快疯了。还是报错。
2011-7-13 15:21:22 org.apache.catalina.core.StandardWrapperValve invoke
严重: Servlet.service() for servlet jsp threw exception
java.lang.NullPointerException
at org.apache.jsp.sysmgr.user_005fmaint_jsp._jspService(user_005fmaint_jsp.java:164)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:374)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:342)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:267)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:849)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:454)
at java.lang.Thread.run(Thread.java:619)jsp页面:<%
int pageNo = 1;
int pageSize = 2; PageModel pageModel = UserManager.getInstance().findAllUser(pageNo,pageSize);
%>
。
<%
List userList = pageModel.getList();
for(Iterator iter = userList.iterator(); iter.hasNext(); ) {
User user = (User)iter.next();
%>
<tr>
<td class="rd8">
<input type="checkbox" name="selectFlag" class="checkbox1"
value="<%=user.getUserId() %>">
</td>
<td class="rd8">
<%=user.getUserId() %>
</td>
<td class="rd8">
<%=user.getUserName() %>
</td>
<td class="rd8">
<%=user.getContactTel() %>
</td>
<td class="rd8">
<%=user.getEmail() %>
</td>
<td class="rd8">
<%=user.getCreateDate() %>
</td>
</tr>
<%
}
%>
</table>
2011-7-13 15:21:22 org.apache.catalina.core.StandardWrapperValve invoke
严重: Servlet.service() for servlet jsp threw exception
java.lang.NullPointerException
at org.apache.jsp.sysmgr.user_005fmaint_jsp._jspService(user_005fmaint_jsp.java:164)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:374)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:342)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:267)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:849)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:454)
at java.lang.Thread.run(Thread.java:619)jsp页面:<%
int pageNo = 1;
int pageSize = 2; PageModel pageModel = UserManager.getInstance().findAllUser(pageNo,pageSize);
%>
。
<%
List userList = pageModel.getList();
for(Iterator iter = userList.iterator(); iter.hasNext(); ) {
User user = (User)iter.next();
%>
<tr>
<td class="rd8">
<input type="checkbox" name="selectFlag" class="checkbox1"
value="<%=user.getUserId() %>">
</td>
<td class="rd8">
<%=user.getUserId() %>
</td>
<td class="rd8">
<%=user.getUserName() %>
</td>
<td class="rd8">
<%=user.getContactTel() %>
</td>
<td class="rd8">
<%=user.getEmail() %>
</td>
<td class="rd8">
<%=user.getCreateDate() %>
</td>
</tr>
<%
}
%>
</table>
建议你先到后台输出结果试试哪里为null!
把每个要输出的user都打印出来看看
List userList = pageModel.getList();
for(Iterator iter = userList.iterator(); iter.hasNext(); ) {
User user = (User)iter.next();
%>
这一块遍历出错了,建议尝试一下struts2的<s:iterator>或者尝试el表达式的foreach的<c:forEach >来遍历