以下是我学习Mybatis3时的第一个例子，本人非专业人员，基础薄弱。

一、导入数据库文件

1、创建 mybatis-config.xml文件，注意：此处测试时用的 Sql Server 2012

2、创建 User 类

3、创建 Usermapper.xml文件

4、创建 TestUser类

代码如下： mybatis-config.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE configurationPUBLIC "-//mybatis.org//DTD Config 3.0//EN""http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration><environments default="standalone"><environment id="standalone"><transactionManager type="JDBC" /><dataSource type="UNPOOLED"><property name="driver" value="com.microsoft.sqlserver.jdbc.SQLServerDriver"/><property name="url" value="jdbc:sqlserver://localhost:1433;DatabaseName=hib"/><property name="username" value="sa"/><property name="password" value="novell"/></dataSource></environment></environments><mappers><mapper resource="mybatis/Model/UserMapper.xml"/>  </mappers>
</configuration>

User.java

package mybatis.Model;public class User {private int id;private String name;private String password;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 String getPassword() {return password;}public void setPassword(String password) {this.password = password;}
}

UserMapperUsermapper.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="UserMapper"><select id="id" parameterType="int" resultType="mybatis.Model.User"> <!-- resultType 类型为对应该实体类  id为传入的参数-->select * from t_user where id = #{id}</select>
</mapper>

TestUser.java

package Testmybatis.odel;import java.io.IOException;
import java.io.Reader;import mybatis.Model.User;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 TestUser {public static void main(String[] args) throws IOException{String resource = "mybatis-config.xml";Reader reader = Resources.getResourceAsReader(resource);//InputStream inputStream = Resources.getResourceAsStream(resource);SqlSessionFactory sessionFactory = new SqlSessionFactoryBuilder().build(reader);SqlSession session = sessionFactory.openSession();try {User user = (User)session.selectOne("id", "1");System.out.println("username:" + user.getName());} catch (Exception e) {e.printStackTrace();} finally {session.close();}}}

此处下载 myeclipse 导出工程 包括数据库在内~~~~