From 56f4d656a41f19233cc805fcd6f141b142de7cfc Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E6=9E=97=E4=BF=8A=E4=BC=9F?= <2421084001@qq.com>
Date: Wed, 20 Dec 2023 12:22:15 +0800
Subject: [PATCH 1/2] =?UTF-8?q?=E4=BD=9C=E4=B8=9A?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 ...00\346\254\241\344\275\234\344\270\232.md" | 20 +++++++++++++++++++
 1 file changed, 20 insertions(+)
 create mode 100644 "12 \346\236\227\344\277\212\344\274\237/1219 \347\254\254\344\270\200\346\254\241\344\275\234\344\270\232.md"

diff --git "a/12 \346\236\227\344\277\212\344\274\237/1219 \347\254\254\344\270\200\346\254\241\344\275\234\344\270\232.md" "b/12 \346\236\227\344\277\212\344\274\237/1219 \347\254\254\344\270\200\346\254\241\344\275\234\344\270\232.md"
new file mode 100644
index 0000000..f3c3d7d
--- /dev/null
+++ "b/12 \346\236\227\344\277\212\344\274\237/1219 \347\254\254\344\270\200\346\254\241\344\275\234\344\270\232.md"	
@@ -0,0 +1,20 @@
+import org.junit.Test;
+
+public class Tap {
+    @Test
+    public void i(){
+        System.out.println(111);
+    }
+}
+```
+
+```java
+<dependencies>
+        <dependency>
+            <groupId>junit</groupId>
+            <artifactId>junit</artifactId>
+            <version>3.8.1</version>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+maven对项目构建过程分为三套相互独立的生命周期，这里说的三套而且是相互独立， 这三套分别是： Clean Lifecycle ：在进行真正的构建之前进行一些清理工作。 Default Lifecycle ：构建的核心部分，编译，测试，打包，部署等等。 Site Lifecycle ：生成项目报告，站点，发布站点。
\ No newline at end of file
-- 
Gitee


From 68ac3e0786e0a23ed9dd6ed1192dd161867c3fbb Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E6=9E=97=E4=BF=8A=E4=BC=9F?= <2421084001@qq.com>
Date: Mon, 25 Dec 2023 20:44:28 +0800
Subject: [PATCH 2/2] =?UTF-8?q?=E4=BD=9C=E4=B8=9A?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 ...14\346\254\241\344\275\234\344\270\232.md" | 55 +++++++++++++++++++
 ...11\346\254\241\344\275\234\344\270\232.md" | 34 ++++++++++++
 2 files changed, 89 insertions(+)
 create mode 100644 "12 \346\236\227\344\277\212\344\274\237/1220 \347\254\254\344\272\214\346\254\241\344\275\234\344\270\232.md"
 create mode 100644 "12 \346\236\227\344\277\212\344\274\237/1222 \347\254\254\344\270\211\346\254\241\344\275\234\344\270\232.md"

diff --git "a/12 \346\236\227\344\277\212\344\274\237/1220 \347\254\254\344\272\214\346\254\241\344\275\234\344\270\232.md" "b/12 \346\236\227\344\277\212\344\274\237/1220 \347\254\254\344\272\214\346\254\241\344\275\234\344\270\232.md"
new file mode 100644
index 0000000..47f56b5
--- /dev/null
+++ "b/12 \346\236\227\344\277\212\344\274\237/1220 \347\254\254\344\272\214\346\254\241\344\275\234\344\270\232.md"	
@@ -0,0 +1,55 @@
+<!DOCTYPE mapper
+        PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
+        "https://mybatis.org/dtd/mybatis-3-mapper.dtd">
+<mapper namespace="test">
+    <select id="selectAll" resultType="com.okk.pojo.User">
+       select * from tb_user;
+    </select>
+<!DOCTYPE configuration
+        PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
+        "https://mybatis.org/dtd/mybatis-3-config.dtd">
+<configuration>
+    <environments default="development">
+<!--        教室-->
+        <environment id="development">
+            <transactionManager type="JDBC"/>
+            <dataSource type="POOLED">
+                <property name="driver" value="com.mysql.cj.jdbc.Driver"/>
+                <property name="url" value="jdbc:mysql://localhost:3306/mybatis?allowPublicKeyRetrieval=true&amp;useSSL=false"/>
+                <property name="username" value="root"/>
+                <property name="password" value="root"/>
+            </dataSource>
+      </environment>
+
+
+    <?xml version="1.0" encoding="UTF-8" ?>
+    </environments>
+    <mappers>
+    <!--        SQL语句的映射文件-->
+            <mapper resource="UserMapper.xml"/>
+    <!--        <mapper resource="BookMapper.xml"/>-->
+        </mappers>
+    </configuration>
+    <?xml version="1.0" encoding="UTF-8" ?>
+    <select id="selectById" resultType="com.okk.pojo.User">
+        select * from tb_user where id = #{id}
+    </select>
+    
+    <insert id="insert">
+        insert into tb_user (username, age, gender) VALUES (#{username}, #{age}, #{gender})
+        <!--insert into tb_user values (null,#{username}, #{age}, #{gender})-->
+        </insert>
+    <delete id="deleteById">
+        delete from tb_user where id = #{id}
+    </delete>
+    
+    <update id="update">
+        update tb_user
+        set username = #{username},
+            age      = #{age},
+            gender   =#{gender}
+        where id = #{id};
+    </update>
+    </mapper>
+
+
diff --git "a/12 \346\236\227\344\277\212\344\274\237/1222 \347\254\254\344\270\211\346\254\241\344\275\234\344\270\232.md" "b/12 \346\236\227\344\277\212\344\274\237/1222 \347\254\254\344\270\211\346\254\241\344\275\234\344\270\232.md"
new file mode 100644
index 0000000..7dd2c32
--- /dev/null
+++ "b/12 \346\236\227\344\277\212\344\274\237/1222 \347\254\254\344\270\211\346\254\241\344\275\234\344\270\232.md"	
@@ -0,0 +1,34 @@
+# 笔记
+
+```java
+使用Mapper代理方式，必须满足以下要求：
+1.定义与SQL映射文件同名的Mapper接口，
+2.在 Mapper 接口中定义方法，方法名就是SQL映射文件中sql语句的id，并保持
+参数类型和返回值类型一致
+ namespace:名称空间。必须是对应接口的全限定名 >
+<mapper namespace="com.mdd.mapper.UserMapper">
+<select id="selectAll"
+resultType="com.itheima.pojo.User">
+select * from tb_user;
+/
+select>
+/
+mapper>
+<mappers>
+ 加载sql映射文件 >
+<mapper resource="com/mdd/mapper/UserMapper.xml" >
+ Mapper代理方式 >
+ <package name="com.mdd.mapper" > >
+/
+mappers>
+/
+3. 执行sql
+/
+3.1 获取UserMapper接口的代理对象
+UserMapper userMapper =
+sqlSession.getMapper(UserMapper.class);
+List<User> users = userMapper.selectAll();
+3.设置SQL映射文件的namespace属性为Mapper接口全限定名
+4.核心配置文件中的mapper路径要根据sql映射文件的实际路径改变（具体文件或
+包扫描）
+5.执行sql的方法改成getMapper()的方法
\ No newline at end of file
-- 
Gitee