回顾JDBC
- 注冊驱动 (仅仅做一次)
2. 建立连接(Connection)
3. 创建运行SQL的语句(Statement)
4. 运行语句
5. 处理运行结果(ResultSet)
6. 释放资源
JDBC优缺点
优点：简单易学,上手快,非常灵活构建SQL，效率高
缺点：代码繁琐，难以写出高质量的代码（例如：资源的释放，SQL注入安全性等）
开发者既要写业务逻辑，又要写对象的创建和销毁，必须管底层具体数据库的语法
（例如：分页）。
适合于超大批量数据的操作，速度快
Mybatist特点
MyBatis 本是apache的一个开源项目iBatis, 2010年这个项目由apache software foundation 迁移到了google code，并且改名为MyBatis 。2013年11月迁移到Github。
iBATIS一词来源于“internet”和“abatis”的组合，是一个基于Java的持久层框架。iBATIS提供的持久层框架包括SQL Maps和Data Access Objects（DAO）
jdbc/dbutils/springdao，hibernate/springorm，mybaits同属于ORM解决方案之一
创建mybatis项目
在IDEA中
File--New---Project
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新建Maven项目
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填写组织ID和工程ID
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选择正确的maven环境
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填写Project名字和存储路径
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Finish
等待进度条完成点击import changes
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检查自动生成的项目骨架是否完整
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main--new--Directory
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文件夹名称为java
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同样的操作新建文件夹resources
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java--Mark Directory as --Sources Root
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resources--Mark Directory as --Resources Root
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至此，maven项目创建完毕，接下来导入mybatis所需第三方jar包
打开pom.xml
<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>com.lianwei</groupId>
<artifactId>com.lianwei</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>war</packaging>
<name>com.lianwei Maven Webapp</name>
<!-- FIXME change it to the project's website -->
<url>http://www.example.com</url>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<maven.compiler.source>1.7</maven.compiler.source>
<maven.compiler.target>1.7</maven.compiler.target>
<mybatis.version>3.2.8</mybatis.version>
<mybatis.spring.version>1.2.2</mybatis.spring.version>
<mybatis-generator.version>1.3.5</mybatis-generator.version>
<mysql.version>5.1.32</mysql.version>
<druid.version>1.0.9</druid.version>
</properties>
<dependencies>
<!-- Mybatis -->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>${mybatis.version}</version>
</dependency>
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>${mybatis.spring.version}</version>
</dependency>
<!-- MySql -->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>${mysql.version}</version>
</dependency>
<!-- 连接池 -->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid</artifactId>
<version>${druid.version}</version>
</dependency>
<!-- https://mvnrepository.com/artifact/log4j/log4j -->
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.17</version>
</dependency>
<!--mybatis懒加载需要cglib-->
<dependency>
<groupId>cglib</groupId>
<artifactId>cglib</artifactId>
<version>3.2.5</version>
</dependency>
<!-- https://mvnrepository.com/artifact/commons-logging/commons-logging -->
<dependency>
<groupId>commons-logging</groupId>
<artifactId>commons-logging</artifactId>
<version>1.1.1</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.11</version>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<finalName>com.lianwei</finalName>
<pluginManagement><!-- lock down plugins versions to avoid using Maven defaults (may be moved to parent pom) -->
<plugins>
<plugin>
<artifactId>maven-clean-plugin</artifactId>
<version>3.1.0</version>
</plugin>
<!-- see http://maven.apache.org/ref/current/maven-core/default-bindings.html#Plugin_bindings_for_war_packaging -->
<plugin>
<artifactId>maven-resources-plugin</artifactId>
<version>3.0.2</version>
</plugin>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.8.0</version>
</plugin>
<plugin>
<artifactId>maven-surefire-plugin</artifactId>
<version>2.22.1</version>
</plugin>
<plugin>
<artifactId>maven-war-plugin</artifactId>
<version>3.2.2</version>
</plugin>
<plugin>
<artifactId>maven-install-plugin</artifactId>
<version>2.5.2</version>
</plugin>
<plugin>
<artifactId>maven-deploy-plugin</artifactId>
<version>2.8.2</version>
</plugin>
</plugins>
</pluginManagement>
<!-- 解决配置文件不拷贝的问题 -->
<resources>
<resource>
<directory>src/main/java</directory>
<includes>
<include>**/*.properties</include>
<include>**/*.xml</include>
</includes>
<filtering>false</filtering>
</resource>
<resource>
<directory>src/main/resources</directory>
<includes>
<include>**/*.properties</include>
<include>**/*.xml</include>
</includes>
<excludes>
<exclude>generatorConfig.xml</exclude>
</excludes>
<filtering>false</filtering>
</resource>
</resources>
</build>
</project>
主要编辑三处内容，<properties>， <dependencies>，<resources>。
随后import changes等待maven引入jar包。
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编译成功
