Java Web 049: 使用jstl和el来修改原来的页面

1. index:jsp

原

<%
    Object user = session.getAttribute("user");
    if(user == null){
        %>
        <a href="<%=request.getContextPath()%>/login.jsp">登录</a>
        <a href="<%=request.getContextPath()%>/register.jsp">注册</a>
        <%
    }else{
        %>
        当前登录用户: ${user.username }
        <% 
    }
%>

现

 2. goods_list.jsp

原

<%
            List<Goods> list = (List<Goods>)request.getAttribute("list");
            for(Goods goods : list){
                %>
                    <tr>
                        <td><%=goods.getName() %></td>
                        <td><%=goods.getDes() %></td>
                        <td><%=goods.getPrice() %></td>
                        <td><%=goods.getInventory() %></td>
                        <td>delete modify</td>
                    </tr>
                <% 
            }
        
%>

现