1. 创建一个java项目

  2. 项目名Mybatis1

  3. 导入jar包：mybatis-3.2.8.jar、mysql-connector-java-5.0.7-bin.jar

  4. 创建一个配置文件mybatis_config.xml

<environments default="development">

    <environment id="development">

        <transactionManager type="JDBC"/>

        <dataSource type="POOLED">

            <property name="url" value="jdbc:mysql:///firefly"/>

            <property name="username" value="root"/>

            <property name="password" value="root"/>

        </dataSource>

    </environment>

</environments>

<mappers>

    <mapper resource="com/firefly/mybatis1/domain/userMapper.xml"/>

</mappers>
  1. 创建一个bean

package com.firefly.mybatis1.domain;

public class User {

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;

}

public String toString() {

    return "User [id=" + id + ", name=" + name + ", age=" + age + "]";

}

}

  1. 创建一个与bean对应的xml文件

<select id="getUser" parameterType="int" resultType="com.firefly.mybatis1.domain.User">

    select * from user where id=#{a}

</select>

</select>
  1. 创建 一个测试文件

package com.firefly.mybatis1.test;

import java.io.IOException;

import java.io.InputStream;

import org.apache.ibatis.session.SqlSession;

import org.apache.ibatis.session.SqlSessionFactory;

import org.apache.ibatis.session.SqlSessionFactoryBuilder;

import com.firefly.mybatis1.domain.User;

public class Test {

public static void main(String[] args) throws IOException { 

    InputStream is = Test.class.getClassLoader().getResourceAsStream("mybatis_config.xml");

    SqlSessionFactory sf = new SqlSessionFactoryBuilder().build(is);

    SqlSession session = sf.openSession();

    String statement = "com.firefly.mybatis1.domain.userMapper.getUser"; 

    Integer i = new Integer(1);

    User user = (User) session.selectOne(statement, i);

    System.out.println(user);

}

}

    System.out.println(user);

}

}