关于mina iobuffer的字符转换

* 将byte[]转换成string   
* @param butBuffer 
*/ 
public static String byteToString(byte [] b)  
{  
       StringBuffer stringBuffer = new StringBuffer();  
       for (int i = 0; i < b.length; i++)  
       {  
           stringBuffer.append((char) b [i]);  
       }  
       return stringBuffer.toString();  
}  
 
/** 
* 将string转换成IoBuffer   
* @param str 
*/ 
public static IoBuffer stringToIoBuffer(String str)  
{  
 
       byte bt[] = str.getBytes();  
 
       IoBuffer ioBuffer = IoBuffer.allocate(bt.length);  
       ioBuffer.put(bt, 0, bt.length);  
       ioBuffer.flip();  
       return ioBuffer;  
}  
/** 
* 将byte []转换成IoBuffer   
* @param str 
*/ 
public static IoBuffer byteToIoBuffer(byte [] bt,int length)  
{  
 
       IoBuffer ioBuffer = IoBuffer.allocate(length);  
       ioBuffer.put(bt, 0, length);  
       ioBuffer.flip();  
       return ioBuffer;  
}  
/** 
* 将IoBuffer转换成byte []  
* @param Object 
*/ 
public static byte [] ioBufferToByte(Object message)  
{  
      if (!(message instanceof IoBuffer))  
      {  
          return null;  
      }  
      IoBuffer ioBuffer = (IoBuffer)message;  
      byte[] b = new byte[ioBuffer.limit()];  
      ioBuffer.get(b);  
      return b;  
}  
/** 
* 将IoBuffer转换成string   
* @param butBuffer 
*/ 
public static String ioBufferToString(Object message)  
{  
      if (!(message instanceof IoBuffer))  
      {  
        return "";  
      }  
      IoBuffer ioBuffer = (IoBuffer) message;  
      byte[] b = new byte [ioBuffer.limit()];  
      ioBuffer.get(b);  
      StringBuffer stringBuffer = new StringBuffer();  
 
      for (int i = 0; i < b.length; i++)  
      {  
 
       stringBuffer.append((char) b [i]);  
      }  
       return stringBuffer.toString();  
}