import java.awt.Color
import java.awt.GradientPaint
import org.jfree.chart.ChartFactory
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.plot.CategoryPlot
import org.jfree.chart.plot.PlotOrientation
import org.jfree.chart.renderer.category.BarRenderer
import org.jfree.chart.renderer.category.BarRenderer3D
import org.jfree.data.category.CategoryDataset
import org.jfree.data.category.DefaultCategoryDataset
import org.jfree.data.general.DatasetUtilities
/**
* 柱状图测试
* @author xjh
*
*/
public class BarChartTest {
/**
* 得到2D柱状图的数据集合
*
* @return
*/
private CategoryDataset getDataset2D() {
String str1 = "First"
String str2 = "Second"
String str3 = "Third"
String str4 = "Category 1"
String str5 = "Category 2"
String str6 = "Category 3"
String str7 = "Category 4"
String str8 = "Category 5"
DefaultCategoryDataset localDefaultCategoryDataset = new DefaultCategoryDataset()
localDefaultCategoryDataset.addValue(1.0D, str1, str4)
localDefaultCategoryDataset.addValue(4.0D, str1, str5)
localDefaultCategoryDataset.addValue(3.0D, str1, str6)
localDefaultCategoryDataset.addValue(5.0D, str1, str7)
localDefaultCategoryDataset.addValue(5.0D, str1, str8)
localDefaultCategoryDataset.addValue(5.0D, str2, str4)
localDefaultCategoryDataset.addValue(7.0D, str2, str5)
localDefaultCategoryDataset.addValue(6.0D, str2, str6)
localDefaultCategoryDataset.addValue(8.0D, str2, str7)
localDefaultCategoryDataset.addValue(4.0D, str2, str8)
localDefaultCategoryDataset.addValue(4.0D, str3, str4)
localDefaultCategoryDataset.addValue(3.0D, str3, str5)
localDefaultCategoryDataset.addValue(2.0D, str3, str6)
localDefaultCategoryDataset.addValue(3.0D, str3, str7)
localDefaultCategoryDataset.addValue(6.0D, str3, str8)
return localDefaultCategoryDataset
}
/**
* 创建2D柱状图
*
* @param paramCategoryDataset
* @return
*/
public JFreeChart createBarChart2D() {
//得到2D柱状图的数据集合
CategoryDataset paramCategoryDataset = getDataset2D()
//创建柱状图
JFreeChart localJFreeChart = ChartFactory.createBarChart(
"Bar Chart Demo", "Category", "Value", paramCategoryDataset,
PlotOrientation.VERTICAL, true, true, false)
//设置柱状图属性
localJFreeChart.setBackgroundPaint(Color.white)
//获取柱状图的标注点集合
CategoryPlot localCategoryPlot = localJFreeChart.getCategoryPlot()
//设置标注点的背景色
localCategoryPlot.setBackgroundPaint(Color.lightGray)
//设置绘制区域的方格线的颜色
localCategoryPlot.setDomainGridlinePaint(Color.white)
//是方格线可见
localCategoryPlot.setDomainGridlinesVisible(true)
//设置方格线变动绘制颜色
localCategoryPlot.setRangeGridlinePaint(Color.white)
//得到数值坐标轴
NumberAxis localNumberAxis = (NumberAxis) localCategoryPlot
.getRangeAxis()
//设置坐标轴单元
localNumberAxis.setStandardTickUnits(NumberAxis
.createIntegerTickUnits())
//得到柱状图渲染器
BarRenderer localBarRenderer = (BarRenderer) localCategoryPlot
.getRenderer()
//如果超出绘制区域边界将不可见
localBarRenderer.setDrawBarOutline(false)
//创建倾斜度对象
GradientPaint localGradientPaint1 = new GradientPaint(0.0F, 0.0F,
Color.blue, 0.0F, 0.0F, new Color(0, 0, 64))
GradientPaint localGradientPaint2 = new GradientPaint(0.0F, 0.0F,
Color.green, 0.0F, 0.0F, new Color(0, 64, 0))
GradientPaint localGradientPaint3 = new GradientPaint(0.0F, 0.0F,
Color.red, 0.0F, 0.0F, new Color(64, 0, 0))
//为渲染器设置倾斜度
localBarRenderer.setSeriesPaint(0, localGradientPaint1)
localBarRenderer.setSeriesPaint(1, localGradientPaint2)
localBarRenderer.setSeriesPaint(2, localGradientPaint3)
//旋转坐标轴
CategoryAxis localCategoryAxis = localCategoryPlot.getDomainAxis()
localCategoryAxis.setCategoryLabelPositions(CategoryLabelPositions
.createUpRotationLabelPositions(0.5235987755982988D))
return localJFreeChart
}
/**
* 创建3D柱状图
*
* @return
*/
public JFreeChart createBarChart3D() {
// 设置坐标点
double[][] arrayOfDouble = { { 10.0D, 4.0D, 15.0D, 14.0D },
{ -5.0D, -7.0D, 14.0D, -3.0D }, { 6.0D, 17.0D, -12.0D, 7.0D },
{ 7.0D, 15.0D, 11.0D, 0.0D }, { -8.0D, -6.0D, 10.0D, -9.0D },
{ 9.0D, 8.0D, 0.0D, 6.0D }, { -10.0D, 9.0D, 7.0D, 7.0D },
{ 11.0D, 13.0D, 9.0D, 9.0D }, { -3.0D, 7.0D, 11.0D, -10.0D } }
// 创建图表的数据集合，第一个参数：横坐标的文字说明；第二个参数：纵坐标的文字说明；第三个参数：坐标数组
CategoryDataset paramCategoryDataset = DatasetUtilities
.createCategoryDataset("Series ", "Category ", arrayOfDouble)
// 创建3D图表
JFreeChart localJFreeChart = ChartFactory.createBarChart3D(
"3D Bar Chart Demo", "Category", "Value", paramCategoryDataset,
PlotOrientation.VERTICAL, true, true, false)
// 得到横坐标点集合对象
CategoryPlot localCategoryPlot = localJFreeChart.getCategoryPlot()
// 设置方格可见
localCategoryPlot.setDomainGridlinesVisible(true)
// 得到坐标轴
CategoryAxis localCategoryAxis = localCategoryPlot.getDomainAxis()
// 设置标注点位置
localCategoryAxis.setCategoryLabelPositions(CategoryLabelPositions
.createUpRotationLabelPositions(0.3926990816987241D))
// 创建3D柱状图渲染对象
BarRenderer3D localBarRenderer3D = (BarRenderer3D) localCategoryPlot
.getRenderer()
// 设置超出边界不可见
localBarRenderer3D.setDrawBarOutline(false)
// 返回图表对象
return localJFreeChart
}
}
JFreeChart是JAVA平台上的一个开放的图表绘制类库。它完全使用JAVA语言编写，是为applications, applets, servlets 以及JSP等使用所设计。JFreeChart可生成饼图（pie charts）、柱状图（bar charts）、散点图（scatter plots）、时序图（time series）、甘特图（Gantt charts）等等多种图表，并且可以产生PNG和JPEG格式的输出，还可以与PDF和EXCEL关联。JFreeChart的主页地址为：
http://www.jfree.org/jfreechart/index.html
在这里可以找到最新版本的JFreeChart的相关信息，如说明文档、下载连接以及示例图表等。
JFreeChart目前是最好的java图形解决方案，基本能够解决目前的图形方面的需求。
IBM文档：http://www-128.ibm.com/developerworks/cn/java/l-jfreechart/
Javaeye社区：http://www.javaeye.com/search?keyword=jfreechart
