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java.lang.NoSuchMethodException : java. lang.String.substring(java.lang.Long,java.lang.Long)

转载 作者:搜寻专家 更新时间:2023-11-01 01:45:57 29 4
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我有一个 jsp 代码在其中一台机器上运行良好。但是当我复制到另一台机器时,我得到了这个 no such method found 异常。我是 Spring 的新手。有人可以解释我错过了什么吗?

以下是导致异常的代码行:

<c:set var="rawDate" value="${result.getDate()}"/>
<c:set var="rawTime" value="${result.getTime()}"/>
<td id="formattedDate" class="center"><c:out value="${rawDate.substring(4,6)}"/>/<c:out value="${rawDate.substring(6,8)}"/></td>
<td id="formattedTime" class="center"><c:out value="${result.getTime().substring(0,2)}"/>:<c:out value="${result.getTime().substring(2,4)}"/></td>

这是堆栈跟踪

May 9, 2012 9:35:56 AM org.apache.catalina.core.ApplicationDispatcher invoke
SEVERE: Servlet.service() for servlet jsp threw exception
(, )
at java.lang.Class.getMethod(Class.java:1605)
at javax.el.BeanELResolver.invoke(BeanELResolver.java:405)
at javax.el.CompositeELResolver.invoke(CompositeELResolver.java:147)
at org.apache.el.parser.AstValue.getValue(AstValue.java:159)
at org.apache.el.ValueExpressionImpl.getValue(ValueExpressionImpl.java:189)
at org.apache.jasper.runtime.PageContextImpl.proprietaryEvaluate(PageContextImpl.java:989)
at org.apache.jsp.WEB_002dINF.jsp.tables.WatchAllTable_jsp._jspx_meth_c_005fout_005f8(WatchAllTable_jsp.java:1132)
at org.apache.jsp.WEB_002dINF.jsp.tables.WatchAllTable_jsp._jspx_meth_c_005fforEach_005f0(WatchAllTable_jsp.java:412)
at org.apache.jsp.WEB_002dINF.jsp.tables.WatchAllTable_jsp._jspService(WatchAllTable_jsp.java:127)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:417)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:391)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:306)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:672)
at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:463)
at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:402)
at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:329)
at org.springframework.web.servlet.view.InternalResourceView.renderMergedOutputModel(InternalResourceView.java:238)
at org.springframework.web.servlet.view.AbstractView.render(AbstractView.java:262)
at org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1180)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:950)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:852)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:882)
at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:789)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:641)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:306)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:240)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:161)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:164)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:550)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:380)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:243)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:188)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:166)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:288)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:662)
org.apache.catalina.core.StandardWrapperValve invoke
SEVERE: Servlet.service() for servlet [spring] in context with path [/watch] threw exception [An exception occurred processing JSP page /WEB-INF/jsp/tables/WatchAllTable.jsp at line 77

74: <c:set var="rawDate" value="${result.getDate()}"/>
75: <c:set var="rawTime" value="${result.getTime()}"/>
76:
77: <td id="formattedDate" class="center"><c:out value="${rawDate.substring(4,6)}"/>/<c:out value="${rawDate.substring(6,8)}"/></td>
78: <td id="formattedTime" class="center"><c:out value="${result.getTime().substring(0,2)}"/>:<c:out value="${result.getTime().substring(2,4)}"/></td>
79: <td id="documentGroup" class="hidden"><c:out value="${curDocGroup}"/> </td>

这是一个链接,看起来像是这个问题的解决方案,但我不明白他们在说什么。

http://forum.springsource.org/showthread.php?108175-SpEL-does-not-recognize-functions&s=e077b42fd45ae3a3177a01c90339893c

谢谢

最佳答案

EL (表达式语言,那些 ${} 东西)将数字视为 longreal method期待 int只有数字。这解释了这个异常(exception)。

你需要JSTL fn:substring() 相反,

<%@taglib prefix="fn" uri="http://java.sun.com/jsp/jstl/functions" %>
...
<c:set var="rawDate" value="${result.date}"/>
<c:set var="rawTime" value="${result.time}"/>
<c:out value="${fn:substring(rawDate,4,6)}"/>/<c:out value="${fn:substring(rawDate,6,8)}"/>
<c:out value="${fn:substring(rawtime,0,2)}"/>:<c:out value="${fn:substring(rawtime,2,4)}"/>

或者更好,直接使用正确的工具,将其存储为 java.util.Date 在模型中使用 JSTL <fmt:formatDate> .

<%@taglib prefix="fmt" uri="http://java.sun.com/jsp/jstl/fmt" %>
...
<fmt:formatDate value="${result.realJavaUtilDate}" pattern="MM/dd HH:mm" />

为其保存的数据使用正确的数据类型。

关于java.lang.NoSuchMethodException : java. lang.String.substring(java.lang.Long,java.lang.Long),我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/10557276/

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