fix code

hutool-core/src/main/java/cn/hutool/core/net/NetUtil.java

@@ -461,7 +461,8 @@ public class NetUtil {
 	 * 如果获取失败调用 {@link InetAddress#getLocalHost()}方法获取。<br>
 	 * 此方法不会抛出异常，获取失败将返回{@code null}<br>
 	 * <p>
-	 * 参考：http://stackoverflow.com/questions/9481865/getting-the-ip-address-of-the-current-machine-using-java
+	 * 参考：<a href="http://stackoverflow.com/questions/9481865/getting-the-ip-address-of-the-current-machine-using-java">
+	 *     http://stackoverflow.com/questions/9481865/getting-the-ip-address-of-the-current-machine-using-java</a>
 	 *
 	 * @return 本机网卡IP地址，获取失败返回{@code null}
 	 * @since 3.0.7
@@ -484,7 +485,7 @@ public class NetUtil {
 	 * <p>
 	 * 此方法不会抛出异常，获取失败将返回{@code null}<br>
 	 * <p>
-	 * 见：https://github.com/dromara/hutool/issues/428
+	 * 见：<a href="https://github.com/dromara/hutool/issues/428">https://github.com/dromara/hutool/issues/428</a>
 	 *
 	 * @return 本机网卡IP地址，获取失败返回{@code null}
 	 * @since 3.0.1

hutool-extra/src/main/java/cn/hutool/extra/management/ManagementException.java

@@ -0,0 +1,37 @@
+package cn.hutool.extra.management;
+
+import cn.hutool.core.exceptions.ExceptionUtil;
+import cn.hutool.core.text.StrUtil;
+
+/**
+ * FtpException异常
+ *
+ * @author xiaoleilu
+ */
+public class ManagementException extends RuntimeException {
+	private static final long serialVersionUID = 1L;
+
+	public ManagementException(final Throwable e) {
+		super(ExceptionUtil.getMessage(e), e);
+	}
+
+	public ManagementException(final String message) {
+		super(message);
+	}
+
+	public ManagementException(final String messageTemplate, final Object... params) {
+		super(StrUtil.format(messageTemplate, params));
+	}
+
+	public ManagementException(final String message, final Throwable throwable) {
+		super(message, throwable);
+	}
+
+	public ManagementException(final String message, final Throwable throwable, final boolean enableSuppression, final boolean writableStackTrace) {
+		super(message, throwable, enableSuppression, writableStackTrace);
+	}
+
+	public ManagementException(final Throwable throwable, final String messageTemplate, final Object... params) {
+		super(StrUtil.format(messageTemplate, params), throwable);
+	}
+}

hutool-extra/src/main/java/cn/hutool/extra/management/ManagementUtil.java

@@ -4,6 +4,8 @@ import cn.hutool.core.convert.Convert;
 import cn.hutool.core.lang.Singleton;
 import cn.hutool.core.text.StrUtil;
 
+import javax.management.MBeanServer;
+import javax.management.ObjectName;
 import java.io.PrintWriter;
 import java.lang.management.ClassLoadingMXBean;
 import java.lang.management.CompilationMXBean;
@@ -18,8 +20,11 @@ import java.lang.management.ThreadMXBean;
 import java.util.List;
 
 /**
- * Java的System类封装工具类。<br>
- * 参考：<a href="http://blog.csdn.net/zhongweijian/article/details/7619383">http://blog.csdn.net/zhongweijian/article/details/7619383</a>
+ * Java的JMX（Java Management Extensions）相关封装工具类。<br>
+ * JMX就是Java管理扩展，用来管理和监测 Java 程序。最常用到的就是对于 JVM 的监测和管理，比如 JVM 内存、CPU 使用率、线程数、垃圾收集情况等等。<br>
+ * 参考：
+ * <a href="http://blog.csdn.net/zhongweijian/article/details/7619383">http://blog.csdn.net/zhongweijian/article/details/7619383</a><br>
+ * <a href="https://zhuanlan.zhihu.com/p/166530442">https://zhuanlan.zhihu.com/p/166530442</a>
  *
  * @author Looly
  */
@@ -246,6 +251,32 @@ public class ManagementUtil {
 		return ManagementFactory.getGarbageCollectorMXBeans();
 	}
 
+	/**
+	 * 获取{@link MBeanServer}<br>
+	 * MBeanServer是负责管理MBean的，一般一个JVM只有一个MBeanServer，所有的MBean都要注册到MBeanServer上，并通过 MBeanServer 对外提供服务。
+	 *
+	 * @return {@link MBeanServer}
+	 * @since 6.0.0
+	 */
+	public static MBeanServer getMBeanServer() {
+		return ManagementFactory.getPlatformMBeanServer();
+	}
+
+	/**
+	 * 注册MBean
+	 *
+	 * @param mBean Mbean对象
+	 * @param name  MBean 的唯一标示
+	 * @since 6.0.0
+	 */
+	public static void registerMBean(final Object mBean, final ObjectName name) {
+		try {
+			getMBeanServer().registerMBean(mBean, name);
+		} catch (final Exception e) {
+			throw new ManagementException(e);
+		}
+	}
+
 	/**
 	 * 取得Java Virtual Machine Specification的信息。
 	 *