Maven项目中使用Mybatis框架

       <!--版本建议换成提示的更安全的版本-->
        <!-- mybatis插件 -->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>3.5.6</version>
        </dependency>
        <!--mysql相关依赖  -->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>8.0.33</version>
        </dependency>
        <!--单元测试依赖  -->
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.13.1</version>
            <scope>test</scope>
        </dependency>
        <!--lombok插件-->
        <!--写实体类时方便生成相关的get/set/构造器等方法-->
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>1.18.18</version>
        </dependency>
    </dependencies>

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE configuration
        PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
        "https://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
    <settings>
     <!--空着，待会儿补充 -->
    </settings>
    <environments default="development">
        <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/数据库名字"/>
                <property name="username" value="用户名"/>
                <property name="password" value="密码"/>
            </dataSource>

        </environment>
    </environments>

    <mappers>

<!--空着，待会儿补充 -->

</mappers>

 </configuration>

1 @Data
2 public class Owner {
3     private Integer id;//业主id
4     private String  OwnerName;//业主姓名
5     private String  OwnerSex;//业主性别
6     private String  OwnerTel;//业主电话
7 }

1 public interface OwnerMapper {
2     //写一个作为例子
3     //添加一个业主
4     void addAOwner(Owner Owner);
5 }

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper
        PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
        "https://mybatis.org/dtd/mybatis-3-mapper.dtd">
<!-- namespace写你刚刚编写的mapper接口，类似于之前的实现这个接口-->
<mapper namespace="com.wsl.wuye.mapper.OwnerMapper">

  <!-- 对应接口里的方法名字，添加namespace后可以点击接口里的提示自动在这里面创建，类似于自动生成实现接口方法-->
    <insert id="addAOwner">
        insert into owner(owner_name,owner_sex,owner_tel)
        values (#{ownerName},#{ownerSex},#{ownerTel})
    </insert>

</mapper>

<!-- 现在你可以在刚刚空着的部分添加以下配置-->

 <settings>
     <!-- 解决实体类的属性跟数据库字段名的映射问题，下划线会帮你对映驼峰命名-->
        <setting name="mapUnderscoreToCamelCase" value="true"/>
       <!-- 内置日志，配置可以查看你的sql语句，你也可以使用其他的日志框架-->
 <setting name="logImpl" value="STDOUT_LOGGING"/>
    </settings>

<mappers>
        <!-- 刚刚你编写xml文件的路径 写了框架才能帮你找到-->
        <mapper resource="mappers/OwnerMapper.xml"/>
    </mappers>

 1 public class OwnerMapperTest {
 2     private SqlSession sqlSession;
 3     private OwnerMapper mapper;
 4 
 5     @Before //表示在测试方法执行前执行
 6     public void init() {
 7         //1.获取配置文件mybatis-config.xml的流对象
 8         InputStream stream;
 9         try {
               //注意别导错包了，是apache下那个
10             stream = Resources.getResourceAsStream("mybatis-config.xml");
11         } catch (IOException e) {
12             throw new RuntimeException(e);
13         }
14 
15         //2. 获取一个SqlSessionFactory对象
16         SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(stream);
17 
18         //3.通过工厂类SqlSessionFactory生成SqlSession对象
19         sqlSession = sqlSessionFactory.openSession();
20 
21         //4.获取OwnerMapper的代理
22         mapper = sqlSession.getMapper(OwnerMapper.class);
23     }
24  @After //测试方法后执行
25     public void commit() {
26         //6.提交事务
27         sqlSession.commit();
28     }
29     @Test
30     public void testAddAOwner() {
31         //5.测试添加一个业主对象的方法
32         Owner m = new Owner();
33         m.setId(50);
34         m.setOwnerName("齐虎");
35         m.setOwnerSex("男");
36         m.setOwnerTel("15665457345");
37         mapper.addAOwner(m);
38     }
39 }