我有一个有3帧的框架集。其中两个有jsp as＆＃34; src＆＃34;。 只有一个人拥有＆＃34; src＆＃34;作为控制者。它应该到达控制器，控制器应该向param.jsp页面发送请求，该页面通过javascript（body onload）向控制器提交表单。所以最后我应该向控制器发出两个请求。
但不知怎的，我正在向没有参数的控制器发出第三个请求。
由于这里的代码遵循命令方法，如果控制器请求没有任何命令作为参数，它会抛出异常并进入错误页面。有关如何追溯请求的想法吗？
好的......我把相关的代码部分放在这里..
我用来命中InitServlet的Url是application / InitServlet？reportCommand = LobNumberDetail
public class InitServlet extends HttpServlet{
public void doPost(HttpServletRequest req, HttpServletResponse res) throws ServletException, IOException{
String next = "/";
String reportCommand=Misc.getParameter(req,"reportCommand","");
next="/controller?formAction="+reportCommand;
}
}
ControllerServlet.java
-----------------------
public class ControllerServlet扩展了HttpServlet {
public void init() throws ServletException {
Map<String, CCDemandCommand> commands = Collections.synchronizedMap(new HashMap<String, CCDemandCommand>());
commands.put("LobNumberDetail", new LobNumberDetailCommand());
}
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
String action = "";
action = getNullableParm(request, "formAction", "Error");
CCDemandCommand dc = commands.get(action);
if (dc == null) {
dc = commands.get("Error");
}
dc.execute(request, response);
}
}
LobNumberDetailCommand.java
public class LobNumberDetailCommand扩展了CCDemandCommand {
@Override
protected String executeCommand(HttpServletRequest request,HttpServletResponse response) throws Exception {
//do something with action and subaction
String next="";
request.setAttribute("reportName", "LobNumberDetail");
request.setAttribute("reportDisplayName", "Lob Number Detail Report");
next="/MainReportFrameset.jsp";
if (subaction != null&& subaction!="") {
if("params".equalsIgnoreCase(subaction))
{
next="/lobNumberDetailParam.jsp";
}
else if("getreport".equalsIgnoreCase(subaction))
{
next="/lobNumberDetailReport.jsp";
}
}
return next;
}
}
MainReportFrameset.jsp
----------------------
<%@ page import="com.chase.Misc"
session="false"
%>
<%
String sReportName =(String) request.getAttribute("reportName");
String sReportDisplayName =(String) request.getAttribute("reportDisplayName");
String sFrameLeftTarget ="controller?formAction="+sReportName+"&subAction=params";
String sFrameRightTarget= "Wait.jsp";
%>
<html>
<head>
<title></title>
</head>
<frameset rows="70,*" id="frmsetMain" frameborder="0" border="0">
<frame name="frameTop" src="./frameTop.jsp?p_report_display_name=<%=sReportDisplayName%>" noresize scrolling="no"/>
<frameset cols="0,*" id="frmsetContent" frameborder="5" border="5">
<frame name="frameLeft" src="<%=sFrameLeftTarget%>" noresize/>
<frame name="frameRight" src="<%=sFrameRightTarget%>" noresize/>
</frameset>
</frameset>
</html>LobNumberDetailParam.jsp
-------------------------
<html>
<head>
<script language="JavaScript" type="text/javascript">
function init() {
document.frmParameters.submit();
return;
}
</script>
<body topmargin="0" leftmargin="0" onload="init()">
<form name="frmParameters" id="frmParameters" action="controller"
target="frameRight" method="post"
onsubmit="return prepareReportRun('lobnumberdetail')">
<input type="hidden" name="formAction" value="LobNumberDetail"/>
<input type="hidden" name="subAction" value="getreport" />
</form>
</body>
</head>
</html>