diff --git a/.gitignore b/.gitignore
index 3dbf3903..602b0983 100644
--- a/.gitignore
+++ b/.gitignore
@@ -4,7 +4,7 @@
 .LSOverride
 Icon
 ._*
- 
+
 # IDE - IntelliJ IDEA
 .idea/
 *.iml
@@ -12,14 +12,17 @@ Icon
 *.ipr
 out/
 .idea_modules/
- 
+
 # IDE - VSCode
 .vscode/
 *.code-workspace
- 
+
 # Obsidian files
 .obsidian/
- 
+
+# Java build directory
+/target/
+
 # Compiled files
 *.class
 *.jar
@@ -28,18 +31,18 @@ out/
 *.zip
 *.tar.gz
 *.rar
- 
+
 # Logs and databases
 *.log
 *.sqlite
 *.db
- 
+
 # Node
 node_modules/
 npm-debug.log*
 yarn-debug.log*
 yarn-error.log*
- 
+
 # Python
 __pycache__/
 *.py[cod]
@@ -61,8 +64,8 @@ wheels/
 *.egg-info/
 .installed.cfg
 *.egg
- 
+
 # Temporary files
 *.swp
 *.swo
-*~
+*~
\ No newline at end of file
diff --git a/exam-module-exam/exam-module-exam-biz/src/main/java/pc/exam/pp/module/exam/controller/admin/specialty/ExamSpecialtyController.java b/exam-module-exam/exam-module-exam-biz/src/main/java/pc/exam/pp/module/exam/controller/admin/specialty/ExamSpecialtyController.java
index 41f0327d..6d0041eb 100644
--- a/exam-module-exam/exam-module-exam-biz/src/main/java/pc/exam/pp/module/exam/controller/admin/specialty/ExamSpecialtyController.java
+++ b/exam-module-exam/exam-module-exam-biz/src/main/java/pc/exam/pp/module/exam/controller/admin/specialty/ExamSpecialtyController.java
@@ -3,19 +3,16 @@ package pc.exam.pp.module.exam.controller.admin.specialty;
 import io.swagger.v3.oas.annotations.Operation;
 import io.swagger.v3.oas.annotations.Parameter;
 import org.springframework.beans.factory.annotation.Autowired;
-import org.springframework.security.access.prepost.PreAuthorize;
 import org.springframework.web.bind.annotation.*;
 import pc.exam.pp.framework.common.pojo.CommonResult;
-import pc.exam.pp.framework.common.pojo.PageResult;
 import pc.exam.pp.framework.common.util.object.BeanUtils;
 import pc.exam.pp.module.exam.controller.admin.specialty.vo.SpecialtListReqVo;
 import pc.exam.pp.module.exam.controller.admin.specialty.vo.SpecialtyQueryVo;
-import pc.exam.pp.module.exam.dal.dataobject.ExamKnowledgePoints;
-import pc.exam.pp.module.exam.dal.dataobject.ExamSpecialty;
+import pc.exam.pp.module.exam.dal.dataobject.knowledge.ExamKnowledgePoints;
+import pc.exam.pp.module.exam.dal.dataobject.specialty.ExamSpecialty;
 import pc.exam.pp.module.exam.service.knowledge.ExamKnowledgePointsService;
 import pc.exam.pp.module.exam.service.specialty.ExamSpecialtyService;
 
-import java.util.ArrayList;
 import java.util.List;
 import java.util.Objects;
 
diff --git a/exam-module-exam/exam-module-exam-biz/src/main/java/pc/exam/pp/module/exam/dal/dataobject/knowledge/ExamKnowledgePoints.java b/exam-module-exam/exam-module-exam-biz/src/main/java/pc/exam/pp/module/exam/dal/dataobject/knowledge/ExamKnowledgePoints.java
index b552add9..accd6047 100644
--- a/exam-module-exam/exam-module-exam-biz/src/main/java/pc/exam/pp/module/exam/dal/dataobject/knowledge/ExamKnowledgePoints.java
+++ b/exam-module-exam/exam-module-exam-biz/src/main/java/pc/exam/pp/module/exam/dal/dataobject/knowledge/ExamKnowledgePoints.java
@@ -1,12 +1,10 @@
-package pc.exam.pp.module.exam.dal.dataobject;
+package pc.exam.pp.module.exam.dal.dataobject.knowledge;
 
 import com.baomidou.mybatisplus.annotation.IdType;
 import com.baomidou.mybatisplus.annotation.TableId;
 import com.baomidou.mybatisplus.annotation.TableName;
 import lombok.Data;
 import lombok.EqualsAndHashCode;
-import org.apache.commons.lang3.builder.ToStringBuilder;
-import org.apache.commons.lang3.builder.ToStringStyle;
 import pc.exam.pp.framework.tenant.core.db.TenantBaseDO;
 
 /**
diff --git a/exam-module-exam/exam-module-exam-biz/src/main/java/pc/exam/pp/module/exam/dal/dataobject/specialty/ExamSpecialty.java b/exam-module-exam/exam-module-exam-biz/src/main/java/pc/exam/pp/module/exam/dal/dataobject/specialty/ExamSpecialty.java
index 12d643cf..a18ec255 100644
--- a/exam-module-exam/exam-module-exam-biz/src/main/java/pc/exam/pp/module/exam/dal/dataobject/specialty/ExamSpecialty.java
+++ b/exam-module-exam/exam-module-exam-biz/src/main/java/pc/exam/pp/module/exam/dal/dataobject/specialty/ExamSpecialty.java
@@ -1,4 +1,4 @@
-package pc.exam.pp.module.exam.dal.dataobject;
+package pc.exam.pp.module.exam.dal.dataobject.specialty;
 
 import com.baomidou.mybatisplus.annotation.IdType;
 import com.baomidou.mybatisplus.annotation.TableId;
diff --git a/exam-module-exam/exam-module-exam-biz/src/main/java/pc/exam/pp/module/exam/dal/mysql/knowledge/ExamKnowledgePointsMapper.java b/exam-module-exam/exam-module-exam-biz/src/main/java/pc/exam/pp/module/exam/dal/mysql/knowledge/ExamKnowledgePointsMapper.java
index 3430733e..4435f114 100644
--- a/exam-module-exam/exam-module-exam-biz/src/main/java/pc/exam/pp/module/exam/dal/mysql/knowledge/ExamKnowledgePointsMapper.java
+++ b/exam-module-exam/exam-module-exam-biz/src/main/java/pc/exam/pp/module/exam/dal/mysql/knowledge/ExamKnowledgePointsMapper.java
@@ -1,9 +1,9 @@
-package pc.exam.pp.module.exam.dal.mysql;
+package pc.exam.pp.module.exam.dal.mysql.knowledge;
 
 import org.apache.ibatis.annotations.Mapper;
 import org.apache.ibatis.annotations.Param;
 import pc.exam.pp.framework.mybatis.core.mapper.BaseMapperX;
-import pc.exam.pp.module.exam.dal.dataobject.ExamKnowledgePoints;
+import pc.exam.pp.module.exam.dal.dataobject.knowledge.ExamKnowledgePoints;
 
 import java.util.List;
 
diff --git a/exam-module-exam/exam-module-exam-biz/src/main/java/pc/exam/pp/module/exam/dal/mysql/specialty/ExamSpecialtyMapper.java b/exam-module-exam/exam-module-exam-biz/src/main/java/pc/exam/pp/module/exam/dal/mysql/specialty/ExamSpecialtyMapper.java
index 08232182..4c51a00b 100644
--- a/exam-module-exam/exam-module-exam-biz/src/main/java/pc/exam/pp/module/exam/dal/mysql/specialty/ExamSpecialtyMapper.java
+++ b/exam-module-exam/exam-module-exam-biz/src/main/java/pc/exam/pp/module/exam/dal/mysql/specialty/ExamSpecialtyMapper.java
@@ -1,10 +1,9 @@
-package pc.exam.pp.module.exam.dal.mysql;
+package pc.exam.pp.module.exam.dal.mysql.specialty;
 import org.apache.ibatis.annotations.Mapper;
-import org.apache.ibatis.annotations.Param;
 import pc.exam.pp.framework.mybatis.core.mapper.BaseMapperX;
 import pc.exam.pp.module.exam.controller.admin.specialty.vo.SpecialtListReqVo;
 import pc.exam.pp.module.exam.controller.admin.specialty.vo.SpecialtyQueryVo;
-import pc.exam.pp.module.exam.dal.dataobject.ExamSpecialty;
+import pc.exam.pp.module.exam.dal.dataobject.specialty.ExamSpecialty;
 
 import java.util.List;
 
diff --git a/exam-module-exam/exam-module-exam-biz/src/main/java/pc/exam/pp/module/exam/service/knowledge/ExamKnowledgePointsService.java b/exam-module-exam/exam-module-exam-biz/src/main/java/pc/exam/pp/module/exam/service/knowledge/ExamKnowledgePointsService.java
index 747f4fbe..047d98eb 100644
--- a/exam-module-exam/exam-module-exam-biz/src/main/java/pc/exam/pp/module/exam/service/knowledge/ExamKnowledgePointsService.java
+++ b/exam-module-exam/exam-module-exam-biz/src/main/java/pc/exam/pp/module/exam/service/knowledge/ExamKnowledgePointsService.java
@@ -1,6 +1,6 @@
 package pc.exam.pp.module.exam.service.knowledge;
 
-import pc.exam.pp.module.exam.dal.dataobject.ExamKnowledgePoints;
+import pc.exam.pp.module.exam.dal.dataobject.knowledge.ExamKnowledgePoints;
 
 import java.util.List;
 
diff --git a/exam-module-exam/exam-module-exam-biz/src/main/java/pc/exam/pp/module/exam/service/knowledge/ExamKnowledgePointsServiceImpl.java b/exam-module-exam/exam-module-exam-biz/src/main/java/pc/exam/pp/module/exam/service/knowledge/ExamKnowledgePointsServiceImpl.java
index a2e82215..853aa617 100644
--- a/exam-module-exam/exam-module-exam-biz/src/main/java/pc/exam/pp/module/exam/service/knowledge/ExamKnowledgePointsServiceImpl.java
+++ b/exam-module-exam/exam-module-exam-biz/src/main/java/pc/exam/pp/module/exam/service/knowledge/ExamKnowledgePointsServiceImpl.java
@@ -2,10 +2,10 @@ package pc.exam.pp.module.exam.service.knowledge;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;
 import pc.exam.pp.module.exam.controller.admin.specialty.vo.SpecialtListReqVo;
-import pc.exam.pp.module.exam.dal.dataobject.ExamKnowledgePoints;
-import pc.exam.pp.module.exam.dal.dataobject.ExamSpecialty;
-import pc.exam.pp.module.exam.dal.mysql.ExamKnowledgePointsMapper;
-import pc.exam.pp.module.exam.dal.mysql.ExamSpecialtyMapper;
+import pc.exam.pp.module.exam.dal.dataobject.knowledge.ExamKnowledgePoints;
+import pc.exam.pp.module.exam.dal.dataobject.specialty.ExamSpecialty;
+import pc.exam.pp.module.exam.dal.mysql.knowledge.ExamKnowledgePointsMapper;
+import pc.exam.pp.module.exam.dal.mysql.specialty.ExamSpecialtyMapper;
 
 import java.util.List;
 import java.util.Objects;
diff --git a/exam-module-exam/exam-module-exam-biz/src/main/java/pc/exam/pp/module/exam/service/specialty/ExamSpecialtyService.java b/exam-module-exam/exam-module-exam-biz/src/main/java/pc/exam/pp/module/exam/service/specialty/ExamSpecialtyService.java
index 55072f9c..50c564a3 100644
--- a/exam-module-exam/exam-module-exam-biz/src/main/java/pc/exam/pp/module/exam/service/specialty/ExamSpecialtyService.java
+++ b/exam-module-exam/exam-module-exam-biz/src/main/java/pc/exam/pp/module/exam/service/specialty/ExamSpecialtyService.java
@@ -2,7 +2,7 @@ package pc.exam.pp.module.exam.service.specialty;
 
 import pc.exam.pp.module.exam.controller.admin.specialty.vo.SpecialtListReqVo;
 import pc.exam.pp.module.exam.controller.admin.specialty.vo.SpecialtyQueryVo;
-import pc.exam.pp.module.exam.dal.dataobject.ExamSpecialty;
+import pc.exam.pp.module.exam.dal.dataobject.specialty.ExamSpecialty;
 
 import java.util.List;
 
diff --git a/exam-module-exam/exam-module-exam-biz/src/main/java/pc/exam/pp/module/exam/service/specialty/ExamSpecialtyServiceImpl.java b/exam-module-exam/exam-module-exam-biz/src/main/java/pc/exam/pp/module/exam/service/specialty/ExamSpecialtyServiceImpl.java
index e9368f28..87154be1 100644
--- a/exam-module-exam/exam-module-exam-biz/src/main/java/pc/exam/pp/module/exam/service/specialty/ExamSpecialtyServiceImpl.java
+++ b/exam-module-exam/exam-module-exam-biz/src/main/java/pc/exam/pp/module/exam/service/specialty/ExamSpecialtyServiceImpl.java
@@ -6,10 +6,10 @@ import org.springframework.stereotype.Service;
 import pc.exam.pp.framework.common.util.object.BeanUtils;
 import pc.exam.pp.module.exam.controller.admin.specialty.vo.SpecialtListReqVo;
 import pc.exam.pp.module.exam.controller.admin.specialty.vo.SpecialtyQueryVo;
-import pc.exam.pp.module.exam.dal.dataobject.ExamKnowledgePoints;
-import pc.exam.pp.module.exam.dal.dataobject.ExamSpecialty;
-import pc.exam.pp.module.exam.dal.mysql.ExamKnowledgePointsMapper;
-import pc.exam.pp.module.exam.dal.mysql.ExamSpecialtyMapper;
+import pc.exam.pp.module.exam.dal.dataobject.knowledge.ExamKnowledgePoints;
+import pc.exam.pp.module.exam.dal.dataobject.specialty.ExamSpecialty;
+import pc.exam.pp.module.exam.dal.mysql.knowledge.ExamKnowledgePointsMapper;
+import pc.exam.pp.module.exam.dal.mysql.specialty.ExamSpecialtyMapper;
 
 import java.util.List;
 import java.util.Objects;
diff --git a/exam-module-exam/exam-module-exam-biz/src/main/resources/mapper/knowledge/ExamKnowledgePointsMapper.xml b/exam-module-exam/exam-module-exam-biz/src/main/resources/mapper/knowledge/ExamKnowledgePointsMapper.xml
index 26e2bea3..4d22bc93 100644
--- a/exam-module-exam/exam-module-exam-biz/src/main/resources/mapper/knowledge/ExamKnowledgePointsMapper.xml
+++ b/exam-module-exam/exam-module-exam-biz/src/main/resources/mapper/knowledge/ExamKnowledgePointsMapper.xml
@@ -2,7 +2,7 @@
 <!DOCTYPE mapper
 PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
 "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
-<mapper namespace="pc.exam.pp.module.exam.dal.mysql.ExamKnowledgePointsMapper">
+<mapper namespace="pc.exam.pp.module.exam.dal.mysql.knowledge.ExamKnowledgePointsMapper">
 
     <resultMap type="ExamKnowledgePoints" id="KnowledgePointsResult">
         <result property="spId"    column="sp_id"    />
diff --git a/exam-module-exam/exam-module-exam-biz/src/main/resources/mapper/specialty/ExamSpecialtyMapper.xml b/exam-module-exam/exam-module-exam-biz/src/main/resources/mapper/specialty/ExamSpecialtyMapper.xml
index 1128e98c..16b6c467 100644
--- a/exam-module-exam/exam-module-exam-biz/src/main/resources/mapper/specialty/ExamSpecialtyMapper.xml
+++ b/exam-module-exam/exam-module-exam-biz/src/main/resources/mapper/specialty/ExamSpecialtyMapper.xml
@@ -2,7 +2,7 @@
 <!DOCTYPE mapper
 PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
 "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
-<mapper namespace="pc.exam.pp.module.exam.dal.mysql.ExamSpecialtyMapper">
+<mapper namespace="pc.exam.pp.module.exam.dal.mysql.specialty.ExamSpecialtyMapper">
 
     <resultMap type="ExamSpecialty" id="ExamSpecialtyResult">
         <result property="spId"    column="sp_id"    />