通過jmx可以監控vm內存使用,系統內存使用等，以下是網上某博客代碼，特點是通過window和linux命令獲得CPU使用率。
利用java程序實現獲取計算機cpu利用率和內存使用信息。
package com.amgkaka.performance;
/** */
/**
* 監視信息的JavaBean類.
* @author amg
* @version 1.0
* Creation date: 2008-4-25 - 上午10:37:00
*/
public
class
MonitorInfoBean {
/** */
/** 可使用內存. */
private
long
totalMemory;
/** */
/** 剩余內存. */
private
long
freeMemory;
/** */
/** 最大可使用內存. */
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">操作系統</a>. */
private
String osName;
/** */
/** 總的<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">物理內存</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">物理內存</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">物理內存</a>. */
private
long
usedMemory;
/** */
/** 線程總數. */
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;
}
}