DWR+VML实时曲线
要求做一个WEB端的服务器实时流量利用率监控曲线！具体做法是后台采用SNMP4J采集服务器流量，前台采用DWR调用后台Bean得到数据，然后利用VML显示曲线。
1、DWR配置，先把DWR.jar加入到WEB-INF/lib下。
在web.xml下加入如下片段：
<div style="padding-bottom: 4px; background-color: #eeeeee; padding-left: 4px; width: 98%; padding-right: 5px; font-size: 13px; padding-top: 4px; border: #cccccc 1px solid;">http://www.blogjava.net/Images/OutliningIndicators/None.gif<servlet>
http://www.blogjava.net/Images/OutliningIndicators/None.gif <servlet-name>dwr-invoker</servlet-name>
http://www.blogjava.net/Images/OutliningIndicators/None.gif <servlet-class>org.directwebremoting.servlet.DwrServlet</servlet-class>
http://www.blogjava.net/Images/OutliningIndicators/None.gif <init-param>
http://www.blogjava.net/Images/OutliningIndicators/None.gif <param-name>debug</param-name>
http://www.blogjava.net/Images/OutliningIndicators/None.gif <param-value>true</param-value>
http://www.blogjava.net/Images/OutliningIndicators/None.gif </init-param>
http://www.blogjava.net/Images/OutliningIndicators/None.gif </servlet>
http://www.blogjava.net/Images/OutliningIndicators/None.gif <servlet-mapping>
http://www.blogjava.net/Images/OutliningIndicators/None.gif <servlet-name>dwr-invoker</servlet-name>
http://www.blogjava.net/Images/OutliningIndicators/None.gif <url-pattern>/dwr/*</url-pattern>
http://www.blogjava.net/Images/OutliningIndicators/None.gif </servlet-mapping>
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