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;
}
}