Netty框架中，pom文件中引用netty-alljar发生错误，解决办法。
错误现象：
Failure to transfer io.netty:netty-tcnative:jar:${os.detected.classifier}:2.0.0.Final from http://maven.aliyun.com/nexus/content/repositories/central/ was cached in the local repository, resolution will not be reattempted until the update interval of alimaven has elapsed or updates are forced. Original error: Could not transfer artifact io.netty:netty-tcnative:jar:${os.detected.classifier}:2.0.0.Final from/to alimaven (http://maven.aliyun.com/nexus/content/repositories/central/): Illegal character in path at index 123: http://maven.aliyun.com/nexus/content/repositories/central/io/netty/netty-tcnative/2.0.0.Final/netty-tcnative-2.0.0.Final-${os.detected.classifier}.jar
解决办法：下列黑体字的添加。
<dependency> <groupId>io.netty</groupId> <artifactId>netty-all</artifactId> <version>4.1.9.Final</version> <exclusions> <exclusion> <groupId>io.netty</groupId> <artifactId>netty-tcnative</artifactId> </exclusion> </exclusions> </dependency> <dependency> <groupId>io.netty</groupId> <artifactId>netty-example</artifactId> <version>4.1.9.Final</version> <exclusions> <exclusion> <groupId>io.netty</groupId> <artifactId>netty-tcnative</artifactId> </exclusion> </exclusions> </dependency>
