我正在使用TimeSeries jfreechart来显示网络性能。我想显示以秒为单位的总时间,但它只显示从0到59的秒数,然后再次将秒重置为0.我必须显示最近120秒的数据。 / p>
这是代码: 此功能用于创建图表:
private JFreeChart createChart(XYDataset xydataset) {
result = ChartFactory.createTimeSeriesChart("admin0", "", "MBytes/S", xydataset, true, true, true);
TextTitle objTitle = new TextTitle("admin0", new Font("Verdana", Font.BOLD, 12));
result.setTitle(objTitle);
final XYPlot plot = result.getXYPlot();
plot.setDomainGridlinesVisible(true);
plot.setRangeGridlinesVisible(true);
plot.setBackgroundPaint(Color.WHITE);
plot.setRangeGridlinePaint(Color.GRAY);
plot.setDomainGridlinePaint(Color.GRAY);
DateAxis xaxis = (DateAxis)plot.getDomainAxis();
xaxis.setAutoRange(true); ////set true to move graph with time.
xaxis.setFixedAutoRange(120000.0);
xaxis.setTickUnit(new DateTickUnit(DateTickUnit.SECOND, 15, new SimpleDateFormat("ss")));
NumberAxis range = (NumberAxis) plot.getRangeAxis();///y-Axis
range.setRange(0.0, 1.0);
range.setTickUnit(new NumberTickUnit(0.2));
XYItemRenderer renderer = plot.getRenderer();
renderer.setSeriesPaint(0, Color.RED);
renderer.setSeriesPaint(1, Color.GREEN);
return result;
}
以下是创建数据集的代码:
private XYDataset createAdmin0DatasetTest() {
TimeSeriesCollection dataset = new TimeSeriesCollection();
try
{
if(performanceData != null)
{
long speed = 0;
double recieveRate = 0;
double sendRate = 0;
long timeinMilli = 0;
long devider = 4294967296l;
long snapTime = 0;
Vector admin0Vec = (Vector)this.performanceData.get("admin0");
if(admin0Vec != null && admin0Vec.size() > 0)
{
Vector innerVec = (Vector)admin0Vec.get(0);
recieveRate = Long.parseLong(innerVec.get(2).toString());
sendRate = Long.parseLong(innerVec.get(1).toString());
timeinMilli = Long.parseLong(innerVec.get(0).toString());
}catch(Exception ex)
{
System.out.println("Exception in adding same values");
}
for(int i = 1 ; i < admin0Vec.size() ; i++)
{
innerVec = (Vector)admin0Vec.get(i);
recieveRate = Long.parseLong(innerVec.get(2).toString());
sendRate = Long.parseLong(innerVec.get(1).toString());
timeinMilli = Long.parseLong(innerVec.get(0).toString());
try
{
this.adminRecieve.addOrUpdate(new Second(new Date(timeinMilli)), recieveRate);
this.adminSend.addOrUpdate(new Second(new Date(timeinMilli)), sendRate);
}catch(Exception ex)
{
System.out.println("Exception in adding same values");
//ex.printStackTrace();
}
}
dataset = new TimeSeriesCollection(this.adminRecieve);
dataset.addSeries(adminSend);
}
}
}catch(Exception ex)
{
ex.printStackTrace();
}
return dataset;
}
请帮帮我
答案 0 :(得分:1)
提示:
您正在使用DateAxis
作为域轴并将其渲染为秒,因此它肯定只显示数据的秒部分而不计算任何总计。此外,它不必从零开始,只显示120秒的数据。
你想要的不是时间序列,即数字与时间的关系,而是数字与数字的数据序列(经过的秒数)。因此,以这种方式构建它并使用NumberAxis
作为域。
注意:上面的内容是为了真正显示总的经过时间,例如:对于秒480和600之间的数据,标签将是例如480,500,520,540,560,580,600(即总数,如标题中所述,因为某些时刻)。如果问题是要有静态标签,例如-120,-100,-80,-60,-40,-20,0,移动数据然后在轴上设置刻度和标签需要以不同方式完成。