请教一个js访问Action的问题 你可以直接定时用ajax去数据读取数据有新邮件就返回显示即可。 解决方案 » 免费领取超大流量手机卡,每月29元包185G流量+100分钟通话, 中国电信官方发货 我会用定时调用function,可是我不知道怎么在funtion里面去调用action,别人说用ajax,我不怎么会,清告诉一下吧谢谢 [code=HTML][/co<html><head><meta http-equiv="Content-Type" content="text/html; charset=gb2312" /><title>AJAX简单应用</title><script language="javascript">//创建XMLHttpRequest对象var request = false;try {request = new XMLHttpRequest();} catch (trymicrosoft) {try {request = new ActiveXObject("Msxml2.XMLHTTP");} catch (othermicrosoft) {try {request = new ActiveXObject("Microsoft.XMLHTTP");} catch (failed) {request = false;}}}if (!request)alert("Error initializing XMLHttpRequest!");//获取信息function getInfo() {var url = "info.asp?id=" + Math.random();request.open("GET", url, true);request.onreadystatechange = updatePage;request.send(null);}//更新页面function updatePage() {if (request.readyState == 4) {if (request.status == 200) {var response = request.responseText;document.getElementById("div1").innerText = response;}else if(request.status == 404) {alert ("Requested URL is not found.");} else if (request.status == 403) {alert("Access denied.");} elsealert("status is " + request.status);}}</script></head><body><input name="btn" type="button" id="btn" value="获取" onclick="getInfo();" /><div id="div1">此处显示新 Div 标签的内容</div></body></html>de] 谢谢各位已经有了解决方法了,今天下午我终于给弄出来了。 是这样写的: Action里面 public ActionForward execute(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response) { try { response.setContentType("text/html"); PrintWriter out = response.getWriter(); MessageForm messageForm = (MessageForm)form; UserBean userBean = (UserBean)request.getSession().getAttribute("userBean");//得到用户信息的JavaBean List list = ims.ifMessage(Integer.parseInt(userBean.getUser_dwid()));//这个方法为显示状态为未读的信息列表; //如果有信息,则输出信息的id号;否则则输出0 if(list.size()>0){ DccMessage dccMessage = (DccMessage)list.get(0); out.print(dccMessage.getId()); }else{ out.print("0"); } } catch (Exception e) { // TODO Auto-generated catch block e.printStackTrace(); } return null;JSP里面的Javascript 引用了prototype1.4.js<script type="text/javascript">setInterval("showMessage()", 30000);//每隔30秒执行一次//定义Ajaxfunction showMessage(){new Ajax.Request("/DCCCZXT/message/ifMessageAction.do",{method:'get',onComplete:po});}//如果接收到Action里面out出来的值为非0的情况下,则打开该新消息的窗口function po(res){var a=res.responseTextif(a!=0){ window.open("/DCCCZXT/message/openMessageAction.do?id="+res.responseText,"","width=320,height=400");}}</script> 谁能告诉我,网页是怎么获取唯一ID的 同时用setTimeout()刷新几个页面该怎么做? 关于css圆角的矩形制作 真受不了了,帮帮我。。。 菜鸟问题,我晕了 为什么执行不了,是不是跟attachEvent有关??? 怎么用JavaScript制作右键菜单,和在网页中移动层 如何验证表单? 如何让层不随鼠标移动? IE5 不支持的事件啊,怎样解决? 为什么我点击 确认 和取消都要执行?action=DelAll&api_key=${api_key}' 这个语句呀大家帮我解决一下吧? 高手请时,求一显示效果
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>AJAX简单应用</title>
<script language="javascript">
//创建XMLHttpRequest对象
var request = false;
try {
request = new XMLHttpRequest();
} catch (trymicrosoft) {
try {
request = new ActiveXObject("Msxml2.XMLHTTP");
} catch (othermicrosoft) {
try {
request = new ActiveXObject("Microsoft.XMLHTTP");
} catch (failed) {
request = false;
}
}
}
if (!request)alert("Error initializing XMLHttpRequest!");
//获取信息
function getInfo() {
var url = "info.asp?id=" + Math.random();
request.open("GET", url, true);
request.onreadystatechange = updatePage;
request.send(null);
}
//更新页面
function updatePage() {
if (request.readyState == 4) {
if (request.status == 200) {
var response = request.responseText;
document.getElementById("div1").innerText = response;
}else if(request.status == 404) {
alert ("Requested URL is not found.");
} else if (request.status == 403) {
alert("Access denied.");
} else
alert("status is " + request.status);
}
}
</script>
</head>
<body>
<input name="btn" type="button" id="btn" value="获取" onclick="getInfo();" />
<div id="div1">此处显示新 Div 标签的内容</div>
</body>
</html>de]
public ActionForward execute(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response) {
try {
response.setContentType("text/html");
PrintWriter out = response.getWriter();
MessageForm messageForm = (MessageForm)form; UserBean userBean = (UserBean)request.getSession().getAttribute("userBean");//得到用户信息的JavaBean List list = ims.ifMessage(Integer.parseInt(userBean.getUser_dwid()));//这个方法为显示状态为未读的信息列表; //如果有信息,则输出信息的id号;否则则输出0
if(list.size()>0){
DccMessage dccMessage = (DccMessage)list.get(0);
out.print(dccMessage.getId());
}else{
out.print("0");
}
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return null;JSP里面的Javascript 引用了prototype1.4.js<script type="text/javascript">
setInterval("showMessage()", 30000);//每隔30秒执行一次//定义Ajax
function showMessage(){
new Ajax.Request("/DCCCZXT/message/ifMessageAction.do",{method:'get',onComplete:po});
}//如果接收到Action里面out出来的值为非0的情况下,则打开该新消息的窗口
function po(res){
var a=res.responseText
if(a!=0){
window.open("/DCCCZXT/message/openMessageAction.do?id="+res.responseText,"","width=320,height=400");
}
}</script>