复制代码 代码如下:
package com.pzq.io;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.io.StringReader;
import java.nio.charset.Charset;
import java.util.ArrayList;
import java.util.List;

import org.apache.commons.io.FileUtils;

/**
* 文件操作工具类
* @version 1.0 2013/07/16
*
*/
public class FileUtil {

/**
* 复制文件或者目录,复制前后文件完全一样。
* @param resFilePath 源文件路径
* @param distFolder 目标文件夹
* @IOException 当操作发生异常时抛出
*/
public static void copyFile(String resFilePath, String distFolder)
throws IOException {
File resFile = new File(resFilePath);
File distFile = new File(distFolder);
if (resFile.isDirectory()) { // 目录时
FileUtils.copyDirectoryToDirectory(resFile, distFile);
} else if (resFile.isFile()) { // 文件时
// FileUtils.copyFileToDirectory(resFile, distFile, true);
FileUtils.copyFileToDirectory(resFile, distFile);
}
}


/**
* 删除一个文件或者目录
* @param targetPath 文件或者目录路径
* @IOException 当操作发生异常时抛出
*/
public static void deleteFile(String targetPath) throws IOException {
File targetFile = new File(targetPath);
if (targetFile.isDirectory()) {
FileUtils.deleteDirectory(targetFile);
} else if (targetFile.isFile()) {
targetFile.delete();
}
}

/**
* 将字符串写入指定文件(当指定的父路径中文件夹不存在时，会最大限度去创建，以保证保存成功！)
*
* @param res 原字符串
* @param filePath 文件路径
* @return 成功标记
* @throws IOException
*/
public static boolean string2File(String res, String filePath) throws IOException {
boolean flag = true;
BufferedReader bufferedReader = null;
BufferedWriter bufferedWriter = null;
try {
File distFile = new File(filePath);
if (!distFile.getParentFile().exists()) {// 不存在时创建
distFile.getParentFile().mkdirs();
}
bufferedReader = new BufferedReader(new StringReader(res));
bufferedWriter = new BufferedWriter(new FileWriter(distFile));
char buf[] = new char[1024]; // 字符缓冲区
int len;
while ((len = bufferedReader.read(buf)) != -1) {
bufferedWriter.write(buf, 0, len);
}
bufferedWriter.flush();
bufferedReader.close();
bufferedWriter.close();
} catch (IOException e) {
flag = false;
throw e;
}
return flag;
}

/**
* 取得指定文件内容
*
* @param res 原字符串
* @param filePath 文件路径
* @return 成功标记
* @throws IOException
*/
public static List<String> getContentFromFile(String filePath) throws IOException {
List<String> lists = null;
try {
if(!(new File(filePath).exists())){
return new ArrayList<String>();
}
lists = FileUtils.readLines(new File(filePath), Charset.defaultCharset());
} catch (IOException e) {
throw e;
}
return lists;
}

/**
* 给指定文件追加内容
* @param filePath
* @param contents
*/
public static void addContent(String filePath, List<String> contents) throws IOException {
try {
FileUtils.writeLines(new File(filePath), contents);
} catch (IOException e) {
throw e;
}
}
}