Reporting 报告趋势线
除了显示数据点外,如何在JasperReports中创建一条数据趋势线?以下是拍摄前后的照片: 以前 之后 时间序列报告似乎没有任何这样的选项来绘制橙色线。橙色的线条应该平滑、更细,但这是一般的想法Reporting 报告趋势线,reporting,jasper-reports,ireport,Reporting,Jasper Reports,Ireport,除了显示数据点外,如何在JasperReports中创建一条数据趋势线?以下是拍摄前后的照片: 以前 之后 时间序列报告似乎没有任何这样的选项来绘制橙色线。橙色的线条应该平滑、更细,但这是一般的想法 任何关于如何使用iReport 3.7.1编写此类报告的想法?一个解决方案需要以下各项: BezierLineCustomizer使线条弯曲。 RunningAverageIncrementer根据变量计算运行平均值。 使用RunningAverageIncremeter的iReport变量。
任何关于如何使用iReport 3.7.1编写此类报告的想法?一个解决方案需要以下各项: BezierLineCustomizer使线条弯曲。 RunningAverageIncrementer根据变量计算运行平均值。 使用RunningAverageIncremeter的iReport变量。 BezierLineCustomizer类 RunningAverageIncrementer类 iReport变量 创建一个使用留给读者的RunningAverageIncrementerFactory类练习的变量。将其变量表达式设置为打印值。将其初始值表达式设置为零 花键 设置TimeSeries图表的Customizer类属性以使用BezierLineCustomizer类 结果 经过这些修改后,运行平均值清晰可见:
看起来不错:,但我认为iReport没有这个功能
public class BezierLineCustomizer
implements JRChartCustomizer {
public BezierLineCustomizer() {
}
public void customize( JFreeChart jFreeChart, JRChart jrChart ) {
XYPlot xyPlot = ( XYPlot )jFreeChart.getPlot();
XYSplineRenderer splineRenderer = new XYSplineRenderer();
// Make the spline line thick and orange.
//
splineRenderer.setSeriesShapesVisible( 0, false );
splineRenderer.setSeriesShapesVisible( 1, false );
splineRenderer.setSeriesLinesVisible( 1, false );
splineRenderer.setSeriesStroke(
0, new BasicStroke(
4.0f, BasicStroke.CAP_ROUND, BasicStroke.JOIN_ROUND,
1.0f, null, 0.0f
)
);
splineRenderer.setSeriesPaint( 0, new Color( 255, 140, 0 ) );
splineRenderer.setSeriesVisibleInLegend( 1, Boolean.FALSE );
// Duplicate the data into a new dataset to control its line independently.
//
xyPlot.setDataset( 1, xyPlot.getDataset(0) );
XYItemRenderer defaultRenderer = new XYLineAndShapeRenderer();
defaultRenderer.setSeriesVisible( 0, Boolean.FALSE );
defaultRenderer.setSeriesVisibleInLegend( 0, Boolean.FALSE );
xyPlot.setRenderer( 1, defaultRenderer );
xyPlot.setRenderer( 0, splineRenderer );
}
}
public class RunningAverageIncrementer
implements JRIncrementer {
/** Default number of tallies. */
private static final int DEFAULT_TALLIES = 128;
/** Number of tallies within the sliding window. */
private static final int DEFAULT_SLIDING_WINDOW_SIZE = 30;
/** Stores a sliding window of values. */
private List<Double> values = new ArrayList<Double>( DEFAULT_TALLIES );
/**
* Instantiated by the RunningAverageIncrementerFactory class.
*/
public RunningAverageIncrementer() {
}
/**
* Calculates the average of previously known values.
* @return The average of the list of values returned by getValues().
*/
private double calculateAverage() {
double result = 0.0;
List<Double> values = getValues();
for( Double d: getValues() ) {
result += d.doubleValue();
}
return result / values.size();
}
/**
* Called each time a new value to be averaged is received.
* @param value The new value to include for the average.
*/
private void recordValue( Double value ) {
List<Double> values = getValues();
// Throw out
//
if( values.size() > getSlidingWindowSize() ) {
values.remove( 0 );
}
this.values.add( value );
}
private List<Double> getValues() {
return values;
}
private int getIterations() {
return getValues().size();
}
/**
* Returns the newly incremented value, which is calculated by averaging
* the previous value from the previous call to this method.
*
* @param jrFillVariable Unused.
* @param tally New data point to average.
* @param abstractValueProvider Unused.
* @return The newly incremented value.
*/
public Object increment( JRFillVariable jrFillVariable, Object tally,
AbstractValueProvider abstractValueProvider ) {
double value = ((Number)tally).doubleValue();
recordValue( value );
double previousAverage = calculateAverage();
double newAverage =
( ( value - previousAverage ) / ( getIterations() + 1 ) ) + previousAverage;
return new BigDecimal( newAverage );
}
protected int getSlidingWindowSize() {
return DEFAULT_SLIDING_WINDOW_SIZE;
}
}