2.7.0 , just rename some method and modify commments, import order

[cvictory]

2.7.0 , just rename some method and modify commments, import order

[codecov-io]

Codecov Report

Merging #3227 into 2.7.0-release will decrease coverage by 0.07%.
The diff coverage is 75%.

@@                 Coverage Diff                 @@
##             2.7.0-release    #3227      +/-   ##
===================================================
- Coverage            63.93%   63.86%   -0.08%     
  Complexity              75       75              
===================================================
  Files                  652      652              
  Lines                28355    28355              
  Branches              4800     4800              
===================================================
- Hits                 18130    18108      -22     
- Misses                7953     7971      +18     
- Partials              2272     2276       +4

Impacted Files	Coverage Δ	Complexity Δ
...ookeeper/support/AbstractZookeeperTransporter.java	85% <75%> (ø)	0 <0> (ø)	⬇️
...ng/transport/dispatcher/all/AllChannelHandler.java	51.42% <0%> (-5.72%)	0% <0%> (ø)
.../org/apache/dubbo/remoting/ExecutionException.java	15.78% <0%> (-5.27%)	0% <0%> (ø)
...e/dubbo/remoting/transport/netty/NettyChannel.java	57.64% <0%> (-4.71%)	0% <0%> (ø)
.../apache/dubbo/remoting/transport/AbstractPeer.java	63.04% <0%> (-4.35%)	0% <0%> (ø)
...he/dubbo/remoting/transport/netty/NettyServer.java	67.85% <0%> (-3.58%)	0% <0%> (ø)
...c/main/java/org/apache/dubbo/rpc/RpcException.java	82.75% <0%> (-3.45%)	0% <0%> (ø)
...dubbo/remoting/exchange/support/DefaultFuture.java	71.14% <0%> (-3.36%)	0% <0%> (ø)
...exchange/support/header/HeaderExchangeHandler.java	55.81% <0%> (-2.33%)	0% <0%> (ø)
...dubbo/rpc/protocol/dubbo/CallbackServiceCodec.java	77.2% <0%> (-2.21%)	0% <0%> (ø)
... and 2 more

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