jsp Archives - Page 2 of 3

Design Patterns web based applications [closed]

Closed. This question is opinion-based. It is not currently accepting answers. Want to improve this question? Update the question so it can be ...

May 11, 2022
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Evaluate empty or null JSTL c tags

How can I validate if a String is null or empty using the c tags of JSTL? I have a variable of name ...

May 7, 2022
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How to solve the “failed to lazily initialize a collection of role” Hibernate exception

I have this problem: org.hibernate.LazyInitializationException: failed to lazily initialize a collection of role: mvc3.model.Topic.comments, no session or session was closed Here is the ...

May 6, 2022
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The superclass “javax.servlet.http.HttpServlet” was not found on the Java Build Path [duplicate]

This question already has answers here: How do I import the javax.servlet / jakarta.servlet API in my Eclipse project? (15 answers) Closed 5 ...

May 6, 2022
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Download a file by jQuery.Ajax

I have a Struts2 action in the server side for file downloading. <action name="download" class="com.xxx.DownAction"> <result name="success" type="stream"> <param name="contentType">text/plain</param> <param name="inputName">imageStream</param> <param ...

May 4, 2022
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How can I upload files to a server using JSP/Servlet?

How can I upload files to server using JSP/Servlet? I tried this: <form action="upload" method="post"> <input type="text" name="description" /> <input type="file" name="file" /> ...

April 27, 2022
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What is the difference between JSF, Servlet and JSP?

I have some questions. These are : How are JSP and Servlet related to each other? Is JSP some kind of Servlet? How ...

April 19, 2022
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How can I avoid Java code in JSP files, using JSP 2?

I’m new to Java EE and I know that something like the following three lines <%= x+1 %> <%= request.getParameter("name") %> <%! counter++; ...

April 11, 2022
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Spring Boot – Unable to resolve Whitelabel Error Page

Please define method in your controller: You may define @RequestMapping(value = "/", method = RequestMethod.GET) or you may directly use @GetMapping @Controller public class LoginController ...

April 8, 2022
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getting error HTTP Status 405 – HTTP method GET is not supported by this URL but not used `get` ever?

The problem is that you mapped your servlet to /register.html and it expects POST method, because you implemented only doPost() method. So when ...

April 8, 2022
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