jsp:setProperty的问题！

Question

Try:
<jsp:useBean id="page" scope="page" class="bbs.page">
       <jsp:setProperty name="page" property="boardid" value="<%=request.getParameter("boardid")%>" />
</jsp:useBean>
OR:
<jsp:useBean id="page" scope="page" class="bbs.page">
       <jsp:setProperty name="page" property="*"/>
</jsp:useBean>
有必要轉換數據類型嗎？

Answer 1

<jsp:setProperty name="page" property="boardid" value="<%=boardid%>" />
value的值只能是字符串常量，对Jsp标签好象不能进行变量赋值。你只能用第二种方法。

Answer 2

<jsp:useBean id="page" scope="page" class="bbs.page" />
<%
String boardid=request.getParameter("boardid");
%>
<jsp:setProperty name="page" property="boardid" value="<%=Integer.parseInt(boardid)%>" />

Answer 3

<jsp:useBean id="page" scope="page" class="bbs.page" />
<%
String boardid=request.getParameter("boardid");
%>
<jsp:setProperty name="page" property="boardid" value="<%=Integer.parseInt(boardid)%>" />