有时需要在当前代码中获取当前Server实例的端口号, 通过HttpServletRequest请求可以, 但有时也需要在没有请求的情况下获取到端口号.

用以下方法是可以获取到的:

public int getHttpPort() {try {MBeanServer server;if (MBeanServerFactory.findMBeanServer(null).size() > 0) {server = MBeanServerFactory.findMBeanServer(null).get(0);} else {log.error("no MBeanServer!");return -1;}Set names = server.queryNames(new ObjectName("Catalina:type=Connector,*"),Query.match(Query.attr("protocol"), Query.value("HTTP/1.1")));Iterator iterator = names.iterator();if (iterator.hasNext()) {ObjectName name = (ObjectName) iterator.next();return Integer.parseInt(server.getAttribute(name, "port").toString());}} catch (Exception e) {log.error("getHttpPort", e);}return -1;
}