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 block
			e.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，0~1
										createChart(), //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);
		//3D
		chart = 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：