MyBatis 基本构成与框架搭建

<?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>
    <!-- 实体类别名，对应映射文件中的resultType -->
    <typeAliases>
        <typeAlias alias="message" type="SQLDao.MessageModel"/>
    </typeAliases>

    <!-- 数据库连接配置，配置连接字符串、用户名、密码或缓存、懒加载、语句执行超时时间等这里目前只配置了基本的数据库连接属性 -->
    <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/testdb" />
                <property name="username" value="root" />
                <property name="password" value="root" />
            </dataSource>
        </environment>
    </environments>

    <!-- 实体与数据库表映射文件位置，配置后MyBatis才会找到并加载上 -->
    <mappers>
        <mapper resource="message.xml" />
    </mappers>
</configuration>

package SQLDao;

public class MessageModel {
    public int CarID;
    public int postionX;
    public int postionY;
    public int speed;

    public int getCarID() {
        return CarID;
    }

    public void setCarID(int carID) {
        CarID = carID;
    }

    public int getPostionX() {
        return postionX;
    }

    public void setPostionX(int postionX) {
        this.postionX = postionX;
    }

    public int getPostionY() {
        return postionY;
    }

    public void setPostionY(int postionY) {
        this.postionY = postionY;
    }

    public int getSpeed() {
        return speed;
    }

    public void setSpeed(int speed) {
        this.speed = speed;
    }
}

package SQLDao;

public interface SQLHandle {
    public int addhistory(MessageModel model);
}

package SQLDao;

import org.apache.ibatis.io.Resources;
import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;

import java.io.IOException;
import java.io.Reader;

public class TestSQL {
    /**
     * SqlSessionFactory是用来创建SqlSession的工厂，SqlSession会执行映射的语句，进行事物提交、回滚等。
     *
     * @return
     */
    public static SqlSessionFactory getSqlSessionFactory() {
        Reader reader = null;
        SqlSessionFactory sqlSessionFactory = null;
        try {
            reader = Resources.getResourceAsReader("mybatis-configure.xml");
            sqlSessionFactory = new SqlSessionFactoryBuilder().build(reader);
        } catch (IOException e) {
            e.printStackTrace();
        }
        return sqlSessionFactory;
    }


    public static void selectUserByID() {
        // 得到SqlSession实例，便于执行增删改查、事务提交回滚等操作。
        SqlSession session = getSqlSessionFactory().openSession();
        MessageModel messageModel = new MessageModel();
        messageModel.setCarID(1);
        messageModel.setPostionX(2);
        messageModel.setPostionY(3);
        messageModel.setSpeed(4);
        try {
            SQLHandle handle=session.getMapper(SQLHandle.class);
            handle.addhistory(messageModel);
        } finally {
            session.close();
        }
    }

    public static void main(String[] args)  {
        selectUserByID();
    }
}