package org.springblade.modules.pie;
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import com.alibaba.excel.EasyExcel;
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import com.alibaba.excel.ExcelWriter;
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import com.alibaba.excel.write.metadata.WriteSheet;
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import org.jfree.chart.ChartFactory;
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import org.jfree.chart.ChartUtilities;
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import org.jfree.chart.JFreeChart;
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import org.jfree.chart.labels.StandardPieSectionLabelGenerator;
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import org.jfree.chart.plot.PiePlot;
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import org.jfree.data.general.DefaultPieDataset;
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import org.springframework.web.bind.annotation.RestController;
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import java.awt.*;
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import java.io.ByteArrayInputStream;
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import java.io.ByteArrayOutputStream;
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import java.io.IOException;
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import java.io.InputStream;
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import java.util.ArrayList;
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@RestController
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public class JFreeChartUtil {
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public JFreeChartUtil() {
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}
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public static void main(String[] args) {
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DefaultPieDataset pds = new DefaultPieDataset();
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pds.setValue("00点", 100);
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pds.setValue("04点", 200);
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pds.setValue("08点", 300);
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String filePath = "d:/pie.jpg";
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createPieChart(pds);
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}
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public static void createPieChart(DefaultPieDataset pds) {
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// AnimalHeatService animalHeatService = new AnimalHeatServiceImpl();
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//
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// AnimalHeatVo animalHeatVo = new AnimalHeatVo();
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// animalHeatVo.setStatus(1);
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// animalHeatVo.setBegTime("2021-04-01 00:00:00");
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// animalHeatVo.setEndTime("2021-04-01 00:00:00");
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//
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// List<ReportReturnData> heatExcels = animalHeatService.getAnimalHeatPie(animalHeatVo);
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try {
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// 分别是:显示图表的标题、需要提供对应图表的DateSet对象、是否显示图例、是否生成贴士以及是否生成URL链接
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JFreeChart chart = ChartFactory.createPieChart("体温数据分布图", pds, false, false, true);
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// 如果不使用Font,中文将显示不出来
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Font font = new Font("宋体", Font.BOLD, 24);
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// 设置图片标题的字体
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chart.getTitle().setFont(font);
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// 得到图块,准备设置标签的字体
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PiePlot plot = (PiePlot) chart.getPlot();
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// 设置标签字体
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plot.setLabelFont(font);
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plot.setStartAngle(new Float(3.14f / 2f));
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// 设置plot的前景色透明度
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plot.setForegroundAlpha(0.7f);
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// 设置plot的背景色透明度
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plot.setBackgroundAlpha(0.0f);
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// 设置标签生成器(默认{0})
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// {0}:key {1}:value {2}:百分比 {3}:sum
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plot.setLabelGenerator(new StandardPieSectionLabelGenerator("{0}({1}占{2})"));
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ByteArrayOutputStream bos = new ByteArrayOutputStream();
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ArrayList<ImageData> list = new ArrayList<>();
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ImageData imageData = new ImageData();
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try {
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// 将图表写入到ByteArrayOutputStream流中
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ChartUtilities.writeChartAsJPEG(bos, chart, 800, 700);
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InputStream inputStream = new ByteArrayInputStream(bos.toByteArray());
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String fileName = "imageWrite" + System.currentTimeMillis() + ".xlsx";
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imageData.setInputStream(inputStream);
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list.add(imageData);
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//写入
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ExcelWriter excelWriter = EasyExcel.write(fileName).build();
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WriteSheet writeSheet = EasyExcel.writerSheet(0, "模板0").head(ImageData.class).build();
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excelWriter.write(list, writeSheet);
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// WriteSheet writeSheet0 = EasyExcel.writerSheet(1, "模板1").head(ReportReturnData.class).build();
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// excelWriter.write(heatExcels, writeSheet0);
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excelWriter.finish();
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//EasyExcel.write(fileName, ImageData.class).sheet().doWrite(list);
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//EasyExcel.write(fileName, ImageData.class).sheet().doWrite(list);
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} catch (IOException e) {
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e.printStackTrace();
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}
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// 将内存中的图片写到本地硬盘
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//ChartUtilities.saveChartAsJPEG(new File(filePath), chart, 600, 300);
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} catch (Exception e) {
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e.printStackTrace();
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}finally {
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}
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}
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}
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