java怎样获取CPU占用率和硬盘占用率

通过jmx可以监控vm内存使用,系统内存使用等，以下是网上某博客代码，特点是通过window和linux命令获得CPU使用率。 

 利用java程序实现获取计算机cpu利用率和内存使用信息。 

package com.amgkaka.performance;   

   

/** *//**  

 * 监视信息的JavaBean类.  

 * @author  amg  

 * @version 1.0   

 * Creation date: 2008-4-25 - 上午10:37:00  

 */  

public class MonitorInfoBean {   

    /** *//** 可使用内存. */  

    private long totalMemory;   

        

    /** *//** 剩余内存. */  

    private long freeMemory;   

        

    /** *//** 最大可使用内存. */  

    private long maxMemory;   

        

    /** *//** <a href="https://www.baidu.com/s?wd=%E6%93%8D%E4%BD%9C%E7%B3%BB%E7%BB%9F&tn=44039180_cpr&fenlei=mv6quAkxTZn0IZRqIHckPjm4nH00T1YYmhN-mHIWuWPhrHDYnyR40ZwV5Hcvrjm3rH6sPfKWUMw85HfYnjn4nH6sgvPsT6KdThsqpZwYTjCEQLGCpyw9Uz4Bmy-bIi4WUvYETgN-TLwGUv3EPHczPWTsPjn1rHDkPWTsrjfd" target="_blank" class="baidu-highlight">操作系统</a>. */  

    private String osName;   

        

    /** *//** 总的<a href="https://www.baidu.com/s?wd=%E7%89%A9%E7%90%86%E5%86%85%E5%AD%98&tn=44039180_cpr&fenlei=mv6quAkxTZn0IZRqIHckPjm4nH00T1YYmhN-mHIWuWPhrHDYnyR40ZwV5Hcvrjm3rH6sPfKWUMw85HfYnjn4nH6sgvPsT6KdThsqpZwYTjCEQLGCpyw9Uz4Bmy-bIi4WUvYETgN-TLwGUv3EPHczPWTsPjn1rHDkPWTsrjfd" target="_blank" class="baidu-highlight">物理内存</a>. */  

    private long totalMemorySize;   

        

    /** *//** 剩余的<a href="https://www.baidu.com/s?wd=%E7%89%A9%E7%90%86%E5%86%85%E5%AD%98&tn=44039180_cpr&fenlei=mv6quAkxTZn0IZRqIHckPjm4nH00T1YYmhN-mHIWuWPhrHDYnyR40ZwV5Hcvrjm3rH6sPfKWUMw85HfYnjn4nH6sgvPsT6KdThsqpZwYTjCEQLGCpyw9Uz4Bmy-bIi4WUvYETgN-TLwGUv3EPHczPWTsPjn1rHDkPWTsrjfd" target="_blank" class="baidu-highlight">物理内存</a>. */  

    private long freePhysicalMemorySize;   

        

    /** *//** 已使用的<a href="https://www.baidu.com/s?wd=%E7%89%A9%E7%90%86%E5%86%85%E5%AD%98&tn=44039180_cpr&fenlei=mv6quAkxTZn0IZRqIHckPjm4nH00T1YYmhN-mHIWuWPhrHDYnyR40ZwV5Hcvrjm3rH6sPfKWUMw85HfYnjn4nH6sgvPsT6KdThsqpZwYTjCEQLGCpyw9Uz4Bmy-bIi4WUvYETgN-TLwGUv3EPHczPWTsPjn1rHDkPWTsrjfd" target="_blank" class="baidu-highlight">物理内存</a>. */  

    private long usedMemory;   

        

    /** *//** 线程总数. */  

    private int totalThread;   

        

    /** *//** <a href="https://www.baidu.com/s?wd=cpu%E4%BD%BF%E7%94%A8%E7%8E%87&tn=44039180_cpr&fenlei=mv6quAkxTZn0IZRqIHckPjm4nH00T1YYmhN-mHIWuWPhrHDYnyR40ZwV5Hcvrjm3rH6sPfKWUMw85HfYnjn4nH6sgvPsT6KdThsqpZwYTjCEQLGCpyw9Uz4Bmy-bIi4WUvYETgN-TLwGUv3EPHczPWTsPjn1rHDkPWTsrjfd" target="_blank" class="baidu-highlight">cpu使用率</a>. */  

    private double cpuRatio;   

   

    public long getFreeMemory() {   

        return freeMemory;   

    }   

   

    public void setFreeMemory(long freeMemory) {   

        this.freeMemory = freeMemory;   

    }   

   

    public long getFreePhysicalMemorySize() {   

        return freePhysicalMemorySize;   

    }   

   

    public void setFreePhysicalMemorySize(long freePhysicalMemorySize) {   

        this.freePhysicalMemorySize = freePhysicalMemorySize;   

    }   

   

    public long getMaxMemory() {   

        return maxMemory;   

    }   

   

    public void setMaxMemory(long maxMemory) {   

        this.maxMemory = maxMemory;   

    }   

   

    public String getOsName() {   

        return osName;   

    }   

   

    public void setOsName(String osName) {   

        this.osName = osName;   

    }   

   

    public long getTotalMemory() {   

        return totalMemory;   

    }   

   

    public void setTotalMemory(long totalMemory) {   

        this.totalMemory = totalMemory;   

    }   

   

    public long getTotalMemorySize() {   

        return totalMemorySize;   

    }   

   

    public void setTotalMemorySize(long totalMemorySize) {   

        this.totalMemorySize = totalMemorySize;   

    }   

   

    public int getTotalThread() {   

        return totalThread;   

    }   

   

    public void setTotalThread(int totalThread) {   

        this.totalThread = totalThread;   

    }   

   

    public long getUsedMemory() {   

        return usedMemory;   

    }   

   

    public void setUsedMemory(long usedMemory) {   

        this.usedMemory = usedMemory;   

    }   

   

    public double getCpuRatio() {   

        return cpuRatio;   

    }   

   

    public void setCpuRatio(double cpuRatio) {   

        this.cpuRatio = cpuRatio;   

    }   

}