在部署的时候出现Server Tomcat v6.0 Server at localhost was unable to start within 45 seconds. If the server requires more time, try increasing the timeout in the server editor.
 

我们找到当前工程的workplace目录,然后按下面的操作:
找到workspace\.metadata\.plugins\org.eclipse.wst.server.core\servers.xml文件。
<servers>
<server auto-publish-setting="2" auto-publish-time="1" configuration-id="/Servers/Tomcat v6.0 Server at localhost-config" deployDir="wtpwebapps" hostname="localhost" id="Tomcat v6.0 Server at localhost" name="Tomcat v6.0 Server at localhost" runtime-id="Apache Tomcat v6.0" server-type="org.eclipse.jst.server.tomcat.60" server-type-id="org.eclipse.jst.server.tomcat.60" start-timeout="45" stop-timeout="15" testEnvironment="true" timestamp="3"/>
</servers>

把 其中的start-timeout="45" 改为  start-timeout="100" 或者更长,根据不同同学的工程大小来设置。
最后重启eclipse就可以了。