MyBatis初探之环境的配置

很早之前就想学习mybatis,据说很多公司都使用这个框架。以前我都使用老掉牙的DBCP，Hibernate感觉太大，现在来学学这个中性的框架。Java实战应用:Mybatis实现单表的增删改 http://www.linuxidc.com/Linux/2014-06/103456.htm[Java][Mybatis]物理分页实现 http://www.linuxidc.com/Linux/2014-04/99889.htmMybatis快速入门教程 http://www.linuxidc.com/Linux/2013-06/85762.htmMybatis的关于批量数据操作的测试 http://www.linuxidc.com/Linux/2012-05/60863.htmMybatis中对List<Object> 对象List的批处理插入操作 http://www.linuxidc.com/Linux/2014-02/96916.htm首先是环境的配置，我使用maven创建项目，pom.xml文件如下<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.bird</groupId>
<artifactId>concursey</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging> <name>concursey</name>
<url>http://maven.apache.org</url> <properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties> <dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>3.8.1</version>
<scope>test</scope>
</dependency> <dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>3.2.7</version>
</dependency>

<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.32</version>
</dependency>
</dependencies>
</project>还得创建一个数据库和对应的一张表做示范，这里就不写了，直接上对应的JavaBeanpackage com.bird.mybatis.bean;public class Users { private int id;
private String name;
private int age; public int getId（） {
return id;
} public void setId（int id） {
this.id = id;
} public String getName（） {
return name;
} public void setName（String name） {
this.name = name;
} public int getAge（） {
return age;
} public void setAge（int age） {
this.age = age;
} @Override
public String toString（） {
return "Users [id=" + id + ", name=" + name + ", age=" + age + "]";
}}然后要给对应的JavaBean创建对应的mapper.xml文件，内容如下<？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="com.bird.mybatis.bean.userMapper">
<！--根据ID获取对应的值 -->
<select id="getUser" parameterType="int" resultType="com.bird.mybatis.bean.Users">
select * from users where id = #{id}
</select>
</mapper>当然还有mybatis的全局文件，conf.xml内容如下<？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>
<！-- development:开发模式 work:工作模式 -->
<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://localhost:3306/mybatis" />
<property name="username" value="root" />
<property name="password" value="root" />
</dataSource>
</environment>
</environments>

<mappers>
<mapper resource="com/bird/mybatis/bean/userMapper.xml" />
</mappers></configuration>最后是测试代码package com.bird.mybatis.bean;import java.io.Reader;import org.apache.ibatis.io.Resources;
import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;public class Test {

public static void main（String[] args） throws Exception {
String resource = "conf.xml";
Reader reader = Resources.getResourceAsReader（resource）;
SqlSessionFactory sessionFactory = new SqlSessionFactoryBuilder（）.build（reader）;
SqlSession session = sessionFactory.openSession（）;
String statement = "com.bird.mybatis.bean.userMapper.getUser";
Users user = session.selectOne（statement, 1）;
System.out.println（user）;
}
}总体来说还是非常简单的。MyBatis 的详细介绍：请点这里
MyBatis 的下载地址：请点这里本文永久更新链接地址