Methods and systems for extending functions of a JAVA application. The JAVA application may call a browser to obtain the global configuration file that is indicated by a URL and load configuration information of extensions of the JAVA application based on the global configuration file. In response to a user request received by the JAVA application, the JAVA application calls a browser and processes the user request based on the loaded configuration information of extensions of the JAVA application. In implementations, the JAVA application may transmit the user request to a server. After receiving a response to the user request from the server, the JAVA application may process the response to the user request based on the loaded configuration information of extensions of the JAVA application. The implementations may respond to the user request that is beyond the preset functions of the JAVA application.