\s\\\\/:\\*\\?\\\"<>\\|\\.]$");
}
}