轉(zhuǎn)發(fā)和重定向

轉(zhuǎn)發(fā)和重定向一、轉(zhuǎn)發(fā)2由一個(gè)

Servlet/jsp跳轉(zhuǎn)到另一個(gè)Servlet/jsp進(jìn)行操作，叫請(qǐng)求轉(zhuǎn)發(fā)。request.getRequestDispatcher(Stringurl).forward(request,response)login.html關(guān)鍵代碼：<formmethod="post"action="doLogin.jsp">賬號(hào)：<inputtype="text"name="uname"/><br>密碼：<inputtype="password"name="pwd"/><inputtype="submit"value="登錄"/></form>doLogin.jsp關(guān)鍵代碼：<%Stringname=request.getParameter("uname");Stringpwd=request.getParameter("pwd");if(name.equals("admin")&&pwd.equals("123456")){request.getRequestDispatcher("welcome.jsp").forward(request,response);}else{response.sendRedirect("login.jsp");}%>一、轉(zhuǎn)發(fā)3welcome.jsp關(guān)鍵代碼：<%Stringname=request.getParameter("uname");%><%=name%>歡迎您的到來(lái)！二、重定向4服務(wù)器引導(dǎo)客戶端重新請(qǐng)求另一個(gè)頁(yè)面，即重定向。實(shí)現(xiàn)方式：調(diào)用response對(duì)象的sendRedirect(Stringurl)方法。login.html關(guān)鍵代碼：<formmethod="post"action="doLogin.jsp">賬號(hào)：<inputtype="text"name="uname"/><br>密碼：<inputtype="password"name="pwd"/><inputtype="submit"value="登錄"/></form>doLogin.jsp關(guān)鍵代碼：<%Stringname=request.getParameter("uname");Stringpwd=request.getParameter("pwd");if(name.equals("admin")&&pwd.equals("123456")){response.sendRedirect(“welcome.jsp");}else{response.sendRedirect("login.jsp");}%>二、重定向5welcome.jsp關(guān)鍵代碼：<%Stringname=request.getParameter("uname");%><%=name%>歡迎您的到來(lái)！三、轉(zhuǎn)發(fā)重定向區(qū)別61.轉(zhuǎn)發(fā)在服務(wù)器端完成，重定向在客戶端完成。2.轉(zhuǎn)發(fā)后地址欄不會(huì)改變，重定向后地址欄會(huì)改變。3.轉(zhuǎn)發(fā)的調(diào)用者與被調(diào)用者共享相同的request和response