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 block
			e.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，0~1
										getJFreeChart(), //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：