JavaEE深入学习系列(1)

半个小时的成果,却被Csdn请重新提交,把我的文字全部清空了.

所以我就简单介绍我刚才要写的.

主要是想说明重定向和请求转发

protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
String query = request.getParameter("wd");
String start = request.getParameter("start");
//省略若干
request.getRequestDispatcher("/search.jsp").forward(request, response);
response.sendRedirect(request.getContextPath()+"/search.jsp");
response.sendRedirect("http://sina.com.cn/");
}
request.getRequestDispatcher(url)和ServletContext获得Dispatcher唯一区别就是request能使用相对路径作为url