<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->
<script type="text/javascript">
function loadXMLDoc()
{
xmlhttp = null;
var country = document.getElementById("country");
country.length = 1;
country.selectedIndex = 0;
var province = document.getElementById("province");
if(province.value == ""){
return ;
}
var url="http://localhost:8080/Ajax_Province/GetProvince?&province="+encodeURIComponent(province.value);
if (window.XMLHttpRequest) {// code for Firefox, Mozilla, IE7, etc.
xmlhttp = new XMLHttpRequest();
} else if (window.ActiveXObject) {// code for IE6, IE5
xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
}
if (xmlhttp != null) {
xmlhttp.onreadystatechange = state_Change;
xmlhttp.open("post", url, true);
xmlhttp.send(null);
} else {
alert("Your browser does not support XMLHTTP.");
}
}
function state_Change() {
var province = document.getElementById("province");
var country = document.getElementById("country");
if (xmlhttp.readyState == 4&&xmlhttp.status == 200) {// 4 = "loaded"
var serviceData = xmlhttp.responseText;
if(serviceData == null||serviceData == ""){
return;
}
var s = serviceData.split(",");
for(var i=0;i<s.length-1;i++){
country.options[i+1] = new Option(s[i],s[i]);
}
}
}
/**
* Constructor of the object.
*/
public GetProvince() {
super();
}
/**
* Destruction of the servlet. <br>
*/
public void destroy() {
super.destroy(); // Just puts "destroy" string in log
// Put your code here
}
/**
* The doGet method of the servlet. <br>
*
* This method is called when a form has its tag value method equals to get.
*
* @param request the request send by the client to the server
* @param response the response send by the server to the client
* @throws ServletException if an error occurred
* @throws IOException if an error occurred
*/
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
doPost(request, response);
}
/**
* The doPost method of the servlet. <br>
*
* This method is called when a form has its tag value method equals to post.
*
* @param request the request send by the client to the server
* @param response the response send by the server to the client
* @throws ServletException if an error occurred
* @throws IOException if an error occurred
*/
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
List list = null;
ProvinceService provinceService = new ProvinceService();
request.setCharacterEncoding("utf-8");
response.setCharacterEncoding("utf-8");
String strprovince = request.getParameter("province");
if(strprovince == null||"".equals(strprovince)){
return ;
}
String province = new String(strprovince.getBytes("ISO-8859-1"),"UTF-8");
list = provinceService.getCountry(province);//这个是查询数据库的你可以换你的对数据库的操作
if(list ==null){
return;
}
StringBuffer sb = new StringBuffer();
for(int i=0;i<list.size();i++){
String s = (String)list.get(i);
sb.append(s+",");
}
response.setContentType("text/html");
PrintWriter out = response.getWriter();
out.print(sb);
out.flush();
out.close();
}
/**
* Initialization of the servlet. <br>
*
* @throws ServletException if an error occurs
*/
public void init() throws ServletException {
// Put your code here
}