Servlet程序能够调用JavaBean、JDBC、其它Servlet、RMI、EJB、SOAP和JNI等程序完成指定的功能，计算结果以HTML/XML等形式返回给客户端-Servlet program can call the JavaBean, JDBC, other Servlet, RMI, EJB, SOAP, and JNI and other procedures to complete the assigned function, the results to HTML/XML