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我在将数据从servlet发送到JSP时遇到问题。将数据从servlet发送到JSP
我的数据来自用户表单,我修改并尝试将其发送到输出页面,但发送的值与输入页面上获得的值相同。
当调试时,我看到地图中的变量和更新的变量(在服务方法的引擎下创建的),所以我确信问题在于我试图将数据发送到输出页面的方式。
我的servlet:
public class OpportunityCost extends HttpServlet {
private static final long serialVersionUID = 1L;
protected void service(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
if (request.getParameter("purchasePrice") == null) {
getServletContext().getRequestDispatcher("/index.jsp").forward(request, response);
return;
}
String iPurchasePrice = request.getParameter("purchasePrice");
double purchasePrice = Double.parseDouble(iPurchasePrice);
purchasePrice = purchasePrice * 100;
request.setAttribute("purchasePrice", purchasePrice);
getServletContext().getRequestDispatcher("/output.jsp").forward(request, response);
}
}
输入代码:
<form action="OpportunityCost" method="get">
<table border="0">
<tr>
<td> Home Purchase Price*: <input type="text" value="1" name="purchasePrice" /></td>
</tr>
<tr>
<td colspan=2"> <input type="submit" value="submit" /> </td>
</tr>
</table>
输出代码:
String finalPrice = request.getParameter("purchasePrice"); %>
<%= finalPrice %>
任何想法,我做错了吗?
您的设置request.setAttribute,但尝试显示request.getParameter –
非常感谢! – Merch