fix bugs

core-api/src/main/java/cn/com/qmth/examcloud/service/core/service/CourseService.java

@@ -92,6 +92,12 @@ public class CourseService {
 		    if(!StringUtils.isEmpty(courseCriteria.getCode())){
 		    	predicates.add(cb.like(root.get("code"),"%"+courseCriteria.getCode()+"%"));
 		    }
+		    if(!StringUtils.isEmpty(courseCriteria.getLevel())){
+		    	predicates.add(cb.equal(root.get("level"),courseCriteria.getLevel()));
+		    }
+		    if(!StringUtils.isEmpty(courseCriteria.getEnable())){
+		    	predicates.add(cb.equal(root.get("enable"),courseCriteria.getEnable()));
+		    }
 		    return cb.and(predicates.toArray(new Predicate[predicates.size()]));
 		};
 		return specification;