/*
* FileUtil.java
* Copyright (C) 2007-3-19 <JustinLei@gmail.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
*/
package org.lambdasoft.utils;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.FileReader;
import java.io.InputStream;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;
import java.util.Properties;
import java.util.Random;
import java.util.Set;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
/**
* 文件工具類
*
* @author TangLei <justinlei@gmail.com>
* @date 2009-2-24
*/
public class FileUtil {
private static Log log = LogFactory.getLog(FileUtil.class);
private FileUtil() {}
/**
* 獲取隨機的文件名稱
* @param seed 隨機種子
* @return
*/
public static String getRandomFileName(String seed) {
byte[] ra = new byte[100];
new Random().nextBytes(ra);
StringBuilder build = new StringBuilder("");
for (int i = 0; i < ra.length; i++) {
build.append(Byte.valueOf(ra[i]).toString());
}
String currentDate = Long.valueOf(new Date().getTime()).toString();
seed = seed + currentDate + build.toString();
return EncryptUtils.getMD5ofStr(seed).toLowerCase();
}
/**
* 列出所有當前層的文件和目錄
*
* @param dir 目錄名稱
* @return fileList 列出的文件和目錄
*/
public static File[] ls(String dir) {
return new File(dir).listFiles();
}
/**
* 根據需要創建文件夾
*
* @param dirPath 文件夾路徑
* @param del 存在文件夾是否刪除
*/
public static void mkdir(String dirPath,boolean del) {
File dir = new File(dirPath);
if(dir.exists()) {
if(del)
dir.delete();
else return;
}
dir.mkdirs();
}
/**
* 刪除文件和目錄
*
* @param path
* @throws Exception
*/
public static void rm(String path) throws Exception{
if(log.isDebugEnabled())
log.debug("需要刪除的文件: " + path);
File file = new File(path);
if(!file.exists()) {
if(log.isWarnEnabled())
log.warn("文件<" + path + ">不存在");
return;
}
if(file.isDirectory()) {
File[] fileList = file.listFiles();
if(fileList == null || fileList.length == 0) {
file.delete();
} else {
for (File _file : fileList) {
rm(_file.getAbsolutePath());
}
}
file.delete();
} else {
file.delete();
}
}
/**
* 移動文件
*
* @param source 源文件
* @param target 目標文件
* @param cache 文件緩存大小
* @throws Exception
*/
public static void mv(String source,String target,int cache) throws Exception {
if(source.trim().equals(target.trim()))
return;
byte[] cached = new byte[cache];
FileInputStream fromFile = new FileInputStream(source);
FileOutputStream toFile = new FileOutputStream(target);
while(fromFile.read(cached) != -1) {
toFile.write(cached);
}
toFile.flush();
toFile.close();
fromFile.close();
new File(source).deleteOnExit();
}
/**
* 把屬性文件轉換成Map
*
* @param propertiesFile
* @return
* @throws Exception
*/
public static final Map<String, String> getPropertiesMap(String propertiesFile) throws Exception{
Properties properties = new Properties();
FileInputStream inputStream = new FileInputStream(propertiesFile);
properties.load(inputStream);
Map<String, String> map = new HashMap<String, String>();
Set<Object> keySet = properties.keySet();
for (Object key : keySet) {
map.put((String)key, properties.getProperty((String)key));
}
return map;
}
@SuppressWarnings("unchecked")
public static final Map<String, String> getPropertiesMap(Class clazz,String fileName) throws Exception{
Properties properties = new Properties();
InputStream inputStream = clazz.getResourceAsStream(fileName);
if(inputStream == null)
inputStream = clazz.getClassLoader().getResourceAsStream(fileName);
properties.load(inputStream);
Map<String, String> map = new HashMap<String, String>();
Set<Object> keySet = properties.keySet();
for (Object key : keySet) {
map.put((String)key, properties.getProperty((String)key));
}
return map;
}
/**
* 把屬性文件轉換成Map
*
* @param inputStream
* @return
* @throws Exception
*/
public static final Map<String, String> getPropertiesMap(InputStream inputStream) throws Exception{
Properties properties = new Properties();
properties.load(inputStream);
Map<String, String> map = new HashMap<String, String>();
Set<Object> keySet = properties.keySet();
for (Object key : keySet) {
map.put((String)key, properties.getProperty((String)key));
}
return map;
}
/**
* 把文本文件轉換成String
*
* @param fullPath
* @return
* @throws Exception
*/
public static String readFile(String fullPath) throws Exception{
BufferedReader reader = new BufferedReader(new FileReader(fullPath));
if(reader == null)
return null;
StringBuilder builder = new StringBuilder("");
String line = null;
while((line = reader.readLine()) != null) {
builder.append(line + "\n");
}
return builder.toString();
}
/**
* 獲取資源文件流
*
* @param clazz
* @param name
* @return
*/
@SuppressWarnings("unchecked")
public static InputStream getResourceAsStream(Class clazz,String name) {
try {
InputStream inputStream = clazz.getResourceAsStream(name);
if(inputStream == null)
inputStream = clazz.getClassLoader().getResourceAsStream(name);
return inputStream;
} catch (Exception e) {
if(log.isWarnEnabled())
log.warn("獲取資源文件失敗", e);
return null;
}
}
}