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用jfreechart

jfreechart繪制柱狀圖

import java.io.File;

import java.io.IOException;

import org.jfree.chart.ChartFactory;

import org.jfree.chart.ChartUtilities;

import org.jfree.chart.JFreeChart;

import org.jfree.chart.plot.PlotOrientation;

import org.jfree.data.category.DefaultCategoryDataset;

/*

* 繪制柱狀圖

*你亮哥

* */

public class BarChart3DDemo

{

public static void main(String[] args)

{

try

{

//設置主題

ChartFactory.setChartTheme(Theme.getTheme());

//構造數據

DefaultCategoryDataset dataset = new DefaultCategoryDataset();

dataset.addValue(100, "JAVA","1");

dataset.addValue(200, "js","1");

dataset.addValue(200, "C++", "2");

dataset.addValue(300, "C", "3");

dataset.addValue(400, "HTML", "4");

dataset.addValue(400, "CSS", "5");

/*

* public static JFreeChart createBarChart3D(

* java.lang.String title, 設置圖表的標e68a84e8a2ad62616964757a686964616f31333330343839題

* java.lang.String categoryAxisLabel, 設置分類軸的標示

* java.lang.String valueAxisLabel, 設置值軸的標示

* CategoryDataset dataset, 設置數據

* PlotOrientation orientation, 設置圖表的方向

* boolean legend, 設置是否顯示圖例

* boolean tooltips,設置是否生成熱點工具

* boolean urls) 設置是否顯示url

*/

JFreeChart chart = ChartFactory.createBarChart3D("編程語言統計", "語言",

"學習人數", dataset, PlotOrientation.VERTICAL, true, false,

false);

//保存圖表

ChartUtilities.saveChartAsPNG(new File("E:/chart/BarChart3D.png"), chart, 800, 500);

System.out.println("繪圖完成");

}

catch (IOException e)

{

e.printStackTrace();

}

}

}

===================================================================================

//一條線 有點 有數

package Test;

import java.awt.Color;

import java.awt.Font;

import org.jfree.chart.ChartFactory;

import org.jfree.chart.ChartFrame;

import org.jfree.chart.JFreeChart;

import org.jfree.chart.axis.AxisSpace;

import org.jfree.chart.labels.ItemLabelAnchor;

import org.jfree.chart.labels.ItemLabelPosition;

import org.jfree.chart.labels.StandardXYItemLabelGenerator;

import org.jfree.chart.plot.XYPlot;

import org.jfree.chart.renderer.xy.XYItemRenderer;

import org.jfree.chart.renderer.xy.XYLineAndShapeRenderer;

import org.jfree.chart.title.TextTitle;

import org.jfree.data.time.Month;

import org.jfree.data.time.TimeSeries;

import org.jfree.data.time.TimeSeriesCollection;

import org.jfree.ui.RectangleInsets;

import org.jfree.ui.TextAnchor;

public class try123 {

public static void main(String[] args){

//首先構造數據

TimeSeries timeSeries = new TimeSeries("BMI", Month.class);

// 時間曲線數據集合

TimeSeriesCollection lineDataset = new TimeSeriesCollection();

// 構造數據集合

timeSeries.add(new Month(1, 2009), 45);

timeSeries.add(new Month(2, 2009), 46);

timeSeries.add(new Month(3, 2009), 1);

timeSeries.add(new Month(4, 2009), 500);

timeSeries.add(new Month(5, 2009), 43);

timeSeries.add(new Month(6, 2009), 324);

timeSeries.add(new Month(7, 2009), 632);

timeSeries.add(new Month(8, 2009), 34);

timeSeries.add(new Month(9, 2009), 12);

timeSeries.add(new Month(10, 2009), 543);

timeSeries.add(new Month(11, 2009), 32);

timeSeries.add(new Month(12, 2009), 225);

lineDataset.addSeries(timeSeries);

JFreeChart chart = ChartFactory.createTimeSeriesChart("", "date", "bmi", lineDataset, true, true, true);

//增加標題

chart.setTitle(new TextTitle("XXXBMI指數", new Font("隸書", Font.ITALIC, 15)));

chart.setAntiAlias(true);

XYPlot plot = (XYPlot) chart.getPlot();

plot.setAxisOffset(new RectangleInsets(10,10,10,10));//圖片區與坐標軸的距離

plot.setOutlinePaint(Color.PINK);

plot.setInsets(new RectangleInsets(15,15,15,15));//坐標軸與最外延的距離

// plot.setOrientation(PlotOrientation.HORIZONTAL);//圖形的方向，包括坐標軸。

AxisSpace as = new AxisSpace();

as.setLeft(25);

as.setRight(25);

plot.setFixedRangeAxisSpace(as);

chart.setPadding(new RectangleInsets(5,5,5,5));

chart.setNotify(true);

// 設置曲線是否顯示數據點

XYLineAndShapeRenderer xylineandshaperenderer = (XYLineAndShapeRenderer)plot.getRenderer();

xylineandshaperenderer.setBaseShapesVisible(true);

// 設置曲線顯示各數據點的值

XYItemRenderer xyitem = plot.getRenderer();

xyitem.setBaseItemLabelsVisible(true);

xyitem.setBasePositiveItemLabelPosition(new ItemLabelPosition(ItemLabelAnchor.INSIDE10, TextAnchor.BASELINE_LEFT));

xyitem.setBaseItemLabelGenerator(new StandardXYItemLabelGenerator());

xyitem.setBaseItemLabelFont(new Font("Dialog", 1, 14));

plot.setRenderer(xyitem);

//顯示

ChartFrame frame = new ChartFrame("try1", chart);

frame.pack();

frame.setVisible(true);

}

}

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