1. Toy模板网首页
  2. > Toy博客

java JFreeChart 绘制各种图形 并使用itextPdf生成PDF导出

8月前 作者：万变不离其宗_8 分类：Toy博客 阅读(31) 违法举报

这篇具有很好参考价值的文章主要介绍了java JFreeChart 绘制各种图形 并使用itextPdf生成PDF导出。希望对大家有所帮助。如果存在错误或未考虑完全的地方，请大家不吝赐教，您也可以点击"举报违法"按钮提交疑问。

一、引入maven

<dependency>
    <groupId>com.itextpdf</groupId>
    <artifactId>itextpdf</artifactId>
    <version>5.5.13.3</version>
</dependency>
<dependency>
    <groupId>org.jfree</groupId>
    <artifactId>jfreechart</artifactId>
    <version>1.5.4</version>
</dependency>
<dependency>
    <groupId>commons-io</groupId>
    <artifactId>commons-io</artifactId>
    <version>2.6</version>
</dependency>

二、使用

package com.jiayou.peis.common.core.pdf;

import com.itextpdf.text.Document;
import com.itextpdf.text.Image;
import com.itextpdf.text.PageSize;
import com.itextpdf.text.pdf.PdfWriter;
import org.apache.commons.io.FileUtils;
import org.jfree.chart.ChartUtils;
import org.jfree.data.category.DefaultCategoryDataset;
import org.jfree.data.general.DefaultPieDataset;

import java.io.*;


public class Test {

    public static void main(String[] args) throws IOException {
        PdfWriter writer = null;
        OutputStream outputStream = null;
        Document doc = null;
        try {
            doc = new Document(PageSize.A4);
            doc.setMargins(55, 46, 27, 20);

            File f = new File("C:\\Users\\Administrator\\Desktop\\新建文件夹\\9.pdf");
            if (!f.getParentFile().exists()) {
                FileUtils.forceMkdir(f.getParentFile());
            }
            outputStream = new FileOutputStream(f);
            writer = PdfWriter.getInstance(doc, outputStream);

            doc.open();


            //线图
            ByteArrayOutputStream lineBos = new ByteArrayOutputStream();
            ChartUtils.writeChartAsJPEG(lineBos, ChartUtil.lineChart("线图","r","d",getLineDataset()), 850, 440);
            Image lineImage = Image.getInstance(lineBos.toByteArray());
            lineImage.scalePercent(60);
            doc.add(lineImage);

            //饼图
            ByteArrayOutputStream pieBos = new ByteArrayOutputStream();
            ChartUtils.writeChartAsJPEG(pieBos, ChartUtil.pieChart("饼图",getPieDataset()), 850, 440);
            Image pieImage = Image.getInstance(pieBos.toByteArray());
            pieImage.scalePercent(60);
            doc.add(pieImage);

        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            doc.close();
            writer.close();
            outputStream.close();

        }
    }

    private static DefaultPieDataset getPieDataset() {
        DefaultPieDataset dataset=new DefaultPieDataset();
        dataset.setValue("硕士",1);
        dataset.setValue("专科",2);
        dataset.setValue("本科",3);
        dataset.setValue("高中",3);
        return dataset;
    }

    private static DefaultCategoryDataset getLineDataset() {
        DefaultCategoryDataset dataset = new DefaultCategoryDataset();
        dataset.addValue(15, "schools", "1970");
        dataset.addValue(30, "schools", "1980");
        dataset.addValue(60, "schools", "1990");
        dataset.addValue(120, "schools", "2000");
        dataset.addValue(240, "schools", "2010");
        dataset.addValue(300, "schools", "2020");
        dataset.addValue(320, "schools", "2022");
        return dataset;
    }
}

三、工具类

package com.jiayou.peis.common.core.pdf;

import org.jfree.chart.ChartFactory;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.StandardChartTheme;
import org.jfree.chart.labels.StandardCategoryItemLabelGenerator;
import org.jfree.chart.labels.StandardPieSectionLabelGenerator;
import org.jfree.chart.plot.CategoryPlot;
import org.jfree.chart.plot.PiePlot;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.chart.renderer.category.BarRenderer;
import org.jfree.chart.renderer.category.LineAndShapeRenderer;
import org.jfree.chart.renderer.category.StandardBarPainter;
import org.jfree.data.category.DefaultCategoryDataset;
import org.jfree.data.general.DefaultPieDataset;

import java.awt.*;
import java.text.DecimalFormat;
import java.text.NumberFormat;

public class ChartUtil {
    private static final Color[] BAR_COLORS = new Color[]{new Color(79, 129, 189), new Color(192, 80, 77), new Color(155, 187, 89),};

    public static final Color[] LINE_COLORS = new Color[]{new Color(237, 123, 46), new Color(90, 154, 213), new Color(164, 164, 164),};

    private static final Color[] PIE_COLORS = new Color[]{new Color(75, 172, 198), new Color(128, 100, 162), new Color(155, 187, 89), new Color(192, 80, 77), new Color(79, 129, 189), new Color(44, 77, 117), new Color(247, 150, 70), new Color(165, 165, 165),};


    static StandardChartTheme initChartTheme() {
        StandardChartTheme currentTheme = new StandardChartTheme("JFree");
        // 横轴纵轴标题文字大小
        currentTheme.setLargeFont(new java.awt.Font("宋体", java.awt.Font.BOLD, 15));
        // 横轴纵轴数值文字大小
        currentTheme.setRegularFont(new java.awt.Font("宋体", java.awt.Font.PLAIN, 13));
        currentTheme.setExtraLargeFont(new java.awt.Font("宋体", java.awt.Font.BOLD, 20));
        // 背景颜色
        currentTheme.setPlotBackgroundPaint(new Color(255, 255, 204, 0));
        // 边框线条
        currentTheme.setPlotOutlinePaint(new Color(0, 0, 0, 0));
        // 网格线条
        currentTheme.setRangeGridlinePaint(new Color(78, 74, 74));
        return currentTheme;
    }

    /**
     * 线图
     *
     * @param title             标题
     * @param categoryAxisLabel 分类标签
     * @param valueAxisLabel    数值标签
     * @param dataset           数据集
     * @return org.jfree.chart.JFreeChart
     * @author Hou_fx
     * @date 2021.8.4 10:39
     */
    public static JFreeChart lineChart(String title, String categoryAxisLabel, String valueAxisLabel, DefaultCategoryDataset dataset) {
        ChartFactory.setChartTheme(initChartTheme());

        JFreeChart chart = ChartFactory.createLineChart(title,// 图标题
                categoryAxisLabel,// x轴标题
                valueAxisLabel,// y轴标题
                dataset,//数据集
                PlotOrientation.VERTICAL,//图表方向
                true, true, false);

        CategoryPlot plot = chart.getCategoryPlot();
        LineAndShapeRenderer renderer = (LineAndShapeRenderer) plot.getRenderer();
        // 折现点显示数值
        renderer.setDefaultItemLabelsVisible(true);
        renderer.setDefaultItemLabelGenerator(new StandardCategoryItemLabelGenerator());
        // 更改线条颜色
        for (int i = 0; i < dataset.getRowKeys().size(); i++) {
            renderer.setSeriesPaint(i, LINE_COLORS[i]);
        }
        return chart;
    }


    /**
     * 柱状图
     *
     * @param title
     * @param categoryAxisLabel
     * @param valueAxisLabel
     * @param dataset           数据集
     * @return org.jfree.chart.JFreeChart
     * @author Hou_fx
     * @date 2021.8.4 14:03
     */
    public static JFreeChart barChart(String title, String categoryAxisLabel, String valueAxisLabel, DefaultCategoryDataset dataset) {
        ChartFactory.setChartTheme(initChartTheme());

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

        CategoryPlot plot = chart.getCategoryPlot();
        BarRenderer renderer = (BarRenderer) plot.getRenderer();
        // 纯色显示
        renderer.setBarPainter(new StandardBarPainter());
        // 柱子上显示小数字
        renderer.setDefaultItemLabelsVisible(true);
        renderer.setDefaultItemLabelGenerator(new StandardCategoryItemLabelGenerator());
        // 设置柱子间隔
        renderer.setItemMargin(0.0);
        // 设置柱子颜色
        for (int i = 0; i < dataset.getRowKeys().size(); i++) {
            renderer.setSeriesPaint(i, BAR_COLORS[i]);
        }
        return chart;
    }

    /**
     * 饼图
     *
     * @param title
     * @param dataset
     * @return org.jfree.chart.JFreeChart
     * @author Hou_fx
     * @date 2021.8.4 14:04
     */
    public static JFreeChart pieChart(String title, DefaultPieDataset dataset) {
        ChartFactory.setChartTheme(initChartTheme());

        JFreeChart chart = ChartFactory.createPieChart(title, dataset, true, true, false);
        PiePlot plot = (PiePlot) chart.getPlot();
        // 设置扇区颜色
        for (int i = 0; i < dataset.getKeys().size(); i++) {
            plot.setSectionPaint(dataset.getKey(i), PIE_COLORS[i]);
        }
        // 设置扇区的线条颜色
        plot.setDefaultSectionOutlinePaint(new Color(255, 255, 255));
        // 设置扇区的线条大小
        plot.setDefaultSectionOutlineStroke(new BasicStroke(3));
        // 设置标签颜色
        plot.setLabelLinkPaint(new Color(255, 255, 255, 0));
        // 设置标签背景色
        plot.setLabelBackgroundPaint(new Color(255, 255, 255, 0));
        // 设置标签线条颜色
        plot.setLabelOutlinePaint(new Color(255, 255, 255, 0));
        // 设置标签阴影颜色
        plot.setLabelShadowPaint(new Color(255, 255, 255, 0));
        // 设置饼图阴影颜色
        plot.setShadowPaint(new Color(255, 255, 255, 0));
        // 添加标签数字百分比显示
        plot.setLabelGenerator(new StandardPieSectionLabelGenerator(("{0}{2}"), NumberFormat.getNumberInstance(), new DecimalFormat("0.00%")));
        return chart;
    }
}

参考：
https://blog.csdn.net/hfy1237/article/details/126693786
https://blog.csdn.net/qq_39149275/article/details/119381389文章来源地址https://www.toymoban.com/news/detail-803855.html

到了这里，关于java JFreeChart 绘制各种图形 并使用itextPdf生成PDF导出的文章就介绍完了。如果您还想了解更多内容，请在右上角搜索TOY模板网以前的文章或继续浏览下面的相关文章，希望大家以后多多支持TOY模板网！

本文来自互联网用户投稿，该文观点仅代表作者本人，不代表本站立场。本站仅提供信息存储空间服务，不拥有所有权，不承担相关法律责任。如若转载，请注明出处： 如若内容造成侵权/违法违规/事实不符，请点击违法举报进行投诉反馈，一经查实，立即删除！

分享到：
领支付宝红包 赞助服务器费用

相关文章

觉得文章有用就打赏一下文章作者

支付宝扫一扫打赏

博客赞助

微信扫一扫打赏

请作者喝杯咖啡吧~博客赞助

支付宝扫一扫领取红包，优惠每天领

二维码1

领取红包

二维码2

领红包