java - 使用 RequestDispatcher 发送变量值时出现问题

Question

在变量 search_for 中，我得到了我正在搜索的值的字符串值。但我无法通过 RequestDispatcher 将其传递给 jsp。我做错了什么？

RequestDispatcher rd = request.getRequestDispatcher("my.jsp?search_for"); 

Answer 1

苏1:

request.setAttribute("paramName", search_for);
RequestDispatcher rd = request.getRequestDispatcher("my.jsp");
rd.forward(request, response);

或

方案 2:

RequestDispatcher rd = request.getRequestDispatcher("my.jsp?paramName="+search_for);
rd.forward(request, response);