JFreeChart_BarChart

package com.jfreechart;import java.awt.Color;import java.awt.Font;import java.io.FileOutputStream;import java.io.IOException;import java.util.Random;import org.jfree.chart.ChartFactory;import org.jfree.chart.ChartUtilities;import org.jfree.chart.JFreeChart;import org.jfree.chart.axis.CategoryAxis;import org.jfree.chart.axis.CategoryLabelPositions;import org.jfree.chart.axis.NumberAxis;import org.jfree.chart.labels.StandardCategoryItemLabelGenerator;import org.jfree.chart.plot.CategoryPlot;import org.jfree.chart.plot.IntervalMarker;import org.jfree.chart.plot.PlotOrientation;import org.jfree.chart.renderer.category.BarRenderer;import org.jfree.chart.title.TextTitle;import org.jfree.data.category.DefaultCategoryDataset;import org.jfree.ui.Layer;import org.jfree.ui.RectangleAnchor;import org.jfree.ui.TextAnchor;/** * * @ClassName: JFreeChart_BarChart * @author xialong * @date Jan 25, 2011 6:36:12 PM * @Description: * JFreeChart生成柱状图 * */@SuppressWarnings("deprecation")public class JFreeChart_BarChart {public static void main(String[] arg){try {print();} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}}/** * 输出图片 * @throws IOException */public static void print() throws IOException{FileOutputStream fos = new FileOutputStream("D://jfreechart//barChart"+System.currentTimeMillis()+".jpg");ChartUtilities.writeChartAsJPEG(fos,//输出到那个流，1, //图片质量，0~1createChart(), //图表对象900,//宽600,//高null//ChartRenderingInfo信息);fos.close();}/** * 产生JFreeChart对象 * @return */private static JFreeChart createChart(){JFreeChart chart = null;//平面//chart = ChartFactory.createBarChart("", "X轴", "Y轴", createDateSet(), //PlotOrientation.VERTICAL, true, false, false);//3Dchart = ChartFactory.createBarChart3D("","X轴", "Y轴", createDateSet(),PlotOrientation.VERTICAL, true, false, false);TextTitle title = new TextTitle("测试柱状图", new Font("宋体", Font.BOLD, 20));// 解决曲线图片标题中文乱码问题chart.setTitle(title);//获得 plot：CategoryPlot！！CategoryPlot barplot = chart.getCategoryPlot();//取得x轴CategoryAxis domainAxis = barplot.getDomainAxis();setDomainAxis(domainAxis);//取得Y轴NumberAxis numberAxis = (NumberAxis)barplot.getRangeAxis();setNumberAxis(numberAxis);//获得renderer 注意这里是下嗍造型到BarRenderer！！BarRenderer barrenderer = (BarRenderer)barplot.getRenderer(); //显示每个柱的数值，并修改该数值的字体属性;barrenderer.setBaseItemLabelGenerator(new StandardCategoryItemLabelGenerator());barrenderer.setBaseItemLabelFont(new Font("黑体",Font.BOLD,12));barrenderer.setBaseItemLabelsVisible(true);/*// Bar的外轮廓线不画barrenderer.setDrawBarOutline(true); //设定特定颜色GradientPaint gradientpaint = new GradientPaint(0.0F, 0.0F, Color.blue,0.0F, 0.0F, new Color(0, 0, 64)); GradientPaint gradientpaint1 = new GradientPaint(0.0F, 0.0F, Color.green,0.0F, 0.0F, new Color(0, 64, 0));GradientPaint gradientpaint2 = new GradientPaint(0.0F, 0.0F, Color.red,0.0F, 0.0F, new Color(64, 0, 0));//给series1 Bar设定上面定义的颜色barrenderer.setSeriesPaint(0, gradientpaint); //给series2 Bar 设定上面定义的颜色barrenderer.setSeriesPaint(1, gradientpaint1); //给series3 Bar 设定上面定义的颜色barrenderer.setSeriesPaint(2, gradientpaint2); *///增加一个标记块//标记区间IntervalMarker intervalmarker = new IntervalMarker(11*0.6, 11.5D);//标记显示名称intervalmarker.setLabel("标记");//名称字体intervalmarker.setLabelFont(new Font("黑体", Font.PLAIN, 11));//名称显示位子intervalmarker.setLabelAnchor(RectangleAnchor.TOP_LEFT);//设置标记块的位置intervalmarker.setLabelTextAnchor(TextAnchor.CENTER_LEFT);//标记块颜色intervalmarker.setPaint(new Color(222, 222, 255, 128));//将标记块注册到显示区域，并设置样式barplot.addRangeMarker(intervalmarker, Layer.BACKGROUND);return chart;}/** * 设置X轴 * @param domainAxis */private static void setDomainAxis(CategoryAxis domainAxis){//设置x轴标题字体domainAxis.setLabelFont(new Font("宋体",Font.BOLD,12));// 解决x轴坐标上中文乱码domainAxis.setTickLabelFont(new Font("sans-serif", Font.PLAIN, 11));//x轴坐标上倾斜45°显示domainAxis.setCategoryLabelPositions(CategoryLabelPositions.UP_45);}/** * 设置Y轴 * @param numberAxis */private static void setNumberAxis(NumberAxis numberaxis){//设置Y间隔//numberaxis.setTickUnit(new NumberTickUnit(2));// 解决Y轴标题中文乱码numberaxis.setLabelFont(new Font("sans-serif", Font.PLAIN, 14));}/** * 产生数据源 * @return */private static DefaultCategoryDataset createDateSet(){DefaultCategoryDataset dataset = new DefaultCategoryDataset();int i = 0;Random rand = new Random();while (i < 3) {for (int j = 1; j < 10; j++) {int value=rand.nextInt(10)+2;dataset.addValue(value, "series" + i,"x轴"+j);}i++;}return dataset;}}

 

输出图片如下：