As JSON objects do not inherently have an order, you should use an array within your JSON object to ensure order. As an example (based on your code): jsonObj = { items: [ { name: “Stack”, time: “…” }, { name: “Overflow”, time: “…” }, { name: “Rocks”, time: “…” }, … ] }; This … Read more
You can use * as prefix or suffix wildcard. In your case, you can use /myServlet/* for a folder mapping. @WebServlet(“/myServlet/*”) The path info (the part after the mapping in the URL) is in the servlet by the way available as: String pathInfo = request.getPathInfo(); This would in case of myapp/myServlet/other return /other. See also: … Read more
The most common and recommended scenario (for the server side validation in Java serlvets/JSP world) is setting some error message as a request attribute (in the request scope) and then outputting this message in a JSP using Expression Language (see the example below). When the error message is not set – nothing will be shown. … Read more
To the point: just get an InputStream of it somehow (FileInputStream is suitable) and write it to the OutputStream of the response the usual Java IO way. That’s basically all. You’ll only need to take care that you set the right response headers, so that the browser understands what to do with it. The Content-Type … Read more
Have a look at Jetty. It can be invoked from a standard Main invocation, and handles servlet containers pretty well (GWT debugging is hosted in a Jetty environment, for example). I’ve used this for debugging Lift applications, and been pretty impressed. To forward requests through IIS to Jetty you can try mod_jk. The problem is … Read more
Try: <dependency> <groupId>com.google.code.gson</groupId> <artifactId>gson</artifactId> <version>2.1</version> <scope>provided</scope> </dependency> I have edited my comment and added the scope. The default scope is compile, meaning that the dependency is not present at runtime. For this, you use the provided scope. More about scopes in maven dependencies on Apache’s Introduction to Maven Dependencies. Hope this resolves your issue. P.S.: … Read more
What should I set as the content type so that it retains the file extension? Use ServletContext#getMimeType() to get the mime type based on the file name. String mimeType = getServletContext().getMimeType(filename); The servletcontainer usually already provides a default mime type mapping in its own web.xml. If you want to overridde or add some other, then … Read more
JSP/Servlet isn’t that high-level as PHP which has practically “anything built-in”. In Java you’ve more freedom to choose from libraries. There are several JSON libraries in Java available which you can implement in your webapp, the popular ones being under each JSON.org, Jackson and Google Gson. We use here Gson to our satisfaction. It has … Read more
This is not specific to Tomcat. This is specific to the Servlet API. How the error page is determined is specified in chapter 9.9.2 of Servlet API specification 2.5. Here’s an extract of relevance: SRV.9.9.2 Error Pages If no error-page declaration containing an exception-type fits using the class-hierarchy match, and the exception thrown is a … Read more