You can and should not disable the browser back button or history. That’s bad for user experience. There are JavaScript hacks, but they are not reliable and will also not work when the client has JS disabled. Your concrete problem is that the requested page is been loaded from the browser cache instead of straight … Read more
All relative URLs in the HTML page generated by the JSP file are relative to the current request URL (the URL as you see in the browser address bar) and not to the location of the JSP file in the server side as you seem to expect. It’s namely the webbrowser who has to download … Read more
A bit decent web application consists of a mix of design patterns. I’ll mention only the most important ones. Model View Controller pattern The core (architectural) design pattern you’d like to use is the Model-View-Controller pattern. The Controller is to be represented by a Servlet which (in)directly creates/uses a specific Model and View based on … Read more
Let’s see in steps what should happen: JSP is basically a view technology which is supposed to generate HTML output. To display an image in HTML, you need the HTML <img> element. To let it locate an image, you need to specify its src attribute. The src attribute needs to point to a valid http:// … Read more
It’s your choice. There are basically three ways in a Java web application archive (WAR): 1. Put it in classpath So that you can load it by ClassLoader#getResourceAsStream() with a classpath-relative path: ClassLoader classLoader = Thread.currentThread().getContextClassLoader(); InputStream input = classLoader.getResourceAsStream(“foo.properties”); // … Properties properties = new Properties(); properties.load(input); Here foo.properties is supposed to be placed … Read more
In a well designed MVC approach, the JSP file should not contain any line of Java code and the servlet class should not contain any line of JDBC code. Assuming that you want to show a list of products in a webshop, the following code needs to be created. A Product class representing a real … Read more
Store it anywhere in an accessible location except of the IDE’s project folder aka the server’s deploy folder, for reasons mentioned in the answer to Uploaded image only available after refreshing the page: Changes in the IDE’s project folder does not immediately get reflected in the server’s work folder. There’s kind of a background job … Read more
Ensure you’ve the right Eclipse and Server version Ensure that you’re using at least Eclipse IDE for Enterprise Java developers (with the Enterprise). It contains development tools to create dynamic web projects and easily integrate servletcontainers (those tools are part of Web Tools Platform, WTP). In case you already had Eclipse IDE for Java (without … Read more
Your standard Spring MVC application will serve all requests through a DispatcherServlet that you’ve registered with your Servlet container. The DispatcherServlet looks at its ApplicationContext and, if available, the ApplicationContext registered with a ContextLoaderListener for special beans it needs to setup its request serving logic. These beans are described in the documentation. Arguably the most … Read more
ServletContext When the servlet container (like Apache Tomcat) starts up, it will deploy and load all its web applications. When a web application is loaded, the servlet container creates the ServletContext once and keeps it in the server’s memory. The web app’s web.xml and all of included web-fragment.xml files is parsed, and each <servlet>, <filter> … Read more