详解Spring与MyBatis的整合的方法

目录

• 一、问题提出
• 二、解决方案
• 三、MyBatis逆向工程
• pom文件
• generatorConfig.xml
• 四、Spring与mybatis的配置文件
• 主模块依赖jar包
• spring-persist-mybatis.xml
• 文件目录
• 五、测试
• 六、总结
• 总结

一、问题提出

mybatis是根据mapper.xml文件动态生成mapper接口的实现类，按照Spring的常规组件扫描的方式不能添加到IOC容器中，需要做出相应的配置

二、解决方案

图片摘自尚硅谷尚筹网项目文档。

如图可知，需要在Spring和mybatis整合的配置文件中配置

• 启动Spring组件扫描
• 数据源
• SqlsessionFactoryBean
• MapperScannerConfigurer

三、MyBatis逆向工程

pom文件

    <dependencies>
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>3.5.9</version>
        </dependency>
    </dependencies>
    <!-- 控制maven在构建过程中的配置 -->
    <build>
        <!--构建过程中用到的插件-->
        <plugins>
            <plugin>
                <groupId>org.mybatis.generator</groupId>
                <artifactId>mybatis-generator-maven-plugin</artifactId>
                <version>1.4.1</version>
                <!--插件用的依赖-->
                <dependencies>
                    <dependency>
                        <groupId>org.mybatis.generator</groupId>
                        <artifactId>mybatis-generator-core</artifactId>
                        <version>1.4.1</version>
                    </dependency>
                    <dependency>
                        <groupId>com.mchange</groupId>
                        <artifactId>c3p0</artifactId>
                        <version>0.9.5.5</version>
                    </dependency>
                    <dependency>
                        <groupId>mysql</groupId>
                        <artifactId>mysql-connector-java</artifactId>
                        <version>8.0.25</version>
                    </dependency>
                </dependencies>
            </plugin>
        </plugins>
    </build>

generatorConfig.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE generatorConfiguration
        PUBLIC "-//mybatis.org//DTD MyBatis Generator Configuration 1.0//EN"
        "http://mybatis.org/dtd/mybatis-generator-config_1_0.dtd">
<generatorConfiguration>
    <!--mybatis generator:generate -->
    <context id="wdhTables" targetRuntime="MyBatis3">
        <commentGenerator>
            <!--是否去除自动生成的注释 true:是 ;false:否 -->
            <property name="suppressAllComments" value="ture" />
        </commentGenerator>
        <!--数据库连接的信息：驱动类、连接地址、用户名、密码 -->
        <jdbcConnection
                driverClass="com.mysql.cj.jdbc.Driver"
                connectionURL="jdbc:mysql://localhost:3306/mbook"
                userId="root"
                password="123456">
        </jdbcConnection>
        <!--
        默认 false，把 JDBC DECIMAL 和 NUMERIC 类型解析为 Integer，为 true时把
        JDBC DECIMAL
        和 NUMERIC 类型解析为 java.math.BigDecimal -->
        <javaTypeResolver>
            <property name="forceBigDecimals" value="false" />
        </javaTypeResolver>
        <!--targetProject:生成 Entity类的路径 -->
        <javaModelGenerator targetProject=".\src\main\java"
                            targetPackage="com.wdh.entity">
            <!--enableSubPackages:是否让 schema作为包的后缀 -->
            <property name="enableSubPackages" value="false" />
            <!--从数据库返回的值被清理前后的空格 -->
            <property name="trimStrings" value="true" />
        </javaModelGenerator>
        <!--targetProject:XxxMapper.xml映射文件生成的路径 -->
        <sqlMapGenerator targetProject=".\src\main\java"
                         targetPackage="com.wdh.mapper">
            <!--enableSubPackages:是否让 schema作为包的后缀 -->
            <property name="enableSubPackages" value="false" />
        </sqlMapGenerator>
        <!--targetPackage Mapper接口生成的位置 -->
        <javaClientGenerator type="XMLMAPPER"
                             targetProject=".\src\main\java"
                             targetPackage="com.wdh.mapper">
            <!--enableSubPackages:是否让 schema作为包的后缀 -->
            <property name="enableSubPackages" value="false" />
        </javaClientGenerator>
        <!-- 数据库表名字和我们的 entity类对应的映射指定 -->
        <table tableName="login" domainObjectName="Login" />
    </context>
</generatorConfiguration>

生成结果：

把生成的文件移动到对应的工程文件中

四、Spring与mybatis的配置文件

主模块依赖jar包

<dependencies>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-orm</artifactId>
            <version>5.3.16</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>5.3.16</version>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>8.0.25</version>
        </dependency>
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>3.5.9</version>
        </dependency>
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
            <version>1.2.8</version>
        </dependency>
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis-spring</artifactId>
            <version>2.0.7</version>
        </dependency>
    </dependencies>

spring-persist-mybatis.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:context="http://www.springframework.org/schema/context"       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd">    <!--启动组件扫描-->    <context:component-scan base-package="com.wdh"/>    <!--引用jdbc.properties文件-->    <context:property-placeholder location="classpath:jdbc.properties"/>    <!--配置druid数据源-->    <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource">        <property name="username" value="${jdbc.username}"/>        <property name="password" value="${jdbc.password}"/>        <property name="url" value="${jdbc.url}"/>        <!--注意这里是dirverClassName-->        <property name="driverClassName" value="${jdbc.driver}"/>    </bean>    <!--配置SqlSessionFactoryBean-->    <bean id="sqlSessionFactoryBean" class="org.mybatis.spring.SqlSessionFactoryBean">        <!--配置数据源-->        <property name="dataSource" ref="dataSource"/>        <!--配置mybatis-config文件位置-->        <property name="configLocation" value="classpath:mybatis/mybatis-config.xml"/>        <!--配置mapper映射文件位置-->        <property name="mapperLocations" value="classpath:mybatis/mapper/*Mapper.xml"/>    </bean>    <!--配置MapperScannerConfigurer-->    <bean id="mapperScannerConfigurer" class="org.mybatis.spring.mapper.MapperScannerConfigurer">        <!--配置要扫描的包-->        <property name="basePackage" value="com.wdh.mapper"/>    </bean></beans><?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:context="http://www.springframework.org/schema/context"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd">
    <!--启动组件扫描-->
    <context:component-scan base-package="com.wdh"/>
    <!--引用jdbc.properties文件-->
    <context:property-placeholder location="classpath:jdbc.properties"/>
    <!--配置druid数据源-->
    <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource">
        <property name="username" value="${jdbc.username}"/>
        <property name="password" value="${jdbc.password}"/>
        <property name="url" value="${jdbc.url}"/>
        <!--注意这里是dirverClassName-->
        <property name="driverClassName" value="${jdbc.driver}"/>
    </bean>
    <!--配置SqlSessionFactoryBean-->
    <bean id="sqlSessionFactoryBean" class="org.mybatis.spring.SqlSessionFactoryBean">
        <!--配置数据源-->
        <property name="dataSource" ref="dataSource"/>
        <!--配置mybatis-config文件位置-->
        <property name="configLocation" value="classpath:mybatis/mybatis-config.xml"/>
        <!--配置mapper映射文件位置-->
        <property name="mapperLocations" value="classpath:mybatis/mapper/*Mapper.xml"/>
    </bean>
    <!--配置MapperScannerConfigurer-->
    <bean id="mapperScannerConfigurer" class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <!--配置要扫描的包-->
        <property name="basePackage" value="com.wdh.mapper"/>
    </bean>
</beans>

文件目录

五、测试

//junit与Spring整合
@RunWith(SpringJUnit4ClassRunner.class)
//加载Spring配置文件
@ContextConfiguration(locations = {"classpath:spring-persist-mybatis.xml"})
public class DataSourceTest {
    @Autowired
    private DataSource dataSource;
    @Autowired
    private LoginMapper loginMapper;
    @Test
    public void connTest() throws SQLException {
        System.out.println(dataSource.getConnection());
    }
    @Test
    public void insertTest(){
        Login login = new Login(2, "wdh", "123", false);
        int i = loginMapper.insert(login);
        System.out.println("受影响的行数："+ i);
    }
}

 结果：

六、总结

总结

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