无法使用EL表达式？
无法使用EL表达式？帮帮忙吧 谢谢
HTTP Status 500 -
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type Exception report
message
description The server encountered an internal error () that prevented it from fulfilling this request.
exception
org.apache.jasper.JasperException: Exception in JSP: /courses.jsp:36
33: </tr>
34: <c:forEach items= "courses " var= "m ">
35: <tr>
36: <td> <input type= "checkbox " name= "courses " value= "${m.id} "> </td>
37: <td> <c:out value= "${m.name} "> </c:out> </td>
38: <td> <c:out value= "${m.description} "> </c:out>
39: </tr>
Stacktrace:
org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:504)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:375)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
root cause
javax.servlet.ServletException: Unable to find a value for "id " in object of class "java.lang.String " using operator ". "
org.apache.jasper.runtime.PageContextImpl.doHandlePageException(PageContextImpl.java:858)
org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:791)
org.apache.jsp.courses_jsp._jspService(courses_jsp.java:108)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:332)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
root cause
javax.servlet.jsp.el.ELException: Unable to find a value for "id " in object of class "java.lang.String " using operator ". "
org.apache.commons.el.Logger.logError(Logger.java:481)
org.apache.commons.el.Logger.logError(Logger.java:498)
org.apache.commons.el.Logger.logError(Logger.java:611)
org.apache.commons.el.ArraySuffix.evaluate(ArraySuffix.java:340)
org.apache.commons.el.ComplexValue.evaluate(ComplexValue.java:145)
org.apache.commons.el.ExpressionEvaluatorImpl.evaluate(ExpressionEvaluatorImpl.java:263)
org.apache.commons.el.ExpressionEvaluatorImpl.evaluate(ExpressionEvaluatorImpl.java:190)
org.apache.jasper.runtime.PageContextImpl.proprietaryEvaluate(PageContextImpl.java:932)
org.apache.jsp.courses_jsp._jspx_meth_c_forEach_0(courses_jsp.java:133)
org.apache.jsp.courses_jsp._jspService(courses_jsp.java:95)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:332)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
note The full stack trace of the root cause is available in the Apache Tomcat/5.5.17 logs.
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Apache Tomcat/5.5.17
[解决办法]
web版本要在2.3、2.4、2.5才能用EL
[解决办法]
<c:forEach items= "${courses} " var= "m ">
courses保存到request,session对象中
[解决办法]
Unable to find a value for "id " in object of class "java.lang.String " using operator ". "
我的异常网推荐解决方案：The server encountered an internal error () that prevented it from fulfilling this request.,http://www.myexception.cn/java-web/317.html
