字符串ArrayList <String>

Question

我正在實現Spring MVC。不同的字符串值顯示在jsp頁面上。

幫助我將這些字符串值移動到ArrayList以減少龐大的代碼。

@Controller("Control") 
Public Class Controller{ 
... 
@RequestMapping() 
public String init(RenderRequest request, RenderResponse response, 
     Model model) { 
    try { 
     String auth = request.getAuthType(); //All these Strings to be moved to ArrayList<String> 
     String context = request.getContextPath(); 
     String ETags = request.getETag(); 
     String remoteuser = request.getRemoteUser(); 
     String sessionID = request.getRequestedSessionId(); 
     String resContent = request.getResponseContentType(); 
     String scheme = request.getScheme(); 
     String getServerName = request.getServerName(); 
     String getWindowID = request.getWindowID(); 

     PortletMode getPortletMode = request.getPortletMode(); //If these different types could also be moved <?> 
     PortalContext Pcontext = request.getPortalContext(); 

     model.addAttribute("Name", "Sallu"); 
     model.addAttribute("auth",auth); 
     model.addAttribute("context", context); 
     model.addAttribute("ETags",ETags); 
     model.addAttribute("remoteuser", remoteuser); 
     model.addAttribute("sessionID",sessionID); 
     model.addAttribute("resContent",resContent); 
     model.addAttribute("scheme", scheme); 
     model.addAttribute("getServerName",getServerName); 
     model.addAttribute("getWindowID", getWindowID); 
     model.addAttribute("getPortletMode",getPortletMode); 
     model.addAttribute("Pcontext",Pcontext); 
    } catch (Exception ex) { 
     LOG.error(ErrorUtil.convertStackTraceToString(ex)); 
    } 
    return JSP_Page; 
} 

還幫我換了JSP也使用

<%My JSP%> 
    <tr> 
    <td>Pcontexts------${Pcontext}</td> 
</tr> 
<tr> 
    <td>auths------${auth}</td> 
</tr> 
    ... 

    //To be changed to something using <c:ForEach or some Loop> 

更新：

當我加入這個控制器，並做如Bozho顯示，在JSP，它仍然沒有不工作：

model.addAttribute("paramsMap", request.getParameterMap()); 

Answer 1

您可以使用request.getParameterMap() - 它會給你一個Map，然後你可以在JSP中迭代：。

<c:forEach items="${paramValues}" var="mapEntry"> 
    <td>${mapEntry.key}</td> 
    <td>${mapEntry.value}</td> 
</c:forEach> 

paramValues上面是一個包含地圖的隱式變量。

當使用forward時，這不需要在控制器中做任何事情。您可以使用：model.addAttribute("paramsMap", request.getParameterMap())，但不應該有必要。