java获取服务器jvm负载信息 内存占用信息

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使用java库自带的OperatingSystemMXBean类获取服务器负载相关信息  这个类java文档中并没有详细说明  这里提供一个工具类

package com.bootdo.common.utils;

import com.sun.management.OperatingSystemMXBean;
import java.lang.management.ManagementFactory;

public class getSystemInfo {

    /**
     * 获取操作系统名称
     * @return
     */
    public static String getOsName(){
        // 操作系统
        String osName = System.getProperty("os.name");
        return osName;
    }

    /**
     * 获取系统cpu负载
     * @return
     */
    public static double getSystemCpuLoad(){
        OperatingSystemMXBean osmxb = (OperatingSystemMXBean) ManagementFactory
                .getOperatingSystemMXBean();
        double SystemCpuLoad = osmxb.getSystemCpuLoad();
        return SystemCpuLoad;
    }

    /**
     * 获取jvm线程负载
     * @return
     */
    public static double getProcessCpuLoad(){
        OperatingSystemMXBean osmxb = (OperatingSystemMXBean) ManagementFactory
                .getOperatingSystemMXBean();
        double ProcessCpuLoad = osmxb.getProcessCpuLoad();
        return ProcessCpuLoad;
    }

    /**
     * 获取总的物理内存
     * @return
     */
    public static long getTotalMemorySize(){
        int kb = 1024;
        OperatingSystemMXBean osmxb = (OperatingSystemMXBean) ManagementFactory
                .getOperatingSystemMXBean();
        // 总的物理内存
        long totalMemorySize = osmxb.getTotalPhysicalMemorySize() / kb;
        return totalMemorySize;
    }

    /**
     * 获取剩余的物理内存
     * @return
     */
    public static long getFreePhysicalMemorySize(){
        int kb = 1024;
        OperatingSystemMXBean osmxb = (OperatingSystemMXBean) ManagementFactory
                .getOperatingSystemMXBean();
        // 剩余的物理内存
        long freePhysicalMemorySize = osmxb.getFreePhysicalMemorySize() / kb;
        return freePhysicalMemorySize;
    }

    /**
     * 获取已使用的物理内存
     * @return
     */
    public static long getUsedMemory(){
        int kb = 1024;
        OperatingSystemMXBean osmxb = (OperatingSystemMXBean) ManagementFactory
                .getOperatingSystemMXBean();
        //已使用的物理内存
        long usedMemory = (osmxb.getTotalPhysicalMemorySize() - osmxb.getFreePhysicalMemorySize()) / kb;
        return usedMemory;
    }
}