String和ByteBuffer互转

1. String 转换 ByteBuffer：

   public static ByteBuffer getByteBuffer(String str) {

   return ByteBuffer.wrap(str.getBytes());

   }

2. 2

   ByteBuffer 转换 String：

   public static String getString(ByteBuffer buffer) {

   Charset charset = null;

   CharsetDecoder decoder = null;

   CharBuffer charBuffer = null;

   try {

   charset = Charset.forName("UTF-8");

   decoder = charset.newDecoder();

   //用这个的话，只能输出来一次结果，第二次显示为空

   // charBuffer = decoder.decode(buffer);

   charBuffer = decoder.decode(buffer.asReadOnlyBuffer());

   return charBuffer.toString();

   } catch (Exception ex) {

   ex.printStackTrace();

   return "error";

   }

   }