jsp servlet框架参数传递及控制器转发，重定向代码

场景描述：根据URL传递来的参数，请求的jsp页面获取参数值，http://localhost:8083/myJsp.jsp?mid=1020

http://localhost:8083/myJsp?mid=1020(请求servlet)

jsp脚本标记<%%>

jsp输出标记<%=输出内容%> <% out.println("输出内容");%>

MyJsp.jsp jsp页面获取参数值并输出：

<%
String mid = request.getParameter("mid"); //可以获取getAttribute值。
out.println("mid:" + mid);
%>

<%
//String mid2 = (String)request.getAttribute("mid");
//out.println("mid2:" + mid2);
%>

MyJsp.java servlet获取参数并转发

public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {

String mid = request.getParameter("mid");
System.out.println("mid:" +  mid);
request.setAttribute("mid", mid);

//转发
RequestDispatcher rd = this.getServletContext().getRequestDispatcher("/MyJsp.jsp");
rd.forward(request, response);

//重定向
//		response.sendRedirect("/MyJsp.jsp");

}

web.xml

<servlet>
<servlet-name>MyJsp</servlet-name>
<servlet-class>com.sms.test.MyJsp</servlet-class>
</servlet>

<servlet-mapping>
<servlet-name>MyJsp</servlet-name>
<url-pattern>/MyJsp</url-pattern>
</servlet-mapping>