直接使用maven搭建一个mybatis的运行环境
1. pom.xml
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion> <groupId>qinfeng.zheng</groupId>
<artifactId>learn-mybatis</artifactId>
<version>1.0-SNAPSHOT</version>
<dependencies>
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>3.5.2</version>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>1.18.0</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.47</version>
</dependency>
</dependencies> </project>
2. mybatis主配置文件：mybatis-config.xml
<?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.jdbc.Driver"/>
<property name="url" value="jdbc:mysql://120.79.xx.yy:3306/test"/>
<property name="username" value="root"/>
<property name="password" value="123456"/>
</dataSource>
</environment>
</environments>
<mappers>
<mapper resource="mapper/FemaleMapper.xml"/>
</mappers>
</configuration>
3. 数据库实体类Female.java
import lombok.Data; @Data
public class Female {
private Integer id;
private String name;
}
4. mybatis接口类 FemaleMapper.java
import qinfeng.zheng.entity.Female;
public interface FemaleMapper {
Female getFemaleById(int id);
// int addFemale(FemaleMapper female);
}
5. Mybatis接口对应的xml文件， FemaleMapper.xml
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper
PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-mapper.dtd"> <mapper namespace="qinfeng.zheng.FemaleMapper">
<select id="getFemaleById" resultType="qinfeng.zheng.entity.Female" parameterType="int">
SELECT id,name FROM tb_female where id = #{id};
</select> </mapper>
至此，mybatis的运行环境，就算搭建成功了，下面写一段测试代码
6. 测试代码
public class V1Test {
public static void main(String[] args) {
try (InputStream is = Resources.getResourceAsStream("mybatis-config.xml")) {
SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(is);
SqlSession sqlSession = sqlSessionFactory.openSession(true);
FemaleMapper femaleMapper = sqlSession.getMapper(FemaleMapper.class);
Female female = femaleMapper.getFemaleById(1);
System.out.println(female);
} catch (Exception e) {
e.printStackTrace();
}
}
}
运行代码 ， 打印结果如下：
好，环境没问题，测试也成功了，下面可以开始阅读mybatis的源码了！