Merge branch 'dev' of http://39.101.133.168:8807/donghanyang/Dbqb_Study into dev

2 weeks ago · 871eb4794a
8 changed files with 471 additions and 0 deletions
--- a/.idea/shelf/在变基之前未提交的更改_[更改]2/shelved.patch
+++ b/.idea/shelf/在变基之前未提交的更改_[更改]2/shelved.patch
@ -0,0 +1,92 @@
+Index: .idea/workspace.xml
+IDEA additional info:
+Subsystem: com.intellij.openapi.diff.impl.patch.BaseRevisionTextPatchEP
+<+><?xml version=\"1.0\" encoding=\"UTF-8\"?>\r\n<project version=\"4\">\r\n  <component name=\"AutoImportSettings\">\r\n    <option name=\"autoReloadType\" value=\"SELECTIVE\" />\r\n  </component>\r\n  <component name=\"ChangeListManager\">\r\n    <list default=\"true\" id=\"1250a154-aa13-4278-9e87-904a86c4dbd2\" name=\"更改\" comment=\"11.5\">\r\n      <change beforePath=\"$PROJECT_DIR$/.idea/workspace.xml\" beforeDir=\"false\" afterPath=\"$PROJECT_DIR$/.idea/workspace.xml\" afterDir=\"false\" />\r\n    </list>\r\n    <option name=\"SHOW_DIALOG\" value=\"false\" />\r\n    <option name=\"HIGHLIGHT_CONFLICTS\" value=\"true\" />\r\n    <option name=\"HIGHLIGHT_NON_ACTIVE_CHANGELIST\" value=\"false\" />\r\n    <option name=\"LAST_RESOLUTION\" value=\"IGNORE\" />\r\n  </component>\r\n  <component name=\"Git.Settings\">\r\n    <option name=\"RECENT_BRANCH_BY_REPOSITORY\">\r\n      <map>\r\n        <entry key=\"$PROJECT_DIR$\" value=\"dev\" />\r\n      </map>\r\n    </option>\r\n    <option name=\"RECENT_GIT_ROOT_PATH\" value=\"$PROJECT_DIR$\" />\r\n  </component>\r\n  <component name=\"ProjectColorInfo\">{\r\n  &quot;associatedIndex&quot;: 0\r\n}</component>\r\n  <component name=\"ProjectId\" id=\"353KyGCnYJFbynSTGPtdrLF9Edm\" />\r\n  <component name=\"ProjectViewState\">\r\n    <option name=\"hideEmptyMiddlePackages\" value=\"true\" />\r\n    <option name=\"showLibraryContents\" value=\"true\" />\r\n  </component>\r\n  <component name=\"PropertiesComponent\"><![CDATA[{\r\n  \"keyToString\": {\r\n    \"ModuleVcsDetector.initialDetectionPerformed\": \"true\",\r\n    \"RunOnceActivity.ShowReadmeOnStart\": \"true\",\r\n    \"RunOnceActivity.git.unshallow\": \"true\",\r\n    \"git-widget-placeholder\": \"sunweining/feature-20251028175924-学习\",\r\n    \"last_opened_file_path\": \"D:/study_dbqb/Dbqb_Study/孙维宁学习笔记\",\r\n    \"node.js.detected.package.eslint\": \"true\",\r\n    \"node.js.selected.package.eslint\": \"(autodetect)\",\r\n    \"node.js.selected.package.tslint\": \"(autodetect)\",\r\n    \"nodejs_package_manager_path\": \"npm\",\r\n    \"vue.rearranger.settings.migration\": \"true\"\r\n  }\r\n}]]></component>\r\n  <component name=\"RecentsManager\">\r\n    <key name=\"CopyFile.RECENT_KEYS\">\r\n      <recent name=\"D:\\study_dbqb\\Dbqb_Study\\孙维宁学习笔记\" />\r\n    </key>\r\n  </component>\r\n  <component name=\"SharedIndexes\">\r\n    <attachedChunks>\r\n      <set>\r\n        <option value=\"bundled-jdk-9823dce3aa75-fbdcb00ec9e3-intellij.indexing.shared.core-IU-251.26927.53\" />\r\n        <option value=\"bundled-js-predefined-d6986cc7102b-09060db00ec0-JavaScript-IU-251.26927.53\" />\r\n      </set>\r\n    </attachedChunks>\r\n  </component>\r\n  <component name=\"TaskManager\">\r\n    <task id=\"LOCAL-00001\" summary=\"11.1\">\r\n      <option name=\"closed\" value=\"true\" />\r\n      <created>1761983013107</created>\r\n      <option name=\"number\" value=\"00001\" />\r\n      <option name=\"presentableId\" value=\"LOCAL-00001\" />\r\n      <option name=\"project\" value=\"LOCAL\" />\r\n      <updated>1761983013107</updated>\r\n    </task>\r\n    <task id=\"LOCAL-00002\" summary=\"11.1\">\r\n      <option name=\"closed\" value=\"true\" />\r\n      <created>1761983018907</created>\r\n      <option name=\"number\" value=\"00002\" />\r\n      <option name=\"presentableId\" value=\"LOCAL-00002\" />\r\n      <option name=\"project\" value=\"LOCAL\" />\r\n      <updated>1761983018907</updated>\r\n    </task>\r\n    <task id=\"LOCAL-00003\" summary=\"11.5\">\r\n      <option name=\"closed\" value=\"true\" />\r\n      <created>1762333284024</created>\r\n      <option name=\"number\" value=\"00003\" />\r\n      <option name=\"presentableId\" value=\"LOCAL-00003\" />\r\n      <option name=\"project\" value=\"LOCAL\" />\r\n      <updated>1762333284024</updated>\r\n    </task>\r\n    <task active=\"true\" id=\"Default\" summary=\"默认任务\">\r\n      <changelist id=\"1250a154-aa13-4278-9e87-904a86c4dbd2\" name=\"更改\" comment=\"11.5\" />\r\n      <created>1762333567204</created>\r\n      <option name=\"number\" value=\"Default\" />\r\n      <option name=\"presentableId\" value=\"Default\" />\r\n      <updated>1762333567204</updated>\r\n      <workItem from=\"1762333568292\" duration=\"691000\" />\r\n      <workItem from=\"1762390006167\" duration=\"599000\" />\r\n      <workItem from=\"1762421259945\" duration=\"616000\" />\r\n    </task>\r\n    <option name=\"localTasksCounter\" value=\"4\" />\r\n    <servers />\r\n  </component>\r\n  <component name=\"TypeScriptGeneratedFilesManager\">\r\n    <option name=\"version\" value=\"3\" />\r\n  </component>\r\n  <component name=\"VcsManagerConfiguration\">\r\n    <MESSAGE value=\"11.1\" />\r\n    <MESSAGE value=\"11.5\" />\r\n    <option name=\"LAST_COMMIT_MESSAGE\" value=\"11.5\" />\r\n  </component>\r\n</project>
+Subsystem: com.intellij.openapi.diff.impl.patch.CharsetEP
+<+>UTF-8
+===================================================================
+diff --git a/.idea/workspace.xml b/.idea/workspace.xml
+--- a/.idea/workspace.xml	(revision c455a0312d16e71a9a58ec4f162e0e7463461374)
+++ b/.idea/workspace.xml	(date 1762515114727)
+@@ -4,7 +4,7 @@
+     <option name="autoReloadType" value="SELECTIVE" />
+   </component>
+   <component name="ChangeListManager">
+-    <list default="true" id="1250a154-aa13-4278-9e87-904a86c4dbd2" name="更改" comment="11.5">
+    <list default="true" id="1250a154-aa13-4278-9e87-904a86c4dbd2" name="更改" comment="11.6">
+       <change beforePath="$PROJECT_DIR$/.idea/workspace.xml" beforeDir="false" afterPath="$PROJECT_DIR$/.idea/workspace.xml" afterDir="false" />
+     </list>
+     <option name="SHOW_DIALOG" value="false" />
+@@ -15,7 +15,7 @@
+   <component name="Git.Settings">
+     <option name="RECENT_BRANCH_BY_REPOSITORY">
+       <map>
+-        <entry key="$PROJECT_DIR$" value="dev" />
+        <entry key="$PROJECT_DIR$" value="sunweining/feature-20251028175924-学习" />
+       </map>
+     </option>
+     <option name="RECENT_GIT_ROOT_PATH" value="$PROJECT_DIR$" />
+@@ -28,20 +28,20 @@
+     <option name="hideEmptyMiddlePackages" value="true" />
+     <option name="showLibraryContents" value="true" />
+   </component>
+-  <component name="PropertiesComponent"><![CDATA[{
+-  "keyToString": {
+-    "ModuleVcsDetector.initialDetectionPerformed": "true",
+-    "RunOnceActivity.ShowReadmeOnStart": "true",
+-    "RunOnceActivity.git.unshallow": "true",
+-    "git-widget-placeholder": "sunweining/feature-20251028175924-学习",
+-    "last_opened_file_path": "D:/study_dbqb/Dbqb_Study/孙维宁学习笔记",
+-    "node.js.detected.package.eslint": "true",
+-    "node.js.selected.package.eslint": "(autodetect)",
+-    "node.js.selected.package.tslint": "(autodetect)",
+-    "nodejs_package_manager_path": "npm",
+-    "vue.rearranger.settings.migration": "true"
+  <component name="PropertiesComponent">{
+  &quot;keyToString&quot;: {
+    &quot;ModuleVcsDetector.initialDetectionPerformed&quot;: &quot;true&quot;,
+    &quot;RunOnceActivity.ShowReadmeOnStart&quot;: &quot;true&quot;,
+    &quot;RunOnceActivity.git.unshallow&quot;: &quot;true&quot;,
+    &quot;SHARE_PROJECT_CONFIGURATION_FILES&quot;: &quot;true&quot;,
+    &quot;last_opened_file_path&quot;: &quot;D:/study_dbqb/Dbqb_Study/孙维宁学习笔记&quot;,
+    &quot;node.js.detected.package.eslint&quot;: &quot;true&quot;,
+    &quot;node.js.selected.package.eslint&quot;: &quot;(autodetect)&quot;,
+    &quot;node.js.selected.package.tslint&quot;: &quot;(autodetect)&quot;,
+    &quot;nodejs_package_manager_path&quot;: &quot;npm&quot;,
+    &quot;vue.rearranger.settings.migration&quot;: &quot;true&quot;
+   }
+-}]]></component>
+}</component>
+   <component name="RecentsManager">
+     <key name="CopyFile.RECENT_KEYS">
+       <recent name="D:\study_dbqb\Dbqb_Study\孙维宁学习笔记" />
+@@ -89,8 +89,18 @@
+       <workItem from="1762333568292" duration="691000" />
+       <workItem from="1762390006167" duration="599000" />
+       <workItem from="1762421259945" duration="616000" />
+      <workItem from="1762492519774" duration="992000" />
+      <workItem from="1762515015836" duration="99000" />
+    </task>
+    <task id="LOCAL-00004" summary="11.6">
+      <option name="closed" value="true" />
+      <created>1762514905809</created>
+      <option name="number" value="00004" />
+      <option name="presentableId" value="LOCAL-00004" />
+      <option name="project" value="LOCAL" />
+      <updated>1762514905809</updated>
+     </task>
+-    <option name="localTasksCounter" value="4" />
+    <option name="localTasksCounter" value="5" />
+     <servers />
+   </component>
+   <component name="TypeScriptGeneratedFilesManager">
+@@ -99,6 +109,7 @@
+   <component name="VcsManagerConfiguration">
+     <MESSAGE value="11.1" />
+     <MESSAGE value="11.5" />
+-    <option name="LAST_COMMIT_MESSAGE" value="11.5" />
+    <MESSAGE value="11.6" />
+    <option name="LAST_COMMIT_MESSAGE" value="11.6" />
+   </component>
+ </project>
+\ No newline at end of file
--- a/孙维宁学习笔记/11.8孙维宁学习笔记.docx
+++ b/孙维宁学习笔记/11.8孙维宁学习笔记.docx
--- a/孙维宁学习笔记/孙维宁-双十一机器人项目方案学习笔记-11.8.docx
+++ b/孙维宁学习笔记/孙维宁-双十一机器人项目方案学习笔记-11.8.docx
--- a/尹顺宇学习笔记/尹顺宇11.08作业/尹顺宇11.08学习总结.docx
+++ b/尹顺宇学习笔记/尹顺宇11.08作业/尹顺宇11.08学习总结.docx
--- a/尹顺宇学习笔记/尹顺宇11.08作业/尹顺宇11.08学习笔记.md
+++ b/尹顺宇学习笔记/尹顺宇11.08作业/尹顺宇11.08学习笔记.md
@ -0,0 +1,379 @@
+# Mybatis初步复习
+
+## 1.SpringBoot整合Mybatis
+
+## 1.1第一步添加依赖
+
+```
+<!--        mybatis启动器-->
+    
+        <dependency>
+            <groupId>org.mybatis.spring.boot</groupId>
+            <artifactId>mybatis-spring-boot-starter</artifactId>
+            <version>3.0.5</version>
+        </dependency>
+
+```
+
+
+
+###  1.2进行配置
+
+```
+#配置Mybatis
+mybatis:
+  configuration:
+    #在映射为java对象，将表中的下划线命名自动转换成驼峰式命名
+    map-underscore-to-camel-case: true
+    #日志前缀   可选
+    log-prefix: mybatis.
+    #日志实现类  可选
+    log-impl: org.apache.ibatis.logging.commons.JakartaCommonsLoggingImpl
+  #动态sql文件存储位置  
+  mapper-locations: classpath:/mapper/**/*.xml
+
+#配置日志显示sql
+logging:
+  level:
+    #指定日志前缀
+    mybatis: debug
+    
+
+```
+
+### 1.3 在Dao层编写的mapper接口，添加@Mapper注解
+
+![1762578862653](C:\Users\Administrator\AppData\Roaming\Typora\typora-user-images\1762578862653.png)
+
+### 1.4 编写动态sql文件（xx.xml文件）
+
+![1762578878514](C:\Users\Administrator\AppData\Roaming\Typora\typora-user-images\1762578878514.png)
+
+### 1.5 安装mybatisx插件
+
+![1762578934144](C:\Users\Administrator\AppData\Roaming\Typora\typora-user-images\1762578934144.png)
+
+安装之后在mapper和动态SQL文件对应代码左边有一个小鸟图标，方便直接跳转 
+
+![1762578917583](C:\Users\Administrator\AppData\Roaming\Typora\typora-user-images\1762578917583.png)
+
+## 2.自动映射
+
+当开启驼峰命名自动映射
+
+```yaml
+mybatis:
+  configuration:
+    map-underscore-to-camel-case: true
+```
+
+## 3.手动映射
+
+当自动映射无法满足需求时，可以使用 `<resultMap>` 进行精确的手动映射。
+
+```xml
+<resultMap id="唯一标识" type="要映射的Java类型">
+    <!-- 主键映射 -->
+    <id property="Java属性名" column="数据库列名"/>
+    
+    <!-- 普通字段映射 -->
+    <result property="Java属性名" column="数据库列名"/>
+    
+    <!-- 关联关系映射 -->
+    <association property="关联对象属性" javaType="关联对象类型"/>
+    <collection property="集合属性" ofType="集合元素类型"/>
+</resultMap>
+```
+
+举例：
+
+### 3.1基础字段映射
+
+```java
+实体类
+public class User {
+    private Long userId;           // 与数据库字段名不同
+    private String userName;       // 需要手动映射
+    private String email;
+    private Integer status;
+    private LocalDateTime createTime;
+    private LocalDateTime updateTime;
+    
+    // 构造函数、getter、setter...
+}
+```
+
+```sql
+数据库表结构：
+CREATE TABLE t_user (
+    id BIGINT PRIMARY KEY,
+    name VARCHAR(50),
+    email VARCHAR(100),
+    status TINYINT,
+    created_at DATETIME,
+    updated_at DATETIME
+);
+
+```
+
+```xml
+<!-- 基础手动映射示例 -->
+<resultMap id="BaseUserMap" type="User">
+    <!-- 主键字段，使用 id 标签 -->
+    <id property="userId" column="id"/>
+    
+    <!-- 普通字段，使用 result 标签 -->
+    <result property="userName" column="name"/>
+    <result property="email" column="email"/>
+    <result property="status" column="status"/>
+    <result property="createTime" column="created_at"/>
+    <result property="updateTime" column="updated_at"/>
+</resultMap>
+
+<!-- 使用 resultMap -->
+<select id="selectUserById" resultMap="BaseUserMap">
+    SELECT id, name, email, status, created_at, updated_at
+    FROM t_user
+    WHERE id = #{id}
+</select>
+```
+
+说明：
+
+![1762581420222](C:\Users\Administrator\AppData\Roaming\Typora\typora-user-images\1762581420222.png)
+
+### 3.2一对一关联映射
+
+#### 3.2.1单次查询嵌套结果映射
+
+举例：
+
+```java
+实体类
+public class User {
+    private Long userId;
+    private String userName;
+    private UserProfile userProfile; // 一对一关联
+    // getter/setter...
+}
+
+public class UserProfile {
+    private Long profileId;
+    private Long userId;
+    private String realName;
+    private Integer age;
+    private String address;
+    private String phone;
+    // getter/setter...
+}
+```
+
+```xml
+手动映射配置：
+<!-- 用户和用户详情的一对一映射 -->
+<resultMap id="UserWithProfileMap" type="User">
+    <id property="userId" column="id"/>
+    <result property="userName" column="name"/>
+    
+    <!-- association: 一对一关联映射 -->
+    <association property="userProfile" javaType="UserProfile">
+        <id property="profileId" column="profile_id"/>
+        <result property="userId" column="id"/> <!-- 注意：这里复用外层查询的id -->
+        <result property="realName" column="real_name"/>
+        <result property="age" column="age"/>
+        <result property="address" column="address"/>
+        <result property="phone" column="phone"/>
+    </association>
+</resultMap>
+
+<!-- 关联查询SQL -->
+<select id="selectUserWithProfile" resultMap="UserWithProfileMap">
+    SELECT 
+        u.id, u.name,
+        up.id as profile_id, up.real_name, up.age, up.address, up.phone
+    FROM t_user u
+    LEFT JOIN t_user_profile up ON u.id = up.user_id
+    WHERE u.id = #{userId}
+</select>
+```
+
+#### 3.2.2 多次查询嵌套查询映射 
+
+```xml
+<!-- 主结果映射 -->
+<resultMap id="UserWithProfileNestedMap" type="User">
+    <id property="userId" column="id"/>
+    <result property="userName" column="name"/>
+    
+    <!-- 嵌套查询：通过 select 属性引用另一个查询 -->
+    <association property="userProfile" column="id" 
+                 select="selectUserProfileByUserId"/>
+</resultMap>
+
+<!-- 主查询 -->
+<select id="selectUserWithProfileNested" resultMap="UserWithProfileNestedMap">
+    SELECT id, name
+    FROM t_user
+    WHERE id = #{userId}
+</select>
+
+<!-- 嵌套查询 -->
+<select id="selectUserProfileByUserId" resultType="UserProfile">
+    SELECT 
+        id as profileId, 
+        user_id as userId,
+        real_name as realName,
+        age, address, phone
+    FROM t_user_profile`
+    WHERE user_id = #{userId}
+</select>
+```
+
+
+
+### 3.3一对多集合映射
+
+```java
+实体类：
+public class User {
+    private Long userId;
+    private String userName;
+    private List<Order> orders; // 一对多关联
+    // getter/setter...
+}
+
+public class Order {
+    private Long orderId;
+    private Long userId;
+    private String orderNumber;
+    private BigDecimal amount;
+    private LocalDateTime orderTime;
+    // getter/setter...
+}
+```
+
+```xml
+<!-- 用户和订单的一对多映射 -->
+<resultMap id="UserWithOrdersMap" type="User">
+    <id property="userId" column="id"/>
+    <result property="userName" column="name"/>
+    
+    <!-- collection: 一对多关联映射 -->
+    <collection property="orders" ofType="Order">
+        <id property="orderId" column="order_id"/>
+        <result property="userId" column="id"/> <!-- 注意：这里复用外层查询的id -->
+        <result property="orderNumber" column="order_number"/>
+        <result property="amount" column="amount"/>
+        <result property="orderTime" column="order_time"/>
+    </collection>
+</resultMap>
+
+<!-- 关联查询SQL -->
+<select id="selectUserWithOrders" resultMap="UserWithOrdersMap">
+    SELECT 
+        u.id, u.name,
+        o.id as order_id, o.order_number, o.amount, o.order_time
+    FROM t_user u
+    LEFT JOIN t_order o ON u.id = o.user_id
+    WHERE u.id = #{userId}
+</select>
+```
+
+### 3.4复杂的多层嵌套
+
+```java
+public class User {
+    private Long userId;
+    private String userName;
+    private List<Order> orders;
+}
+
+public class Order {
+    private Long orderId;
+    private String orderNumber;
+    private List<OrderItem> orderItems;
+}
+
+public class OrderItem {
+    private Long itemId;
+    private Long productId;
+    private Integer quantity;
+    private Product product; // 关联商品
+}
+
+public class Product {
+    private Long productId;
+    private String productName;
+    private BigDecimal price;
+}
+```
+
+```xml
+<!-- 完整的多层嵌套映射 -->
+<resultMap id="CompleteUserMap" type="User">
+    <id property="userId" column="user_id"/>
+    <result property="userName" column="user_name"/>
+    
+    <!-- 第一层嵌套：订单集合 -->
+    <collection property="orders" ofType="Order" resultMap="OrderWithItemsMap"/>
+</resultMap>
+
+<resultMap id="OrderWithItemsMap" type="Order">
+    <id property="orderId" column="order_id"/>
+    <result property="orderNumber" column="order_number"/>
+    
+    <!-- 第二层嵌套：订单项集合 -->
+    <collection property="orderItems" ofType="OrderItem" resultMap="OrderItemMap"/>
+</resultMap>
+
+<resultMap id="OrderItemMap" type="OrderItem">
+    <id property="itemId" column="item_id"/>
+    <result property="quantity" column="quantity"/>
+    
+    <!-- 第三层嵌套：商品信息 -->
+    <association property="product" javaType="Product">
+        <id property="productId" column="product_id"/>
+        <result property="productName" column="product_name"/>
+        <result property="price" column="price"/>
+    </association>
+</resultMap>
+
+<!-- 复杂查询SQL -->
+<select id="selectUserWithOrderDetails" resultMap="CompleteUserMap">
+    SELECT 
+        u.id as user_id, u.name as user_name,
+        o.id as order_id, o.order_number,
+        oi.id as item_id, oi.quantity,
+        p.id as product_id, p.name as product_name, p.price
+    FROM t_user u
+    LEFT JOIN t_order o ON u.id = o.user_id
+    LEFT JOIN t_order_item oi ON o.id = oi.order_id
+    LEFT JOIN t_product p ON oi.product_id = p.id
+    WHERE u.id = #{userId}
+    ORDER BY o.order_time DESC, oi.id
+</select>
+```
+
+### 3.5.注意
+
+1.可以 自动映射与手动映射结合
+
+```xml
+<!-- 混合映射：autoMapping="true" 开启自动映射 -->
+<resultMap id="HybridUserMap" type="User" autoMapping="true">
+    <!-- 只手动映射名称不匹配的字段 -->
+    <id property="userId" column="id"/>
+    <result property="userName" column="name"/>
+    <result property="createTime" column="created_at"/>
+    
+    <!-- 关联对象也可以使用自动映射 -->
+    <association property="userProfile" javaType="UserProfile" autoMapping="true">
+        <id property="profileId" column="profile_id"/>
+        <!-- 只覆盖需要特殊处理的字段 -->
+        <result property="realName" column="real_name"/>
+    </association>
+</resultMap>
+```
+
+##
+
--- a/尹顺宇学习笔记/尹顺宇11.08作业/尹顺宇11.08学习笔记.pdf
+++ b/尹顺宇学习笔记/尹顺宇11.08作业/尹顺宇11.08学习笔记.pdf
--- a/尹顺宇学习笔记/尹顺宇11.08作业/尹顺宇11.08股票知识学习.docx
+++ b/尹顺宇学习笔记/尹顺宇11.08作业/尹顺宇11.08股票知识学习.docx
--- a/李延霜学习笔记/李延霜11.8学习总结.docx
+++ b/李延霜学习笔记/李延霜11.8学习总结.docx