The request body is available as byte stream by HttpServletRequest#getInputStream(): InputStream body = request.getInputStream(); // … Or as character stream by HttpServletRequest#getReader(): Reader body = request.getReader(); // … Note that you can read it only once. The client ain’t going to resend the same request multiple times. Calling getParameter() and so on will implicitly also … Read more
It might because the version of maven-war-plugin is too old in your project. Try to add below code in your pom.xml <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-war-plugin</artifactId> <version>3.3.1</version> </plugin>
The ServletConfig parameters are specified for a particular servlet and are unknown to other servlets. It is used for intializing purposes. The ServletContext parameters are specified for an entire application outside of any particular servlet and are available to all the servlets within that application. It is application scoped and thus globally accessible across the … Read more
You need to create a Filter wherein you wrap the ServletResponse argument with a custom HttpServletResponseWrapper implementation wherein you override the getOutputStream() and getWriter() to return a custom ServletOutputStream implementation wherein you copy the written byte(s) in the base abstract OutputStream#write(int b) method. Then, you pass the wrapped custom HttpServletResponseWrapper to the FilterChain#doFilter() call instead … Read more
Map the controller servlet on a more specific url-pattern like /pages/*, put the static content in a specific folder like /static and create a Filter listening on /* which transparently continues the chain for any static content and dispatches requests to the controller servlet for other content. In a nutshell: <filter> <filter-name>filter</filter-name> <filter-class>com.example.Filter</filter-class> </filter> <filter-mapping> … Read more
You indeed don’t need to do so. Thumb rule: if you didn’t create/open it yourself using new SomeOutputStream(), then you don’t need to close it yourself. If it was for example a new FileOutputStream(“c:/foo.txt”), then you obviously need to close it yourself. Reasons that some people still do it are just to ensure that nothing … Read more
As far as I know, “INF” stands for “Information”, as you said. It probably was named WEB-INF for similarity with the META-INF directory in JAR files. Sometimes the meaning of a directory changes so much over time that it no longer makes sense. For example, bin directories in Unix/Linux often contain non-binary “executable” files, such … 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
Your best bet is User-Agent header. You can get it like this in JSP or Servlet, String userAgent = request.getHeader(“User-Agent”); The header looks like this, User-Agent: Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.5; en-US; rv:1.9.0.13) Gecko/2009073021 Firefox/3.0.13 It provides detailed information on browser. However, it’s pretty much free format so it’s very hard to … Read more
You need to install a plugin, There is a free one from the eclipse foundation called the Web Tools Platform. It has all the development functionality that you’ll need. You can get the Java EE Edition of eclipse with has it pre-installed. To create and run your first servlet: New… Project… Dynamic Web Project. Right … Read more