Passing the data between the site through URL

[tyte kyat]

<%! String myid="hello"; 
String name="yougotit"; %>


 <a href="idtest_2.jsp?ida="+myid> ID test go </a> <br>           [color=red] ---(5)[/color]
<%out.println("<a href=\"idtest_2.jsp?ex="+name+"\">Click to Pass</a>");%>            [color=red] --(6)[/color]

can someone please explain me the difference between the above two lines?

As far as I understand, line no 5 does not use script-let, so it does not need to use "out.println" and so (" .... ");
So, the remaining, <a herf="idtest_2.jsp?ida="+variable> is fine . I THINK.

But, it is showing "null". When I try to get the value by using -->request.getParameter("ida");

so, please someone point out my mistake or misunderstanding.

Line no 6 is working fine it is passing the variable. But not line no 5.
Thanks.

[Bear Bibeault]

In 2011 there should no longer be any Java code in a JSP. JSP 2 was introduced almost 10 years ago and the JSTL and EL should be used in place of Java code.

Using out.println() in a Java script let is an especially horrible practice. The whole point of a JSP is to serve as an HTML template. Building HTML inside a Java string, inside a scriptlet, inside a JSP is simply awful -- even for JSP 1 code.

What is it you're really trying to accomplish?

[tyte kyat]

Thanks for the quick reply...

I want to pass a variable to another JSP page, which is linked using <a href=" "> </a> anchor tag.

[Bear Bibeault]

Right, you'd do that using an <a> tag and passing the value as a request parameter.

So let's say that you had the value to pass in a scoped variable named xyz and you wanted to pass it using the name abc, you do that with:

<a href="/some/url?abc=${xyz}">Click me!</a>

[Mary Chellapa]

Ans and Q :

Cant we use redirect instead of <a>
or hidden parameter(then url wont be used) ... if you have to pass a value to next jsp?

[Bear Bibeault]

Mary Chellapa wrote:Cant we use redirect instead of <a>

No, a redirect happens immediately. An anchor tag needs to be clicked upon.

or hidden parameter(then url wont be used)

The OP specifically asked about a link. But sure, a hidden (or even non-hidden) parameter can be used for a form submission. And whether the URL is "used" or not depends upon the HTTP method used.

[Mary Chellapa]

Bear Bibeault wrote:No, a redirect happens immediately. An anchor tag needs to be clicked upon.

Bear,

any other way ( than <a> ) can it be done.

[Bear Bibeault]

That greatly depends on what exactly "it" is.