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@@ -27,6 +27,7 @@ import org.springframework.stereotype.Service;
 import java.rmi.ServerException;
 import java.util.List;
 import java.util.Map;
+import java.util.Objects;
 import java.util.Set;
 
 /**
@@ -136,47 +137,67 @@ public class CourseServiceImpl implements ICourseService {
         for (CourseVo vo : list) {
             if(StrUtil.isNotBlank(vo.getTwoDimensionalOssId())){
                 SysOssVo oss = iSysOssService.getById(Long.valueOf(vo.getTwoDimensionalOssId()));
-                vo.setTwoDimensionalOssUrl(oss.getUrl());
+                if(Objects.nonNull(oss)) {
+                    vo.setTwoDimensionalOssUrl(oss.getUrl());
+                }
             }
             if(StrUtil.isNotBlank(vo.getTwoDimensionalUrl())){
                 SysOssVo oss = iSysOssService.getById(Long.valueOf(vo.getTwoDimensionalUrl()));
-                vo.setTwoDimensionalUrl(oss.getUrl());
+                if(Objects.nonNull(oss)) {
+                    vo.setTwoDimensionalUrl(oss.getUrl());
+                }
             }
             if(StrUtil.isNotBlank(vo.getTwoDimensionalType())){
                 SysOssVo oss = iSysOssService.getById(Long.valueOf(vo.getTwoDimensionalType()));
-                vo.setTwoDimensionalType(oss.getUrl());
+                if(Objects.nonNull(oss)) {
+                    vo.setTwoDimensionalType(oss.getUrl());
+                }
             }
             if(StrUtil.isNotBlank(vo.getThreeDimensionalOssId())){
                 SysOssVo oss = iSysOssService.getById(Long.valueOf(vo.getThreeDimensionalOssId()));
-                vo.setThreeDimensionalOssUrl(oss.getUrl());
+                if(Objects.nonNull(oss)) {
+                    vo.setThreeDimensionalOssUrl(oss.getUrl());
+                }
             }
             if(StrUtil.isNotBlank(vo.getThreeDimensionalUrl())){
                 SysOssVo oss = iSysOssService.getById(Long.valueOf(vo.getThreeDimensionalUrl()));
-                vo.setThreeDimensionalUrl(oss.getUrl());
+                if(Objects.nonNull(oss)) {
+                    vo.setThreeDimensionalUrl(oss.getUrl());
+                }
             }
             if(StrUtil.isNotBlank(vo.getThreeDimensionalType())){
                 SysOssVo oss = iSysOssService.getById(Long.valueOf(vo.getThreeDimensionalType()));
-                vo.setThreeDimensionalType(oss.getUrl());
+                if(Objects.nonNull(oss)) {
+                    vo.setThreeDimensionalType(oss.getUrl());
+                }
             }
             if(StrUtil.isNotBlank(vo.getCaseOssId())){
                 SysOssVo oss = iSysOssService.getById(Long.valueOf(vo.getCaseOssId()));
-                vo.setCaseOssUrl(oss.getUrl());
-                vo.setCaseFileVoList(ossUrlService.selectFileVoByIds(vo.getCaseOssId()));
+                if(Objects.nonNull(oss)) {
+                    vo.setCaseOssUrl(oss.getUrl());
+                    vo.setCaseFileVoList(ossUrlService.selectFileVoByIds(vo.getCaseOssId()));
+                }
             }
             if(StrUtil.isNotBlank(vo.getTeachingOssId())){
                 SysOssVo oss = iSysOssService.getById(Long.valueOf(vo.getTeachingOssId()));
-                vo.setTeachingOssUrl(oss.getUrl());
-                vo.setTeachingFileVoList(ossUrlService.selectFileVoByIds(vo.getTeachingOssId()));
+                if(Objects.nonNull(oss)) {
+                    vo.setTeachingOssUrl(oss.getUrl());
+                    vo.setTeachingFileVoList(ossUrlService.selectFileVoByIds(vo.getTeachingOssId()));
+                }
             }
             if(StrUtil.isNotBlank(vo.getPptOssId())){
                 SysOssVo oss = iSysOssService.getById(Long.valueOf(vo.getPptOssId()));
-                vo.setPptOssUrl(oss.getUrl());
-                vo.setPptFileVoList(ossUrlService.selectFileVoByIds(vo.getPptOssId()));
+                if(Objects.nonNull(oss)) {
+                    vo.setPptOssUrl(oss.getUrl());
+                    vo.setPptFileVoList(ossUrlService.selectFileVoByIds(vo.getPptOssId()));
+                }
             }
 
             if(StrUtil.isNotBlank(vo.getOssId())){
                 SysOssVo oss = iSysOssService.getById(Long.valueOf(vo.getOssId()));
-                vo.setOssUrl(oss.getUrl());
+                if(Objects.nonNull(oss)) {
+                    vo.setOssUrl(oss.getUrl());
+                }
             }
         }
         return list;