使用JFreeChart画柱状图
作者：互联网
/**
* 画图
*
* @param histogramValueVoList
* @return
*/
private ImageEntity generatePicture(List<HistogramValueVo> histogramValueVoList, String pictureTitle, String xName, String yName, String dataName) {
DefaultCategoryDataset dateSet = new DefaultCategoryDataset();
for (HistogramValueVo histogramValueVo : histogramValueVoList) {
dateSet.setValue(histogramValueVo.getValue(), dataName, histogramValueVo.getName());
}
/**
* 标题,目录轴的显示标签,数值的显示标签,数据,图标方向 水平/垂直,是否显示图例，是否生成工具，是否生成URL链接
*/
JFreeChart chart = ChartFactory.createBarChart(pictureTitle, xName, yName, dateSet, PlotOrientation.HORIZONTAL, true, true, false);
//头部字体修改
chart.getTitle().setFont(FontUtils.getFont("simsun.ttf", "新宋体", Font.BOLD, 20f));
//图部分
CategoryPlot categoryPlot = chart.getCategoryPlot();
//背景颜色
categoryPlot.setBackgroundPaint(new Color(241, 241, 245));
//X轴
CategoryAxis domainAxis = categoryPlot.getDomainAxis();
//X轴下标 90°显示
domainAxis.setCategoryLabelPositions(CategoryLabelPositions.STANDARD);
//自动换行 最多显示多少行
domainAxis.setMaximumCategoryLabelLines(100);
//下标
domainAxis.setLabelFont(FontUtils.getFont("simsun.ttf", "黑体", Font.PLAIN, 14f));
//X轴标题
domainAxis.setTickLabelFont(FontUtils.getFont("simsun.ttf", "宋体", Font.PLAIN, 14f));
//Y轴
ValueAxis rangeAxis = categoryPlot.getRangeAxis();
//下标
rangeAxis.setLabelFont(FontUtils.getFont("simsun.ttf", "黑体", Font.PLAIN, 14f));
//Y轴标题
rangeAxis.setTickLabelFont(FontUtils.getFont("simsun.ttf", "宋体", Font.PLAIN, 14f));
NumberAxis numberAxis = (NumberAxis) categoryPlot.getRangeAxis();
//取消自动设置Y轴刻度
numberAxis.setAutoTickUnitSelection(false);
//刻度大小
numberAxis.setTickUnit(new NumberTickUnit(20));
//和下面一行搭配使用 设置Y轴都是正数
numberAxis.setAutoRangeStickyZero(true);
numberAxis.setRangeType(RangeType.POSITIVE);
//设置Y轴上的数值精度
numberAxis.setNumberFormatOverride(new DecimalFormat("0"));
//图标字体
chart.getLegend().setItemFont(FontUtils.getFont("simsun.ttf", "黑体", Font.PLAIN, 14f));
chart.getTitle().setFont(FontUtils.getFont("simsun.ttf", "黑体", Font.PLAIN, 14f));
//图形修改
BarRenderer renderer = (BarRenderer) categoryPlot.getRenderer();
//设置柱状图上的数值精度
renderer.setDefaultItemLabelGenerator(new StandardCategoryItemLabelGenerator("{2}", new DecimalFormat("0.00")));
//设置柱子之间的距离
renderer.setItemMargin(0);
renderer.setPositiveItemLabelPositionFallback(new ItemLabelPosition(ItemLabelAnchor.OUTSIDE12, TextAnchor.BOTTOM_CENTER));
renderer.setDefaultItemLabelFont(FontUtils.getFont("simsun.ttf", "黑体", Font.PLAIN, 14f));
renderer.setDrawBarOutline(false);
//设置柱子宽度
renderer.setMaximumBarWidth(0.1);
//设置柱子高度
renderer.setMinimumBarLength(0.00);
//设置最高柱子离顶部位置
rangeAxis.setUpperMargin(0.18);
//柱状体上的数值显示
renderer.setDefaultItemLabelsVisible(true);
//柱子颜色
renderer.setSeriesPaint(0, new Color(0, 144, 230));
String tempImgPath = this.getClass().getResource("/").getPath() + File.separator + "templates" + File.separator + getCharFileName();
int height = 40 * histogramValueVoList.size();
ImageEntity imageEntity = ChartUtils.creatImag(chart, tempImgPath, 500, height > 200 ? height : 200);
return imageEntity;
}package com.utils;
import com.google.common.collect.Maps;
import java.awt.*;
import java.io.File;
import java.util.Map;
/**
* @author leo.xiong
* @version 2020/6/23
* @className FontUtils
* @Description
*/
public class FontUtils {
private static Map<String, File> nameFileMap = Maps.newHashMap();
private static synchronized void initFontFile(String fileName) {
File file = nameFileMap.get(fileName);
if (file == null) {
String vPath = FontUtils.class.getResource("/").getPath() + File.separator + "bin" + File.separator + fileName;
file = new java.io.File(vPath);
nameFileMap.put(fileName, file);
}
}
/**
* LINUX中文乱码处理
*
* @param fileName
* @param fontName
* @param style
* @param size
* @return
*/
public static Font getFont(String fileName, String fontName, int style, Float size) {
Font defFont = new Font(fontName, style, 12);
try {
initFontFile(fileName);
File file = nameFileMap.get(fileName);
if (file == null || !file.exists()) {
return defFont;
}
java.io.FileInputStream fi = new java.io.FileInputStream(file);
Font nf = Font.createFont(Font.TRUETYPE_FONT, fi);
fi.close();
// 这一句需要注意
// Font.deriveFont() 方法用来创建一个新的字体对象
nf = nf.deriveFont(style, size);
return nf;
} catch (Exception e) {
}
return defFont;
}
}
package com.utils;
import cn.afterturn.easypoi.entity.ImageEntity;
import com.alibaba.dubbo.common.utils.Assert;
import com.alibaba.dubbo.common.utils.StringUtils;
import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartPanel;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.StandardChartTheme;
import org.jfree.chart.axis.NumberAxis;
import org.jfree.chart.axis.ValueAxis;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.chart.plot.XYPlot;
import org.jfree.data.category.DefaultCategoryDataset;
import org.jfree.data.xy.XYSeriesCollection;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.awt.*;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
/**
* @author leo.xiong
* @version 2020/6/18
* @className ChartUtils
* @Description
*/
public class ChartUtils {
private static final Logger LOGGER = LoggerFactory.getLogger(ChartUtils.class);
/**
* 将图片转化为字节数组
*
* @return 字节数组
*/
private static byte[] imgToByte(String tempImgPath) {
File file = new File(tempImgPath);
byte[] buffer = null;
try {
FileInputStream fis = new FileInputStream(file);
ByteArrayOutputStream bos = new ByteArrayOutputStream(1000);
byte[] b = new byte[1000];
int n;
while ((n = fis.read(b)) != -1) {
bos.write(b, 0, n);
}
fis.close();
bos.close();
buffer = bos.toByteArray();
} catch (IOException e) {
e.getMessage();
}
//删除临时文件
file.delete();
return buffer;
}
public static JFreeChart xYLineChart(String title, String xAxisLabel, String yAxisLabel, XYSeriesCollection datas) {
//创建主题样式
StandardChartTheme standardChartTheme = new StandardChartTheme("CN");
//设置标题字体
standardChartTheme.setExtraLargeFont(FontUtils.getFont("simsun.ttf", "新宋体", Font.PLAIN, 18f));
// //设置图例的字体
// standardChartTheme.setRegularFont(FontUtils.getFont(path,"yqyzh.ttf","文泉驿正黑", Font.PLAIN, 12f));
// //设置轴向的字体
// standardChartTheme.setLargeFont(FontUtils.getFont(path,"yqyzh.ttf","文泉驿正黑", Font.PLAIN, 12f));
// standardChartTheme.setSmallFont(FontUtils.getFont(path,"yqyzh.ttf","文泉驿正黑", Font.PLAIN, 10f));
//设置图例的字体
standardChartTheme.setRegularFont(FontUtils.getFont("simhei.ttf", "黑体", Font.PLAIN, 12f));
//设置轴向的字体
standardChartTheme.setLargeFont(FontUtils.getFont("simhei.ttf", "黑体", Font.PLAIN, 12f));
standardChartTheme.setSmallFont(FontUtils.getFont("simhei.ttf", "黑体", Font.PLAIN, 10f));
//设置主题样式
ChartFactory.setChartTheme(standardChartTheme);
//图标标题、数据集合、是否显示图例标识、是否显示tooltips、是否支持超链接
JFreeChart chart = ChartFactory.createXYLineChart(title, xAxisLabel, yAxisLabel, (XYSeriesCollection) datas, PlotOrientation.VERTICAL, true, true, false);
//将jfreechart里RenderingHints做文字渲染参数的修改
chart.getRenderingHints().put(RenderingHints.KEY_TEXT_ANTIALIASING, RenderingHints.VALUE_TEXT_ANTIALIAS_OFF);
ChartPanel chartPanel = new ChartPanel(chart);
chartPanel.setPreferredSize(new java.awt.Dimension(560, 367));
final XYPlot plot = chart.getXYPlot();
// setContentPane( chartPanel ); //原文出自【易百教程】，商业转载请联系作者获得授权，非商业请保留原文链接：https://www.yiibai.com/jfreechart/jfreechart_xy_chart.html
ValueAxis domainAxis = plot.getDomainAxis();
domainAxis.setTickLabelsVisible(true);//X轴的标题文字是否显示
domainAxis.setTickMarksVisible(true);
domainAxis.setAutoRange(true);
// ValueAxis rAxisR = plot.getRangeAxis(1);
// ((Axis) rAxisR).setTickLabelsVisible(true);//Y轴的标题文字是否显示
// ((NumberAxis) rAxisR).setAutoRangeStickyZero(true);
//设置抗锯齿
chart.setTextAntiAlias(false);
// plot.setNoDataMessage("no data");
//设置背景图片颜色
plot.setBackgroundImageAlpha(0.0f);
//设置背景色
plot.setBackgroundPaint(Color.WHITE);
//设置网格横线颜色
plot.setRangeGridlinePaint(Color.black);
//忽略无值的分类
// plot.setIgnoreNullValues(true);
// plot.setBackgroundAlpha(0f);
// //设置标签阴影颜色
// plot.setShadowPaint(new Color(255,255,255));
// //设置标签生成器(默认{0})
// plot.setLabelGenerator(new StandardPieSectionLabelGenerator("{0}({1})/{2}"));
return chart;
}
public static JFreeChart addYLineChart(JFreeChart chart, XYSeriesCollection datas2, String twoyAxisLabel) {
if (StringUtils.isEmpty(twoyAxisLabel)) {
return chart;
}
NumberAxis axis2 = new NumberAxis(twoyAxisLabel);
// axis2.setLabelFont(FontUtils.getFont(path,"yqyzh.ttf","文泉驿正黑", Font.PLAIN, 12f));
axis2.setLabelFont(FontUtils.getFont("simhei.ttf", "黑体", Font.PLAIN, 12f));
// -- 修改第2个Y轴的显示效果
axis2.setAxisLinePaint(Color.BLUE);
axis2.setLabelPaint(Color.BLUE);
axis2.setTickLabelPaint(Color.BLUE);
chart.getXYPlot().setRangeAxis(1, axis2);
chart.getXYPlot().setDataset(1, datas2);
chart.getXYPlot().mapDatasetToRangeAxis(1, 1);
return chart;
}
public static ImageEntity creatImag(JFreeChart chart, String tempImgPath, int width, int height) {
try {
org.jfree.chart.ChartUtils.saveChartAsJPEG(new File(tempImgPath), chart, width, height);
} catch (IOException e1) {
LOGGER.warn("Failed to generate line chart!", e1);
}
ImageEntity imageEntity = new ImageEntity(imgToByte(tempImgPath), width, height);
Assert.notNull(imageEntity.getData(), "Failed to generate line chart!");
return imageEntity;
}
}
标签：FontUtils,getFont,chart,new,柱状图,JFreeChart,使用,import,Font 来源： https://blog.csdn.net/xionglangs/article/details/115749962