Servlet及Jsp

public class LoginServlet extends HttpServlet{
/**
* 
*/
private static final long serialVersionUID = 1L;


public void doGet(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException {
req.setCharacterEncoding("UTF-8");
commonDo(req, resp);
}


public void doPost(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException {
req.setCharacterEncoding("UTF-8");
commonDo(req, resp);
}

public void commonDo(HttpServletRequest request,

HttpServletResponse response) throws ServletException, IOException {
HttpSession session = request.getSession();
String url = (String) request.getParameter("url");
session.setAttribute("url", url);
response.sendRedirect("showServletContext.jsp");

}

图片显示

<img border="0" src="<%=session.getAttribute("url") %>" width="200" height="250"> 

 <servlet>
  <servlet-name>Login</servlet-name>
  <servlet-class>xiayu.servlet.LoginServlet</servlet-class>
 </servlet>
 <servlet-mapping>
  <servlet-name>Login</servlet-name>
  <url-pattern>/login</url-pattern>
 </servlet-mapping>

访问

http://localhost:7001/xyServlet/login?url=F:\\nm2.jpg