java web 监控cpu、内存等。hyperic-sigar

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jdkin、jdkjrein、jrein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-1.6.4indingsjavaexamples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 + "]";
    }
    
}

 js:

var runtime = function(data) {
    $("#mem").html(data.obj.mem + '%');

    var cpus = data.obj.cpus;
    var html = "<p>";
    for (var i = 1; i < cpus.length + 1; i++) {
        html += "<b>" + cpus[i-1].cpuName + "：</b>" +
                "<span class='runtime' id='span-cpu'>"+ cpus[i-1].cpuCombined + "</span>";
        if (i % 2 == 0) {
            html += "</p><p>";
        }
    }
    $("#cpu").html(html);
};

效果：

这里面用了websocket，没提出来具体的代码。

下次我写一个基于netty、websocket.io、springmvc、mybatis、h2database、httpclient、fastjson、https的整合，我现在就在写这样一个项目，等写好了做一个简化版的发上来。