用idea寫的jsp,然后導出war包,本地(tomcat 9.0,jdk 1.8)項目可用,部署到服務器(tomcat 8.5 jdk 1,7)就出錯了錯誤代碼 Exception report message An exception occurred processing JSP page /index.jsp at line 95 description The server encountered an internal error that prevented it from fulfilling this request. exception org.apache.jasper.JasperException: An exception occurred processing JSP page /index.jsp at line 95 92: <div class="shoes"> 93: <div class="container"> 94: <% 95: Vector<Car> cars = new Dao().getCar(); 96: int k=1; 97: out.print(" <div class=\"product-one\">\n"); 98: for(Car car:cars){ Stacktrace: org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:584) org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:466) org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:385) org.apache.jasper.servlet.JspServlet.service(JspServlet.java:329) javax.servlet.http.HttpServlet.service(HttpServlet.java:729) org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) root cause javax.servlet.ServletException: java.lang.UnsupportedClassVersionError: com/Dao/Dao org.apache.jasper.runtime.PageContextImpl.doHandlePageException(PageContextImpl.java:909) org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:838) org.apache.jsp.index_jsp._jspService(index_jsp.java:292) org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70) javax.servlet.http.HttpServlet.service(HttpServlet.java:729) org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:443) org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:385) org.apache.jasper.servlet.JspServlet.service(JspServlet.java:329) javax.servlet.http.HttpServlet.service(HttpServlet.java:729) org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) root cause java.lang.UnsupportedClassVersionError: com/Dao/Dao org.apache.jsp.index_jsp._jspService(index_jsp.java:209) org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70) javax.servlet.http.HttpServlet.service(HttpServlet.java:729) org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:443) org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:385) org.apache.jasper.servlet.JspServlet.service(JspServlet.java:329) javax.servlet.http.HttpServlet.service(HttpServlet.java:729) org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)