java file操作工具类

package com.test.web.utils;

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.FilenameFilter;
import java.io.IOException;
import java.io.PrintWriter;
import java.io.Reader;
import java.io.Writer;

public class FileUtils {

/**
* 得到路径下对应所有的文件及文件夹
*
* @param path
* @return
*/
public static File[] fileList(String path) {
File file = new File(path);
return file.listFiles();
}

/**
* 得到路径下符合条件的文件及文件夹
*
* @param path
* @param cond
* @return
*/
public static File[] fileList(String path, final String cond) {
File file = new File(path);
return file.listFiles(new FilenameFilter() {
public boolean accept(File dir, String name) {
return name.indexOf(cond) >= 0;
}

});
}

/**
* 读取文件
* @param path
* @return
* @throws IOException
*/
public static String readFile(String path) throws IOException {
File file = new File(path);
StringBuffer strBuffer = new StringBuffer();
Reader reader = null;
BufferedReader breader = null;
try {
reader = new FileReader(file);
breader = new BufferedReader(reader);
String strline = null;
while ((strline = breader.readLine()) != null) {
strBuffer.append(strline + "\n");
}
} catch (FileNotFoundException e) {
throw new FileNotFoundException("文件不能被发现！");
} catch (IOException e) {
throw new IOException("文件读取中出现了异常！");
} finally {
if (breader != null)
breader.close();
if (reader != null)
reader.close();
}
return strBuffer.toString();
}

/**
* 写文件
* @param path
* @param content
* @throws IOException
*/
public static void writeFile(String path , String content) throws IOException{
File file = new File(path);
Writer writer = null;
BufferedWriter bwriter = null;
PrintWriter out = null;
try {
writer = new FileWriter(file , true);
bwriter = new BufferedWriter(writer);
out = new PrintWriter(bwriter);
out.println(content);
} catch (IOException e) {
throw new IOException("写文件出现了异常！");
} finally {
if(out != null) out.close();
if(bwriter != null) bwriter.close();
if(writer != null) writer.close();
}
}
/**
* 创建文件
* @param path
* @return
* @throws IOException
*/
public static boolean createFile(String path) throws IOException{
File file = new File(path);
try {
return file.createNewFile();
} catch (IOException e) {
throw new IOException("文件创建失败！");
}
}
/**
* 创建多个文件夹
* @param path
* @return
*/
public static boolean mkdirs(String path){
File file = new File(path);
return file.mkdirs();
}

/**
* 更换名称
* @param oldpath
* @param newfname
* @return
*/
public static boolean renameFile(String oldpath , String newfname){
File oldfile = new File(oldpath);
File newfile = new File(oldpath.substring(0, oldpath.indexOf("\\") + 1) + newfname);
return oldfile.renameTo(newfile);
}

/**
* 删除文件及文件夹
* @param path
* @return
*/
public static boolean delete(String path){
File file = new File(path);
return file.delete();
}

}