Question

我正在使用JSP操作标签制作一些模板示例。我想展示 TD中 template.jsp 中包含的 compare.jsp 中的 compareContent.jsp 。这是我的代码的图像。

这是我加载项目时显示的第一个主页。

这是内部框架表。如果单击内部导航上的“第一”，则必须在此处显示 compareContent.jsp 。像这样。

但是当我在内部框架中单击LI时， compare.jsp 显示在整个页面中

index.jsp

此文件控制 template.jsp 。

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>

<jsp:forward page="template.jsp">
    <jsp:param name="CONTENTPAGE" value="mainContent.jsp"/>
</jsp:forward>

template.jsp

此文件是主要的外部框架。如果单击nav.jsp中的SECOND按钮，则会加载 toCompare.jsp 。

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>

<head>
  <meta charset="utf-8">
  <title></title>
  <link rel="stylesheet" type="text/css" href="./css/template.css">
</head>

<body>
<%
    String mainPage = request.getParameter("CONTENTPAGE");
%>
<script>alert("<%= mainPage %>");</script>
  <table id="outTable">
    <tr class="templateTr">
      <td id="logo"><a href="index.jsp">LOGO</a></td>
      <td colspan="4" id="navTd">           
        <jsp:include page="nav.jsp" flush="flased"/>
      </td>
    </tr>

    <tr class="templateTr">
      <td colspan="4" rowspan="2" >
        <jsp:include page="<%= mainPage %>" flush="flased"/>
      </td>
      <td class="contant1">
        <jsp:include page="login.jsp" flush="flased"/>
      </td>
    </tr>

    <tr class="templateTr">
      <td class="contant2">
        <jsp:include page="twitter.jsp" flush="flased"/>      
      </td>
    </tr>
  </table>
</body>

</html>

toCompare.jsp

我在这里使用JSP操作标签。

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<jsp:forward page="template.jsp">
    <jsp:param name="CONTENTPAGE" value="compare.jsp" />
</jsp:forward>

compare.jsp

这是内部框架表。

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">
    <title></title>
  </head>
  <link rel="stylesheet" href="./css/compare.css">
  <body>

  <%
  // Get page with name COMPAREPAGE
  String comparePage = request.getParameter("COMPAREPAGE");
  if(comparePage == null){
        comparePage = "mainCompare.jsp";
  }
  %>

    <table id="compareTable" border="1">
      <tr class="compareTr">
        <td colspan="4" class="compareNav">
          <ul id="compareNavUl">
            // if I click LI, toCompareContent.jsp called with NUM parameter
            <a href="toCompareContent.jsp?NUM=1" class="compareA"><li class="compareli">FIRST</li></a> 
            <a href="toCompareContent.jsp?NUM=2" class="compareA"><li class="compareli">SECOND</li></a>
            <a href="toCompareContent.jsp?NUM=3" class="compareA"><li class="compareli">THIRD</li></a>
            <a href="toCompareContent.jsp?NUM=4" class="compareA"><li class="compareli">FOURTH</li></a>
            <a href="toCompareContent.jsp?NUM=5" class="compareA"><li class="compareli">FIRST</li></a>
            <a href="toCompareContent.jsp?NUM=6" class="compareA"><li class="compareli">SECOND</li></a>
            <a href="toCompareContent.jsp?NUM=7" class="compareA"><li class="compareli">THIRD</li></a>
            <a href="toCompareContent.jsp?NUM=8" class="compareA"><li class="compareli">FOURTH</li></a>
            <a href="toCompareContent.jsp?NUM=9" class="compareA"><li class="compareli">THIRD</li></a>
            <a href="toCompareContent.jsp?NUM=10" class="compareA"><li class="compareli">FOURTH</li></a>
          </ul>
        </td>
      </tr>
      <tr class="compareTr">
        <td id="compareSF" colspan="4"><jsp:include page="<%= comparePage %>" flush="flashed"/></td>
        <!-- <td id="compareREAL" colspan="2"></td> -->
      </tr>
    </table>
  </body>
</html>

toCompareContent.jsp

如果单击内部框架表中的LI，则会加载 toCompareContent.jsp 。我也在这里使用JSP操作标签。 我认为此代码有问题

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>

<jsp:forward page="compare.jsp">
    <jsp:param name="COMPAREPAGE" value="compareContent.jsp"/>
</jsp:forward>

compareContent.jsp

此内容必须在内部框架 compare.jsp TD

中显示

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
    <%
        String num = request.getParameter("NUM");
    %>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
<%if(num == null){ %>
    this is test page
    <% } else { %> <%= num %>
    <% } %>
</body>
</html>

JSP操作标记<jsp：include>不起作用