不需要启动tomcat，不需要手动拷贝war包到tomcat，就可以实现项目自动发布到tomcat中
01 在tomcat配置文件tomcat-users.xml文件中添加<tomcat-users><!--热部署--><role rolename="admin-gui"/><role rolename="admin-script"/><role rolename="manager-gui"/><role rolename="manager-script"/><role rolename="manager-jmx"/><role rolename="manager-status"/><user username="admin" password="admin" roles="manager-gui,manager-script,manager-jmx,manager-status,admin-script,admin-gui"/></tomcat-users>
02 在tomcat的confCatalinalocalhost文件夹中创建manager.xml文件并添加<?xml version="1.0" encoding="UTF-8"?><Context privileged="true" antiResourceLocking="false"docbase="${catalina.home}/webapps/manager"><Valve className="org.apache.catalina.valves.RemoteAddrValve" allow="^.*$" /></Context>
03 在maven文件夹，settings.xml文件中添加<servers><!--热部署--><server><id>tomcat</id><username>admin</username><password>admin</password></server></servers>
04 在maven项目pom.xml文件中添加<build><finalName>transition</finalName><!-- 热部署 --><plugins><plugin><groupId>org.codehaus.mojo</groupId><artifactId>tomcat-maven-plugin</artifactId><version>1.1</version><configuration><url>http://localhost:8080/manager/text</url><server>tomcat7</server><username>admin</username><password>admin</password><ignorePackaging>true</ignorePackaging></configuration><executions><execution><phase>package</phase><goals><goal>run</goal></goals></execution></executions></plugin>
05 点击项目右键=》run as=》maven build... 在goals中填tomcat:redeploy =》apply=>run
