JSP一些标签, 对应的 java代码

1.

<jsp:useBran id="cb" class="bean.CounterBean" >

</jsp:useBean>

 

对应代码： <%CounterBean cb = new CounterBean();%>

 

2.

<jsp:setProperty name ="cb" property="count" value = "23"/> 对应代码：

<%-- cb.setCount(Integer.paseInt("23"))- -%>

 

3.

<jsp:setProperty name ="cb" property="count" 对应代码：

<%--  out.print(cb.getCount())--%>

 

 

 

4.(重点) <jsp:useBean  id = "counterBean"

                                    scope = "request"
                                    class = "bean.CounterBean" />

 

对应代码：

 

<% bean.CouterBean counterBean = (bean.CouterBean)request.getAttribute("counterBean");

if(counterBean = null){

  counterBean = new bean.CounterBean();

  request.SetAttribute("counterBean",counterBean)