錯誤資訊：

十月 17, 2015 10:18:00 下午 org.apache.catalina.core.ApplicationDispatcher invoke

SEVERE: Servlet.service() for servlet jsp threw exception
javax.el.ELException: Cannot convert 1  of type class java.lang.String to int
at org.apache.el.lang.ELSupport.coerceToNumber(ELSupport.java:357)
at org.apache.el.lang.ELSupport.coerceToNumber(ELSupport.java:328)
at org.apache.el.lang.ELSupport.coerceToType(ELSupport.java:450)
at org.apache.el.ExpressionFactoryImpl.coerceToType(ExpressionFactoryImpl.java:47)
at javax.el.ELContext.convertToType(ELContext.java:232)
at org.apache.el.ValueExpressionImpl.getValue(ValueExpressionImpl.java:189)
at org.apache.jasper.runtime.PageContextImpl.proprietaryEvaluate(PageContextImpl.java:956)
at org.apache.jsp.jsps.book.list_jsp._jspx_meth_c_005fforEach_005f1(list_jsp.java:1006)
at org.apache.jsp.jsps.book.list_jsp._jspService(list_jsp.java:214)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:725)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:432)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:396)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:340)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:725)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:291)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:721)
at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:466)
at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:391)
at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:318)
at cn.itcast.servlet.BaseServlet.service(BaseServlet.java:53)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:725)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:291)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at cn.itcast.filter.EncodingFilter.doFilter(EncodingFilter.java:30)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:219)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:506)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:142)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:610)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:537)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1081)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:658)
at org.apache.coyote.http11.Http11NioProtocol$Http11ConnectionHandler.process(Http11NioProtocol.java:222)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1566)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1523)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:722)
十月 17, 2015 10:18:00 下午 org.apache.catalina.core.StandardWrapperValve invoke
SEVERE: Servlet.service() for servlet [BookServlet] in context with path [/goods] threw exception
java.lang.RuntimeException: org.apache.jasper.JasperException: An exception occurred processing JSP page /jsps/pager/pager.jsp at line 57


54: 
55:     
56:     <%-- 鏄劇ず欏電爜鍒楄〃 --%>
57:     <c:forEach begin="${begin }" end="${end }" var="i">
58:     <c:choose>
59:     <c:when test="${i eq pb.pc }"><span class="spanBtnSelect">${i }</span></c:when>

60:     <c:otherwise> <a href="${pb.url }&pc=${i}" class="aBtn">${i }</a></c:otherwise>

部分程式碼：

  <c:choose>
     <c:when test="${pb.tp<=6 }">
    <c:set var="begin" value="1"/>
    <c:set var="end" value="${pb.tp }"/>
    </c:when>
<c:otherwise>
<c:set var="begin" value="${pb.pc-2 }"/>
<c:set var="end" value="${pb.pc+3 }"/>
<c:if test="${begin < 1 }">
<c:set var="begin" value="1 "/>
<c:set var="end" value="6"/>
</c:if>
<c:if test="${end > pb.tp }">
<c:set var="begin" value="${pb.tp-5 }"/>
<c:set var="end" value="${pb.tp }"/>
</c:if>
</c:otherwise>
     
     </c:choose>

以上錯誤的原因是因為<c:set var="begin" value="1 "/>這行程式碼中value中的1後面多了一個空格，然後就被當成String型別，然後就報錯了，無語