本人用SHH+AJAX做了一个联动下拉列表,但是只能获取8次xml,第八次以后就取不到了,MyEclipe不报任何错误,而且tomcat的访问速度慢的可怕,几乎没有,这是怎么回事?
不要说是页面有问题,因为在八次以前我能正常执行插入操作,大侠们,快帮帮我!
这是Action里的代码public ActionForward getCityByProv(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response) {
try{ response.setContentType("text/xml;charset=UTF-8");
response.setHeader("Cache-Control", "no-cache");
response.setDateHeader( "Expires ", 0);
response.setHeader( "Pragma ","no-cache ");
StringBuffer sb = new StringBuffer("<?xml version=\"1.0\" encoding=\"utf-8\"?>\n");
sb.append("<members>");
PrintWriter out = response.getWriter();
String provID = request.getParameter("provID");
list = this.pdao.getCityByPID(provID);
it = list.iterator();
while(it.hasNext()){
City city = (City)it.next();
sb.append("<member><id>"+city.getCityId()+"</id><name>"+city.getCityName()+"</name></member>");
}
sb.append("</members>");
out.write(sb.toString());
//System.out.println(sb);
out.flush();
out.close();
return null;
}catch(Exception e){
e.printStackTrace();
request.setAttribute("error", "获取城市列表数据失败");
return mapping.findForward("fail");
}
}
我用断点调试,每次程序终止前执行的最后一条语句总是获取list的那一句,无论我把它放在哪里,找了好几天,都没有找到究竟是哪里错了,真是郁闷死了
不要说是页面有问题,因为在八次以前我能正常执行插入操作,大侠们,快帮帮我!
这是Action里的代码public ActionForward getCityByProv(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response) {
try{ response.setContentType("text/xml;charset=UTF-8");
response.setHeader("Cache-Control", "no-cache");
response.setDateHeader( "Expires ", 0);
response.setHeader( "Pragma ","no-cache ");
StringBuffer sb = new StringBuffer("<?xml version=\"1.0\" encoding=\"utf-8\"?>\n");
sb.append("<members>");
PrintWriter out = response.getWriter();
String provID = request.getParameter("provID");
list = this.pdao.getCityByPID(provID);
it = list.iterator();
while(it.hasNext()){
City city = (City)it.next();
sb.append("<member><id>"+city.getCityId()+"</id><name>"+city.getCityName()+"</name></member>");
}
sb.append("</members>");
out.write(sb.toString());
//System.out.println(sb);
out.flush();
out.close();
return null;
}catch(Exception e){
e.printStackTrace();
request.setAttribute("error", "获取城市列表数据失败");
return mapping.findForward("fail");
}
}
我用断点调试,每次程序终止前执行的最后一条语句总是获取list的那一句,无论我把它放在哪里,找了好几天,都没有找到究竟是哪里错了,真是郁闷死了
~~~~~散粉~~~~~~~~~~~