Variables

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July 5th, 2002, 03:57 PM

socrates73

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Variables

Hello, I am just curious if a variable is not defined in the JSP page, but is passed through the URL if can be accessed in the page? For exampe:

URL

<sample.jsp>
<HTML>
<%
if (variable == "test") {
out.println("Variable = test\n");
}
%>
</HTML>

July 5th, 2002, 11:20 PM

jnicholas

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A variable doesn't appear automatically like it does in php. You can grab a query string variable like this:

<% String myvariable = request.getParameter("variable"); %>

Also you can't test for string equality the way you did. if(variable == "test") would test if variable and "test" were the actual same object not just the same characters. you need if(variable.equals("test")) .

outprintln() also includes a line return already so you don't need the \n

July 6th, 2002, 01:48 PM

socrates73

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Quote:

Originally posted by jnicholas
A variable doesn't appear automatically like it does in php. You can grab a query string variable like this:

<% String myvariable = request.getParameter("variable"); %>

Also you can't test for string equality the way you did. if(variable == "test") would test if variable and "test" were the actual same object not just the same characters. you need if(variable.equals("test")) .

outprintln() also includes a line return already so you don't need the \n

ok thanks for the help, i appreciate it... but i have another question, does jsp allow you to encrypt objects in the query string... for example in coldfusion i could encrypt the value of variable with something like this :
<CFSET variable2 = Encrypt(key, variable)>

this just adds a little more peace of mind when dealing with user information.

July 7th, 2002, 04:09 AM

pabloj

Modding: Oracle MsSQL Firebird

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Take a look at http://www.jguru.com/faq/view.jsp?EID=446031 it might help

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