diff --git a/pom.xml b/pom.xml
index 4f5717c..c37861b 100644
--- a/pom.xml
+++ b/pom.xml
@@ -24,6 +24,17 @@
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-web</artifactId>
         </dependency>
+        <!--neo4j 的引入-->
+        <dependency>
+            <groupId>org.neo4j.driver</groupId>
+            <artifactId>neo4j-java-driver-spring-boot-starter</artifactId>
+            <version>4.3.6.0</version>
+        </dependency>
+        <!-- neo4j 操作实体注解需要 -->
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-data-neo4j</artifactId>
+        </dependency>
         <dependency>
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-aop</artifactId>
diff --git a/src/main/java/com/teaching/backend/controller/know/KnowController.java b/src/main/java/com/teaching/backend/controller/know/KnowController.java
deleted file mode 100644
index 2bb3859..0000000
--- a/src/main/java/com/teaching/backend/controller/know/KnowController.java
+++ /dev/null
@@ -1,40 +0,0 @@
-package com.teaching.backend.controller.know;
-
-import com.teaching.backend.model.dto.know.KnowQueryRequest;
-import com.teaching.backend.model.dto.know.KnowRequest;
-import com.teaching.backend.model.dto.know.KnowupdateRequest;
-import com.teaching.backend.model.entity.know.Know;
-import com.teaching.backend.service.know.KnowService;
-import org.springframework.beans.factory.annotation.Autowired;
-import org.springframework.web.bind.annotation.*;
-
-import java.util.List;
-
-/**
- * @Author:youhang
- * @Date:2024-06-21-10:26
- * @Description:
- */
-@RestController
-@RequestMapping("/api/know")
-public class KnowController {
-
-    @Autowired
-    private KnowService knowService;
-    @PostMapping("/add")
-    public Boolean add(@RequestBody KnowRequest knowAddRequest) {
-     return knowService.add(knowAddRequest);
-    }
-    @PostMapping("/update")
-    public Boolean update(@RequestBody KnowupdateRequest knowAddRequest){
-        return knowService.update(knowAddRequest);
-    }
-    @PostMapping("/delete")
-    public Integer deleteKnow(@RequestBody List<Integer> ids){
-        return knowService.deleteKnow(ids);
-    }
-    @PostMapping("/query")
-    public List<Know> query(@RequestBody KnowQueryRequest knowQueryRequest){
-        return knowService.query(knowQueryRequest);
-    }
-}
diff --git a/src/main/java/com/teaching/backend/controller/know/KnowRelationshipController.java b/src/main/java/com/teaching/backend/controller/know/KnowRelationshipController.java
deleted file mode 100644
index bf7ee78..0000000
--- a/src/main/java/com/teaching/backend/controller/know/KnowRelationshipController.java
+++ /dev/null
@@ -1,42 +0,0 @@
-package com.teaching.backend.controller.know;
-
-
-import com.teaching.backend.common.BaseResponse;
-import com.teaching.backend.common.ResultUtils;
-import com.teaching.backend.model.entity.know.Know;
-import com.teaching.backend.model.entity.know.KnowRelationship;
-import com.teaching.backend.service.know.IKnowRelationshipService;
-import io.swagger.annotations.Api;
-import io.swagger.annotations.ApiOperation;
-import org.springframework.beans.factory.annotation.Autowired;
-import org.springframework.web.bind.annotation.*;
-
-import java.util.List;
-
-/**
- * <p>
- *  前端控制器
- * </p>
- *
- * @author author
- * @since 2024-06-20
- */
-@Api(tags = "知识点章节关系")
-@RestController
-@RequestMapping("/know-relationship")
-public class KnowRelationshipController {
-
-    @Autowired
-    private IKnowRelationshipService knowRelationshipService;
-    @ApiOperation("添加课程知识点关系")
-    @PostMapping()
-    public BaseResponse<Boolean> add(@RequestBody KnowRelationship knowRelationship){
-        boolean save = knowRelationshipService.save(knowRelationship);
-        return ResultUtils.success(save);
-    }
-    @GetMapping()
-    public BaseResponse<List<KnowRelationship>> getAll(){
-        List<KnowRelationship> list = knowRelationshipService.list();
-        return ResultUtils.success(list);
-    }
-}
diff --git a/src/main/java/com/teaching/backend/mapper/know/KnowMapper.java b/src/main/java/com/teaching/backend/mapper/know/KnowMapper.java
deleted file mode 100644
index d6c2237..0000000
--- a/src/main/java/com/teaching/backend/mapper/know/KnowMapper.java
+++ /dev/null
@@ -1,10 +0,0 @@
-package com.teaching.backend.mapper.know;
-
-import com.baomidou.mybatisplus.core.mapper.BaseMapper;
-import com.teaching.backend.model.entity.know.Know;
-import org.apache.ibatis.annotations.Mapper;
-
-@Mapper
-public interface KnowMapper extends BaseMapper<Know> {
-
-}
diff --git a/src/main/java/com/teaching/backend/mapper/know/KnowRelationshipMapper.java b/src/main/java/com/teaching/backend/mapper/know/KnowRelationshipMapper.java
deleted file mode 100644
index 5756236..0000000
--- a/src/main/java/com/teaching/backend/mapper/know/KnowRelationshipMapper.java
+++ /dev/null
@@ -1,18 +0,0 @@
-package com.teaching.backend.mapper.know;
-
-import com.baomidou.mybatisplus.core.mapper.BaseMapper;
-import com.teaching.backend.model.entity.know.KnowRelationship;
-import org.apache.ibatis.annotations.Mapper;
-
-/**
- * <p>
- *  Mapper 接口
- * </p>
- *
- * @author author
- * @since 2024-06-20
- */
-@Mapper
-public interface KnowRelationshipMapper extends BaseMapper<KnowRelationship> {
-
-}
diff --git a/src/main/java/com/teaching/backend/model/dto/know/KnowQueryRequest.java b/src/main/java/com/teaching/backend/model/dto/know/KnowQueryRequest.java
deleted file mode 100644
index fb42742..0000000
--- a/src/main/java/com/teaching/backend/model/dto/know/KnowQueryRequest.java
+++ /dev/null
@@ -1,19 +0,0 @@
-package com.teaching.backend.model.dto.know;
-
-import lombok.Data;
-
-import java.io.Serializable;
-import java.math.BigDecimal;
-
-/**
- * 知识点请求
- */
-@Data
-public class KnowQueryRequest implements Serializable {
-
-    /**
-     * 知识点名称
-     */
-    private String name;
-
-}
diff --git a/src/main/java/com/teaching/backend/model/dto/know/KnowRequest.java b/src/main/java/com/teaching/backend/model/dto/know/KnowRequest.java
deleted file mode 100644
index 2da09bb..0000000
--- a/src/main/java/com/teaching/backend/model/dto/know/KnowRequest.java
+++ /dev/null
@@ -1,48 +0,0 @@
-package com.teaching.backend.model.dto.know;
-
-import lombok.Data;
-
-import java.io.Serializable;
-import java.math.BigDecimal;
-
-/**
- * 知识点请求
- */
-@Data
-public class KnowRequest implements Serializable {
-
-
-    /**
-     * 知识点名称
-     */
-    private String name;
-
-    /**
-     * 简介
-     */
-    private String info;
-
-    /**
-     * 知识点内容
-     */
-    private String content;
-
-    /**
-     * 知识点图片
-     */
-    private String img;
-
-    /**
-     * 知识点学时
-     */
-    private BigDecimal hour;
-
-
-
-    /**
-     * 资源id 运用json
-     */
-    private String resourceid;
-
-
-}
diff --git a/src/main/java/com/teaching/backend/model/dto/know/KnowupdateRequest.java b/src/main/java/com/teaching/backend/model/dto/know/KnowupdateRequest.java
deleted file mode 100644
index bc339ea..0000000
--- a/src/main/java/com/teaching/backend/model/dto/know/KnowupdateRequest.java
+++ /dev/null
@@ -1,54 +0,0 @@
-package com.teaching.backend.model.dto.know;
-
-import lombok.Data;
-
-import java.io.Serializable;
-import java.math.BigDecimal;
-
-/**
- * 知识点请求
- */
-@Data
-public class KnowupdateRequest implements Serializable {
-
-
-    /**
-     * 知识点id
-     */
-    private Integer id;
-
-
-    /**
-     * 知识点名称
-     */
-    private String name;
-
-    /**
-     * 简介
-     */
-    private String info;
-
-    /**
-     * 知识点内容
-     */
-    private String content;
-
-    /**
-     * 知识点图片
-     */
-    private String img;
-
-    /**
-     * 知识点学时
-     */
-    private BigDecimal hour;
-
-
-
-    /**
-     * 资源id 运用json
-     */
-    private String resourceid;
-
-
-}
diff --git a/src/main/java/com/teaching/backend/model/entity/courses/Main.java b/src/main/java/com/teaching/backend/model/entity/courses/Main.java
new file mode 100644
index 0000000..539ef74
--- /dev/null
+++ b/src/main/java/com/teaching/backend/model/entity/courses/Main.java
@@ -0,0 +1,168 @@
+package com.teaching.backend.model.entity.courses;
+
+/**
+ * @Author:youhang
+ * @Date:2024-07-07-21:21
+ * @Description:
+ */
+
+import java.util.Scanner;
+
+class Num {
+    public int Zero = 0;
+
+    public int One = 0;
+
+    public int getZero() {
+        return Zero;
+    }
+
+    public void setZero(int zero) {
+        Zero = zero;
+    }
+
+    public int getOne() {
+        return One;
+    }
+
+    public void setOne(int one) {
+        One = one;
+    }
+}
+
+// 注意类名必须为 Main, 不要有任何 package xxx 信息
+public class Main {
+    public static void main(String[] args) {
+        Scanner in = new Scanner(System.in);
+        int n = in.nextInt();
+        String[] arr = new String[n];
+        int counts = 0;
+        Num num = new Num();
+        for (int i = 0; i < n; i++) {
+            arr[i] = in.next();
+        }
+
+        int p = 1, q = 1;
+        while (p < n) {
+            if (arr[0].charAt(0) == '1') {
+                num.One += 1;
+            } else {
+                num.Zero += 1;
+            }
+            for (int i = 0; i <= p; i++) {
+                if (arr[i].charAt(p) == '1') {
+                    num.One += 1;
+                } else {
+                    num.Zero += 1;
+                }
+                if (arr[p].charAt(i) == '1') {
+                    num.One += 1;
+                } else {
+                    num.Zero += 1;
+                }
+            }
+            if (arr[p].charAt(p) == '1') {
+                num.One -= 1;
+            } else {
+                num.Zero -= 1;
+            }
+            if(num.Zero == num.One){
+                counts++;
+            }
+            num.One = 0;
+            num.Zero = 0;
+
+            if (arr[0].charAt(n-1) == '1') {
+                num.One += 1;
+            } else {
+                num.Zero += 1;
+            }
+            for (int i = 0; i <= p; i++) {
+                if (arr[i].charAt(n-1-p) == '1') {
+                    num.One += 1;
+                } else {
+                    num.Zero += 1;
+                }
+                if (arr[p].charAt(n-i-1) == '1') {
+                    num.One += 1;
+                } else {
+                    num.Zero += 1;
+                }
+            }
+            if (arr[p].charAt(n-p-1) == '1') {
+                num.One -= 1;
+            } else {
+                num.Zero -= 1;
+            }
+            if(num.Zero == num.One){
+                counts++;
+            }
+            //左下
+            num.One = 0;
+            num.Zero = 0;
+
+            if (arr[n-1].charAt(0) == '1') {
+                num.One += 1;
+            } else {
+                num.Zero += 1;
+            }
+            for (int i = 0; i <= p; i++) {
+                if (arr[n-1-i].charAt(p) == '1') {
+                    num.One += 1;
+                } else {
+                    num.Zero += 1;
+                }
+                if (arr[n-p-1].charAt(i) == '1') {
+                    num.One += 1;
+                } else {
+                    num.Zero += 1;
+                }
+            }
+            if (arr[n-p-1].charAt(p) == '1') {
+                num.One -= 1;
+            } else {
+                num.Zero -= 1;
+            }
+            if(num.Zero == num.One){
+                counts++;
+            }
+
+            //右下
+            num.One = 0;
+            num.Zero = 0;
+
+            if (arr[n-1].charAt(n-1) == '1') {
+                num.One += 1;
+            } else {
+                num.Zero += 1;
+            }
+            for (int i = 0; i <= p; i++) {
+                if (arr[n-1-i].charAt(n-p-1) == '1') {
+                    num.One += 1;
+                } else {
+                    num.Zero += 1;
+                }
+                if (arr[n-p-1].charAt(n-1-i) == '1') {
+                    num.One += 1;
+                } else {
+                    num.Zero += 1;
+                }
+            }
+            if (arr[n-p-1].charAt(n-1-p) == '1') {
+                num.One -= 1;
+            } else {
+                num.Zero -= 1;
+            }
+            if(num.Zero == num.One){
+                counts++;
+            }
+
+            p++;
+        }
+
+
+    }
+
+
+}
+
diff --git a/src/main/java/com/teaching/backend/model/entity/know/Know.java b/src/main/java/com/teaching/backend/model/entity/know/Know.java
deleted file mode 100644
index 02199c4..0000000
--- a/src/main/java/com/teaching/backend/model/entity/know/Know.java
+++ /dev/null
@@ -1,66 +0,0 @@
-package com.teaching.backend.model.entity.know;
-
-import com.baomidou.mybatisplus.annotation.IdType;
-import com.baomidou.mybatisplus.annotation.TableId;
-import com.baomidou.mybatisplus.annotation.TableName;
-import io.swagger.annotations.Api;
-import lombok.AllArgsConstructor;
-import lombok.Data;
-import lombok.EqualsAndHashCode;
-import lombok.NoArgsConstructor;
-import lombok.experimental.Accessors;
-
-
-import java.io.Serializable;
-import java.math.BigDecimal;
-import java.time.LocalDateTime;
-
-@Data
-@EqualsAndHashCode(callSuper = false)
-@Accessors(chain = true)
-@TableName("know")
-public class Know implements Serializable {
-
-    private static final long serialVersionUID = 1L;
-
-    /**
-     * id
-     */
-    @TableId(value = "id", type = IdType.AUTO)
-    private Long id;
-
-    /**
-     * 知识点名称
-     */
-    private String name;
-
-    /**
-     * 简介
-     */
-    private String info;
-
-    /**
-     * 知识点内容
-     */
-    private String content;
-
-    /**
-     * 知识点图片
-     */
-    private String img;
-
-    /**
-     * 知识点学时
-     */
-    private BigDecimal hour;
-
-
-
-    /**
-     * 资源id 运用json
-     */
-    private String resourceid;
-
-
-}
-
diff --git a/src/main/java/com/teaching/backend/model/entity/know/KnowRelationship.java b/src/main/java/com/teaching/backend/model/entity/know/KnowRelationship.java
deleted file mode 100644
index 2c073b3..0000000
--- a/src/main/java/com/teaching/backend/model/entity/know/KnowRelationship.java
+++ /dev/null
@@ -1,46 +0,0 @@
-package com.teaching.backend.model.entity.know;
-
-import com.baomidou.mybatisplus.annotation.IdType;
-import com.baomidou.mybatisplus.annotation.TableField;
-import com.baomidou.mybatisplus.annotation.TableId;
-import com.baomidou.mybatisplus.annotation.TableName;
-import io.swagger.annotations.ApiModel;
-import io.swagger.annotations.ApiModelProperty;
-import lombok.Data;
-import lombok.EqualsAndHashCode;
-import lombok.experimental.Accessors;
-
-import java.io.Serializable;
-
-/**
- * <p>
- *
- * </p>
- *
- * @author author
- * @since 2024-06-20
- */
-@Data
-@EqualsAndHashCode(callSuper = false)
-@Accessors(chain = true)
-@TableName("know_relationship")
-@ApiModel(value="KnowRelationship对象", description="")
-public class KnowRelationship implements Serializable {
-
-    private static final long serialVersionUID = 1L;
-
-
-    @ApiModelProperty(value = "章节id")
-    @TableField("chapterId")
-    private String chapterId;
-
-    @ApiModelProperty(value = "课程id")
-    @TableField("courseId")
-    private String courseId;
-
-    @ApiModelProperty(value = "知识点id")
-    @TableField("knowId")
-    private int knowId;
-
-
-}
diff --git a/src/main/java/com/teaching/backend/service/impl/courses/CoursesServiceImpl.java b/src/main/java/com/teaching/backend/service/impl/courses/CoursesServiceImpl.java
index 1efe8c2..a104d6d 100644
--- a/src/main/java/com/teaching/backend/service/impl/courses/CoursesServiceImpl.java
+++ b/src/main/java/com/teaching/backend/service/impl/courses/CoursesServiceImpl.java
@@ -12,7 +12,6 @@ import com.teaching.backend.common.ErrorCode;
 import com.teaching.backend.exception.BusinessException;
 import com.teaching.backend.mapper.chapter.ChapterMapper;
 import com.teaching.backend.mapper.courses.*;
-import com.teaching.backend.mapper.know.KnowRelationshipMapper;
 import com.teaching.backend.mapper.records.LearningRecordsMapper;
 import com.teaching.backend.mapper.umsAdmin.UmsTeacherMapper;
 import com.teaching.backend.mapper.umsAdmin.UmsUserMapper;
@@ -20,7 +19,6 @@ import com.teaching.backend.model.dto.courses.CoursesDTO;
 import com.teaching.backend.model.dto.courses.PageDTO;
 import com.teaching.backend.model.entity.chapter.Chapter;
 import com.teaching.backend.model.entity.courses.*;
-import com.teaching.backend.model.entity.know.KnowRelationship;
 import com.teaching.backend.model.entity.records.LearningRecords;
 import com.teaching.backend.model.entity.umsAdmin.UmsTeacher;
 import com.teaching.backend.model.entity.umsAdmin.UmsUser;
@@ -43,7 +41,6 @@ import java.math.BigDecimal;
 import java.time.LocalDateTime;
 import java.util.*;
 import java.util.stream.Collectors;
-import java.util.stream.Stream;
 
 /**
  * <p>
@@ -65,8 +62,6 @@ public class CoursesServiceImpl extends ServiceImpl<CoursesMapper, Courses> impl
     @Autowired
     CoursesMapper coursesMapper;
 
-    @Autowired
-    KnowRelationshipMapper knowRelationshipMapper;
 
     @Autowired
     CourseObjectivesMapper courseObjectivesMapper;
@@ -307,7 +302,7 @@ public class CoursesServiceImpl extends ServiceImpl<CoursesMapper, Courses> impl
         coursesVO.setTotalHours(countHours(courseid));
         coursesVO.setTotalAssignHours(countChaptersHours(courseid));
         coursesVO.setTotalNotAssignHours(coursesVO.getTotalHours()-coursesVO.getTotalAssignHours());
-        coursesVO.setTotalKnow(countKnow(courseid));
+//        coursesVO.setTotalKnow(countKnow(courseid));
         System.out.println(coursesVO);
         return coursesVO;
     }
@@ -322,20 +317,17 @@ public class CoursesServiceImpl extends ServiceImpl<CoursesMapper, Courses> impl
 
             item.setTotalHours(countHours(item.getId()));
             item.setTotalchapter(countChapters(item.getId()));
-            item.setTotalKnow(countKnow(item.getId()));
+//            item.setTotalKnow(countKnow(item.getId()));
             return item;
         }).collect(Collectors.toList());
         return coursesVo;
 
     }
     //    计算课程知识点个数
-    public int countKnow(String courseid){
-        LambdaQueryWrapper<KnowRelationship> wrapper = new LambdaQueryWrapper<>();
-        wrapper.eq(KnowRelationship::getCourseId,courseid);
-        List<KnowRelationship> list = knowRelationshipMapper.selectList(wrapper);
-        int total=list.size();
-        return total;
-    }
+//    public Integer countKnow(String courseid){
+//        // 已修改 yh
+//        return knowRepository.findCountsByCourseId(courseid);
+//    }
     //    计算课程已分配的学时 计算章的学时（即已包含了小节的学时）
     public int countChaptersHours(String courseid){
         LambdaQueryWrapper<Chapter> wrapper = new LambdaQueryWrapper<>();
diff --git a/src/main/java/com/teaching/backend/service/impl/courses/ObjectiveContentKnowServiceImpl.java b/src/main/java/com/teaching/backend/service/impl/courses/ObjectiveContentKnowServiceImpl.java
index 3f1f99f..f62b99a 100644
--- a/src/main/java/com/teaching/backend/service/impl/courses/ObjectiveContentKnowServiceImpl.java
+++ b/src/main/java/com/teaching/backend/service/impl/courses/ObjectiveContentKnowServiceImpl.java
@@ -9,12 +9,10 @@ import com.teaching.backend.mapper.courses.CourseObjectivesMapper;
 import com.teaching.backend.mapper.courses.CoursesMapper;
 import com.teaching.backend.mapper.courses.ObjectiveContentKnowMapper;
 import com.teaching.backend.mapper.courses.ObjectiveContentsMapper;
-import com.teaching.backend.mapper.know.KnowMapper;
 import com.teaching.backend.model.dto.courses.ObjectiveContentKnowDTO;
 import com.teaching.backend.model.entity.courses.CourseObjectives;
 import com.teaching.backend.model.entity.courses.ObjectiveContentKnow;
 import com.teaching.backend.model.entity.courses.ObjectiveContents;
-import com.teaching.backend.model.entity.know.Know;
 import com.teaching.backend.model.vo.courses.ObjectiveContentKnowVO;
 import com.teaching.backend.service.courses.IObjectiveContentKnowService;
 import org.springframework.beans.factory.annotation.Autowired;
@@ -23,11 +21,9 @@ import org.springframework.transaction.annotation.Transactional;
 
 import java.math.BigDecimal;
 import java.math.RoundingMode;
-import java.sql.SQLIntegrityConstraintViolationException;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.List;
-import java.util.UUID;
 import java.util.stream.Collectors;
 
 /**
@@ -43,8 +39,8 @@ public class ObjectiveContentKnowServiceImpl extends ServiceImpl<ObjectiveConten
 
     @Autowired
     ObjectiveContentKnowMapper objectiveContentKnowMapper;
-    @Autowired
-    KnowMapper knowMapper;
+//    @Autowired
+//    KnowMapper knowMapper;
     @Autowired
     CourseObjectivesMapper courseObjectivesMapper;
     @Autowired
@@ -147,18 +143,18 @@ public class ObjectiveContentKnowServiceImpl extends ServiceImpl<ObjectiveConten
         vo.setKnowsNumber(objectiveContentKnows.size());
 
         // 计算知识点的总时间
-        BigDecimal knowsTime = objectiveContentKnows.stream()
-                .map(contentKnow -> {
-                    Know know = knowMapper.selectOne(new LambdaQueryWrapper<Know>()
-                            .eq(Know::getId, contentKnow.getKnow()));
-                    if (know == null) {
-                        throw new BusinessException(ErrorCode.KNOW_NOT_EXIT);
-                    }
-                    return know.getHour();
-                })
-                .reduce(BigDecimal.ZERO, BigDecimal::add);
-
-        vo.setKnowsTime(knowsTime);
+//        BigDecimal knowsTime = objectiveContentKnows.stream()
+//                .map(contentKnow -> {
+//                    Know know = knowMapper.selectOne(new LambdaQueryWrapper<Know>()
+//                            .eq(Know::getId, contentKnow.getKnow()));
+//                    if (know == null) {
+//                        throw new BusinessException(ErrorCode.KNOW_NOT_EXIT);
+//                    }
+//                    return know.getHour();
+//                })
+//                .reduce(BigDecimal.ZERO, BigDecimal::add);
+
+//        vo.setKnowsTime(knowsTime);
         return vo;
     }
 
diff --git a/src/main/java/com/teaching/backend/service/impl/know/KnowRelationshipServiceImpl.java b/src/main/java/com/teaching/backend/service/impl/know/KnowRelationshipServiceImpl.java
deleted file mode 100644
index 9de0420..0000000
--- a/src/main/java/com/teaching/backend/service/impl/know/KnowRelationshipServiceImpl.java
+++ /dev/null
@@ -1,21 +0,0 @@
-package com.teaching.backend.service.impl.know;
-
-
-import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
-import com.teaching.backend.mapper.know.KnowRelationshipMapper;
-import com.teaching.backend.model.entity.know.KnowRelationship;
-import com.teaching.backend.service.know.IKnowRelationshipService;
-import org.springframework.stereotype.Service;
-
-/**
- * <p>
- *  服务实现类
- * </p>
- *
- * @author author
- * @since 2024-06-20
- */
-@Service
-public class KnowRelationshipServiceImpl extends ServiceImpl<KnowRelationshipMapper, KnowRelationship> implements IKnowRelationshipService {
-
-}
diff --git a/src/main/java/com/teaching/backend/service/impl/know/KnowServiceimpl.java b/src/main/java/com/teaching/backend/service/impl/know/KnowServiceimpl.java
deleted file mode 100644
index f2f924b..0000000
--- a/src/main/java/com/teaching/backend/service/impl/know/KnowServiceimpl.java
+++ /dev/null
@@ -1,50 +0,0 @@
-package com.teaching.backend.service.impl.know;
-
-import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
-import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
-import com.teaching.backend.mapper.know.KnowMapper;
-import com.teaching.backend.model.dto.know.KnowQueryRequest;
-import com.teaching.backend.model.dto.know.KnowRequest;
-import com.teaching.backend.model.dto.know.KnowupdateRequest;
-import com.teaching.backend.model.entity.know.Know;
-import com.teaching.backend.service.know.KnowService;
-import org.springframework.beans.BeanUtils;
-import org.springframework.beans.factory.annotation.Autowired;
-import org.springframework.stereotype.Service;
-
-import java.util.List;
-
-@Service
-public class KnowServiceimpl extends ServiceImpl<KnowMapper,Know> implements KnowService {
-    @Autowired
-    private KnowMapper knowMapper;
-    @Override
-    public Boolean add(KnowRequest knowAddRequest) {
-        Know know = new Know();
-        BeanUtils.copyProperties(knowAddRequest,know);
-        return save(know);
-    }
-
-    @Override
-    public Boolean update(KnowupdateRequest knowAddRequest) {
-        Know know = new Know();
-        BeanUtils.copyProperties(knowAddRequest,know);
-        return (updateById(know));
-    }
-
-    @Override
-    public Integer deleteKnow(List<Integer> ids) {
-         Integer result = knowMapper.deleteBatchIds(ids);
-         return result;
-    }
-
-    @Override
-    public List<Know> query(KnowQueryRequest knowQueryRequest) {
-        String name = knowQueryRequest.getName();
-        QueryWrapper<Know> knowQueryWrapper = new QueryWrapper<>();
-        knowQueryWrapper.eq("name",name);
-        List<Know> knows = knowMapper.selectList(knowQueryWrapper);
-        return knows;
-    }
-
-}
diff --git a/src/main/java/com/teaching/backend/service/impl/records/LearningRecordsServiceImpl.java b/src/main/java/com/teaching/backend/service/impl/records/LearningRecordsServiceImpl.java
index 248feba..562a697 100644
--- a/src/main/java/com/teaching/backend/service/impl/records/LearningRecordsServiceImpl.java
+++ b/src/main/java/com/teaching/backend/service/impl/records/LearningRecordsServiceImpl.java
@@ -14,7 +14,6 @@ import com.teaching.backend.model.vo.records.LearningRecordsVo;
 import com.teaching.backend.service.impl.CourseResourcesServiceImpl;
 import com.teaching.backend.service.impl.chapter.ChapterServiceImpl;
 import com.teaching.backend.service.impl.courses.CoursesServiceImpl;
-import com.teaching.backend.service.impl.know.KnowServiceimpl;
 import com.teaching.backend.service.records.LearningRecordsService;
 import org.springframework.beans.BeanUtils;
 import org.springframework.beans.factory.annotation.Autowired;
@@ -36,8 +35,8 @@ public class LearningRecordsServiceImpl extends ServiceImpl<LearningRecordsMappe
     private LearningRecordsMapper learningRecordsMapper;
     @Autowired
     private CourseResourcesServiceImpl courseResourcesService;
-    @Autowired
-    private KnowServiceimpl knowledgePointService;
+//    @Autowired
+//    private KnowServiceimpl knowledgePointService;
     @Autowired
     private ChapterServiceImpl chapterService;
 
@@ -109,7 +108,7 @@ public class LearningRecordsServiceImpl extends ServiceImpl<LearningRecordsMappe
 //                    }else {
 //                        name = "查无次记录";
 //                    }
-                    learningRecordsVo.setCoursesName(knowledgePointService.getById(learningRecords.getCoursesId()).getName());
+//                    learningRecordsVo.setCoursesName(knowledgePointService.getById(learningRecords.getCoursesId()).getName());
                     //如果对应的资源不存在
                     break;
                 case "2": //如果是章节学习记录
diff --git a/src/main/java/com/teaching/backend/service/know/IKnowRelationshipService.java b/src/main/java/com/teaching/backend/service/know/IKnowRelationshipService.java
deleted file mode 100644
index 861b1d7..0000000
--- a/src/main/java/com/teaching/backend/service/know/IKnowRelationshipService.java
+++ /dev/null
@@ -1,16 +0,0 @@
-package com.teaching.backend.service.know;
-
-
-import com.baomidou.mybatisplus.extension.service.IService;
-import com.teaching.backend.model.entity.know.KnowRelationship;
-
-/**
- * <p>
- *  服务类
- * </p>
- *
- * @author author
- * @since 2024-06-20
- */
-public interface IKnowRelationshipService extends IService<KnowRelationship> {
-}
diff --git a/src/main/java/com/teaching/backend/service/know/KnowService.java b/src/main/java/com/teaching/backend/service/know/KnowService.java
deleted file mode 100644
index c40a743..0000000
--- a/src/main/java/com/teaching/backend/service/know/KnowService.java
+++ /dev/null
@@ -1,23 +0,0 @@
-package com.teaching.backend.service.know;
-
-import com.baomidou.mybatisplus.extension.service.IService;
-import com.teaching.backend.model.dto.favour.knowFavour.KnowFavourAddRequest;
-
-import com.teaching.backend.model.dto.know.KnowQueryRequest;
-import com.teaching.backend.model.dto.know.KnowRequest;
-import com.teaching.backend.model.dto.know.KnowupdateRequest;
-import com.teaching.backend.model.entity.know.Know;
-
-import java.util.List;
-
-
-public interface KnowService extends IService<Know> {
-    public Boolean add(KnowRequest knowAddRequest);
-
-    public Boolean update(KnowupdateRequest knowAddRequest);
-
-    public Integer deleteKnow(List<Integer> ids);
-
-    public List<Know> query(KnowQueryRequest knowQueryRequest);
-}
-
diff --git a/src/main/java/com/teaching/backend/utils/ParamOutAspect.java b/src/main/java/com/teaching/backend/utils/ParamOutAspect.java
index 383ce64..b6b3eee 100644
--- a/src/main/java/com/teaching/backend/utils/ParamOutAspect.java
+++ b/src/main/java/com/teaching/backend/utils/ParamOutAspect.java
@@ -21,6 +21,7 @@
 //
 //import javax.servlet.http.HttpServletRequest;
 //import javax.servlet.http.HttpServletResponse;
+//import java.lang.reflect.Field;
 //import java.lang.reflect.Method;
 //import java.util.Arrays;
 //import java.util.List;
@@ -36,7 +37,7 @@
 //    private final String executeExpr = "execution(public * com.teaching.backend.controller..*.*(..))";
 //
 //    @Before(executeExpr)
-//    public void processLog(JoinPoint joinPoint) {
+//    public void processLog(JoinPoint joinPoint) throws IllegalAccessException {
 //        Method method = ((MethodSignature) joinPoint.getSignature()).getMethod();
 //        //获取方法名称
 //        String methodName = method.getName();
@@ -53,22 +54,25 @@
 //        final Object[] array = filteredArgs.stream().toArray();
 //
 //        for (int i = 0; i < array.length; i++) {
-//            String jsonStr = JSONUtil.toJsonStr(array[i]);
-////            Class<?> myClass = array[i].getClass(); // 获取类的 Class 对象
-//             JSONObject entries = JSONUtil.parseObj(jsonStr);
-//            System.out.println(entries);
-//            // 遍历JSONObject的属性
-//            entries.forEach((key, value) -> {
-//                    if(value == null || "".equals(value)){
-//                        //可以设置为空的字段
-//                        if(key.equals( "sortField")||key.equals( "sortOrder")){
-//                        }else{
-//                            throw new BusinessException(ErrorCode.PARAMS_NULL);
-//                        }
-//
-//                    }
-////                System.out.println(key + ": " + value);
-//            });
+//            Class<?> clazz = array[i].getClass();
+//            // 获取所有字段（包括私有字段）
+//            Field[] fields = clazz.getDeclaredFields();
+//            for (Field field : fields) {
+//                // 设置字段为可访问（如果需要访问私有字段）
+//                field.setAccessible(true);
+//
+//                // 获取字段的值
+//                Object value = field.get(array[i]);
+//
+//                // 检查值是否为空
+//                if (value == null) {
+//                    // 这里可以抛出异常或记录日志，具体取决于你的需求
+//                    String fieldName = field.getName();
+//                    throw new IllegalArgumentException(fieldName + " @@@@@is null");
+//                }
+//            }
+//
+//
 //        }
 //        }
 //    }
diff --git a/src/main/java/com/teaching/backend/utils/getNullPropertyNamesUtil.java b/src/main/java/com/teaching/backend/utils/getNullPropertyNamesUtil.java
new file mode 100644
index 0000000..4131209
--- /dev/null
+++ b/src/main/java/com/teaching/backend/utils/getNullPropertyNamesUtil.java
@@ -0,0 +1,38 @@
+package com.teaching.backend.utils;
+
+import org.springframework.beans.BeanWrapper;
+import org.springframework.beans.BeanWrapperImpl;
+
+import java.math.BigDecimal;
+import java.util.HashSet;
+import java.util.Set;
+
+/**
+ * @Author:youhang
+ * @Date:2024-06-23-12:45
+ * @Description:
+ */
+public  class getNullPropertyNamesUtil {
+
+    public static String[] getNullPropertyNames (Object source) {
+        final BeanWrapper src = new BeanWrapperImpl(source);
+        java.beans.PropertyDescriptor[] pds = src.getPropertyDescriptors();
+
+        Set<String> emptyNames = new HashSet<String>();
+        for(java.beans.PropertyDescriptor pd : pds) {
+            Class<?> propertyType = src.getPropertyType(pd.getName());
+            Object srcValue = src.getPropertyValue(pd.getName());
+//            if ("Integer".equals(propertyType.getName()) || "Long".equals(propertyType.getName())){
+//                Integer value = (Integer) srcValue;
+//                if (value == 0) emptyNames.add(pd.getName());
+//            }
+            if ("BigDecimal".equals(propertyType.getName())){
+                BigDecimal value =(BigDecimal)srcValue;
+                if (value == null || (BigDecimal.ZERO).equals(0)) emptyNames.add(pd.getName());
+            }
+            if (srcValue == null || srcValue == "") emptyNames.add(pd.getName());
+        }
+        String[] result = new String[emptyNames.size()];
+        return emptyNames.toArray(result);
+    }
+}
diff --git a/src/main/resources/application.yml b/src/main/resources/application.yml
index 8dcd1f6..6002750 100644
--- a/src/main/resources/application.yml
+++ b/src/main/resources/application.yml
@@ -7,6 +7,11 @@ spring:
     multipart:
       max-file-size: 10MB
       max-request-size: 10MB
+  neo4j:
+    uri: bolt://39.106.16.162:7687
+    authentication:
+      username: neo4j  # 连接Neo4j数据P库的用户名
+      password: 123456  # 连接Neo4j数据库的密码
   mvc:
     pathmatch:
       matching-strategy: ant_path_matcher