课时章节修复一些bug

snowy-plugin/snowy-plugin-disk/snowy-plugin-disk-func/src/main/java/vip/xiaonuo/disk/controller/CourseChapterController.java

@@ -212,7 +212,7 @@ public class CourseChapterController {
         chapterService.addOne(chapter);
         //添加文件，测验等关联信息
         List<CourseRelate> courseRelates = chapterAddParam.getCourseRelates();
-        if(courseRelates.size()>0)
+        if(courseRelates!=null && courseRelates.size()>0)
         {
             courseRelates = courseRelates.stream()
                     .peek(oneCourseRelate -> oneCourseRelate.setChapterhourType("0")) // 修改属性
@@ -239,7 +239,7 @@ public class CourseChapterController {
         chapterService.editOne(chapter);
         //添加文件，测验等关联信息
         List<CourseRelate> courseRelates = chapterEditParam.getCourseRelates();
-        if(courseRelates.size()>0)
+        if(courseRelates!=null && courseRelates.size()>0)
         {
             //先删除过往关联内容
             Map relateParam =new HashMap();

snowy-plugin/snowy-plugin-disk/snowy-plugin-disk-func/src/main/java/vip/xiaonuo/disk/controller/CourseClassHourController.java

@@ -96,7 +96,7 @@ public class CourseClassHourController {
         classHourService.addOne(classHour);
         //添加文件，测验等关联信息
         List<CourseRelate> courseRelates = classHourAddParam.getCourseRelates();
-        if(courseRelates.size()>0)
+        if(courseRelates!=null && courseRelates.size()>0)
         {
             courseRelates = courseRelates.stream()
                     .peek(oneCourseRelate -> oneCourseRelate.setChapterhourType("1")) // 修改属性
@@ -123,7 +123,7 @@ public class CourseClassHourController {
         classHourService.editOne(classHour);
         //重新添加关联内容
         List<CourseRelate> courseRelates = classHourEditParam.getCourseRelates();
-        if(courseRelates.size()>0)
+        if(courseRelates!=null && courseRelates.size()>0)
         {
             //先删除过往关联内容
             Map relateParam =new HashMap();