java.lang.NoSuchFieldError: deferredExpression

type Exception report message description The server encountered an internal error ()

 that prevented it from fulfilling this request. exception javax.servlet.ServletException: java.lang.NoSuchFieldError: deferredExpression org.apache.jasper.servlet.JspServlet.service(JspServlet.java:274) javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
oilsb.filter.CharacterEncodingFilter.doFilter(CharacterEncodingFilter.java:20) root cause java.lang.NoSuchFieldError: deferredExpression org.apache.taglibs.standard.tag.common.core.ForEachSupport.release(ForEachSupport.java:178) org.apache.jasper.runtime.TagHandlerPool.release(TagHandlerPool.java:166)
org.apache.jsp.sitetotal_005fdisplay_jsp._jspDestroy(sitetotal_005fdisplay_jsp.java:44) org.apache.jasper.runtime.HttpJspBase.destroy(HttpJspBase.java:61) org.apache.jasper.servlet.JspServletWrapper.destroy(JspServletWrapper.java:425) org.apache.jasper.servlet.JspServletWrapper.getServlet(JspServletWrapper.java:139)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:329) org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:337) org.apache.jasper.servlet.JspServlet.service(JspServlet.java:266) javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
oilsb.filter.CharacterEncodingFilter.doFilter(CharacterEncodingFilter.java:20)

问题原因：jstl标签版本冲突解决方案以及相关说明： <%@ taglib prefix="c"uri="http://java.sun.com/jsp/jstl/core"%>使用的是jstl.jar <%@ taglib prefix="c"uri="http://java.sun.com/jstl/core_rt"%>使用的是jstl-1.1.2.jar或jstl-1.2.jar
工程中使用的标签必须统一，只用一个jar包。发布后检查Tomcat中jar包是否只有一个