大侠们，昨晚测试的时候，结果成功显示，今天早上再来，就不成功了，后台一直报错：
12:41:15.562 [http-8080-3] ERROR org.apache.struts2.dispatcher.Dispatcher - Could not find action or result
/No2_Web/0
com.opensymphony.xwork2.config.ConfigurationException: There is no Action mapped for namespace [/] and action name [0] associated with context path [/No2_Web].
at com.opensymphony.xwork2.DefaultActionProxy.prepare(DefaultActionProxy.java:185) ~[xwork-core-2.3.28.jar:2.3.28]
at org.apache.struts2.impl.StrutsActionProxy.prepare(StrutsActionProxy.java:63) ~[struts2-core-2.3.28.jar:2.3.28]
at org.apache.struts2.impl.StrutsActionProxyFactory.createActionProxy(StrutsActionProxyFactory.java:37) ~[struts2-core-2.3.28.jar:2.3.28]
at com.opensymphony.xwork2.DefaultActionProxyFactory.createActionProxy(DefaultActionProxyFactory.java:58) ~[xwork-core-2.3.28.jar:2.3.28]
at org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:557) [struts2-core-2.3.28.jar:2.3.28]
at org.apache.struts2.dispatcher.ng.ExecuteOperations.executeAction(ExecuteOperations.java:81) [struts2-core-2.3.28.jar:2.3.28]
at org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.doFilter(StrutsPrepareAndExecuteFilter.java:99) [struts2-core-2.3.28.jar:2.3.28]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) [catalina.jar:6.0.41]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) [catalina.jar:6.0.41]
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233) [catalina.jar:6.0.41]
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191) [catalina.jar:6.0.41]
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127) [catalina.jar:6.0.41]
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103) [catalina.jar:6.0.41]
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) [catalina.jar:6.0.41]
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293) [catalina.jar:6.0.41]
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:861) [tomcat-coyote.jar:6.0.41]
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:606) [tomcat-coyote.jar:6.0.41]
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489) [tomcat-coyote.jar:6.0.41]
at java.lang.Thread.run(Thread.java:619) [?:1.6.0_13]
但我的struts.xml里并没有名字为0的action，JSP页面也没有访问0：
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 2.3//EN"
"http://struts.apache.org/dtds/struts-2.3.dtd">
<struts>
<constant name="struts.enable.DynamicMethodInvocation" value="true" />
<constant name="struts.devMode" value="true" />
<package name="default" namespace="/user" extends="struts-default">
<!-- 用户登录和注册 -->
<action name="user*" class="customer.CustomerControl" method="user_{1}" >
<result name="none"></result>
</action>
<!-- 首页菜单区展示 -->
<action name="menulist" class="menu.MenuControl" method="menu_list" >
<result name="redirect" type="redirect">/index_menu.jsp</result>
</action>
<action name="menuhotlist" class="menu.MenuControl" method="menu_list_hot" >
<result name="redirect" type="redirect">/index_menu.jsp</result>
</action>
</package>
<package name="admin" namespace="/admin" extends="struts-default">
<action name="adminlogin" class="admin.AdminControl" method="admin_login" >
<result name="none"></result>
</action>
<action name="adminregister" class="admin.AdminControl" method="admin_register" >
<result name="none"></result>
</action>
</package>
</struts>
具体操作：
A.jsp
<ul>
<li><a href="user/menuhotlist" target="menu">热销菜→</a></li>
<li><a href="user/menulist?menu.type=1" target="menu">招牌菜→</a></li>
<li><a href="user/menulist?menu.type=2" target="menu">主食区→</a></li>
<li><a href="user/menulist?menu.type=3" target="menu">小吃区→</a></li>
<li><a href="user/menulist?menu.type=4" target="menu">饮料区→</a></li>
</ul>
<div class="con_right">
<iframe name="menu" src="user/menuhotlist.action" class="iframe_menu"></iframe>
</div>
B.jsp
<table cellspacing="0px" style="width:795px; border-collapse:collapse; text-align:center;">
<%
Menu menu = null;
List list = new ArrayList();
list = (List)session.getAttribute("menuindex");
String str;
int i;
for(i=0;i<list.size();i++){
menu = (Menu)list.get(i);
%>
<tr>
<td style="width:150px; height:160px; border-bottom:2px dashed #ccc; padding-top:5px; padding-bottom:5px;"><img src="<%=menu.getPic()%>" style="width:150px; height:150px;" ></td>
<td style="width:295px; border-bottom:2px dashed #ccc; font-size:24px;"><%=menu.getName()%></td>
<td style="border-bottom:2px dashed #ccc; font-size:24px;">￥<%=menu.getPrice()%></td>
<td style="border-bottom:2px dashed #ccc; font-size:24px;"><%=menu.getSale()%> 份</td>
<td style="width:170px; border-bottom:2px dashed #ccc;"><input type="button" value="加入购物车" onclick="Button1_onclick(this.id)" style="height:40px; font-size:18px;" /></td>
</tr>
<% } %>
</table>
menuhotlist.action:
public String menu_list_hot(){
HttpServletResponse response = ServletActionContext.getResponse();
Map session = ActionContext.getContext().getSession();
DBConnect db=new DBConnect();
Connection con=db.getCon();
Statement stat = null;
ResultSet rs = null;
String sql = "select top 10 m_name,m_price,m_pic,m_sale from menus order by m_sale desc";
List<Menu> list = new ArrayList();
try {
stat = con.createStatement();
rs=stat.executeQuery(sql);
while(rs.next()){
menu = new Menu();
menu.setName(rs.getString("m_name"));
menu.setPrice(Float.parseFloat(rs.getString("m_price")));
menu.setPic(rs.getString("m_pic"));
menu.setPic(rs.getString("m_sale"));
list.add(menu);
}
con.close();
//放到session
session.put("menuindex",list);
//request.getRequestDispatcher("../index_menu.jsp").forward(request,response);
//response.sendRedirect("../index_menu.jsp");
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return "redirect";
}
menulist.action
public String menu_list(){
HttpServletResponse response = ServletActionContext.getResponse();
Map session = ActionContext.getContext().getSession();
DBConnect db=new DBConnect();
Connection con=db.getCon();
PreparedStatement prepstmt = null;
ResultSet rs = null;
String typestr = "";
String sql = "select m_name,m_price,m_pic,m_sale from menus where m_type = ?";
List<Menu> list = new ArrayList();
switch(menu.getType()){
case 1:typestr="招牌";break;
case 2:typestr="主食";break;
case 3:typestr="小吃";break;
case 4:typestr="饮料";break;
default:
}
try {
prepstmt = con.prepareStatement(sql);
prepstmt.setString(1, typestr);
rs = prepstmt.executeQuery();
while(rs.next()){
menu = new Menu();
menu.setName(rs.getString("m_name"));
menu.setPrice(Float.parseFloat(rs.getString("m_price")));
menu.setPic(rs.getString("m_pic"));
menu.setPic(rs.getString("m_sale"));
list.add(menu);
System.out.println(rs.getString("m_pic"));
}
con.close();
//放到session
session.put("menuindex",list);
//request.getRequestDispatcher("../index_menu.jsp").forward(request,response);
//response.sendRedirect("../index_menu.jsp");
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return "redirect";
}
A.jsp请求action，action把结果放入session的一个List里，B.jsp再取出
