JSP页面上通过JS实现消息弹出框，样式可根据要求修改，这边只是一个简单的示范例子，自定义了两条消息，弹框效果如下
JSP页面
<%@ page language="java" import="java.util.*" pageEncoding="gb2312"%>
<%@page import="java.util.*"%>
<html>
<head>
<style type="text/css">
#winpop { width:250px; height:0px; position:absolute; right:0; bottom:0; border:1px solid grey; margin:0; padding:1px; overflow:hidden; display:none; background:#FFFFFF}
#winpop .title { width:100%; height:20px; line-height:20px; background:#0AB0FF ; font-weight:bold; text-align:center; font-size:12px;color:white}
#winpop .con { width:100%; height:360px; line-height:80px; font-weight:bold; font-size:12px; color:#FF0000; text-decoration:underline; text-align:center}
.close { position:absolute; right:4px; top:-1px; color:#FFFFFF; cursor:pointer}
</style>
</head>
<%
//未读消息unreadList根据实际情况取
List<Map> unreadList = new ArrayList<Map>();
Map<String,String> map1=new HashMap<String,String>();
map1.put("msgId","1");
map1.put("msgContent","message111111");
unreadList.add(map1);
Map<String,String> map2=new HashMap<String,String>();
map2.put("msgId","2");
map2.put("msgContent","message222222");
unreadList.add(map2);
int num=unreadList.size();
%>
<body>
<script language="javascript" type="text/javascript">
window.onload = function tanchuang() { //加载
document.getElementById('winpop').style.height = '0px';//要初始化这个高度,虽然CSS里已经初始化了
setTimeout("tips_pop()",0); //调用tips_pop()这个函数
}
function tips_pop() {
var MsgPop = document.getElementById("winpop");//获取窗口这个对象,即ID为winpop的对象
var popH = parseInt(MsgPop.style.height);//用parseInt将对象的高度转化为数字,以方便下面比较
if (popH == 0) { //如果窗口的高度是0
MsgPop.style.display = "block";//那么将隐藏的窗口显示出来
show = setInterval("changeH('up')", 2);//开始以每0.002秒调用函数changeH("up"),即每0.002秒向上移动一次
} else { //否则
hide = setInterval("changeH('down')", 2);//开始以每0.002秒调用函数changeH("down"),即每0.002秒向下移动一次
}
}
function changeH(str) {
var MsgPop = document.getElementById("winpop");
var popH = parseInt(MsgPop.style.height);
if (str == "up") { //如果这个参数是UP
if (popH <= 100) { //如果转化为数值的高度小于等于100
MsgPop.style.height = (popH + 4).toString() + "px";//高度增加4个象素
} else {
clearInterval(show);//否则就取消这个函数调用,意思就是如果高度超过100象度了,就不再增长了
}
}
if (str == "down") {
if (popH >= 4) { //如果这个参数是down
MsgPop.style.height = (popH - 4).toString() + "px";//那么窗口的高度减少4个象素
} else { //否则
clearInterval(hide); //否则就取消这个函数调用,意思就是如果高度小于4个象度的时候,就不再减了
MsgPop.style.display = "none"; //因为窗口有边框,所以还是可以看见1~2象素没缩进去,这时候就把DIV隐藏掉
}
}
}
</script>
<%if(num>0){ %>
<div id="winpop">
<div class="title" >系统信息<br>
共有<font color="red"><big><%=num %></big></font>条未读消息
<span class="close" οnclick="tips_pop()">X</span></div>
<%for(int i=0;i<num;i++) { %>
<!-- 点击信息标题链接到信息明细，传递信息编号参数 -->
<a href="/XXXAction.do?msgId=<%=unreadList.get(i).get("msgId") %>">
<%if(String.valueOf(unreadList.get(i).get("msgContent")).length()>16) {%>
<%=String.valueOf(unreadList.get(i).get("msgContent")).substring(0,16)+"..." %>
<%} else{ %>
<%=String.valueOf(unreadList.get(i).get("msgContent")) %>
<%} %>
</a><br>
<%
if(i>=1){//最多显示两条
break;
}
} %>
<center>
<!-- 点击查看更多未读消息 -->
<a href="/XXXAction.do %>" ><font color="red">更多未读消息...</font></a></center>
</div>
<%} %>
</body>
</html>
