CODEWITHSUNDEEP
jsp
Ordo
Ordo

Reputation: 705

Using String.toLowerCase() without getting a resolve error, JSP

I have a final question on my piece of code. As a last thing i want to build in a function which will ignore the case sensitivity. So "user" and "USER" and "UsEr" should be treated the same way. I have a first idea how to implement such a function. Thats what i tried out: 

        <% if (name != null) { namecheck = name.toLowerCase(); } 
           else { namecheck = request.getParameter("name"); }
        %>

        <% if (password != null) { passwordcheck = password.toLowerCase(); } 
           else { passwordcheck = request.getParameter("password"); }
        %>



Since i must check if it's NULL to avoid an error, it is not so easy to implement. Now i could found out that my "namecheck" and "passwordcheck" are only avaible in the curled if-brackets. So the compiler gives me a "not resolved" error. I don't know how to fix this problem without writing a huge number of if-else. 

        <?xml version="1.0" encoding="iso-8859-1"?>
        <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN"
                  "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
        <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="de">

        <head>
          <title>Practice</title>
        </head>

        <body>

        <h2>Practice</h2>
        <h3>Please enter your name and the password.</h3>
        <form method="post" action="">
        <table>

        <tr><td style="text-align:center">Name</td>
        <td>
        <input type="text" name="name" value="${fn:escapeXml(param.name)}" /></td>
        </tr>
        <tr><td style="text-align:center">Password</td>
        <td><input type="password" name="password" value="${fn:escapeXml(param.password)}" /></td>

        </tr>
        <tr><td><input type="submit" value="Send" /></td>
        </tr>
        </table>
        </form>

        <%-- Testing name and password. --%>
        <% String name = request.getParameter("name");
           String password = request.getParameter("password");
        %>  

        <%-- Trying to use the .toLowerCase(). --%>

        <% if (name != null) { namecheck = name.toLowerCase(); } 
           else { namecheck = request.getParameter("name"); }
        %>

        <% if (password != null) { passwordcheck = password.toLowerCase(); } 
           else { passwordcheck = request.getParameter("password"); }
        %>    


        <% if (namecheck != null && name.equals("user") && passwordcheck != null && password.equals("1234")) 
             {
        %>
               <p>Your Input is correct!</p>
        <%   }

           else
             {
        %>
               <p>Your input is not correct!</p>
        <%   }
        %>

        </body>


        </html>

Upvotes: 1

Views: 3334

Answers (4)

BalusC
BalusC

Reputation: 1109222

Just use String#equalsIgnoreCase().

String name = request.getParameter("name");
String password = request.getParameter("password");
if (name != null && name.equalsIgnoreCase("user")
    && password != null && password.equalsIgnoreCase("1234")) 
{
    // Pass.
}

I keep repeating: JSP is the wrong place for this stuff. I hope it's "just" homework.

Upvotes: 2

brabster
brabster

Reputation: 43580

You have to declare variables you're using.

Try declaring namecheck and passwordcheck, for example:

 <% String name = request.getParameter("name");
   String password = request.getParameter("password");
   String namecheck = "";
   String passwordcheck = "";
 %>

Upvotes: 1

Mark Baijens
Mark Baijens

Reputation: 13222

You can change your code using jstl core tag libary.

API

Upvotes: 0

josh.trow
josh.trow

Reputation: 4901

Maybe I'm not seeing something else, but I don't see that you ever declared namecheck and passwordCheck as Strings. If you want to keep them available just declare them next to where you 'get' name and pas

Upvotes: 1

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