Servlet将数据传递给JSP

Question

我有一个servlet，它完成所有后端提取并传递数据以呈现jsp。

request.setAttribute("name", "ASDADAS");
request.getRequestDispatcher("/home.jsp").forward(request, response);

在我的home.jsp中，我将值称为

<%= request.getAttribute("name")%>

但是我仍然收到下面的错误

java.io.IOException: Error - getOutputStream() called on a request that has already returned a Writer - enable debug logging on com.isomorphic.servlet.ProxyHttpServletResponse to see a stack trace of the previous caller.

Answer 1

更好的使用方式

response.sendRedirect（“ / home.jsp”）;

它将正常工作

Answer 2

更好的使用方式

response.sendRedirect（“ / home.jsp”）;

它将正常工作

//System.out.println("username"+request.getParameter("username")+"password"+request.getParameter("password"));
    request.setAttribute("username", request.getParameter("username"));
    RequestDispatcher rd = request.getRequestDispatcher("home.jsp");
    rd.forward(request, response);