update

examcloud-core-print-common/src/main/java/cn/com/qmth/examcloud/core/print/common/jpa/Model.java

@@ -36,7 +36,7 @@ public class Model {
         if (fieldName == null) {
             return null;
         }
-        StringBuffer result = new StringBuffer();
+        StringBuilder result = new StringBuilder();
         char[] chars = fieldName.toCharArray();
         final int A = 65, Z = 90, DOT = 46;
         for (int i = 0; i < chars.length; i++) {

examcloud-core-print-common/src/main/java/cn/com/qmth/examcloud/core/print/common/utils/DateUtils.java

@@ -61,7 +61,7 @@ public class DateUtils {
         long hour = (diff / (60 * 60 * 1000) - day * 24);
         long minute = ((diff / (60 * 1000)) - day * 24 * 60 - hour * 60);
         long second = (diff / 1000 - day * 24 * 60 * 60 - hour * 60 * 60 - minute * 60);
-        StringBuffer result = new StringBuffer();
+        StringBuilder result = new StringBuilder();
         if (day > 0) {
             result.append(day).append("天");
         }

examcloud-core-print-service/src/main/java/cn/com/qmth/examcloud/core/print/service/impl/CoursePaperServiceImpl.java

@@ -180,7 +180,7 @@ public class CoursePaperServiceImpl implements CoursePaperService {
         }
 
         //反馈信息
-        StringBuffer errors = new StringBuffer();
+        StringBuilder errors = new StringBuilder();
 
         //获取考试课程下的试卷列表
         List<CoursePaper> coursePapers = this.getCoursePapers(orgId, examId);