AJAX

<pre name="code" class="java">public class test extends HttpServlet {public boolean isExist(String name){boolean flag=false;String []names={"test1","test2","test3"};for(String s:names){if(name.equals(s)) flag=true;}return flag;}public void doGet(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {this.doPost(request, response);}public void doPost(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {response.setContentType("text/html;charset=utf-8");PrintWriter out = response.getWriter();String username=request.getParameter("uname");username = java.net.URLDecoder.decode(username, "UTF-8");//一次解码System.out.println(username);boolean flag=isExist(username);out.println(flag);out.flush();out.close();}}