java变量传值到JS，和JS变量传值到JS字符串中

1、JS变量传值到js

待补

 

 

2、java变量传值到js

JSP和JS分来在两个文件中

JSP中

<script type="text/javascript">
var contentPath = "<%=basePath%>";
</script>

<script type="text/javascript" src="<%=basePath%>js/main.js"></script>

JS中

$.ajax( {
    type : "POST",
    url : contentPath + "linejson.action",
    data : "type=totalfuhe&time=" + time,
    dataType : 'json',

 

注意上面一段代码一定要放在JSP引用的JS之前，JS引用时有顺序的

 

重点来了：

<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
UserBean loginUser=(UserBean)request.getSession().getAttribute("user");
String treeData="";
if(request.getAttribute("treedata").toString()!=null){
 treeData=request.getAttribute("treedata").toString();
System.out.print(treeData);
}

%>

 

 <script>
    var setting = { };
    var zNodes=<%= treeData %>;  一定要给String treeData="";或者String treeData=null;否则会报

jsThe local variable treeData may not have been initialized

</script>