搭建mybatis框架，采用测试文件测试添加，删除，修改，更新，模糊查询的方法

以下是搭建MyBatis框架并进行基本操作的示例代码：

1. 首先，需要在maven中添加MyBatis和数据库驱动的依赖：

<dependencies>
    <!-- MyBatis -->
    <dependency>
        <groupId>org.mybatis</groupId>
        <artifactId>mybatis</artifactId>
        <version>3.5.7</version>
    </dependency>

    <!-- 数据库驱动 -->
    <dependency>
        <groupId>com.mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
        <version>8.0.25</version>
    </dependency>
</dependencies>

2. 创建数据库表和对应的Java实体类，并在MyBatis配置文件中添加相关配置：

<!-- 数据库连接配置 -->
<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/test?useSSL=false&amp;useUnicode=true&amp;characterEncoding=UTF-8&amp;serverTimezone=Asia/Shanghai" />
            <property name="username" value="root" />
            <property name="password" value="root" />
        </dataSource>
    </environment>
</environments>

<!-- 映射器配置 -->
<mappers>
    <mapper resource="mapper/UserMapper.xml" />
</mappers>

3. 创建映射器接口和对应的映射器XML文件，并在XML文件中编写对应的SQL语句：

UserMapper.java

public interface UserMapper {
    // 添加用户
    void addUser(User user);

    // 根据ID删除用户
    void deleteUserById(Integer id);

    // 修改用户
    void updateUser(User user);

    // 根据ID查询用户
    User getUserById(Integer id);

    // 模糊查询用户
    List<User> getUserByKeyword(String keyword);
}

UserMapper.xml

<mapper namespace="com.example.mapper.UserMapper">
    <!-- 添加用户 -->
    <insert id="addUser" parameterType="com.example.entity.User">
        insert into user(name, age, gender) values (#{name}, #{age}, #{gender})
    </insert>

    <!-- 根据ID删除用户 -->
    <delete id="deleteUserById" parameterType="java.lang.Integer">
        delete from user where id = #{id}
    </delete>

    <!-- 修改用户 -->
    <update id="updateUser" parameterType="com.example.entity.User">
        update user set name = #{name}, age = #{age}, gender = #{gender} where id = #{id}
    </update>

    <!-- 根据ID查询用户 -->
    <select id="getUserById" parameterType="java.lang.Integer" resultType="com.example.entity.User">
        select * from user where id = #{id}
    </select>

    <!-- 模糊查询用户 -->
    <select id="getUserByKeyword" parameterType="java.lang.String" resultType="com.example.entity.User">
        select * from user where name like concat('%', #{keyword}, '%') or gender like concat('%', #{keyword}, '%')
    </select>
</mapper>

4. 创建测试类，并使用SqlSessionFactory和SqlSession获取Mapper接口实例进行数据库操作：

public class UserMapperTest {
    private static SqlSessionFactory sqlSessionFactory;

    @BeforeClass
    public static void setUp() throws Exception {
        String resource = "mybatis-config.xml";
        InputStream inputStream = Resources.getResourceAsStream(resource);
        sqlSessionFactory = new SqlSessionFactoryBuilder().build(inputStream);
    }

    @Test
    public void testAddUser() {
        try (SqlSession session = sqlSessionFactory.openSession()) {
            UserMapper mapper = session.getMapper(UserMapper.class);
            User user = new User("Tom", 18, "male");
            mapper.addUser(user);
            session.commit();
        }
    }

    @Test
    public void testDeleteUserById() {
        try (SqlSession session = sqlSessionFactory.openSession()) {
            UserMapper mapper = session.getMapper(UserMapper.class);
            mapper.deleteUserById(1);
            session.commit();
        }
    }

    @Test
    public void testUpdateUser() {
        try (SqlSession session = sqlSessionFactory.openSession()) {
            UserMapper mapper = session.getMapper(UserMapper.class);
            User user = new User(2, "Lucy", 20, "female");
            mapper.updateUser(user);
            session.commit();
        }
    }

    @Test
    public void testGetUserById() {
        try (SqlSession session = sqlSessionFactory.openSession()) {
            UserMapper mapper = session.getMapper(UserMapper.class);
            User user = mapper.getUserById(2);
            System.out.println(user);
        }
    }

    @Test
    public void testGetUserByKeyword() {
        try (SqlSession session = sqlSessionFactory.openSession()) {
            UserMapper mapper = session.getMapper(UserMapper.class);
            List<User> userList = mapper.getUserByKeyword("m");
            for (User user : userList) {
                System.out.println(user);
            }
        }
    }
}

这样，就可以进行基本的增删改查和模糊查询操作了。