Javafx实现远程系统监控

 

实现功能：

1、监控远程机器(用到ganymed-ssh2-build210.jar包)。

2、实时显示cpu使用情况(包括系统进程使用cpu、用户进程使用cpu以及空闲进程使用cpu)。

3、实时系统内存使用情况(包括系统已使用内存以及空闲内存)。

效果图:

接口设计： 1、UpdateListener接口，用于实时更新数据

public interface UpdateListener {
   public void updateCPU(String user, String sys, String idle);
   public void updateMemory(String used, String free);
}

  参考实现： 定义FX图表变量： LineChart<Number, Number> cpuLineChart; LineChart<Number, Number> memLineChart; 定义监控数据存储变量： ObservableList<LineChart.Series<Number, Number>> cpuLineChartSeries = FXCollections .observableArrayList(); ObservableList<LineChart.Series<Number, Number>> memLineChartSeries = FXCollections .observableArrayList(); 核心代码：

    @Override
    public void updateCPU(String user, String sys, String idle) {
	cpuLineChartSeries.get(0).getData()
			.add(new LineChart.Data<Number, Number>(cpuIndex, Float
					.parseFloat(user)));
	cpuLineChartSeries.get(1).getData()
			.add(new LineChart.Data<Number, Number>(cpuIndex, Float
					.parseFloat(sys)));
	cpuLineChartSeries.get(2).getData()
			.add(new LineChart.Data<Number, Number>(cpuIndex, Float
					.parseFloat(idle)));
	NumberAxis xAxis = (NumberAxis) cpuLineChart.getXAxis();
	if (cpuIndex < xAxis.getUpperBound()) {
		cpuIndex += 1;
	} else {
			xAxis.setLowerBound(xAxis.getLowerBound() + 1);
			xAxis.setUpperBound(xAxis.getUpperBound() + 1);
			cpuLineChartSeries.get(0).getData().remove(0);
			cpuLineChartSeries.get(1).getData().remove(0);
			cpuLineChartSeries.get(2).getData().remove(0);
	}

    }

    @Override
    public void updateMemory(String used, String free) {
	memLineChartSeries.get(0).getData()
			.add(new LineChart.Data<Number, Number>(memIndex, Float
					.parseFloat(used) / 1024.0));
	memLineChartSeries.get(1).getData()
			.add(new LineChart.Data<Number, Number>(memIndex, Float
					.parseFloat(free) / 1024.0));
	NumberAxis xAxis = (NumberAxis) memLineChart.getXAxis();
	if (memIndex < xAxis.getUpperBound()) {
		memIndex += 1;
	} else {
		xAxis.setLowerBound(xAxis.getLowerBound() + 1);
		xAxis.setUpperBound(xAxis.getUpperBound() + 1);
		memLineChartSeries.get(0).getData().remove(0);
		memLineChartSeries.get(1).getData().remove(0);
	}
    }

  2、数据解析接口

public interface DataParser {
    public String[] getCPUData(String line);

    public String[] getMemoryData(String line);

    public boolean isCPULine(String line);

    public boolean isMemoryLine(String line);
}

  Linux下数据解析参考实现:

    public String[] getCPUData(String line) {
	String cpuStr = line.substring(line.indexOf("Cpu(s): ") + 8);
	int indexOfUser = cpuStr.indexOf("%us,");
	String user = cpuStr.substring(0, indexOfUser).trim();
	int indexOfSys = cpuStr.indexOf("%sy,");
	String sys = cpuStr.substring(indexOfUser + 5, indexOfSys).trim();
	int indexOfIdle = cpuStr.indexOf("%id,");
	int indexOfNi = cpuStr.indexOf("%ni,");
	String idle = cpuStr.substring(indexOfNi + 5, indexOfIdle).trim();
	return new String[] { user, sys, idle };
    }

    public String[] getMemoryData(String line) {
	String memStr = line.substring(line.indexOf("total, ") + 7);
	int indexOfUsed = memStr.indexOf("k used,");
	String used = memStr.substring(0, indexOfUsed).trim();
	double usedN = Double.parseDouble(used);
	used = "" + (usedN / 1024.0);
	int indexOfFree = memStr.indexOf("k free,");
	String free = "0.5";
	if (indexOfFree >= 0) {
		free = memStr.substring(indexOfUsed + 7, indexOfFree).trim();
		double freeN = Double.parseDouble(free);
		free = "" + (freeN / 1024.0);
	}
	return new String[] { used, free };
    }

源码地址:

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