Mybatis - 环境搭建

1. 导入依赖坐标：

   <!--驱动-->
           <dependency>
               <groupId>mysql</groupId>
               <artifactId>mysql-connector-java</artifactId>
               <version>5.1.6</version>
           </dependency>
           <!--mybatis-->
           <dependency>
               <groupId>org.mybatis</groupId>
               <artifactId>mybatis</artifactId>
               <version>3.4.5</version>
           </dependency>
           <!--单元测试-->
           <dependency>
               <groupId>junit</groupId>
               <artifactId>junit</artifactId>
               <version>4.13</version>
               <scope>test</scope>
           </dependency>
   

2. 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>
   	<!--引入jdbc配置文件-->
       <properties resource="jdbc.properties"/>
       <!--设置别名-->
       <typeAliases>
           <package name="com.frank.pojo"/>
       </typeAliases>
       <environments default="development">
           <environment id="development">
               <transactionManager type="JDBC"></transactionManager>
               <dataSource type="POOLED">
                   <property name="driver" value="${driver}"/>
                   <property name="url" value="${url}"/>
                   <property name="username" value="${username}"/>
                   <property name="password" value="${password}"/>
               </dataSource>
           </environment>
       </environments>
   	<!--xml映射文件-->
       <mappers>
           <package name="com.frank.mapper"/>
       </mappers>
   </configuration>
   </configuration>
   

   jdbc.properties：

   driver=com.mysql.jdbc.Driver
   url=jdbc:mysql:///mybatis?useUnicode=true&characterEncoding=utf8
   username=root
   password=root
   

   xml映射文件：

   <?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="com.frank.mapper.xxxMapper">
     
   </mapper>
   

3. Mybatis工具类：

   public class MybatisUtils {
         
         
       private static SqlSessionFactory factory;
   
       static {
         
         
           try {
         
         
               String resource = "mybatis-config.xml";
               InputStream is = Resources.getResourceAsStream(resource);
               factory = new SqlSessionFactoryBuilder().build(is);
               is.close();
           } catch (IOException e) {
         
         
               e.printStackTrace();
           }
       }
   
       public static SqlSession getSqlSession() {
         
         
           return factory.openSession();
       }
   }