diff --git a/src/main/java/com/sztzjy/financial_bigdata/controller/stu/ExerciseExperimentalTraining.java b/src/main/java/com/sztzjy/financial_bigdata/controller/stu/ExerciseExperimentalTraining.java
index 0dbf14d..fc4629a 100644
--- a/src/main/java/com/sztzjy/financial_bigdata/controller/stu/ExerciseExperimentalTraining.java
+++ b/src/main/java/com/sztzjy/financial_bigdata/controller/stu/ExerciseExperimentalTraining.java
@@ -116,6 +116,9 @@ public class ExerciseExperimentalTraining {
         } catch (IOException e) {
             return new ResultEntity<>(HttpStatus.BAD_REQUEST, "资源中心获取内置二级目录失败");
         }
+        if(sysCourseList.isEmpty()){
+            return null;
+        }
 
         List<SysCourseDto> dtoList = new ArrayList<>();
 
@@ -129,6 +132,9 @@ public class ExerciseExperimentalTraining {
         } catch (IOException e) {
             return new ResultEntity<>(HttpStatus.BAD_REQUEST, "资源中心根据课程IDList查询章节集合失败");
         }
+        if(sysCourseChapters.isEmpty()){
+            return null;
+        }
 
         // 批量查询所有案例题步骤
         SysCaseQuestionStepExample stepExample = new SysCaseQuestionStepExample();
@@ -140,7 +146,6 @@ public class ExerciseExperimentalTraining {
             e.printStackTrace();
         }
 
-
         Map<String, List<TestTestSysCaseQuestionStepWithBLOBs>> caseStepsMap = sysCaseQuestionSteps.stream()
                 .collect(Collectors.groupingBy(TestTestSysCaseQuestionStepWithBLOBs::getCaseId));
 
diff --git a/src/main/java/com/sztzjy/financial_bigdata/controller/stu/StuKnowledgeNote.java b/src/main/java/com/sztzjy/financial_bigdata/controller/stu/StuKnowledgeNote.java
index 701e204..36adcb0 100644
--- a/src/main/java/com/sztzjy/financial_bigdata/controller/stu/StuKnowledgeNote.java
+++ b/src/main/java/com/sztzjy/financial_bigdata/controller/stu/StuKnowledgeNote.java
@@ -5,10 +5,12 @@ import com.sztzjy.financial_bigdata.annotation.AnonymousAccess;
 import com.sztzjy.financial_bigdata.entity.StuTrainingExample;
 import com.sztzjy.financial_bigdata.entity.StuTrainingWithBLOBs;
 import com.sztzjy.financial_bigdata.entity.SysKnowledgeSummary;
+import com.sztzjy.financial_bigdata.entity.SysObjectiveQuestionExample;
 import com.sztzjy.financial_bigdata.entity.resource_entity.TestSysKnowledgeSummary;
 import com.sztzjy.financial_bigdata.entity.stu_dto.ReceivingObject;
 import com.sztzjy.financial_bigdata.mapper.StuTrainingMapper;
 import com.sztzjy.financial_bigdata.mapper.SysKnowledgeSummaryMapper;
+import com.sztzjy.financial_bigdata.mapper.SysObjectiveQuestionMapper;
 import com.sztzjy.financial_bigdata.resourceCenterAPI.KnowledgeSummaryApi;
 import com.sztzjy.financial_bigdata.util.PdfUtil;
 import com.sztzjy.financial_bigdata.util.ResultEntity;
diff --git a/src/main/java/com/sztzjy/financial_bigdata/resourceCenterAPI/CaseApi.java b/src/main/java/com/sztzjy/financial_bigdata/resourceCenterAPI/CaseApi.java
index f7ada2d..e8734da 100644
--- a/src/main/java/com/sztzjy/financial_bigdata/resourceCenterAPI/CaseApi.java
+++ b/src/main/java/com/sztzjy/financial_bigdata/resourceCenterAPI/CaseApi.java
@@ -345,6 +345,9 @@ public class CaseApi {
         JSONObject object = HttpUtils.sendPost(
                 selectAllStepBySystemOwner,
                 requestBody);
+        if(object==null){
+            return null;
+        }
         Gson gson = new GsonBuilder()
                 .registerTypeAdapter(Date.class, new DateTypeAdapter())
                 .create();
diff --git a/src/main/java/com/sztzjy/financial_bigdata/resourceCenterAPI/CourseAPI.java b/src/main/java/com/sztzjy/financial_bigdata/resourceCenterAPI/CourseAPI.java
index c6b45e6..b5618b7 100644
--- a/src/main/java/com/sztzjy/financial_bigdata/resourceCenterAPI/CourseAPI.java
+++ b/src/main/java/com/sztzjy/financial_bigdata/resourceCenterAPI/CourseAPI.java
@@ -169,6 +169,9 @@ public class CourseAPI {
         JSONObject object = HttpUtils.sendPost(
                 urlWithParams,
                 gson.toJson(courseIds), "application/json", null);
+        if(object==null){
+            return null;
+        }
         Type listType = new TypeToken<List<SysThreeCatalog>>() {
         }.getType();
         List<SysThreeCatalog> list = gson.fromJson(object.get("respString").toString(), listType);
diff --git a/src/main/java/com/sztzjy/financial_bigdata/resourceCenterAPI/ObjectiveApi.java b/src/main/java/com/sztzjy/financial_bigdata/resourceCenterAPI/ObjectiveApi.java
index 50c512a..ab49955 100644
--- a/src/main/java/com/sztzjy/financial_bigdata/resourceCenterAPI/ObjectiveApi.java
+++ b/src/main/java/com/sztzjy/financial_bigdata/resourceCenterAPI/ObjectiveApi.java
@@ -327,6 +327,9 @@ public class ObjectiveApi {
         JSONObject object = HttpUtils.sendPost(
                 selectCountSingle,
                 requestBody);
+        if(object==null){
+            return 0;
+        }
         String respString = object.get("respString").toString();
         return Integer.valueOf(respString);
 
@@ -339,6 +342,9 @@ public class ObjectiveApi {
         JSONObject object = HttpUtils.sendPost(
                 selectCountMany,
                 requestBody);
+        if(object==null){
+            return 0;
+        }
         String respString = object.get("respString").toString();
         return Integer.valueOf(respString);
 
@@ -351,6 +357,9 @@ public class ObjectiveApi {
         JSONObject object = HttpUtils.sendPost(
                 selectCountJudge,
                 requestBody);
+        if(object==null){
+            return 0;
+        }
         String respString = object.get("respString").toString();
         return Integer.valueOf(respString);
 
diff --git a/src/main/java/com/sztzjy/financial_bigdata/service/tea/ITeaCaseStepService.java b/src/main/java/com/sztzjy/financial_bigdata/service/tea/ITeaCaseStepService.java
index c80eab0..4175c92 100644
--- a/src/main/java/com/sztzjy/financial_bigdata/service/tea/ITeaCaseStepService.java
+++ b/src/main/java/com/sztzjy/financial_bigdata/service/tea/ITeaCaseStepService.java
@@ -1,6 +1,7 @@
 package com.sztzjy.financial_bigdata.service.tea;
 
 import com.sztzjy.financial_bigdata.entity.SysCaseQuestionStep;
+import com.sztzjy.financial_bigdata.entity.resource_entity.TestTestSysCaseQuestionStepWithBLOBs;
 import com.sztzjy.financial_bigdata.entity.stu_dto.StuCommitCaseDto;
 
 import java.io.IOException;
@@ -15,7 +16,7 @@ public interface ITeaCaseStepService {
 
     Boolean deleteCaseStep(String caseStepId, String schoolId);
 
-    SysCaseQuestionStep selectCaseStepDetails(String caseStepId);
+    TestTestSysCaseQuestionStepWithBLOBs selectCaseStepDetails(String caseStepId) throws IOException;
 
     Boolean commitCase(StuCommitCaseDto commitCaseDto) throws IOException;
 }
diff --git a/src/main/java/com/sztzjy/financial_bigdata/service/tea/impl/TeaCaseStepServiceImpl.java b/src/main/java/com/sztzjy/financial_bigdata/service/tea/impl/TeaCaseStepServiceImpl.java
index a6c71b5..bdef376 100644
--- a/src/main/java/com/sztzjy/financial_bigdata/service/tea/impl/TeaCaseStepServiceImpl.java
+++ b/src/main/java/com/sztzjy/financial_bigdata/service/tea/impl/TeaCaseStepServiceImpl.java
@@ -82,9 +82,9 @@ public class TeaCaseStepServiceImpl implements ITeaCaseStepService {
     }
 
     @Override
-    public SysCaseQuestionStep selectCaseStepDetails(String caseStepId) {
-        SysCaseQuestionStep sysCaseQuestionStep = caseQuestionStepMapper.selectByPrimaryKey(caseStepId);
-        return sysCaseQuestionStep;
+    public TestTestSysCaseQuestionStepWithBLOBs selectCaseStepDetails(String caseStepId) throws IOException {
+        TestTestSysCaseQuestionStepWithBLOBs testTestSysCaseQuestionStepWithBLOBs = CaseApi.selectCaseStepDetails(caseStepId);
+        return testTestSysCaseQuestionStepWithBLOBs;
     }
 
     @Override
@@ -93,8 +93,8 @@ public class TeaCaseStepServiceImpl implements ITeaCaseStepService {
         StuTrainingStepRecordExample example = new StuTrainingStepRecordExample();
         example.createCriteria().andUserIdEqualTo(commitCaseDto.getUserId()).andCaseStepIdEqualTo(commitCaseDto.getCaseStepId());
         List<StuTrainingStepRecord> stuTrainingStepRecords = trainingStepRecordMapper.selectByExample(example);
-        if(stuTrainingStepRecords==null){  //未答过该步骤题目 新增数据到stepRecord表中
-            SysCaseQuestionStep dbCaseQuestionStep = selectCaseStepDetails(commitCaseDto.getCaseStepId());
+        if(stuTrainingStepRecords.isEmpty()){  //未答过该步骤题目 新增数据到stepRecord表中
+            TestTestSysCaseQuestionStepWithBLOBs dbCaseQuestionStep = selectCaseStepDetails(commitCaseDto.getCaseStepId());
             StuTrainingStepRecord stepRecord = new StuTrainingStepRecord();
             stepRecord.setRecordId(String.valueOf(UUID.randomUUID()));
             stepRecord.setUserId(commitCaseDto.getUserId());
@@ -128,7 +128,7 @@ public class TeaCaseStepServiceImpl implements ITeaCaseStepService {
                 stepRecord.setScore("0");
                 //再修改学生实训表中的部分参数  先获取学生实训表中的数据
                 StuTrainingWithBLOBs training = trainingMapper.selectByPrimaryKey(commitCaseDto.getStuTrainingId());
-                //如果案例题学生的实验实训完成情况=0 则实训进度+1否则 实训进度不加 并累加案例题学生得分 修改实验实训完成状态
+                //如果案例题学生的实验实训完成情况=0 则实训进度+1否则 实训进度不加 修改实验实训完成状态
                 if(training.getExpTrainingCompleteStatus()==null){
                     if(training.getProgress()==null){
                         training.setProgress(BigDecimal.ONE);
@@ -139,8 +139,6 @@ public class TeaCaseStepServiceImpl implements ITeaCaseStepService {
                 }
                 if(training.getCaseStuScore()==null){
                     training.setCaseStuScore(sysCaseQuestionStep.getScore());
-                }else {
-                    training.setCaseStuScore(training.getCaseStuScore().add(sysCaseQuestionStep.getScore()));
                 }
                 trainingMapper.updateByPrimaryKeyWithBLOBs(training);
             }