引入Mybatis配置及纯学习mybatis使用

本文详细介绍如何在Java项目中整合MyBatis与Spring框架,包括Maven项目的依赖配置及纯Java项目的Jar包引入方法。此外,还提供了mybatis-config.xml配置文件与Mapper XML文件的具体配置示例,并通过主函数进行了简单的测试。

第一步:

    引入Mybatis的jar包:两种方式,一种创建Maven项目,一种直接下载Myabtis jar包

    第一种:pom.xml配置

    <dependency>
<groupId>commons-dbcp</groupId>
<artifactId>commons-dbcp</artifactId>
<version>1.4</version>
</dependency>

<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.0.8</version>
</dependency>

<!-- Mybatis3.4.1 -->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>3.4.1</version>
</dependency>

<!-- spring整合mybatis -->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>1.3.0</version>
</dependency>

<!-- Spring-4.2.0 -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>4.2.0.RELEASE</version>
</dependency>

<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-orm</artifactId>
<version>4.2.0.RELEASE</version>
</dependency>

<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-expression</artifactId>
<version>4.2.0.RELEASE</version>
</dependency>

   配置说明:这个配置是mybatis整合spring的。毫无疑问,mysql驱动包是必要,其次将myabtis核心包引入项目中,另外还要将myabtis-spring整合包引入,这是因为mybatis需要整合mybatis,然后引入spring的核心包。

第二种配置:纯学习mybatis的配置:

                  只需要配置mybatis的包就行。

                  步骤如下

                   新建一个纯java项目,在idea下。

                   第一步,将jar包引入项目。

                    ant-1.9.6.jar
                    ant-launcher-1.9.6.jar
                    asm-5.2.jar
                    cglib-3.2.5.jar
                    commons-logging-1.2.jar
                    javassist-3.22.0-GA.jar
                    log4j-1.2.17.jar
                    log4j-api-2.3.jar
                    log4j-core-2.3.jar
                    ognl-3.1.16.jar
                    slf4j-api-1.7.25.jar
                    slf4j-log4j12-1.7.25.jar
                    mybatis-3.4.6.jar      

                    主要配置,mybatis-config.xml,usermapper.xml

                    mybatis-config.xml

<?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>
    <properties resource="com/mybatis/res/jdbc.properties">
    </properties>
    <environments default="development">
        <environment id="development">
            <transactionManager type="JDBC"/>
            <dataSource type="POOLED">
                <property name="driver" value="${jdbc.driver}"/>
                <property name="url" value="${jdbc.url}"/>
                <property name="username" value="${jdbc.username}"/>
                <property name="password" value="${jdbc.password}"/>
            </dataSource>
        </environment>
    </environments>
    <mappers>
        <mapper resource="com/mybatis/mapper/usermapper.xml"></mapper>
    </mappers>
</configuration>
<?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.mybatis.dao.UserDao">
    <select id="select" parameterType="string" resultType="com.mybatis.pojo.User">
        select * from user where username=#{name}
    </select>
    <select id="selectAll" resultType="com.mybatis.pojo.User">
        select * from user
    </select>
</mapper>

main函数测试

 

import com.mybatis.dao.UserDao;
import com.mybatis.pojo.User;
import org.apache.ibatis.annotations.Mapper;
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 org.apache.log4j.Logger;

import java.io.IOException;
import java.io.InputStream;
import java.util.List;


public class Main {

    public static void main(String[] args) {
        Logger logger = Logger.getLogger(Main.class);
        SqlSessionFactory sqlSessionFactory = null;
        String res = "com/mybatis/res/mybatis-config.xml";
        InputStream inputStream;
        try {
            inputStream = Resources.getResourceAsStream(res);
            sqlSessionFactory = new SqlSessionFactoryBuilder().build(inputStream);
            SqlSession sqlSession = sqlSessionFactory.openSession();
            UserDao userDao = sqlSession.getMapper(UserDao.class);
            /*List<User> list = userDao.selectAll();
            logger.debug(list);
            */
            User user = userDao.select("root");
            logger.debug(user);

        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

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