修复成绩查询导出，单科目和全科目明细问题

stmms-web/src/main/java/cn/com/qmth/stmms/admin/exam/ScoreController.java

@@ -210,22 +210,21 @@ public class ScoreController extends BaseExamController {
         String paperType = null;
         try {
             List<ExamStudentDTO> list = new LinkedList<>();
-            for (String subjectCode : subjectSet) {
-                query.setSubjectCode(subjectCode);
-                query.setPageNumber(1);
-                query.setPageSize(Integer.MAX_VALUE);
-                query = studentService.findByQuery(query);
-                for (ExamStudent student : query.getResult()) {
-                    if (student.isBreach() || student.isAbsent()) {
-                        student.setObjectiveScore(0d);
-                        student.setSubjectiveScore(0d);
-                    } else if (paperType == null) {
-                        paperType = student.getPaperType();
-                    }
-                    list.add(new ExamStudentDTO(student));
+            String subjectCodeIn = StringUtils.join(subjectSet, ",");
+            query.setSubjectCodeIn(subjectCodeIn);
+            query.setPageNumber(1);
+            query.setPageSize(Integer.MAX_VALUE);
+            query = studentService.findByQuery(query);
+            for (ExamStudent student : query.getResult()) {
+                if (student.isBreach() || student.isAbsent()) {
+                    student.setObjectiveScore(0d);
+                    student.setSubjectiveScore(0d);
+                } else if (paperType == null) {
+                    paperType = student.getPaperType();
                 }
+                list.add(new ExamStudentDTO(student));
             }
-            if (query.getSubjectCode() != null) {
+            if (StringUtils.isNotBlank(query.getSubjectCode())) {
                 List<String> headerList = getOptionHeader(exam.getId(), query.getSubjectCode(), paperType);
                 ExportStudentExcel excel = new ExportStudentExcel("成绩单", headerList, ExamStudentDTO.class);
                 excel.setDataList(list, true);