exception
org.apache.jasper.JasperException: Exception in JSP: /index.jsp:234
231: <table width="100%" border="0" cellspacing="1"
232: cellpadding="1" class="tableBorder">
233: <%
234: Iterator iter = pl.iterator();
235:
236: while (iter.hasNext()) {
237: Project pro = (Project) iter.next();
Stacktrace:
org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:451)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:373)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:329)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:265)
javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
cn.edu.bit.servlet.EncodingFilter.doFilter(EncodingFilter.java:66)
root cause
java.lang.NullPointerException
org.apache.jsp.index_jsp._jspService(index_jsp.java:302)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:98)
javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:331)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:329)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:265)
javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
cn.edu.bit.servlet.EncodingFilter.doFilter(EncodingFilter.java:66)
------解决方案--------------------
感觉pl是null
------解决方案--------------------
system.out.println(pl); 估计集合木有东西，未判断空就用来迭代
------解决方案--------------------
空指针异常，很有可能是你的pl为nill，用断点查看一下就知道了，输出也试试，
------解决方案--------------------
你要的现在是null