修复 CollectionUtils类toStringMap方法没有检查 pairs 参数是否为空.

[xiaoheng1]

CollectionUtils类toStringMap方法没有检查 pairs 参数是否为空 in #5100.

添加如下代码

if (pairs == null || pairs.length == 0) {
return parameters;
}

resolve #5100

[CrazyHZM]

Please take a look at my comment.

[CrazyHZM]

Replace it with the ArrayUtils#isEmpty.

[xiaoheng1]

OK，i will change it.

[codecov-io]

Codecov Report

Merging #5102 into master will decrease coverage by 0.04%.
The diff coverage is 100%.

@@             Coverage Diff              @@
##             master    #5102      +/-   ##
============================================
- Coverage     64.08%   64.03%   -0.05%     
- Complexity      452      455       +3     
============================================
  Files           769      769              
  Lines         33261    33263       +2     
  Branches       5249     5250       +1     
============================================
- Hits          21314    21300      -14     
- Misses         9516     9531      +15     
- Partials       2431     2432       +1

Impacted Files	Coverage Δ	Complexity Δ
...org/apache/dubbo/common/utils/CollectionUtils.java	88.78% <100%> (-0.74%)	0 <0> (ø)
.../apache/dubbo/qos/protocol/QosProtocolWrapper.java	65.85% <0%> (-17.08%)	0% <0%> (ø)
.../apache/dubbo/remoting/transport/AbstractPeer.java	58.69% <0%> (-10.87%)	0% <0%> (ø)
.../rpc/protocol/dubbo/LazyConnectExchangeClient.java	56.47% <0%> (-2.36%)	0% <0%> (ø)
.../dubbo/remoting/transport/netty4/NettyChannel.java	64.77% <0%> (-2.28%)	0% <0%> (ø)
...he/dubbo/registry/multicast/MulticastRegistry.java	67.87% <0%> (-1.81%)	0% <0%> (ø)
...dubbo/metadata/support/AbstractMetadataReport.java	72.83% <0%> (-1.74%)	0% <0%> (ø)
...pache/dubbo/remoting/transport/AbstractServer.java	47.91% <0%> (-1.05%)	0% <0%> (ø)
...a/org/apache/dubbo/monitor/dubbo/DubboMonitor.java	90.65% <0%> (+0.93%)	17% <0%> (+1%)	⬆️
...he/dubbo/remoting/transport/netty/NettyServer.java	73.21% <0%> (+3.57%)	9% <0%> (+1%)	⬆️
... and 2 more

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 79c6166...cdaf4dd. Read the comment docs.

[CrazyHZM]

LGTM