五篇教你掌握spring之五:Spring与mybatis的整合以及事务的织入

整合Mybatis

创建依赖

我们需要用到junit，mysql驱动，mybatis，spring-webmvc，spring-jdbc，aspectjweaver

<dependencies>
    <dependency>
        <groupId>junit</groupId>
        <artifactId>junit</artifactId>
        <version>4.12</version>
    </dependency>
    <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
        <version>8.0.22</version>
    </dependency>
    <dependency>
        <groupId>org.mybatis</groupId>
        <artifactId>mybatis</artifactId>
        <version>3.5.2</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-webmvc</artifactId>
        <version>5.2.0.RELEASE</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-jdbc</artifactId>
        <version>5.2.0.RELEASE</version>
    </dependency>
    <dependency>
        <groupId>org.aspectj</groupId>
        <artifactId>aspectjweaver</artifactId>
        <version>1.9.4</version>
    </dependency>
    <dependency>
        <groupId>org.mybatis</groupId>
        <artifactId>mybatis-spring</artifactId>
        <version>2.0.2</version>
    </dependency>
</dependencies>

复习Mybatis

设置maven的静态资源过滤（否则后面会出现找不到mapper.xml）

<build>
    <resources>
        <resource>
            <directory>src/main/java</directory>
            <includes>
                <include>**/*.properties</include>
                <include>**/*.xml</include>
            </includes>
            <filtering>false</filtering>
        </resource>
        <resource>
            <directory>src/main/resources</directory>
            <includes>
                <include>**/*.properties</include>
                <include>**/*.xml</include>
            </includes>
            <filtering>false</filtering>
        </resource>
    </resources>
</build>

新建User实体类（注意：与数据库中user表的字段对应） <pre>package com.lwh.pojo;

public class User {

<!-- --></span>
<span class="token keyword">private</span> <span class="token keyword">int</span> id<span class="token punctuation">;</span>
<span class="token keyword">private</span> <span class="token class-name">String</span> name<span class="token punctuation">;</span>
<span class="token keyword">private</span> <span class="token class-name">String</span> pwd<span class="token punctuation">;</span>

<span class="token keyword">public</span> <span class="token keyword">int</span> <span class="token function">getId</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{ 
<!-- --></span>
    <span class="token keyword">return</span> id<span class="token punctuation">;</span>
<span class="token punctuation">}</span>

<span class="token keyword">public</span> <span class="token keyword">void</span> <span class="token function">setId</span><span class="token punctuation">(</span><span class="token keyword">int</span> id<span class="token punctuation">)</span> <span class="token punctuation">{ 
<!-- --></span>
    <span class="token keyword">this</span><span class="token punctuation">.</span>id <span class="token operator">=</span> id<span class="token punctuation">;</span>
<span class="token punctuation">}</span>

<span class="token keyword">public</span> <span class="token class-name">String</span> <span class="token function">getName</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{ 
<!-- --></span>
    <span class="token keyword">return</span> name<span class="token punctuation">;</span>
<span class="token punctuation">}</span>

<span class="token keyword">public</span> <span class="token keyword">void</span> <span class="token function">setName</span><span class="token punctuation">(</span><span class="token class-name">String</span> name<span class="token punctuation">)</span> <span class="token punctuation">{ 
<!-- --></span>
    <span class="token keyword">this</span><span class="token punctuation">.</span>name <span class="token operator">=</span> name<span class="token punctuation">;</span>
<span class="token punctuation">}</span>

<span class="token keyword">public</span> <span class="token class-name">String</span> <span class="token function">getPwd</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{ 
<!-- --></span>
    <span class="token keyword">return</span> pwd<span class="token punctuation">;</span>
<span class="token punctuation">}</span>

<span class="token keyword">public</span> <span class="token keyword">void</span> <span class="token function">setPwd</span><span class="token punctuation">(</span><span class="token class-name">String</span> pwd<span class="token punctuation">)</span> <span class="token punctuation">{ 
<!-- --></span>
    <span class="token keyword">this</span><span class="token punctuation">.</span>pwd <span class="token operator">=</span> pwd<span class="token punctuation">;</span>
<span class="token punctuation">}</span>

<span class="token annotation punctuation">@Override</span>
<span class="token keyword">public</span> <span class="token class-name">String</span> <span class="token function">toString</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{ 
<!-- --></span>
    <span class="token keyword">return</span> <span class="token string">"User{"</span> <span class="token operator">+</span>
            <span class="token string">"id="</span> <span class="token operator">+</span> id <span class="token operator">+</span>
            <span class="token string">", name='"</span> <span class="token operator">+</span> name <span class="token operator">+</span> <span class="token string">'\''</span> <span class="token operator">+</span>
            <span class="token string">", pwd='"</span> <span class="token operator">+</span> pwd <span class="token operator">+</span> <span class="token string">'\''</span> <span class="token operator">+</span>
            <span class="token string">'}'</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span>

}

新建一个UserMapper接口 <pre>package com.lwh.mapper;

import com.lwh.pojo.User;

import java.util.List;

public interface UserMapper {

<!-- --></span>
<span class="token keyword">public</span> <span class="token class-name">List</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">User</span><span class="token punctuation">&gt;</span></span> <span class="token function">selectUser</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>

}

编写UserMapper.xml <?xml version="1.0" encoding="UTF-8" ?> <!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Config 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">

<mapper namespace="com.lwh.mapper.UserMapper">

<select id="selectUser" resultType="User">
    select * from user;
</select>

</mapper>

编写mybatis的配置文件mybatis-config.xml，并且绑定UserMapper.xml（切记） <?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>


<!--设置别名-->
<typeAliases>
    <package name="com.lwh.pojo"/>
</typeAliases>

<environments default="development">
    <environment id="development">
        <transactionManager type="JDBC"/>
        <dataSource type="POOLED">
            <property name="driver" value="com.mysql.cj.jdbc.Driver"/>
            <property name="url" value="jdbc:mysql://localhost:3306/mybatis?serverTimezone=Asia/Shanghai"/>
            <property name="username" value="root"/>
            <property name="password" value="123456"/>
        </dataSource>
    </environment>
</environments>
<!--每一个xml都要注册-->
<mappers>
    <mapper resource="com/lwh/mapper/UserMapper.xml"/>
</mappers>

</configuration>

编写测试类 <pre>@org.junit.Test public void t1() throws IOException {

<!-- --></span>
<span class="token class-name">String</span> resources<span class="token operator">=</span><span class="token string">"mybatis-config.xml"</span><span class="token punctuation">;</span>
<span class="token class-name">InputStream</span> asStream <span class="token operator">=</span> <span class="token class-name">Resources</span><span class="token punctuation">.</span><span class="token function">getResourceAsStream</span><span class="token punctuation">(</span>resources<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token class-name">SqlSessionFactory</span> sqlSessionFactory<span class="token operator">=</span><span class="token keyword">new</span> <span class="token class-name">SqlSessionFactoryBuilder</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">build</span><span class="token punctuation">(</span>asStream<span class="token punctuation">)</span><span class="token punctuation">;</span>

<span class="token class-name">SqlSession</span> sqlSession <span class="token operator">=</span> sqlSessionFactory<span class="token punctuation">.</span><span class="token function">openSession</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token class-name">UserMapper</span> mapper <span class="token operator">=</span> sqlSession<span class="token punctuation">.</span><span class="token function">getMapper</span><span class="token punctuation">(</span><span class="token class-name">UserMapper</span><span class="token punctuation">.</span><span class="token keyword">class</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token class-name">List</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">User</span><span class="token punctuation">&gt;</span></span> users <span class="token operator">=</span> mapper<span class="token punctuation">.</span><span class="token function">selectUser</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">for</span> <span class="token punctuation">(</span><span class="token class-name">User</span> user <span class="token operator">:</span> users<span class="token punctuation">)</span> <span class="token punctuation">{ 
<!-- --></span>
    <span class="token class-name">System</span><span class="token punctuation">.</span>out<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span>user<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span>
<span class="token comment">/**输出： * User{id=1, name='a', pwd='12345'} * User{id=2, name='b', pwd='123455'} */</span>
sqlSession<span class="token punctuation">.</span><span class="token function">close</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>

}

`逐步整合Spring与mybatis`

Spring的宗旨在于将对象的创建和管理交给框架，我们要用的时候直接进去拿就是了，所以在Mybatis中多次出现的new关键字是不被允许的，所以MyBatis的所有关键对象的操作，全部交给spring来做，说白了，也就是bean的配置

`方式一`

`在Spring配置文件中编写数据源配置`

<!--配置数据源，使用spring的数据源替换mybatis的配置，使用的就是Spring框架提供的JDBC，这就是为什么我们之前要导入spring-jdbc的原因-->
<bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
    <property name="driverClassName" value="com.mysql.cj.jdbc.Driver"/>
    <property name="url" value="jdbc:mysql://localhost:3306/mybatis?serverTimezone=Asia/Shanghai"/>
    <property name="username" value="root"/>
    <property name="password" value="123456"/>
</bean>

<!--创建SqlSessionFactory-->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
    <property name="dataSource" ref="dataSource"/>
    <!--绑定mybatis的配置文件-->
    <!--这句话就代表这个sqlSessionFactory已经和spring和它自己的配置文件连起来了-->
    <property name="configLocation" value="classpath:mybatis-config.xml"/>
    <!--这句话代表绑定mapper，这样mybatis 的配置文件中就不需要绑定mapper了-->
    <property name="mapperLocations" value="classpath:com/lwh/mapper/*.xml"/>
</bean>

<!--创建sqlSessionTemplate也就是我们在mybatis中用到的SqlSession-->
<bean id="sqlSession" class="org.mybatis.spring.SqlSessionTemplate">
    <!--只能通过构造器赋值，查看源码可以看见SqlSessionTemplate中有一个有参构造器，而且需要传入SqlSessionFactory-->
    <constructor-arg index="0" ref="sqlSessionFactory"/>
</bean>

package com.lwh.mapper;

import com.lwh.pojo.User;
import org.mybatis.spring.SqlSessionTemplate;

import java.util.List;

public class UserMapperImpl implements UserMapper{ 

    private SqlSessionTemplate sqlSession;

    //给spring一个注入的接口set方法
    public void setSqlSession(SqlSessionTemplate sqlSession) { 
        this.sqlSession = sqlSession;
    }

    @Override
    public List<User> selectUser() { 
        UserMapper mapper=sqlSession.getMapper(UserMapper.class);
        return mapper.selectUser();
    }
}

再将这个类送给Spring 进行托管

<!--Spring托管实现类-->
<bean id="userMapper" class="com.lwh.mapper.UserMapperImpl">
    <property name="sqlSession" ref="sqlSession"/>
</bean>

@org.junit.Test
    public void t1() throws IOException { 
        ApplicationContext context = new ClassPathXmlApplicationContext("SpringApplication.xml");
        UserMapper userMapper = context.getBean("userMapper", UserMapper.class);
        List<User> users = userMapper.selectUser();
        for (User user : users) { 
            System.out.println(user);
        }
        /** * User{id=1, name='a', pwd='12345'} * User{id=2, name='b', pwd='123455'} */
    }

`方式二（在方式一的基础上精简了一些)`

前两部相同，第三步我们可以不用将SqlSession交给Spring托管，也就是不用配置sqlsession的bean，直接写实现类

`UserMapperImpl2`

package com.lwh.mapper;

import com.lwh.pojo.User;
import org.mybatis.spring.SqlSessionTemplate;
import org.mybatis.spring.support.SqlSessionDaoSupport;

import java.util.List;

public class UserMapperImpl2 extends SqlSessionDaoSupport implements UserMapper { 

    /** * SqlSessionDaoSupport这个父类，已经帮我们实现了sqlsesion的获取 * 但是SqlSessionDaoSupport这个父类仍然要获取SqlSessionFactory这个对象，所以SqlSessionFactory的创建是必不可少的 * @return */
    @Override
    public List<User> selectUser() { 
        return getSqlSession().getMapper(UserMapper.class).selectUser();
    }
}

`将这个实现类交给Spring去托管`

<!--Spring托管方式二的实现类-->
<bean id="userMapper2" class="com.lwh.mapper.UserMapperImpl2">
    <property name="sqlSessionFactory" ref="sqlSessionFactory"/>
</bean>

`测试`

@org.junit.Test
public void t2(){ 
    ApplicationContext context = new ClassPathXmlApplicationContext("SpringApplication.xml");
    UserMapper userMapper2 = context.getBean("userMapper2", UserMapper.class);
    for (User user : userMapper2.selectUser()) { 
        System.out.println(user);
    }
    /** * 输出： * User{id=1, name='a', pwd='12345'} * User{id=2, name='b', pwd='123455'} */
}

`声明式事务`

事务：

要么都成功，要么都失败
事务在项目开发中，十分重要，涉及到数据的一致性问题
保证完整性和一致性

事务ACID原则

原子性
一致性
隔离性

  - 多个业务可能操作同一个资源，防止数据被损坏 
 持久性
  - 事务一旦提交，将写入物理文件，持久化保存数据 
 例如
编写pojo类
package com.lwh.pojo;

public class User { 
    private int id;
    private String name;
    private String pwd;

    public User(){ 

    }
    public User(int id, String name, String pwd) { 
        this.id = id;
        this.name = name;
        this.pwd = pwd;
    }

    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 getPwd() { 
        return pwd;
    }

    public void setPwd(String pwd) { 
        this.pwd = pwd;
    }

    @Override
    public String toString() { 
        return "User{" +
                "id=" + id +
                ", name='" + name + '\'' +
                ", pwd='" + pwd + '\'' +
                '}';
    }
}
导入maven依赖
<dependencies>
    <dependency>
        <groupId>junit</groupId>
        <artifactId>junit</artifactId>
        <version>4.12</version>
    </dependency>
    <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
        <version>8.0.22</version>
    </dependency>
    <dependency>
        <groupId>org.mybatis</groupId>
        <artifactId>mybatis</artifactId>
        <version>3.5.2</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-webmvc</artifactId>
        <version>5.2.0.RELEASE</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-jdbc</artifactId>
        <version>5.2.0.RELEASE</version>
    </dependency>
    <dependency>
        <groupId>org.aspectj</groupId>
        <artifactId>aspectjweaver</artifactId>
        <version>1.9.4</version>
    </dependency>
    <dependency>
        <groupId>org.mybatis</groupId>
        <artifactId>mybatis-spring</artifactId>
        <version>2.0.2</version>
    </dependency>
</dependencies>

<build>
    <resources>
        <resource>
            <directory>src/main/java</directory>
            <includes>
                <include>**/*.properties</include>
                <include>**/*.xml</include>
            </includes>
            <filtering>false</filtering>
        </resource>
        <resource>
            <directory>src/main/resources</directory>
            <includes>
                <include>**/*.properties</include>
                <include>**/*.xml</include>
            </includes>
            <filtering>false</filtering>
        </resource>
    </resources>
</build>
编写Spring与mybatis整合的配置文件Spring-dao.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:aop="http://www.springframework.org/schema/aop" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.1.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.1.xsd">

    <!--配置数据源，使用spring的数据源替换mybatis的配置，使用的就是Spring框架提供的JDBC，这就是为什么我们之前要导入spring-jdbc的原因-->
    <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
        <property name="driverClassName" value="com.mysql.cj.jdbc.Driver"/>
        <property name="url" value="jdbc:mysql://localhost:3306/mybatis?serverTimezone=Asia/Shanghai"/>
        <property name="username" value="root"/>
        <property name="password" value="123456"/>
    </bean>

    <!--创建SqlSessionFactory-->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource"/>
        <!--绑定mybatis的配置文件-->
        <!--这句话就代表这个sqlSessionFactory已经和spring和它自己的配置文件连起来了-->
        <property name="configLocation" value="classpath:mybatis-config.xml"/>
        <!--这句话代表绑定mapper，这样mybatis 的配置文件中就不需要绑定mapper了-->
        <property name="mapperLocations" value="classpath:com/lwh/mapper/*.xml"/>
    </bean>

    <!--创建sqlSessionTemplate也就是我们在mybatis中用到的SqlSession，这一步在第二种实现方法中可以省略！！！-->
    <bean id="sqlSession" class="org.mybatis.spring.SqlSessionTemplate">
        <!--只能通过构造器赋值，查看源码可以看见SqlSessionTemplate中有一个有参构造器，而且需要传入SqlSessionFactory-->
        <constructor-arg index="0" ref="sqlSessionFactory"/>
    </bean>

</beans>
编写SpringApplicationbean配置文件
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:aop="http://www.springframework.org/schema/aop" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.1.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.1.xsd">
    <import resource="Spring-dao.xml"/>
    <bean id="userMapperImpl" class="com.lwh.mapper.UserMapperImpl">
        <property name="sqlSession" ref="sqlSession"/>
    </bean>
</beans>
写UserMapper接口
package com.lwh.mapper;

import com.lwh.pojo.User;

import java.util.List;

public interface UserMapper { 
    //增加
    public void add(User user);
    //删除
    public void delete(int id);
    //修改
    public void update(User user);
    //查
    public List<User> query();

}
编写UserMapper.xml
注意！这里有一个错误，“deletes”！为了测试需要，我们需要知道没有配置事务的时候执行错误会怎么样
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Config 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.lwh.mapper.UserMapper">

    <select id="query" resultType="User">
        select * from user;
    </select>

    <insert id="add" parameterType="User">
        insert into user(id,name,pwd) values (#{id},#{name},#{pwd})
    </insert>

    <delete id="delete" parameterType="int">
        deletes from user where id=#{id}
    </delete>
</mapper>
编写Mybatis-config配置文件
<?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>

    <typeAliases>
        <package name="com.lwh.pojo"/>
    </typeAliases>
</configuration>
编写UserMapperImpl
package com.lwh.mapper;

import com.lwh.pojo.User;
import org.mybatis.spring.SqlSessionTemplate;

import java.util.List;

public class UserMapperImpl implements UserMapper{ 

    private SqlSessionTemplate sqlSession;

    //给spring一个注入的接口set方法
    public void setSqlSession(SqlSessionTemplate sqlSession) { 
        this.sqlSession = sqlSession;
    }

    @Override
    public void add(User user) { 

        UserMapper mapper = sqlSession.getMapper(UserMapper.class);

        mapper.add(user);

        mapper.delete(3);
    }

    @Override
    public void delete(int id) { 

    }

    @Override
    public void update(User user) { 

    }

    @Override
    public List<User> query() { 
        return null;
    }
}
编写测试类
数据库原来有id为1，2的两个人，我要往其中插入一个id为3的人，然后再删除他
import com.lwh.mapper.UserMapper;
import com.lwh.mapper.UserMapperImpl;
import com.lwh.pojo.User;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class Test { 

    @org.junit.Test
    public void t1(){ 
        ApplicationContext context = new ClassPathXmlApplicationContext("SpringApplication.xml");
        UserMapper userMapperImpl = context.getBean("userMapperImpl", UserMapper.class);
        userMapperImpl.add(new User(3,"李华","12345"));
    }
}
结果分析
果不其然，报了一个错误
You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ‘deletes from user where id=3’ at line 1
因为我的delete语句写错了，所以报了这个错，我们希望的是这一个方法执行后，如果其中有错误，那么其它对数据库进行的操作也需要失效，要符合一致性，不能半正确一般错误，这样很显然不合理，那么我们需要在Spring中进行事务的声明
我们对代码做出修改
修改Spring-dao.xml,增加如下代码
<!--结合AOP实现事务的织入-->
<!--配置事务的通知-->
<tx:advice id="txAdvice" transaction-manager="transationManager">
    <tx:attributes>
        <!--propagation表示事务的传播性-->
        <tx:method name="add" propagation="REQUIRED"/>
        <tx:method name="delete" propagation="REQUIRED"/>
        <tx:method name="update" propagation="REQUIRED"/>
        <tx:method name="query" propagation="REQUIRED"/>
        <!--一般只需要配置以下语句，示例代码表示可以配置某个方法-->
        <tx:method name="*" propagation="REQUIRED"/>
    </tx:attributes>
</tx:advice>

<aop:config>
    <aop:pointcut id="txPointCut" expression="execution(* com.lwh.mapper.*.*(..))"/>
    <aop:advisor advice-ref="txAdvice" pointcut-ref="txPointCut"/>
</aop:config>
直接测试即可，发现删除错误后不再有id为3的记录出现！事务织入成功！ 祝您学习愉快！共同进步~
    
  本文为互联网自动采集或经作者授权后发布，本文观点不代表立场，若侵权下架请联系我们删帖处理！文章出自：https://blog.csdn.net/m0_46435741/article/details/119277627

整合Mybatis

复习Mybatis

逐步整合Spring与mybatis

方式一

在Spring配置文件中编写数据源配置

方式二（在方式一的基础上精简了一些)

UserMapperImpl2

将这个实现类交给Spring去托管

测试

声明式事务

编写pojo类

导入maven依赖

编写Spring与mybatis整合的配置文件Spring-dao.xml

编写SpringApplicationbean配置文件

写UserMapper接口

编写UserMapper.xml

编写Mybatis-config配置文件

编写UserMapperImpl

编写测试类

结果分析

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