/** * 获取当前线程id */private Long getThreadId() {    try {        return Thread.currentThread().getId();    } catch (Exception e) {        return null;    }}/** * 获取当前进程id */private Long getProcessId() {    try {        RuntimeMXBean runtime = ManagementFactory.getRuntimeMXBean();        String name = runtime.getName();        String pid = name.substring(0, name.indexOf('@' ));        return Long.parseLong(pid);    } catch (Exception e) {        return null;    }}/** * 获取当前服务器ip地址 */private String getServerIp() {    try {        //用 getLocalHost() 方法创建的InetAddress的对象        InetAddress address = InetAddress.getLocalHost();        return address.getHostAddress();    } catch (Exception e) {        return null;    }}