本篇文章介绍在IDEA工具下mybatis快速入门程序分为以下五步
? 1 添加依赖包
? 2 编写pojo对象
? 3 编写映射文件
? 4 编写核心配置文件
? 5 测试框架
详细如下
建立Module后
? 1 添加依赖包 在pox.xml 添加 代码如下
<properties>
<maven.coppiler.source>1.9</maven.coppiler.source>
<maven.coppiler.target>1.9</maven.coppiler.target>
</properties>
<dependencies>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.6</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
</dependency>
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>3.4.5</version>
</dependency>
</dependencies>
? 2 编写pojo对象 就是表中的实体类
? 3 编写映射文件 代码如下
<?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="cn.lijun.Users"> <select id="findAll" resultType="domain.Users"> SELECT * FROM users; </select> </mapper>
? 4 编写核心配置文件 代码如下
<?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://127.0.0.1:3306/mybatis9501?characterEncoding=utf8" /> <property name="username" value="root" /> <property name="password" value="root" /> </dataSource> </environment> </environments> <!--映射文件路径--> <mappers> <mapper resource="cn/lijun/UsersMapper.xml"></mapper> </mappers></configuration>
? 5 测试框架 在test对应的包下建立 如图
代码如下
/** * @author lijun * @date 2019/6/28 11:44 */public class TestCusom { @Test public void test(){ InputStream inputStream = this.getClass().getClassLoader().getResourceAsStream("SqlMapConfig.xml"); // 创建工厂对象 System.out.println(inputStream); SqlSessionFactoryBuilder sqlSessionFactoryBuilder= new SqlSessionFactoryBuilder(); System.out.println(sqlSessionFactoryBuilder); SqlSessionFactory sessionFactory = sqlSessionFactoryBuilder.build(inputStream); SqlSession sqlSession = sessionFactory.openSession(); System.out.println(sqlSession); List<Object> list = sqlSession.selectList("cn.lijun.Dao.Users.findAll"); for(Object o :list){ System.out.println(o); } }}
原文地址：https://www.cnblogs.com/lijun6/p/11105273.html