JFreeChart_LineChart

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.PlotOrientation;import org.jfree.chart.renderer.category.LineAndShapeRenderer;import org.jfree.chart.title.TextTitle;import org.jfree.data.category.DefaultCategoryDataset;/** * * @ClassName: JFreeChart_LineChart * @author xialong * @date Jan 25, 2011 5:30:04 PM * @Description: * JFreeChart生成折线图 */public class JFreeChart_LineChart {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//LineChart"+System.currentTimeMillis()+".jpg");ChartUtilities.writeChartAsJPEG(fos,//输出到那个流，1, //图片质量，0~1getJFreeChart(), //图表对象800,//宽600,//高null//ChartRenderingInfo信息);fos.close();}/** * 产生JFreeChart对象 * * @return */public static JFreeChart getJFreeChart() {JFreeChart imgChart=null;// JFreeChart对象 参数：标题，目录轴显示标签，数值轴显示标签，数据集，是否显示图例，是否生成工具，是否生成URL连接//平面imgChart = ChartFactory.createLineChart("", "X轴", "Y轴",getDataSet(), PlotOrientation.VERTICAL, true, true, false);//3D//imgChart = ChartFactory.createLineChart3D("", "X轴", "Y轴",//getDataSet(), PlotOrientation.VERTICAL, true, true, false);imgChart.setBackgroundPaint(Color.white);imgChart.setBorderVisible(true);// 边框可见TextTitle title = new TextTitle("测试曲线图", new Font("宋体", Font.BOLD, 20));// 解决曲线图片标题中文乱码问题imgChart.setTitle(title);//解决图表底部中文乱码问题imgChart.getLegend().setItemFont(new Font("宋体", Font.PLAIN, 12));CategoryPlot categoryplot = (CategoryPlot) imgChart.getPlot();categoryplot.setBackgroundPaint(Color.lightGray);categoryplot.setRangeGridlinePaint(Color.white);// Y轴NumberAxis numberaxis = (NumberAxis) categoryplot.getRangeAxis();setNumberAxis(numberaxis);// x轴CategoryAxis domainAxis = (CategoryAxis) categoryplot.getDomainAxis();setDomainAxis(domainAxis);LineAndShapeRenderer lineandshaperenderer = (LineAndShapeRenderer) categoryplot.getRenderer();// 数据点// series 点（即数据点）可见lineandshaperenderer.setBaseShapesVisible(true);// 显示数据点的数据lineandshaperenderer.setBaseItemLabelGenerator(new StandardCategoryItemLabelGenerator()); // 显示折线图点上的数据lineandshaperenderer.setBaseItemLabelsVisible(true);return imgChart;}/** * 设置X轴 * @param domainAxis */private static void setDomainAxis(CategoryAxis domainAxis){// 解决x轴坐标上中文乱码domainAxis.setTickLabelFont(new Font("sans-serif", Font.PLAIN, 11));// 解决x轴标题中文乱码domainAxis.setLabelFont(new Font("宋体", Font.PLAIN, 14));// 用于显示X轴刻度domainAxis.setTickMarksVisible(true);//设置X轴45度domainAxis.setCategoryLabelPositions(CategoryLabelPositions.UP_45);}/** * 设置Y轴 * @param numberAxis */private static void setNumberAxis(NumberAxis numberaxis){numberaxis.setStandardTickUnits(NumberAxis.createIntegerTickUnits());// 是否显示零点numberaxis.setAutoRangeIncludesZero(true);numberaxis.setAutoTickUnitSelection(false);// 解决Y轴标题中文乱码numberaxis.setLabelFont(new Font("sans-serif", Font.PLAIN, 14));// numberaxis.setTickUnit(new NumberTickUnit(10000));//Y轴数据间隔}/** * 产生数据源 * * @return */private static DefaultCategoryDataset getDataSet() {DefaultCategoryDataset defaultcategorydataset = new DefaultCategoryDataset();int i = 0;Random rand = new Random();while (i < 3) {for (int j = 1; j < 10; j++) {defaultcategorydataset.addValue(rand.nextInt(10), "series" + i,"x轴"+j);}i++;}return defaultcategorydataset;}}

 

输入图片如下：