java中获取业务bean的方式，报错

严重: Servlet.service() for servlet jsp threw exception
java.lang.IllegalArgumentException: ServletContext must not be null
at org.springframework.util.Assert.notNull(Assert.java:112)
at org.springframework.web.context.support.WebApplicationContextUtils.getWebApplicationContext(WebApplicationContextUtils.java:96)
at org.springframework.web.context.support.WebApplicationContextUtils.getWebApplicationContext(WebApplicationContextUtils.java:86)
at org.springframework.web.context.support.WebApplicationContextUtils.getRequiredWebApplicationContext(WebApplicationContextUtils.java:68)
at com.jysd.common.base.action.StaticLoad.getBean(StaticLoad.java:20)
at com.jysd.common.base.action.MsgCache.getInitMsg(MsgCache.java:51)
at org.apache.jsp.left_jsp._jspService(left_jsp.java:73)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:374)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:342)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:267)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.struts2.dispatcher.FilterDispatcher.doFilter(FilterDispatcher.java:389)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:286)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:845)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
at java.lang.Thread.run(Thread.java:619)
框架strut2+ibatis+spring，请问高手这个什么问题
public class StaticLoad {

private static ServletContext servletContext = null;

private static String contextName = null;


public static ServletContext getServletContext() {
return servletContext;
}

public synchronized static Object getBean(String name) {
        ApplicationContext ctx =
            WebApplicationContextUtils.getRequiredWebApplicationContext(servletContext);
        return ctx.getBean(name);
    }

public static void setServletContext(ServletContext context){
servletContext = context;
} public static String getContextName() {
return contextName;
}}MeetingPersonService mt=(MeetingPersonService)StaticLoad.getBean("metPersonService"); 这样掉就出问题了