diff --git a/servers/boe-server-all/src/main/java/com/xboe/school/study/service/impl/StudyCourseServiceImpl.java b/servers/boe-server-all/src/main/java/com/xboe/school/study/service/impl/StudyCourseServiceImpl.java
index 18992cb8..d4729cd5 100644
--- a/servers/boe-server-all/src/main/java/com/xboe/school/study/service/impl/StudyCourseServiceImpl.java
+++ b/servers/boe-server-all/src/main/java/com/xboe/school/study/service/impl/StudyCourseServiceImpl.java
@@ -397,9 +397,9 @@ public class StudyCourseServiceImpl implements IStudyCourseService{
 		StringBuilder str=new StringBuilder();
 		if(!studyCourseQuery.getIds().isEmpty()){
 			for (String id:studyCourseQuery.getAids()){
-				str.append("'");
+				//str.append("'");
 				str.append(id);
-				str.append("'");
+				//str.append("'");
 				str.append(",");
 
 			}
@@ -411,9 +411,9 @@ public class StudyCourseServiceImpl implements IStudyCourseService{
 		StringBuilder str1=new StringBuilder();
 		if(!studyCourseQuery.getAids().isEmpty()){
 			for (String id:studyCourseQuery.getIds()){
-				str1.append("'");
+				//str1.append("'");
 				str1.append(id);
-				str1.append("'");
+				//str1.append("'");
 				str1.append(",");
 
 			}
@@ -422,8 +422,6 @@ public class StudyCourseServiceImpl implements IStudyCourseService{
 			str1.deleteCharAt(str1.length()-1);
 		}
 
-
-
 		String sql="select sc.id,sc.course_id,sc.course_type,sc.course_name,sc.aid,sc.aname,sc.source,sc.add_time,sc.start_time,sc.finish_time,sc.progress," +
 				"sc.total_duration,sc.last_score,sc.status,sc.status_time,sc.last_time," +
 				"c.score,c.cover_img from boe_course as c left join boe_study_course as sc on sc.course_id=c.id where " +