Question

javax.servlet.jsp.JspTagException：'begin'＆lt; 0

有一段时间你遇到一个错误而你说：什么是什么？ tagexception开始＆lt; 0.看到这个奇迹之前??

Answer 1

我尝试使用以下代码段重现您的例外：

<c:forEach begin="-1" end="1">
    <p>blah
</c:forEach>

然而，我在Tomcat的默认错误页面中得到了更清晰且自我解释的异常跟踪：

org.apache.jasper.JasperException: An exception occurred processing JSP page /jsp.jsp at line 12

9:     <body>
10:         
11: 
12: <c:forEach begin="-1" end="1">
13: <p>bla
14: </c:forEach>
15: 


Stacktrace:
    org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:505)
    org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:398)
    org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:342)
    org.apache.jasper.servlet.JspServlet.service(JspServlet.java:267)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:717)

root cause

javax.servlet.ServletException: javax.servlet.jsp.JspTagException: 'begin' < 0
    org.apache.jasper.runtime.PageContextImpl.doHandlePageException(PageContextImpl.java:862)
    org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:791)
    org.apache.jsp.jsp_jsp._jspService(jsp_jsp.java:74)
    org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
    org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:374)
    org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:342)
    org.apache.jasper.servlet.JspServlet.service(JspServlet.java:267)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:717)

root cause

javax.servlet.jsp.JspTagException: 'begin' < 0
    javax.servlet.jsp.jstl.core.LoopTagSupport.validateBegin(LoopTagSupport.java:478)
    org.apache.taglibs.standard.tag.rt.core.ForEachTag.setBegin(ForEachTag.java:55)
    org.apache.jsp.jsp_jsp._jspx_meth_c_005fforEach_005f0(jsp_jsp.java:90)
    org.apache.jsp.jsp_jsp._jspService(jsp_jsp.java:65)
    org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
    org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:374)
    org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:342)
    org.apache.jasper.servlet.JspServlet.service(JspServlet.java:267)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:717)

note The full stack trace of the root cause is available in the Apache Tomcat/6.0.29 logs.

您的异常处理或解释可能有问题吗？看起来你只是在一些自定义错误页面中打印/显示根本原因的e.getMessage()并忽略堆栈跟踪信息的残余。我建议添加一个e.printStackTrace()，以便至少清楚它来自哪里。

javax.servlet.jsp.JspTagException：'begin'＆lt; 0

1 个答案: