http://tomcat.apache.org/tomcat-7.0-doc/jasper-howto.html
development - Is Jasper used in development mode? If true, the frequency at which JSPs are checked for modification may be specified via the modificationTestInterval parameter.true or false, default true.checkInterval - If development is false and checkInterval is greater than zero, background compiles are enabled. checkInterval is the time in seconds between checks to see if a JSP page (and its dependent files) needs to be recompiled. Default 0 seconds.原文：http://www.cnblogs.com/tang88seng/p/6736981.html