Hi, Firends:
In my old web page I used a static array to hold a set of values, and now I want to use dynamic value from datbase.
I created a bean to process database data and return resultset value to an array string.
I convert my html page into jsp page, use "usebean" tag to call specific method, after done, how can I set the
resultvaule to my script variable?
It's urgent!!great thanks!
Hi ,
you can try this.
<%
String[] dataArray = resultBean.getResultSet();
%>
<script>
var jsArray = new Array( <%for(int i = 0; i < dataArray.length; i++)
{
out.print("\"" + dataArray.trim() + "\"");
if(i == (dataArray.length - 1))
out.println("");
else
out.println(",");
}
%>);
</script>
Hi, I try the codes from Priyam, it really makes sense, but within the script tag, jsp tag does not work. <%..>,
error messages comes out in that position.
and also looks like the variabes defined in jsp can not be used in <script>..</script>. how can I do?
Does it mean the jsp tag can only be used in HTML tag?
need more comments! Thanks
Hi, Jsp tags do work inside of script tags. The problem with the code sample above is a typo I believe.
dataArray.trim()
should be changed to
dataArray.trim()
The first version will cause the page not to compile because dataArray is an array of strings and does not have any methods.
You can make this code a little easire to read by changing it slightly.
<%
String[] dataArray = resultBean.getResultSet();
%>
<script>
//javascript variable
var jsArray = new Array( );
//loop through the values in the resultset and assign them to the javascript array var
<% for(int i = 0; i < dataArray.length; i++){ %>
jsArray[jsArray.length]="<%=dataArray.trim() %>";
<% } //closing the loop block%>
</script>
Note that in the above examples, the authors are trying to show an array reference based on a counter, i. Unfortunately this forum software uses [ i ] to indicate the start of an italic block, and discards the value.
Changing an i to a j gives:<%
String[] dataArray = resultBean.getResultSet();
%>
<script>
//javascript variable
var jsArray = new Array(<%=dataArray.length%>);
//loop through the values in the resultset and assign them to the javascript array var
<% for(int j = 0; j< dataArray.length; j++){ %>
jsArray[<%=j%>]="<%=dataArray[j].trim() %>";
<% } %> //closing the loop block
</script>
Give that a try and see if it works any better!
Hello,
Finally, the codes work! thanks for all the suggestion!
The most important is "J" need <%= tag too. and do not forget the double quotation mark ("") while assigning the value.
the code like following:
<jsp:useBean id="ArrayBean" class="myProj.BeanServices"
scope="page" >
</jsp:useBean>
<%! public String[] dataArray; %>
<%
dataArray = ArrayBean.getRecordsetReturn();
%>
<script language="JavaScript1.2">
var MCC = new Array(<%=dataArray.length%>);
<%for(int j =0; j < dataArray.length; j++){ %>;
MCC[<%=j%>]="<%=dataArray[j]%>";
<%}%>;
</script>
One more question:
I found on the web server, if I used the same file name (asp file and js file, html file is ok.), seems the server always used the old compiled codes ignoring the code already changed, even after re-complile. I have to change the file name again and again.
I worked on JDeveloper environment, it has a testing web server environment on my local, I am not sure if this situation will happen in the real server environment.
How can I make any new updates go into effect immidiately! Do you know web server has some configuration to handle this?
Thanks a gain!
