Ajax

js:
sendRequest();
//发送请求函数 id=402880b2223e5afb01223e5cc8c10001 402880b2223e203901223e22e8b70001
function sendRequest() {
var id = document.getElementById("articlesid").value;
var url="/articles.do?method=getArticlesByKeywords&id="+id;
createXMLHttpRequest();
XMLHttpReq.open("GET", url, true);
XMLHttpReq.onreadystatechange = returnResult;//指定响应函数
XMLHttpReq.send(null);  // 发送请求
}
//创建XMLHttpRequest对象      
    function createXMLHttpRequest() {
if(window.XMLHttpRequest) { //Mozilla 浏览器
XMLHttpReq = new XMLHttpRequest();
}
else if (window.ActiveXObject) { // IE浏览器
try {
XMLHttpReq = new ActiveXObject("Msxml2.XMLHTTP");
} catch (e) {
try {
XMLHttpReq = new ActiveXObject("Microsoft.XMLHTTP");
} catch (e) {}
}
}
}

function returnResult(request)
{
    if (XMLHttpReq.readyState == 4) { // 判断对象状态
        if (XMLHttpReq.status == 200) { // 信息已经成功返回，开始处理信息
view();
    } else { //页面不正常
      alert("您所请求的页面有异常。");
    }
        }
}

var htm="";

function view(){

var titles = XMLHttpReq.responseXML.getElementsByTagName("titles");
var position = XMLHttpReq.responseXML.getElementsByTagName("position");
htm = htm + "        <div class=\"LeftBox05_Doublt\">";
htm = htm + "          <ul>";
if(titles!=null && titles.length>0){
var len=titles.length;
if(titles.length>6){
len=6;
}
for(var i = 0 ; i < len ; i ++){
var t = titles[i].firstChild.data;
var p = position[i].firstChild.data;
var l = t.length;
var str="...";
if(t.length > 22){
l = 22;
htm = htm + " <li><a  href='"+p+"'>" + (t.substring(0,l)+str) + "</a></li> ";
}
else
{
htm=htm+" <li><a  href='"+p+"'>" + t + "</a></li> ";
}

}
for(var j=0;j<6-len;j++){
htm = htm + " <li><a  href=\"\"  title=\"\">&nbsp;<\/a><span><\/span><\/li>";
}
}
else
{
for(var j=0;j<6;j++){
htm = htm + " <li><a  href=\"\"  title=\"\">&nbsp;<\/a><span><\/span><\/li>";
}
}
htm=htm+" <\/ul>";
htm=htm+" <\/div>";

document.write(htm);
//document.getElementById("dd").innerHTML=document.getElementById("dd").innerHTML+htm;

}

java:

   public void getArticlesByKeywords(ActionMapping mapping,
            ActionForm form, HttpServletRequest request,
            HttpServletResponse response) throws Exception {
        String articleid = request.getParameter("id");
       
        ArticleColumnManager articleColumnManager = (ArticleColumnManager) getBean("articleColumnManager");
        ArticlesManager mgr = (ArticlesManager) getBean("articlesManager");
        Articles articles =  mgr.getArticle(articleid);
        List list = articleColumnManager.getArticlesByKeywords(articles);
        //======ajax========
        response.setContentType("application/xml; charset=UTF-8");
response.setHeader("Cache-Control", "no-cache");
PrintWriter out = response.getWriter();

org.dom4j.Document doc = org.dom4j.DocumentHelper.createDocument();
org.dom4j.Element root = doc.addElement("response");

if(list!=null && list.size()!=0){
for(int i=0;i<list.size();i++){
Articlescolumn articlescolumn = (Articlescolumn) list.get(i);
System.out.println(articlescolumn.getId().getArticles().getTitles());
root.addElement("titles").setText(articlescolumn.getId().getArticles().getTitles());
String position = articlescolumn.getId().getCmscolumn().getCcolumnename()+"/"+articlescolumn.getId().getArticles().getArticleid()+".html";
root.addElement("position").setText(position);
}
}

String XMLcontent = getXMLString(doc).toString();
out.print(XMLcontent);
    }