java web 监控cpu、内存等。hyperic-sigar

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用到一个插件hyperic-sigar

1：下载hyperic-sigar后解压，把sigar-amd64-winnt.dll(64位机器，32位用sigar-x86-winnt.dll)放到你本机的jdk\bin、jdk\jre\bin、jre\bin目录下。

2：maven引入hyperic-sigar依赖，这样就可以用了。

<dependency>
<groupId>org.fusesource</groupId>
<artifactId>sigar</artifactId>
<version>1.6.4</version>
</dependency>

3：hyperic-sigar解压后到hyperic-sigar-1.6.4\bindings\java\examples目录下这里面有很多官方提供的例子，可以直接复制到你的工程下运行测试。

我用的是websocket+java-timer做的。

public class KeepRunTime extends TimerTask { private static Sigar sigar = new Sigar(); @Override
public void run() {
RunTime rt = new RunTime();
rt.setMem(mem());
rt.setCpus(cpu()); DataPushService.pushData(JSONObject.toJSONString(new WebMessage(rt, WebMessage.RUNTIME)));
} // CPU使用率
public static TreeSet<Cpu> cpu() {
try {
TreeSet<Cpu> cpus = new TreeSet<Cpu>();
CpuPerc[] list = sigar.getCpuPercList();
for (int i=1; i<list.length+1; i++) {
Cpu cpu = new Cpu();
cpu.setNo(i);
cpu.setCpuName("CPU-"+i);
cpu.setCpuCombined(CpuPerc.format(list[i-1].getCombined()));
cpus.add(cpu);
}
return cpus;
} catch (SigarException e) {
System.err.println("获取CPU使用率异常");
e.printStackTrace();
return null;
}
} // MEM使用率
public static String mem() {
try {
Mem mem = sigar.getMem();
// 内存总量
Long memTotal = mem.getTotal() / 1024L;
// 当前内存使用量
Long memUsed = mem.getUsed() / 1024L;
// 使用率
Double usePercent = ((memUsed*1.0)/memTotal)*100;
// 四舍五入
return String.format("%.2f", usePercent);
} catch (SigarException e) {
System.err.println("获取MEM使用率异常");
e.printStackTrace();
return null;
}
} }

public class RunTime { // 内存使用率
private String mem;
// CPU使用率
private TreeSet<Cpu> cpus; public String getMem() {
return mem;
}
public void setMem(String mem) {
this.mem = mem;
}
public TreeSet<Cpu> getCpus() {
return cpus;
}
public void setCpus(TreeSet<Cpu> cpus) {
this.cpus = cpus;
} @Override
public String toString() {
return "RunTime [mem=" + mem + ", cpus=" + cpus + "]";
} }

public class Cpu implements Comparable<Cpu>{ private int no; private String cpuName; private String cpuCombined; public int getNo() {
return no;
} public void setNo(int no) {
this.no = no;
} public String getCpuName() {
return cpuName;
} public void setCpuName(String cpuName) {
this.cpuName = cpuName;
} public String getCpuCombined() {
return cpuCombined;
} public void setCpuCombined(String cpuCombined) {
this.cpuCombined = cpuCombined;
} // 正序
@Override
public int compareTo(Cpu o) {
return (this.no - o.no);
} @Override
public String toString() {
return "Cpu [no=" + no + ", cpuName=" + cpuName + ", cpuCombined="
+ cpuCombined + "]";
} }