fix

teachcloud-mark/src/main/java/com/qmth/teachcloud/mark/service/impl/MarkStudentServiceImpl.java

@@ -1,5 +1,31 @@
 package com.qmth.teachcloud.mark.service.impl;
 
+import java.awt.*;
+import java.awt.color.ColorSpace;
+import java.awt.image.BufferedImage;
+import java.awt.image.ColorConvertOp;
+import java.io.*;
+import java.math.BigDecimal;
+import java.net.URLEncoder;
+import java.nio.charset.StandardCharsets;
+import java.util.*;
+import java.util.List;
+import java.util.stream.Collectors;
+
+import javax.annotation.Resource;
+import javax.imageio.ImageIO;
+import javax.servlet.ServletOutputStream;
+import javax.servlet.http.HttpServletResponse;
+import javax.validation.constraints.NotNull;
+
+import org.apache.commons.collections4.CollectionUtils;
+import org.apache.commons.io.FilenameUtils;
+import org.apache.commons.lang3.StringUtils;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
+import org.springframework.util.FileCopyUtils;
+
 import com.alibaba.fastjson.JSON;
 import com.alibaba.fastjson.JSONObject;
 import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
@@ -57,31 +83,6 @@ import com.qmth.teachcloud.mark.service.*;
 import com.qmth.teachcloud.mark.utils.BatchGetDataUtil;
 import com.qmth.teachcloud.mark.utils.Calculator;
 import com.qmth.teachcloud.mark.utils.ScoreCalculateUtil;
-import org.apache.commons.collections4.CollectionUtils;
-import org.apache.commons.io.FilenameUtils;
-import org.apache.commons.lang3.StringUtils;
-import org.springframework.beans.factory.annotation.Autowired;
-import org.springframework.stereotype.Service;
-import org.springframework.transaction.annotation.Transactional;
-import org.springframework.util.FileCopyUtils;
-
-import javax.annotation.Resource;
-import javax.imageio.ImageIO;
-import javax.print.attribute.standard.Severity;
-import javax.servlet.ServletOutputStream;
-import javax.servlet.http.HttpServletResponse;
-import javax.validation.constraints.NotNull;
-import java.awt.*;
-import java.awt.color.ColorSpace;
-import java.awt.image.BufferedImage;
-import java.awt.image.ColorConvertOp;
-import java.io.*;
-import java.math.BigDecimal;
-import java.net.URLEncoder;
-import java.nio.charset.StandardCharsets;
-import java.util.List;
-import java.util.*;
-import java.util.stream.Collectors;
 
 /**
  * <p>
@@ -1322,8 +1323,8 @@ public class MarkStudentServiceImpl extends ServiceImpl<MarkStudentMapper, MarkS
 
     private ScoreRangeVo getScoreRangeVo(int totalCount, List<ArchiveStudentVo> list, Double start, Double end) {
         int count = (int) list.stream().filter(s -> s.getTotalScore() >= start && s.getTotalScore() <= end).count();
-        Double rate = null;
-        if (list.size() != 0) {
+        Double rate = 0d;
+        if (list.size() != 0 && totalCount!=0) {
             rate = Calculator.divide(count, totalCount, 2);
         }
         ScoreRangeVo vo = new ScoreRangeVo(count, start, end, rate * 100);