1.從github下載最新的Netty穩定版本原始碼

2.解壓原始碼資料夾

3.匯入IDEA

4.跳過checkstyle和xml validate

<plugin>
   <artifactId>maven-checkstyle-plugin</artifactId>
   <version>2.12.1</version>
   <executions>
      <execution>
         <id>check-style</id>
         <goals>
            <goal>check</goal>
         </goals>
         <phase>validate</phase>
         <configuration>
            <skip>true</skip>
         </configuration>
      </execution>
   </executions>
</plugin>

<plugin>
   <groupId>org.codehaus.mojo</groupId>
   <artifactId>xml-maven-plugin</artifactId>
   <version>1.0.1</version>
   <executions>
      <execution>
         <id>check-style</id>
         <goals>
            <goal>check-format</goal>
         </goals>
         <phase>validate</phase>
      </execution>
   </executions>
   <configuration>
      <skip>true</skip>
   </configuration>
</plugin>