In Java standalone application, you can use -D option to pass in the system properties : $ java -Dgeoip.file="/home/mkyong/geoip/test.db" test.jar In Java web application, you can pass the system properties via context-param in web.xml : web.xml <web-app> <context-param> <param-name>geoip.file</param-name> <param-value>/home/mkyong/geoip/test.db</param-value> </context-param> </web-app>
The web.xml is a configuration file to describe how a web application should be deployed. Here’re 5 web.xml examples, just for self-reference. 1. Servlet 3.1 deployment descriptor Java EE 7 XML schema, namespace is http://xmlns.jcp.org/xml/ns/javaee/ web.xml <web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" version="3.1"> </web-app> 2. Servlet 3.0 deployment descriptor Java EE 6 XML schema, namespace is […]
In general, the “DOCTYPE” tag is tells your web browser how to validate or process your web page according to the w3c rules and avoid some web browsers (especially IE) to turn itself into “Quirks mode“. Quirks mode is disaster Let go thought an example to know how quirks mode mess up your web page. […]
My website’s images are kept directly link (hotlinking) by other websites, it’s a thief behavior and eating my bandwidth, why don’t they copy to their own server and display it? I decided to take action to stop this happened again, this so called “hotlinking” can be stopped by “.htaccess” access control. Case Study 1. Hotlinking […]
Often times, Eclipse IDE may need access to the Internet for some plugins install and update. If your computer is behind a proxy server, most company do, Eclipse will keep hanging and take very long time to process and failed at the end. You have to configure the proxy settings in Eclipse in order to […]
Latest Eclipse IDE is required to support the hibernate tools plug-in. However my “svn+ssh” is not working correctly after updated to the latest Eclipse IDE and Subeclipse version of 1.6.x. While i initial the “svn+ssh” access connection in Eclipse IDE, i had encountered the following error message. Network connection closed unexpectedly svn: Connection closed unexpectedly […]
The following code is a JQuery javascript which will refresh the captcha image automatically wherever user clicked on it. The code is working fine in FireFox. However, when i test it in Internet explorer 6 or 7, i hit the following Active X controls warning. Your security settings do not allow Web sites to use […]
The “context-param” tag is define in “web.xml” file and it provides parameters to the entire web application. For example, store administrator’s email address in “context-param” parameter to send errors notification from our web application. web.xml <context-param> <param-name>AdministratorEmail</param-name> <param-value>[email protected]</param-value> </context-param> We can get the above “AdministratorEmail” context-param value with the following java code. String email= getServletContext().getInitParameter("AdministratorEmail"); […]
