求一段ajax通过json传递数组时的后台代码,和前台就收json并解析的代码
求一段ajax通过json传递数组时的后台代码,和前台就收json并解析的代码,没弄过,想研究一下,但是网上搜不到合适的,都是用jquery弄得,我想要不用jquery的 所有分都给你 如果给我的代码合适
[解决办法]
public class Test3 {
public static void main(String[] args) {
String json = "{'num':11,'org':{'orgId':'orgId','orgName':'orgName'},'biz':" +
"[{'appcode':55,'subscode':'subscode0'},{'appcode':66,'subscode':'subscode1'}]}";
JSONObject jo = JSONObject.fromObject(json);
System.out.println(jo.get("num"));
JSONObject orgJson= jo.getJSONObject("org");
System.out.println(orgJson);
System.out.println(orgJson.get("orgId"));
JSONArray bizJson= jo.getJSONArray("biz");
System.out.println(bizJson.getJSONObject(0).get("appcode"));
}
}
public void doPost(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException {
req.setCharacterEncoding("UTF-8");
ChatDao cd=new ChatDao();
List<Chat> chatList=new ArrayList<Chat>();
chatList=cd.chatList();
JSONArray json=JSONArray.fromObject(chatList);
resp.setContentType("text/html;charset=UTF-8");
PrintWriter out=resp.getWriter();
out.println(json.toString());
}
<script type="text/javascript">
var xhq;
var input;
//创建XMLHttpRequest对象
function createXMLHttpRequest(){
if(window.XMLHttpRequest){
xhq=new XMLHttpRequest();
}else if(window.ActiveXObject){
try{
xhq=new ActiveXObject("Msxml2.XMLHTTP");
}catch(e){
try{
xhq=new ActiveXObject("Microsoft.XMLHTTP");
}catch(e){
}
}
}
}
//发送数据到服务器
function sendRequest(){
createXMLHttpRequest();
var url="ChatServlet";
//通过open方法取得与服务器的连接
//发送post请求
xhq.open("POST",url,true);
//设置请求头,发送post时需要该请求头
xhq.setRequestHeader("Content-Type","application/x-www-form-urlencoded");
xhq.onreadystatechange=processResponse;
xhq.send(null);
}
function processResponse(){
if(xhq.readyState==4){
if(xhq.status==200){
var chatList=eval("("+xhq.responseText+")");
var chat1="";
var chat2;
var id;
for(var i=0;i<chatList.length;i++){
id=i+1;
chat2="<tr><td width='25%'>"+id+"</td>"+"<td width='25%'>"+chatList[i].owner+"</td>"+"<td width='25%'>"+chatList[i].content+"</td></tr>";
chat1=chat1+chat2;
}
document.getElementById("chat").innerHTML=chat1;
}else{
window.alert("您所请求的页面异常!");
}
}
}
</script>