fix

src/main/java/cn/aibreeze/exam/api/H5Controller.java

@@ -22,6 +22,7 @@ import java.io.PrintWriter;
 import java.nio.charset.Charset;
 import java.text.DecimalFormat;
 import java.util.List;
+import java.util.Objects;
 import java.util.stream.Collectors;
 
 @Controller
@@ -82,8 +83,8 @@ public class H5Controller {
         List<ElehSessionQaRecordDo> qaRecordDos = qaRecordMapper.selectList(queryWrapper);
         if(!CollectionUtils.isEmpty(qaRecordDos)) {
 
-            Double totalScore = qaRecordDos.stream().mapToDouble(ElehSessionQaRecordDo::getScore).sum();
-            int examNum = qaRecordDos.size();
+            Double totalScore = qaRecordDos.stream().filter(v -> Objects.nonNull(v.getScore())).mapToDouble(ElehSessionQaRecordDo::getScore).sum();
+            long examNum = qaRecordDos.stream().filter(v -> Objects.nonNull(v.getScore())).count();
             DecimalFormat df = new DecimalFormat("#.##");
             String avgScore = df.format(totalScore / examNum);
 
@@ -107,10 +108,10 @@ public class H5Controller {
 
 
                 out.println("<p><strong>考试题目：</strong>"+knowledgeDo.getQuestion()+"</p>");
-                out.println("<p><strong>你的得分：</strong>"+v.getScore()+"</p>");
+                out.println("<p><strong>你的得分：</strong>"+getOrEmpty(v.getScore())+"</p>");
                 out.println("<p><strong>参考答案：</strong>"+knowledgeDo.getAnswer()+"</p>");
-                out.println("<p><strong>你的答案：</strong>"+v.getAnswer()+"</p>");
-                out.println("<p><strong>得分点评：</strong>"+v.getScoreCriteria()+"</p>");
+                out.println("<p><strong>你的答案：</strong>"+getOrEmpty(v.getAnswer())+"</p>");
+                out.println("<p><strong>得分点评：</strong>"+getOrEmpty(v.getScoreCriteria())+"</p>");
 
                 out.println("<br/>");
             });
@@ -125,4 +126,9 @@ public class H5Controller {
         out.println("</html>");
 
     }
+
+    private String getOrEmpty(Object str) {
+        str = Objects.isNull(str) ? "" : str;
+        return str.toString();
+    }
 }