BlogJava-无为-随笔分类-报表绘制



/* ===========================================================

 * JFreeChart : a free chart library for the Java(tm) platform

 * ===========================================================

 *

 * (C) Copyright 2000-2004, by Object Refinery Limited and Contributors.

 *

 * JFreeChart下载地址:  http://www.jfree.org/jfreechart/index.html

 *

 *--------------------

 * BarChart3DDemo2.java

 * --------------------

 */



package org.jfree.chart.demo;



import org.jfree.chart.ChartFactory;

import org.jfree.chart.ChartPanel;

import org.jfree.chart.JFreeChart;

import org.jfree.chart.axis.CategoryAxis;

import org.jfree.chart.axis.CategoryLabelPosition;

import org.jfree.chart.axis.CategoryLabelPositions;

import org.jfree.chart.axis.CategoryLabelWidthType;

import org.jfree.chart.plot.CategoryPlot;

import org.jfree.chart.plot.PlotOrientation;

import org.jfree.data.category.CategoryDataset;

import org.jfree.data.category.DefaultCategoryDataset;

import org.jfree.text.TextBlockAnchor;

import org.jfree.ui.ApplicationFrame;

import org.jfree.ui.RectangleAnchor;

import org.jfree.ui.RefineryUtilities;

import org.jfree.ui.TextAnchor;

import org.jfree.util.Log;

import org.jfree.util.PrintStreamLogTarget;



/**

 * 展示如何创建水平3D棒状图的Demo 

 * 使用数据来自{@link CategoryDataset}.

 *

 */

public class BarChart3DDemo2 extends ApplicationFrame {



    /**

     * 建立一个新的demo.

     *

     * @param title  窗口标题.

     */

    public BarChart3DDemo2(final String title) {



        super(title);

        

        // 创建图表...

        final DefaultCategoryDataset dataset = new DefaultCategoryDataset();

        dataset.addValue(23.0, "Series 1", "London");

        dataset.addValue(14.0, "Series 1", "New York");

        dataset.addValue(14.0, "Series 1", "Istanbul");

        dataset.addValue(14.0, "Series 1", "Cairo");

        dataset.addValue(13.0, "Series 2", "London");

        dataset.addValue(19.0, "Series 2", "New York");

        dataset.addValue(19.0, "Series 2", "Istanbul");

        dataset.addValue(19.0, "Series 2", "Cairo");

        dataset.addValue(7.0, "Series 3", "London");

        dataset.addValue(9.0, "Series 3", "New York");

        dataset.addValue(9.0, "Series 3", "Istanbul");

        dataset.addValue(9.0, "Series 3", "Cairo");

        

        final JFreeChart chart = createChart(dataset);

        

        //把图表放到面板容器...

        final ChartPanel chartPanel = new ChartPanel(chart);

        chartPanel.setPreferredSize(new java.awt.Dimension(500, 270));

        setContentPane(chartPanel);



    }



    /**

     * 先建个表再说.

     * 

     * @param dataset  the dataset.

     * 

     * @return The chart.

     */

    private JFreeChart createChart(final CategoryDataset dataset) {

        

        final JFreeChart chart = ChartFactory.createBarChart3D(

            "3D Bar Chart Demo 2",       // 表题

            "Category",                  // 域坐标标签

            "Value",                     // 横坐标标签

            dataset,                     // 数据

            PlotOrientation.HORIZONTAL,  // 方向

            true,                        // 包含摘要

            true,                        // 工具提示

            false                        // urls

        );



        final CategoryPlot plot = chart.getCategoryPlot();

        plot.setForegroundAlpha(1.0f);



        // 分类标签左对齐...

        final CategoryAxis axis = plot.getDomainAxis();

        final CategoryLabelPositions p = axis.getCategoryLabelPositions();

        

        final CategoryLabelPosition left = new CategoryLabelPosition(

            RectangleAnchor.LEFT, TextBlockAnchor.CENTER_LEFT, 

            TextAnchor.CENTER_LEFT, 0.0,

            CategoryLabelWidthType.RANGE, 0.30f

        );

        axis.setCategoryLabelPositions(CategoryLabelPositions.replaceLeftPosition(p, left));

        

        return chart;        

    

    }

    

    /**

     * demo程序的起始点.

     *

     * @param args  ignored.

     */

    public static void main(final String[] args) {



        Log.getInstance().addTarget(new PrintStreamLogTarget());

        final BarChart3DDemo2 demo = new BarChart3DDemo2("3D Bar Chart Demo 2");

        demo.pack();

        RefineryUtilities.centerFrameOnScreen(demo);

        demo.setVisible(true);



    }



}





           

本文所使用的版本为：jfreechart-1.0.0-rc1.zip 可