Netty ByteBuf 相关 API

 package com.example.demo.util;

    
  
    
 import io.netty.buffer.ByteBuf;
    
 import io.netty.buffer.ByteBufAllocator;
    
  
    
 public class ByteBufTest {
    
  
    
     public static void main(String[] args) {
    
     //初始容量9  最大容量100
    
     ByteBuf buf = ByteBufAllocator.DEFAULT.buffer(9, 100);
    
     print("ByteBufAllocator.DEFAULT.buffer(9,100)", buf);
    
     //write方法改变写指针 写完之后写指针小于capacity  buf仍可写
    
     buf.writeBytes(new byte[]{1, 2, 3, 4});
    
     print("writeBytes(1,2,3,4)", buf);
    
     // int类型占四字节 写完int后 写指针增加4
    
     buf.writeInt(11);