<context-param>　　<param-name>messagePrefix</param-name>　　<param-value>需要在tomcat启动时获取的字符串</param-value></context-param>

 1 import org.springframework.web.context.ContextLoader; 2 import org.springframework.web.context.WebApplicationContext; 3  4 public class WebConfig{ 5      6     /** 7      * 获取web文件中配置的参数 8      * paramName参数名称 9      * */10     public static String getWebConfig(String paramName){11         WebApplicationContext wac = ContextLoader.getCurrentWebApplicationContext();12         String param = "";13         param = wac.getServletContext().getInitParameter(paramName);14         if(param==null||"".equals(param)||"null".equals(param)){15             param="";16         }17         return param;18     }19 20 }