参考

• https://mybatis.org/mybatis-3/zh/getting-started.html

配置

• pom.xml 加入 依赖

  <dependency>
    <groupId>org.mybatis</groupId>
    <artifactId>mybatis</artifactId>
    <version>x.x.x</version>
  </dependency>

• 配置mybatis

  <?xml version="1.0" encoding="UTF-8" ?>
  <!DOCTYPE configuration
          PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
          "http://mybatis.org/dtd/mybatis-3-config.dtd">
  <configuration>
      <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/mybatis"/>
                  <property name="username" value="root"/>
                  <property name="password" value="091834123"/>
              </dataSource>
          </environment>
      </environments>
      <mappers>
          <mapper resource="com/example/mybatis/t1Mapper.xml"/>
      </mappers>
  </configuration>

实现一个工具类

• 主要保存官方给的3行代码

  String resource = "org/mybatis/example/mybatis-config.xml";
  InputStream inputStream = Resources.getResourceAsStream(resource);
  SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(inputStream);

注意

• 导包
• mybatis配置
• 后面的mapper配置文件一定要在mybatis配置文件中