关于java:ByteBuf-常用操作

字节操作

<!--创立形式 1 --> ByteBuf buffer = Unpooled.buffer(10); <!--创立形式 2-->  ByteBuf byteBuf = Unpooled.copiedBuffer("hello,world!", Charset.forName("utf-8"));   int len = byteBuf.readableBytes(); //可读的字节数  12 System.out.println("len=" + len);     //应用for取出各个字节 for (int i = 0; i < len; i++) {     System.out.println((char) byteBuf.getByte(i)); // 强行转为字符串，否则会间接打印ASCII码 }    //依照某个范畴读取 System.out.println(byteBuf.getCharSequence(0, 4, Charset.forName("utf-8"))); System.out.println(byteBuf.getCharSequence(4, 6, Charset.forName("utf-8")));             ByteBuf byteBuf1 = Unpooled.copiedBuffer(byteBuf);

ByteBuf转字节数组

byte[] bytes = ByteBufUtil.getBytes(byteBuf1);

字节读取

    <!--读取-->         ByteArrayInputStream inputStream = new ByteArrayInputStream(bytes);        byte[] newBytes = new byte[bytes.length];        while (inputStream.read(newBytes)!=-1){            inputStream.close();            System.out.println(new String(newBytes));        }       <!--读取一部分-->        ByteArrayInputStream inputStream1 = new ByteArrayInputStream(bytes,2,5);        byte[] newBytes1 = new byte[bytes.length];        while (inputStream1.read(newBytes1)!=-1){            inputStream1.close();            System.out.println(new String(newBytes1));        }