考试报告计算最大值、最小值完善

scommons/src/main/java/com/xhkjedu/utils/N_Utils.java

@@ -25,6 +25,8 @@ import java.util.regex.Pattern;
 import java.util.stream.Collectors;
 import java.util.stream.IntStream;
 
+import static jdk.nashorn.internal.objects.Global.Infinity;
+
 /**
  * @author WN
  * @className N_Utils
@@ -660,13 +662,29 @@ public class N_Utils {
      * @return java.lang.Double
      **/
     public static Double formatDouble(Double num,Integer decimalNum) {
-        if (num == null) num = 0.0;
+        if (num == null || num == Double.NEGATIVE_INFINITY || num == Double.POSITIVE_INFINITY) return 0.0;
         if (isEmptyInteger(decimalNum)) return num;
         BigDecimal bg = new BigDecimal(num);
         double num2 = bg.setScale(decimalNum, BigDecimal.ROUND_DOWN).doubleValue();
         return num2;
     }
 
+    /**
+     * @Description DoubleSummaryStatistics获取最大值有可能为(-Infinity)、最小值有可能为(Infinity);
+     * 检查Double类型的值是否为-Infinity或Infinity，并在是的情况下返回0
+     * @Date 2023/12/28 16:30
+     * @Author YWX
+     * @Param [value]
+     * @Return double
+     **/
+    public static double handleInfinity(double value) {
+        if (value == Double.NEGATIVE_INFINITY || value == Double.POSITIVE_INFINITY) {
+            return 0;
+        } else {
+            return value;
+        }
+    }
+
     /**
      * @Description  格式化double类型，如果未小数点后为0反正整式，
      * @Param [score]

sexam/src/main/java/com/xhkjedu/sexam/service/report/EReportGenerateService.java

@@ -187,10 +187,10 @@ public class EReportGenerateService {
             schoolStudents2 = schoolStudents;
         }
         DoubleSummaryStatistics schoolStatistics = schoolStudents2.stream().filter(s -> s.getScore() > 0).mapToDouble(s -> s.getScore()).summaryStatistics();
-        double schoolStatisticsMax = schoolStatistics.getMax();
+        double schoolStatisticsMax = N_Utils.handleInfinity(schoolStatistics.getMax());
         double schoolStatisticsAverage = N_Utils.formatDouble(schoolStatistics.getAverage(), 2);
         //最低分均不包括0分
-        double schoolStatisticsMin = schoolStudents.stream().filter(s -> s.getScore() > 0).mapToDouble(s -> s.getScore()).summaryStatistics().getMin();
+        double schoolStatisticsMin = N_Utils.handleInfinity(schoolStudents.stream().filter(s -> s.getScore() > 0).mapToDouble(s -> s.getScore()).summaryStatistics().getMin());
         if (N_Utils.isListEmpty(students)) {
             schoolStatisticsMax = 0;
             schoolStatisticsMin = 0;
@@ -404,8 +404,8 @@ public class EReportGenerateService {
         }
 
         DoubleSummaryStatistics statistics = list2.stream().mapToDouble(s -> s.getScore()).summaryStatistics();
-        double maxscore = statistics.getMax();
-        double minscore = list.stream().mapToDouble(s -> s.getScore()).summaryStatistics().getMin();
+        double maxscore = N_Utils.handleInfinity(statistics.getMax());
+        double minscore = N_Utils.handleInfinity(list.stream().mapToDouble(s -> s.getScore()).summaryStatistics().getMin());
         double avgscore = N_Utils.formatDouble(statistics.getAverage(), 2);
         if (N_Utils.isListEmpty(list)) {
             maxscore = 0;
@@ -453,8 +453,8 @@ public class EReportGenerateService {
                 rstudentList2 = list;
             }
             DoubleSummaryStatistics claStatistics = rstudentList2.stream().mapToDouble(s -> s.getScore()).summaryStatistics();
-            double clamaxscore = claStatistics.getMax();
-            double claminscore = rstudentList.stream().mapToDouble(s -> s.getScore()).summaryStatistics().getMin();
+            double clamaxscore = N_Utils.handleInfinity(claStatistics.getMax());
+            double claminscore = N_Utils.handleInfinity(rstudentList.stream().mapToDouble(s -> s.getScore()).summaryStatistics().getMin());
             double claavgscore = N_Utils.formatDouble(claStatistics.getAverage(), 2);
             if (N_Utils.isListEmpty(list)) {
                 clamaxscore = 0;
@@ -1527,6 +1527,7 @@ public class EReportGenerateService {
 
     //获取最高分
     private Double getMaxScore(List<ERstudent> cstudents, Integer linescore) {
+        if(N_Utils.isListEmpty(cstudents)) return 0.0;
         List<Double> cScore = cstudents.stream().map(s -> s.getScore()).distinct().sorted().collect(Collectors.toList());
         int rnum = cScore.size();//排名数量
         if (linescore > rnum) linescore = rnum;