Package org.apache.struts2.dispatcher
Class ChartResult
java.lang.Object
org.apache.struts2.result.StrutsResultSupport
org.apache.struts2.dispatcher.ChartResult
- All Implemented Interfaces:
Serializable
,Result
,StrutsStatics
A custom Result type for chart data. Built on top of JFreeChart. When executed this Result will write the given chart as a PNG or JPG to the servlet output stream.
This result type takes the following parameters:
- value - the name of the JFreeChart object on the ValueStack, defaults to 'chart'.
- type - the render type for this chart. Can be jpg (or jpeg) or png. Defaults to png.
- width (required) - the width (in pixels) of the rendered chart.
- height (required) - the height (in pixels) of the rendered chart.
Example:
public class ExampleChartAction extends ActionSupport { private JFreeChart chart; public String execute() throws Exception { // chart creation logic... XYSeries dataSeries = new XYSeries(new Integer(1)); // pass a key for this serie for (int i = 0; i <= 100; i++) { dataSeries.add(i, RandomUtils.nextInt()); } XYSeriesCollection xyDataset = new XYSeriesCollection(dataSeries); ValueAxis xAxis = new NumberAxis("Raw Marks"); ValueAxis yAxis = new NumberAxis("Moderated Marks"); // set my chart variable chart = new JFreeChart( "Moderation Function", JFreeChart.DEFAULT_TITLE_FONT, new XYPlot( xyDataset, xAxis, yAxis, new StandardXYItemRenderer(StandardXYItemRenderer.LINES)), false); chart.setBackgroundPaint(java.awt.Color.white); return SUCCESS; } // this method will get called if we specify <param name="value">chart</param> public JFreeChart getChart() { return chart; } } <result name="success" type="chart"> <param name="value">chart</param> <param name="type">png</param> <param name="width">640</param> <param name="height">480</param> </result>
- See Also:
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Field Summary
Fields inherited from class org.apache.struts2.result.StrutsResultSupport
DEFAULT_PARAM, DEFAULT_URL_ENCODING, parseLocation
Fields inherited from interface org.apache.struts2.StrutsStatics
ACTION_MAPPING, HTTP_REQUEST, HTTP_RESPONSE, PAGE_CONTEXT, SERVLET_CONTEXT, SERVLET_DISPATCHER, STRUTS_ACTION_TAG_INVOCATION
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Constructor Summary
Constructors -
Method Summary
Methods inherited from class org.apache.struts2.result.StrutsResultSupport
conditionalParse, conditionalParseCollection, execute, getLastFinalLocation, getLocation, setEncode, setLocation, setParse
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Constructor Details
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ChartResult
public ChartResult() -
ChartResult
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Method Details
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getHeight
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setHeight
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getWidth
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setWidth
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getType
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setType
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getValue
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setValue
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getChart
public org.jfree.chart.JFreeChart getChart() -
setChart
public void setChart(org.jfree.chart.JFreeChart chart) -
doExecute
Executes the result. Writes the given chart as a PNG or JPG to the servlet output stream.- Specified by:
doExecute
in classStrutsResultSupport
- Parameters:
invocation
- an encapsulation of the action execution state.- Throws:
Exception
- if an error occurs when creating or writing the chart to the servlet output stream.
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