<role rolename="tomcat"/>
<role rolename="manager"/>
<role rolename="manager-gui"/>
<role rolename="manager-script" />
<role rolename="admin-gui"/>
<user username="admin" password="admin" roles="tomcat,manager,manager-script,admin-gui" />
<user username="tomcat" password="tomcat" roles="manager-gui" />

<server>
 <id>tomcat7</id>
 <username>admin</username>
 <password>admin</password>
</server>

  <plugin>
    <groupId>org.apache.tomcat.maven</groupId>
    <artifactId>tomcat7-maven-plugin</artifactId>
    <version>2.2</version>
    <configuration>
     <url>http://127.0.0.1:8080/manager/text</url>
     <server>tomcat7</server>
     <path>/ROOT</path>
     <charset>utf8</charset>
     <update>true</update>
    </configuration>
   </plugin>

<!-- 添加相关依赖 --> 
 <dependency>
   <groupId>org.apache.tomcat</groupId>
   <artifactId>tomcat-servlet-api</artifactId>
   <version>8.5.4</version>
  </dependency>

<Context antiResourceLocking="false" privileged="true" >
 <Valve className="org.apache.catalina.valves.RemoteAddrValve"
   allow="192\.\d+\.\d+\.\d+|::1|0:0:0:0:0:0:0:1" />
</Context>

//第一次
mvn tomcat7:deploy
//之后
mvn tomcat7:redeploy

//这里我要求先重新打包,并跳过测试,再部署
//第一次
mvn package -Pdevelop -Dmaven.skip.test=true tomcat7:deploy

//之后
mvn package -Pdevelop -Dmaven.skip.test=true tomcat7:redeploy