对字符文档输入输出封装类

package edu.basejava.util;

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;

public class CharFileIO
{
 public static String readTxtFile(Object... args)
 {
  File file = null;
  String encoding = "UTF-8";
  BufferedReader br;
  StringBuffer strBuff = new StringBuffer();
  if (args.length > 0)
   file = new File( (String) args[0]);
  else
  {
   Log.error("至少输入文件路径");
   return null;
  }
  if (args.length > 1)
   encoding = (String) args[1];
  try
  {
   br = new BufferedReader(new InputStreamReader(new FileInputStream(
     file), encoding));
   char[] cbuf = new char[1024];
   while ( br.read(cbuf) != -1)
   {
    strBuff.append(cbuf);
   }
  } catch (FileNotFoundException e)
  {
   e.printStackTrace();
  } catch (IOException e)
  {
   e.printStackTrace();
  }

  return strBuff.toString();
 }
 public static void writeTxtFile(Object... args)
 {
  String data = null;
  File file = null;
  String encoding = "UTF-8";
  BufferedWriter bw;
  
  if (args.length > 1)
  {
   data = (String) args[0];
   file = new File( (String) args[1]);
  }
  else
  {
   Log.error("至少输入字符串内容和文件路径");
   return;
  }
  if (args.length > 2)
   encoding = (String) args[2];
  try
  {
   bw = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(
     file), encoding));
   bw.write(data);
   //bw.flush();
   bw.close();
   
  } catch (FileNotFoundException e)
  {
   e.printStackTrace();
  } catch (IOException e)
  {
   e.printStackTrace();
  }
 }
 public static long getFileSize(String file) {
  File f = new File(file);
  return f.length();
 }
}