简单的Ajax+Struts

//实现联动JS
function createXMLHttpRequest(){
if(window.XMLHttpRequest){
xmlHttp = new XMLHttpRequest();
} else if(window.ActiveXObject){
xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
} else {
xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
}
function GetResult(str) {
createXMLHttpRequest();

var url = "ciCustAccAction.do?operAtt=queryInfo&name="+str;
url = encodeURI(url);
url = encodeURI(url);
xmlHttp.open("GET",url,false);
xmlHttp.send();
BuildSel(xmlHttp.responseText,document.all.sel2);

}
function BuildSel(str,sel) {
if(xmlHttp.readyState == 4){
if(xmlHttp.status == 200){
sel.options.length=0;
var arrstr = new Array();
arrstr = str.split(",");
for(var i=0;i<arrstr.length;i++) {
sel.options[sel.options.length]=new Option(arrstr[i],arrstr[i]) ;
}
}
}
}

Struts中方法：
public ActionForward queryInfo(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response) {
//获取请求中传值
String name = request.getParameter("name");
try {
// 中间用ISO-8859-1过渡
byte[] b = name.getBytes("ISO-8859-1");
// 转换成GB2312字符
// name = new String(b, "GB2312");
name = java.net.URLDecoder.decode(name, "UTF-8");
} catch (Exception e) {
e.printStackTrace();
}
String returnName = getSel(name);
try {
response.setContentType("text/xml;charset=UTF-8");
response.setHeader("Cache-Control", "no-cache");
request.setCharacterEncoding("UTF-8");
response.getWriter().print(returnName);

} catch (IOException ex) {
ex.printStackTrace();
}
return null;
}
//返回值到JS中
public String getSel(String name) {
if (name != null && ("1").equals(name)) {
return ("快钱");
}
if (name != null && ("2").equals(name)) {
// 操作数据库进行查询

return

("工商银行,农业银行");
}
return "";
}