jfreechart簡單組合圖形

時間 2019-11-18

標籤 jfreechart 簡單組合圖形简体版

原文原文鏈接

原始需求

接到一個圖表的需求，相似下面這樣的 html

很明顯，這是一個組合圖形，因爲系統用的是java,就選了jfreechart來處理,下面是代碼. java

最終效果

關鍵代碼說明

jfreeChart對象有 categoryplot (只有一個？） git

categoryplot 裏面有render(多個就是組合圖形了) github

若是是組合圖形，CategoryPlot 大有所用(請去看其api) 下面三個處理，都是從這個類找到的api redis

render（渲染，這裏就是對摺線圖,XX圖的描述了,不一樣的圖不一樣render,好比 BarRenderer表明柱狀圖,LineAndShapeRenderer是折線圖) api

AXIS表明座標軸, svg

demo關鍵代碼說明

// 怎麼對render排序 ， 折線圖 不被蓋住就像html中的z-index

categoryplot.setDatasetRenderingOrder(DatasetRenderingOrder.FORWARD);//若是注掉這行，那個折線圖，就被柱狀圖給蓋上了

//寫個標題 函數

CategoryAxis c1 = new CategoryAxis("hello");

CategoryAxis c2 = new CategoryAxis("單位(M)");

CategoryAxis[] cc = {c1,c2};

categoryplot.setDomainAxes(cc);//貌似是標題

//當遇到下面這樣的橫座標 字體

List<Integer> axisIndices = new java.util.ArrayList<Integer>(1);

axisIndices.add(1);

categoryplot.mapDatasetToDomainAxes(1, axisIndices);//這個，沒搞懂，不過能夠成爲上面那樣了,若是注掉這行，會顯示成下面那樣

代碼

main函數 ui

package org.dgm.test.theme.chart;

import java.awt.Font;
import java.io.IOException;
import java.util.List;

import org.dgm.test.util.TestUtils;
import org.jfree.chart.ChartFactory;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.StandardChartTheme;
import org.jfree.chart.axis.CategoryAxis;
import org.jfree.chart.labels.ItemLabelAnchor;
import org.jfree.chart.labels.ItemLabelPosition;
import org.jfree.chart.labels.StandardCategoryItemLabelGenerator;
import org.jfree.chart.labels.StandardCategoryToolTipGenerator;
import org.jfree.chart.plot.CategoryPlot;
import org.jfree.chart.plot.DatasetRenderingOrder;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.chart.renderer.category.BarRenderer;
import org.jfree.chart.renderer.category.LineAndShapeRenderer;
import org.jfree.data.category.DefaultCategoryDataset;
import org.jfree.ui.TextAnchor;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;


public class CombineChart {
	
	static Logger log = LoggerFactory.getLogger(CombineChart.class);

	public static void main(String[] args) throws IOException {
		DefaultCategoryDataset dataset1 = new DefaultCategoryDataset();
		dataset1.addValue(200, "1", "上上週");
		dataset1.addValue(300, "1", "上週");
		dataset1.addValue(400, "1", "這周");
		
		
		DefaultCategoryDataset lineDataset = new DefaultCategoryDataset();// 折線圖數據
		lineDataset.addValue(50, "1", "    ");
		lineDataset.addValue(30, "1", "");
		lineDataset.addValue(45, "1", "  ");
		
		String title = "";
		String categoryAxisLabel = "";
		String valueAxisLabel = "";
		log.info(createFeePieChart( dataset1, 420, 300,
				title, categoryAxisLabel, valueAxisLabel, lineDataset));
		
	}
	
	private static String createFeePieChart(
			DefaultCategoryDataset dataset, int nWidth, int nHeight,
			String title, String categoryAxisLabel, String valueAxisLabel,
			DefaultCategoryDataset lineDataset) throws 
			IOException {

		JFreeChart chart = ChartFactory.createBarChart(title,
				categoryAxisLabel, valueAxisLabel, dataset,
				PlotOrientation.VERTICAL, false, false, false);

		StandardChartTheme standardChartTheme = new StandardChartTheme("CN");
		// 設置標題字體
		standardChartTheme.setExtraLargeFont(new Font("隸書", Font.BOLD, 20));
		// 設置圖例的字體
		standardChartTheme.setRegularFont(new Font("宋書", Font.PLAIN, 15));
		// 設置軸向的字體
		standardChartTheme.setLargeFont(new Font("宋書", Font.PLAIN, 15));
		// 應用主題樣式
		ChartFactory.setChartTheme(standardChartTheme);

		CategoryPlot plot = (CategoryPlot) chart.getCategoryPlot();
		BarRenderer renderer = (BarRenderer) plot.getRenderer();
		// 顯示條目標籤
		renderer.setBaseItemLabelsVisible(true);
		// 設置條目標籤生成器,在JFreeChart1.0.6以前能夠經過renderer.setItemLabelGenerator(CategoryItemLabelGenerator
		// generator)方法實現，可是從版本1.0.6開始有下面方法代替
		renderer
				.setBaseItemLabelGenerator(new StandardCategoryItemLabelGenerator());
//		renderer.setBaseSeriesVisible(false);
		// 設置條目標籤顯示的位置,outline表示在條目區域外,baseline_center表示基於基線且居中
		renderer.setBasePositiveItemLabelPosition(new ItemLabelPosition(
				ItemLabelAnchor.OUTSIDE12, TextAnchor.BASELINE_CENTER));

		// 折線圖
		CategoryPlot categoryplot = (CategoryPlot) chart.getPlot();// 圖自己
		categoryplot.setDataset(1, lineDataset);// 放折線圖數據
//		BarRenderer lineRenderer = new BarRenderer();
		LineAndShapeRenderer lineRenderer = new LineAndShapeRenderer();
		lineRenderer
				.setBaseToolTipGenerator(new StandardCategoryToolTipGenerator());
		lineRenderer.setBaseItemLabelsVisible(true);
		lineRenderer.setBaseItemLabelGenerator(new StandardCategoryItemLabelGenerator());
		lineRenderer.setBasePositiveItemLabelPosition(new ItemLabelPosition(
				ItemLabelAnchor.OUTSIDE12, TextAnchor.BASELINE_CENTER));
//		categoryplot.getDomainAxis(0).setVisible(false);
		categoryplot.setRenderer(1, lineRenderer);
		
		log.info(categoryplot.getDomainAxisCount()+"");
		CategoryAxis c1 = new CategoryAxis("柱狀圖");
		CategoryAxis c2 = new CategoryAxis("");
		CategoryAxis[] cc = {c1,c2};
		categoryplot.setDomainAxes(cc);
		
	    List<Integer> axisIndices = new java.util.ArrayList<Integer>(1);
        axisIndices.add(1);
		categoryplot.mapDatasetToDomainAxes(1, axisIndices);
		
		categoryplot.setDatasetRenderingOrder(DatasetRenderingOrder.FORWARD);
		
		return TestUtils.export(chart,"d:/abc/cd/");
	}
	

	
}

被引用到的java類

ExportUtils:

/* ===========================================================
 * JFreeChart : a free chart library for the Java(tm) platform
 * ===========================================================
 *
 * (C) Copyright 2000-2014, by Object Refinery Limited and Contributors.
 *
 * Project Info:  http://www.jfree.org/jfreechart/index.html
 *
 * This library is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation; either version 2.1 of the License, or
 * (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
 * License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
 * USA.
 *
 * [Oracle and Java are registered trademarks of Oracle and/or its affiliates. 
 * Other names may be trademarks of their respective owners.]
 *
 * ----------------
 * ExportUtils.java
 * ----------------
 * (C) Copyright 2014, by Object Refinery Limited and Contributors.
 *
 * Original Author:  David Gilbert (for Object Refinery Limited);
 * Contributor(s):   -;
 *
 * Changes:
 * --------
 * 27-Jun-2014 : Version 1 (DG);
 *
 */

package org.dgm.test.util;

import java.awt.Graphics2D;
import java.awt.Rectangle;
import java.awt.geom.Rectangle2D;
import java.awt.image.BufferedImage;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.lang.reflect.Constructor;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;

import javax.imageio.ImageIO;

import org.jfree.chart.util.ParamChecks;
import org.jfree.ui.Drawable;

/**
 * Utility functions for exporting charts to SVG and PDF format.
 * 
 * @since 1.0.18
 */
public class ExportUtils {

    /**
     * Returns <code>true</code> if JFreeSVG is on the classpath, and 
     * <code>false</code> otherwise.  The JFreeSVG library can be found at
     * http://www.jfree.org/jfreesvg/
     * 
     * @return A boolean.
     */
    public static boolean isJFreeSVGAvailable() {
        Class<?> svgClass = null;
        try {
            svgClass = Class.forName("org.jfree.graphics2d.svg.SVGGraphics2D");
        } catch (ClassNotFoundException e) {
            // svgClass will be null so the function will return false
        }
        return (svgClass != null);
    }

    /**
     * Returns <code>true</code> if OrsonPDF is on the classpath, and 
     * <code>false</code> otherwise.  The OrsonPDF library can be found at
     * http://www.object-refinery.com/pdf/
     * 
     * @return A boolean.
     */
    public static boolean isOrsonPDFAvailable() {
        Class<?> pdfDocumentClass = null;
        try {
            pdfDocumentClass = Class.forName("com.orsonpdf.PDFDocument");
        } catch (ClassNotFoundException e) {
            // pdfDocument class will be null so the function will return false
        }
        return (pdfDocumentClass != null);
    }

    /**
     * Writes the current content to the specified file in SVG format.  This 
     * will only work when the JFreeSVG library is found on the classpath.
     * Reflection is used to ensure there is no compile-time dependency on
     * JFreeSVG.
     * 
     * @param drawable  the drawable (<code>null</code> not permitted).
     * @param w  the chart width.
     * @param h  the chart height.
     * @param file  the output file (<code>null</code> not permitted).
     */
    public static void writeAsSVG(Drawable drawable, int w, int h, 
            File file) {
        if (!ExportUtils.isJFreeSVGAvailable()) {
            throw new IllegalStateException(
                    "JFreeSVG is not present on the classpath.");
        }
        ParamChecks.nullNotPermitted(drawable, "drawable");
        ParamChecks.nullNotPermitted(file, "file");
        try {
            Class<?> svg2Class = Class.forName(
                    "org.jfree.graphics2d.svg.SVGGraphics2D");
            Constructor<?> c1 = svg2Class.getConstructor(int.class, int.class);
            Graphics2D svg2 = (Graphics2D) c1.newInstance(w, h);
            Rectangle2D drawArea = new Rectangle2D.Double(0, 0, w, h);
            drawable.draw(svg2, drawArea);
            Class<?> svgUtilsClass = Class.forName(
                    "org.jfree.graphics2d.svg.SVGUtils");
            Method m1 = svg2Class.getMethod("getSVGElement", (Class[]) null);
            String element = (String) m1.invoke(svg2, (Object[]) null);
            Method m2 = svgUtilsClass.getMethod("writeToSVG", File.class, 
                    String.class);
            m2.invoke(svgUtilsClass, file, element);
        } catch (ClassNotFoundException ex) {
            throw new RuntimeException(ex);
        } catch (InstantiationException ex) {
            throw new RuntimeException(ex);
        } catch (IllegalAccessException ex) {
            throw new RuntimeException(ex);
        } catch (NoSuchMethodException ex) {
            throw new RuntimeException(ex);
        } catch (SecurityException ex) {
            throw new RuntimeException(ex);
        } catch (IllegalArgumentException ex) {
            throw new RuntimeException(ex);
        } catch (InvocationTargetException ex) {
            throw new RuntimeException(ex);
        }
    }

    /**
     * Writes a {@link Drawable} to the specified file in PDF format.  This 
     * will only work when the OrsonPDF library is found on the classpath.
     * Reflection is used to ensure there is no compile-time dependency on
     * OrsonPDF.
     * 
     * @param drawable  the drawable (<code>null</code> not permitted).
     * @param w  the chart width.
     * @param h  the chart height.
     * @param file  the output file (<code>null</code> not permitted).
     */
    public static final void writeAsPDF(Drawable drawable, 
            int w, int h, File file) {
        if (!ExportUtils.isOrsonPDFAvailable()) {
            throw new IllegalStateException(
                    "OrsonPDF is not present on the classpath.");
        }
        ParamChecks.nullNotPermitted(drawable, "drawable");
        ParamChecks.nullNotPermitted(file, "file");
        try {
            Class<?> pdfDocClass = Class.forName("com.orsonpdf.PDFDocument");
            Object pdfDoc = pdfDocClass.newInstance();
            Method m = pdfDocClass.getMethod("createPage", Rectangle2D.class);
            Rectangle2D rect = new Rectangle(w, h);
            Object page = m.invoke(pdfDoc, rect);
            Method m2 = page.getClass().getMethod("getGraphics2D");
            Graphics2D g2 = (Graphics2D) m2.invoke(page);
            Rectangle2D drawArea = new Rectangle2D.Double(0, 0, w, h);
            drawable.draw(g2, drawArea);
            Method m3 = pdfDocClass.getMethod("writeToFile", File.class);
            m3.invoke(pdfDoc, file);
        } catch (ClassNotFoundException ex) {
            throw new RuntimeException(ex);
        } catch (InstantiationException ex) {
            throw new RuntimeException(ex);
        } catch (IllegalAccessException ex) {
            throw new RuntimeException(ex);
        } catch (NoSuchMethodException ex) {
            throw new RuntimeException(ex);
        } catch (SecurityException ex) {
            throw new RuntimeException(ex);
        } catch (IllegalArgumentException ex) {
            throw new RuntimeException(ex);
        } catch (InvocationTargetException ex) {
            throw new RuntimeException(ex);
        }
    }
    
    /**
     * Writes the current content to the specified file in PNG format.
     * 
     * @param drawable  the drawable (<code>null</code> not permitted).
     * @param w  the chart width.
     * @param h  the chart height.
     * @param file  the output file (<code>null</code> not permitted).
     * 
     * @throws FileNotFoundException if the file is not found.
     * @throws IOException if there is an I/O problem.
     */
    public static void writeAsPNG(Drawable drawable, int w, int h, 
            File file) throws FileNotFoundException, IOException {
        BufferedImage image = new BufferedImage(w, h, 
                BufferedImage.TYPE_INT_ARGB);
        Graphics2D g2 = image.createGraphics();
        drawable.draw(g2, new Rectangle(w, h));
        OutputStream out = new BufferedOutputStream(new FileOutputStream(file));
        try {
            ImageIO.write(image, "png", out);
        }
        finally {
            out.close();
        }
    }

    /**
     * Writes the current content to the specified file in JPEG format.
     * 
     * @param drawable  the drawable (<code>null</code> not permitted).
     * @param w  the chart width.
     * @param h  the chart height.
     * @param file  the output file (<code>null</code> not permitted).
     * 
     * @throws FileNotFoundException if the file is not found.
     * @throws IOException if there is an I/O problem.
     */
    public static void writeAsJPEG(Drawable drawable, int w, int h, 
            File file) throws FileNotFoundException, IOException {
        BufferedImage image = new BufferedImage(w, h, 
                BufferedImage.TYPE_INT_RGB);
        Graphics2D g2 = image.createGraphics();
        drawable.draw(g2, new Rectangle(w, h));
        OutputStream out = new BufferedOutputStream(new FileOutputStream(file));
        try {
            ImageIO.write(image, "jpg", out);
        }
        finally {
            out.close();
        }
    }
 
}

TestUtils:

/* ===========================================================
 * JFreeChart : a free chart library for the Java(tm) platform
 * ===========================================================
 *
 * (C) Copyright 2000-2014, by Object Refinery Limited and Contributors.
 *
 * Project Info:  http://www.jfree.org/jfreechart/index.html
 *
 * This library is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation; either version 2.1 of the License, or
 * (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
 * License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
 * USA.
 *
 * [Oracle and Java are registered trademarks of Oracle and/or its affiliates. 
 * Other names may be trademarks of their respective owners.]
 *
 * --------------
 * TestUtils.java
 * --------------
 * (C) Copyright 2007-2014, by Object Refinery Limited.
 *
 * Original Author:  David Gilbert (for Object Refinery Limited);
 * Contributor(s):   -;
 *
 * Changes:
 * --------
 * 08-Jun-2007 : Version 1 (DG);
 * 19-Mar-2014 : Renamed TestUtils (DG);
 * 
 */

package org.dgm.test.util;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.ObjectInput;
import java.io.ObjectInputStream;
import java.io.ObjectOutput;
import java.io.ObjectOutputStream;
import java.io.Serializable;
import java.util.Collection;
import java.util.Date;
import java.util.Iterator;

import org.jfree.ui.Drawable;

/**
 * Some utility methods for use by the testing code.
 */
public class TestUtils {

    /**
     * Returns <code>true</code> if the collections contains any object that
     * is an instance of the specified class, and <code>false</code> otherwise.
     *
     * @param collection  the collection.
     * @param c  the class.
     *
     * @return A boolean.
     */
    public static boolean containsInstanceOf(Collection collection, Class c) {
        Iterator iterator = collection.iterator();
        while (iterator.hasNext()) {
            Object obj = iterator.next();
            if (obj != null && obj.getClass().equals(c)) {
                return true;
            }
        }
        return false;
    }

    /**
     * Returns an object that is the deserialised form of the supplied object.
     * The original object is serialised to a byte array then deserialised
     * and returned.
     * 
     * @param original  the original object (<code>null</code> not permitted).
     * 
     * @return A serialised and deserialised object.
     */
    public static <T extends Serializable> T serialised(T original) {
        T result = null;
        ByteArrayOutputStream buffer = new ByteArrayOutputStream();
        ObjectOutput out;
        try {
            out = new ObjectOutputStream(buffer);
            out.writeObject(original);
            out.close();
            ObjectInput in = new ObjectInputStream(
                    new ByteArrayInputStream(buffer.toByteArray()));
            result = (T) in.readObject();
            in.close();
        } catch (IOException e) {
            throw new RuntimeException(e);
        } catch (ClassNotFoundException e) {
            throw new RuntimeException(e);
        }
        return result;
    }
    
    
    /**
     * 導出 到 path
     * @param drawable
     * @param path 如 "d:/abc/cd/"
     */
    public static String export(Drawable drawable,String path){
    	int width = 800;
    	int heigh = 520;
    	Date d = new Date();
    	String filename = path+d.getTime()+".png";
    	try {
			ExportUtils.writeAsPNG(drawable, width, heigh,new File(filename));
		} catch (FileNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
    	return filename;
    	
    }
    

}