JFreechart完整柱状图.docx

JFreechart完整柱状图import java.io.IOException;public class AttendanceMain publicstaticvoidmain(String args) throws IOExceptiondouble data = newdouble100,96,98,95,99,100,92,93,91,94,96,97,96,98,95,99,100,92,93,91,94,96,97,96,98,95,99,100,92,93,91,94,96,97,96,98,95,99,100,92,93,91,94,96;String columnKeys = 测控1班, 测控2班, 信号1班, 信号2班, 信号3班 ,计通1班,计通2班,城轨1班,城轨2班,计应1班,计应2班;String rowKeys=2009级,2010级,2011级,2012级;newAttendance(data,rowKeys,columnKeys );/at.setSubstring(第八周);import java.awt.Color;import java.awt.Font;import java.awt.RenderingHints;import java.io.FileOutputStream;import java.io.IOException;import org.jfree.chart.ChartFactory;import org.jfree.chart.ChartUtilities;import org.jfree.chart.JFreeChart;import org.jfree.chart.axis.AxisLocation;import org.jfree.chart.axis.CategoryAxis;import org.jfree.chart.axis.CategoryLabelPositions;import org.jfree.chart.axis.ValueAxis;import org.jfree.chart.labels.StandardCategoryItemLabelGenerator;import org.jfree.chart.plot.CategoryPlot;import org.jfree.chart.plot.PlotOrientation;import org.jfree.chart.renderer.category.BarRenderer;import org.jfree.chart.title.TextTitle;import org.jfree.data.category.CategoryDataset;import org.jfree.data.general.DatasetUtilities;public class Attendance /*private String subtitle;public void setSubstring(String sub)subtitle=sub;*/public Attendance(double data,String rowKeys,String columnKeys )throws IOException CategoryDataset dataset = DatasetUtilities.createCategoryDataset(rowKeys, columnKeys, data);JFreeChart chart = ChartFactory.createBarChart( 计算机与通信工程系各班出勤率, /图表标题 班级, /目录轴的显示标签 出勤率(%), /数值轴的显示标签 dataset, /数据集 PlotOrientation.VERTICAL, /图表方向：水平 /PlotOrientation.HORIZONTAL, /图表方向：垂直 true, false, false);/设置背景颜色chart.setBackgroundPaint(Color.cyan);CategoryPlotplot=chart.getCategoryPlot();BarRendererrender=(BarRenderer)plot.getRenderer();render.setBaseOutlinePaint(Color.red);/设置详细图表的显示细节部分的背景颜色plot.setBackgroundPaint(Color.lightGray);/设置垂直网格线颜色plot.setDomainGridlinePaint(Color.black);/设置是否显示垂直网格线plot.setDomainGridlinesVisible(false);/设置水平网格线颜色plot.setRangeGridlinePaint(Color.black);/设置是否显示水平网格线plot.setRangeGridlinesVisible(false);/设置X轴标题的倾斜程度CategoryAxisdomainAxis=plot.getDomainAxis();domainAxis.setCategoryLabelPositions(CategoryLabelPositions.createUpRotationLabelPositions(Math.PI/6.0);/设置柱状体与图片边框的左右间距domainAxis.setLowerMargin(0.005);domainAxis.setUpperMargin(0.005);/设置柱状体与图片边框的上下间距ValueAxisrAxis=plot.getRangeAxis();rAxis.setUpperMargin(0.05);rAxis.setLowerMargin(0.005);/设置每组柱状体之间的间隔render.setItemMargin(0.01);/设置柱的透明度plot.setForegroundAlpha(1.0f);chart.getRenderingHints().put(RenderingHints.KEY_TEXT_ANTIALIASING,RenderingHints.VALUE_TEXT_ANTIALIAS_OFF);/设置标题的字体TextTitletextTitle=chart.getTitle();textTitle.setFont(new Font(华文行楷,Font.PLAIN,40);/设置副标题chart.addSubtitle(new TextTitle(第八周);/chart.setTitle(subtitle);/设置X轴坐标上的文字字体domainAxis.setTickLabelFont(new Font(华文行楷,Font.PLAIN,20);/设置X轴的标题文字字体domainAxis.setLabelFont(new Font(华文行楷,Font.PLAIN,20);/设置Y轴坐标上的文字标题rAxis.setTickLabelFont(new Font(华文行楷,Font.PLAIN,20);/设置Y轴的标题文字字体chart.getLegend().setItemFont(new Font(华文行楷,Font.PLAIN,20);/设置上下左右显示位置plot.setDomainAxisLocation(AxisLocation.TOP_OR_LEFT); plot.setRangeAxisLocation(AxisLocation.BOTTOM_OR_LEFT);/这句代码解决了底部汉字乱码的问题rAxis.setLabelFont(new Font(华文行楷,Font.PLAIN,20);/显示每个柱的数值，并修改该数值的字体属性render.setBaseItemLabelGenerator(new StandardCategoryItemLabelGenerator();/显示每个柱的数值 render.setBaseItemLabelsVisible(true); /注意：此句很关键，若无此句，那数字的显示会被覆盖，给人数字没有显示出来的问题 /render.setBasePositiveItemLabelPosition(new ItemLabelPosition( render.OUTSIDE12, TextAnchor.BASELINE_CENTER); render.setItemLabelAnchorOffset(10D);/ 设置柱形图上的文字偏离值 /render.setItemLabelsVisible(true); plot.setRenderer(render);/使用我们设计的效果/设置纵横坐标的显示位置/学校显示在下端(柱子竖直)或左侧(柱子水平)plot.setDomainAxisLocation(AxisLocation.BOTTOM_OR_LEFT);/人数显示在下端(柱子水平)或左侧(柱子竖直)plot.setRangeAxisLocation(AxisLocation.BOTTOM_OR_LEFT); /设定柱子上面的颜色 render.setSeriesPaint(0, Color.black); / 给series1 Bar render.setSeriesPaint(1, Color.decode(#8979FF); / 给series2 Bar render.setSeriesPaint(2, Color.green); / 给series4 Bar render.setSeriesPaint(3, new Color(200, 50, 50); / 给series5 Bar render.setSeriesOutlinePaint(0,Color.BLACK);/边框为黑色 render.setSeriesOutlinePaint(1,Color.BLACK);/边框为黑色 render.setSeriesOutlinePaint(2,Color.BLACK); /边框为黑色 render.setSeriesOutlinePaint(3,Color.BLACK);/边框为黑色 FileOutputStreamgf=null;trygf=ne