fix: 添加字体文件，用代码让JChartFree用上simsun字体

src/main/java/cn/teammodel/TeamModelExtensionApplication.java

@@ -10,6 +10,4 @@ public class TeamModelExtensionApplication {
         SpringApplication.run(TeamModelExtensionApplication.class, args);
     }
 
-    
-
 }

src/main/java/cn/teammodel/service/impl/EvaluationServiceImpl.java

@@ -31,7 +31,6 @@ import org.apache.commons.lang3.ObjectUtils;
 import org.apache.commons.lang3.StringUtils;
 import org.jfree.chart.ChartUtils;
 import org.jfree.chart.JFreeChart;
-import org.jfree.chart.plot.PiePlot;
 import org.jfree.data.general.DefaultPieDataset;
 import org.springframework.core.io.ClassPathResource;
 import org.springframework.data.domain.Page;
@@ -41,14 +40,12 @@ import org.springframework.stereotype.Service;
 import javax.annotation.Resource;
 import javax.servlet.ServletOutputStream;
 import javax.servlet.http.HttpServletResponse;
-import java.awt.*;
 import java.io.ByteArrayOutputStream;
 import java.io.IOException;
 import java.io.InputStream;
 import java.time.Instant;
 import java.time.LocalDate;
 import java.util.*;
-import java.util.List;
 import java.util.stream.Collectors;
 
 /**
@@ -659,10 +656,6 @@ public class EvaluationServiceImpl implements EvaluationService {
         praiseDistributionDataset.setValue(FiveEducations.ART.getName(), reportVo.getPraiseDistribution().get(FiveEducations.ART.getCode()));
         praiseDistributionDataset.setValue(FiveEducations.LABOUR.getName(), reportVo.getPraiseDistribution().get(FiveEducations.LABOUR.getCode()));
         JFreeChart praisePieChart = ChartUtil.pieChart("五育表扬指标分布", praiseDistributionDataset);
-        PiePlot plot1 = (PiePlot) praisePieChart.getPlot();
-        plot1.setNoDataMessage("无数据");
-        plot1.setNoDataMessageFont(new Font("宋体", Font.PLAIN, 18));
-
         ByteArrayOutputStream praiseBos = new ByteArrayOutputStream();
         ChartUtils.writeChartAsJPEG(praiseBos, praisePieChart, 340, 330);
 
@@ -674,11 +667,6 @@ public class EvaluationServiceImpl implements EvaluationService {
         criticalDistributionDataset.setValue(FiveEducations.ART.getName(), reportVo.getCriticalDistribution().get(FiveEducations.ART.getCode()));
         criticalDistributionDataset.setValue(FiveEducations.LABOUR.getName(), reportVo.getCriticalDistribution().get(FiveEducations.LABOUR.getCode()));
         JFreeChart criticalPieChart = ChartUtil.pieChart("五育待改进指标分布", criticalDistributionDataset);
-
-        PiePlot plot2 = (PiePlot) criticalPieChart.getPlot();
-        plot2.setNoDataMessage("无数据");
-        plot2.setNoDataMessageFont(new Font("宋体", Font.PLAIN, 18));
-
         ByteArrayOutputStream criticalBos = new ByteArrayOutputStream();
         ChartUtils.writeChartAsJPEG(criticalBos, criticalPieChart, 340, 330);
 

src/main/java/cn/teammodel/utils/ChartUtil.java

@@ -15,8 +15,10 @@ import org.jfree.data.category.DefaultCategoryDataset;
 import org.jfree.data.general.DefaultPieDataset;
 
 import java.awt.*;
+import java.io.InputStream;
 import java.text.DecimalFormat;
 import java.text.NumberFormat;
+import java.util.Objects;
 
 /**
  * 生成图表工具类
@@ -47,14 +49,31 @@ public class ChartUtil {
             new Color(165, 165, 165),
     };
 
+    public static Font loadFontFromFile() {
+        try {
+            String fontFilePath = "/fonts/simsun.ttf";
+            // 创建 TrueTypeFont 对象，从指定文件路径加载字体
+            InputStream fontInputStream = ChartUtil.class.getResourceAsStream(fontFilePath);
+            assert fontInputStream != null;
+            return Font.createFont(Font.TRUETYPE_FONT, fontInputStream).deriveFont(Font.BOLD, 14);
+        } catch (Exception e) {
+            e.printStackTrace();
+            // 处理异常情况，例如文件不存在或加载失败
+            return null;
+        }
+    }
 
     private static StandardChartTheme initChartTheme(){
+
+        // 加载字体文件
+        Font customFont = loadFontFromFile();
         StandardChartTheme currentTheme = new StandardChartTheme("JFree");
         // 横轴纵轴标题文字大小
-        currentTheme.setLargeFont(new Font("宋体", Font.BOLD, 15));
+        assert customFont != null;
+        currentTheme.setLargeFont(customFont);
         // 横轴纵轴数值文字大小
-        currentTheme.setRegularFont(new Font("宋体", Font.PLAIN, 13));
+        currentTheme.setRegularFont(customFont);
-        currentTheme.setExtraLargeFont(new Font("宋体", Font.BOLD, 20));
+        currentTheme.setExtraLargeFont(customFont);
         // 背景颜色
         currentTheme.setPlotBackgroundPaint(new Color(255, 255, 204, 0));
         // 边框线条
@@ -175,6 +194,8 @@ public class ChartUtil {
         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%")));
+        plot.setNoDataMessage("无数据");
+        plot.setNoDataMessageFont(Objects.requireNonNull(ChartUtil.loadFontFromFile()).deriveFont(Font.BOLD, 18));
         return chart;
     }
 }