Mybatis 框架搭建封装JDBC，实现sql语句

news2025/1/23 22:30:56

1、maven新建一个工程编辑

2、添加POM.XML配置文件

3、创建实例包

4、创建一个环境资源根目录

5、配置环境文件

6、创建接口，添加方法

7、编写sql语句

8、创建测试类

8.1 、定义工厂模式

8.2 、定义会话

8.3、定义对象

8.5、获取Builder建造工厂

8.6、通过建造工厂建造SqlSessionFactory

8.7、创建Session会话

8.8、获取Session会话的执行者

8.9、提交和释放资源

9、通过mysbatis实现sql语句

9.1、insert：

9.2、update

9.3、 delete

1、maven新建一个工程

2、添加POM.XML配置文件

	<dependency>
			<groupId>mysql</groupId>
			<artifactId>mysql-connector-java</artifactId>
			<version>8.0.29</version>
		</dependency>
		<dependency>
			<groupId>com.oracle.database.jdbc</groupId>
			<artifactId>ojdbc6</artifactId>
			<version>11.2.0.4</version>
		</dependency>
		<dependency>
			<groupId>org.mybatis</groupId>
			<artifactId>mybatis</artifactId>
			<version>3.2.2</version>
		</dependency>

3、创建实例包

4、创建一个环境资源根目录

补充好mybatis-config.xml内容

<?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="database.properties"></properties>

    <typeAliases>
        <package name="nj.zb.kb21.pojo"/>
    </typeAliases>

    <environments default="mysqlDev">
        <environment id="mysqlDev">
            <transactionManager type="JDBC"></transactionManager>
            <dataSource type="POOLED">
                <property name="driver" value="${mysqldriver}"/>
                <property name="url" value="${mysqlurl}"/>
                <property name="username" value="${mysqluser}"/>
                <property name="password" value="${mysqlpwd}"/>

            </dataSource>
        </environment>
    </environments>


    <mappers>
        <mapper resource="nj/zb/kb21/dao/DogDao.xml"/>
        <mapper resource="nj/zb/kb21/dao/MasterDao.xml"/>
    </mappers>
</configuration>

创建一个xml文件，Mapper里面要添加进去，上面代码已经创了以下两个

<mapper resource="nj/zb/kb21/dao/DogDao.xml"/>
<mapper resource="nj/zb/kb21/dao/MasterDao.xml"/>

5、配置环境文件

只需添加以下内容，insert和update为后面接口实现sql语句

<?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="nj.zb.kb21.dao.DogDao">

</mapper>

6、创建接口，添加方法

7、编写sql语句

以下图为表结构

insert 添加语句

添加一个

<insert id="save">
        insert into dog(name, health, love, strain, lytm)
        values (#{name}, #{health}, #{love}, #{strain}, now())
    </insert>

批量添加

  <sql id="tableName">dog</sql>
    <insert id="batchAdd">
        insert into
        <include refid="tableName"/>
        -- insert into dog(name,health,love,strain,lytm)
        values
        <foreach collection="list" item="dog" separator=",">
            (null,#{dog.name},#{dog.health},#{dog.love},#{dog.strain},now())
        </foreach>
    </insert>

update修改语句

修改一个

 <update id="update">
        update dog
        set name=#{name},
            health=#{health}
        where id = #{id}
    </update>

批量修改

    <update id="batchUpdate">

        <foreach collection="list" item="dog" separator=";">
            update
            <include refid="tableName"/>
            <set>
                <if test="dog.name!=null and dog.name!='' ">
                    name=#{dog.name},
                </if>
                <if test="dog.health!=null">
                    health=#{dog.health},
                </if>
                <if test="dog.love!=null">
                    love=#{dog.love},
                </if>
                <if test="dog.strain!=null and dog.strain!='' ">
                    strain=#{dog.strain},
                </if>
            </set>
            where id=#{dog.id}
        </foreach>
    </update>

delete删除语句

删除一条

 <delete id="Delete">
        delete
        from dog
        where id = #{id}
    </delete>

批量删除

<delete id="batchDelete">
        delete from dog where id in
        <foreach collection="list" item="id" open="(" close=")" separator=",">
            #{id}
        </foreach>
    </delete>