server端返回的数据例如以下：
{"list":[{"id":1,"name":"汉族"},{"id":2,"name":"蒙古族"},{"id":3,"name":"满族"},{"id":4,"name":"朝鲜族"},{"id":5,"name":"赫哲族"},{"id":6,"name":"达斡尔族"},{"id":7,"name":"鄂温克族"},{"id":8,"name":"鄂伦春族"},{"id":9,"name":"回族"},{"id":10,"name":"东乡族"},{"id":11,"name":"土族"},{"id":12,"name":"撒拉族"},{"id":13,"name":"保安族"},{"id":14,"name":"裕固族"},{"id":15,"name":"维吾尔族"},{"id":16,"name":"哈萨克族"},{"id":17,"name":"柯尔克孜族"},{"id":18,"name":"锡伯族"},{"id":19,"name":"塔吉克族"},{"id":20,"name":"乌孜别克族"},{"id":21,"name":"俄罗斯族"},{"id":22,"name":"塔塔尔族"},{"id":23,"name":"藏族"},{"id":24,"name":"门巴族"},{"id":25,"name":"珞巴族"},{"id":26,"name":"羌族"},{"id":27,"name":"彝族"},{"id":28,"name":"白族"},{"id":29,"name":"哈尼族"},{"id":30,"name":"傣族"},{"id":31,"name":"僳僳族"},{"id":32,"name":"佤族"},{"id":33,"name":"拉祜族"},{"id":34,"name":"纳西族"},{"id":35,"name":"景颇族"},{"id":36,"name":"布朗族"},{"id":37,"name":"阿昌族"},{"id":38,"name":"普米族"},{"id":39,"name":"怒族"},{"id":40,"name":"德昂族"},{"id":41,"name":"独龙族"},{"id":42,"name":"基诺族"},{"id":43,"name":"苗族"},{"id":44,"name":"布依族"},{"id":45,"name":"侗族"},{"id":46,"name":"水族"},{"id":47,"name":"仡佬族"},{"id":48,"name":"壮族"},{"id":49,"name":"瑶族"},{"id":50,"name":"仫佬族"},{"id":51,"name":"毛南族"},{"id":52,"name":"京族"},{"id":53,"name":"土家族"},{"id":54,"name":"黎族"},{"id":55,"name":"畲族"},{"id":56,"name":"高山族"},{"id":57,"name":"穿青人"}],"success":"true"}
jsp代码：
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<script type="text/javascript">
function createXMLHttpRequest() {
var xmlHttp;
try {
xmlHttp = new XMLHttpRequest();
} catch (e) {
try {
xmlHttp = new ActiveXObject("Msxml2.XMLHTTP");
} catch (e) {
xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
}
}
return xmlHttp;
}
function handle() {
if (xmlHttp.readyState == 4 && xmlHttp.status == 200) {
var t = xmlHttp.responseText;
t = eval('('+t+')');
var data = t.list;
for(var o in data ){
alert(o);
alert(data[o].name);
}
}
}
var xmlHttp = createXMLHttpRequest();
xmlHttp.open("POST", "nation.do", true);
xmlHttp.onreadystatechange = handle;
xmlHttp.send(null);
</script>
<body>
<form></form>
</body>
</html>