04-Spring 集成MyBatis

版权声明：本文为博主原创文章，未经博主允许不得转载。 https://blog.csdn.net/linzhaoliangyan/article/details/88688792

 * 有问题可以参加Java技术交流群：839366464

 * 创建简单java maven项目，骨架quickstart

    * 添加依赖

<dependencies>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.12</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>4.3.18.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-test</artifactId>
            <version>4.3.18.RELEASE</version>
            <scope>test</scope>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-aspects</artifactId>
            <version>4.3.18.RELEASE</version>
        </dependency>

        <dependency>
            <groupId>org.aspectj</groupId>
            <artifactId>aspectjrt</artifactId>
            <version>1.8.9</version>
        </dependency>

        <dependency>
            <groupId>aopalliance</groupId>
            <artifactId>aopalliance</artifactId>
            <version>1.0</version>
        </dependency>

        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.16</version>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>4.3.18.RELEASE</version>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-tx</artifactId>
            <version>4.3.18.RELEASE</version>
        </dependency>

        <dependency>
            <groupId>com.mchange</groupId>
            <artifactId>c3p0</artifactId>
            <version>0.9.5.2</version>
        </dependency>

        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>3.3.0</version>
        </dependency>
        <!--slf4j-->
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-api</artifactId>
            <version>1.7.25</version>
        </dependency>
        <!--log4j-->
        <dependency>
            <groupId>log4j</groupId>
            <artifactId>log4j</artifactId>
            <version>1.2.17</version>
        </dependency>
        <!--slf4j到log4j-->
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-log4j12</artifactId>
            <version>1.7.25</version>
        </dependency>

        <!--Spring 和 MyBatis链接的jar-->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis-spring</artifactId>
            <version>1.3.2</version>
        </dependency>

    </dependencies>

    * 实体copy之前Mybatis工程

    * Mapper 也是copy之前Mybatis工程

          * 把名字get改成query，比较规范

public interface ClassesService {
    /**
     * 通过班级名字获得班级信息
     * @param cname
     * @return
     */
    public Classes getClassesFromName(String cname);
}

@Service
public class ClassesServiceImpl implements ClassesService {
    @Autowired
    private ClassesMapper mClassesMapper;
    @Override
    public Classes getClassesFromName(String cname) {
        return mClassesMapper.queryClassesFromName(cname);
    }
}

 * copy 数据库配置文件，log4j文件

    *  spring-mybatis配置文件，spring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:context="http://www.springframework.org/schema/context"
       xmlns:aop="http://www.springframework.org/schema/aop"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
       http://www.springframework.org/schema/beans/spring-beans.xsd
       http://www.springframework.org/schema/context
       http://www.springframework.org/schema/context/spring-context.xsd
       http://www.springframework.org/schema/aop
       http://www.springframework.org/schema/aop/spring-aop.xsd">

    <!--配置数据库连接池-->
    <context:property-placeholder location="classpath:dbconfig.properties" file-encoding="utf-8"/>
    <bean id="c3p0" class="com.mchange.v2.c3p0.ComboPooledDataSource" destroy-method="close">
        <property name="jdbcUrl" value="${url}"></property>
        <property name="user" value="${uname}"></property>
        <property name="password" value="${password}"></property>
        <property name="driverClass" value="${driver}"></property>
    </bean>

    <!--构建SqlSessionFactory:由于这里是与Spring结合的选择SqlSessionFactoryBean（里面包含SqlSessionFactory）-->
    <bean id="ssf" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="c3p0"></property>
        <property name="mapperLocations" value="classpath:com/hx/hx02/dao/*.xml"></property>
        <property name="typeAliasesPackage" value="com.hx.hx02.bean"></property>
    </bean>

    <!--扫描mapping文件对应dao文件所在的包-->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="com.hx.hx02.dao"></property>
        <property name="sqlSessionFactoryBeanName" value="ssf"></property>
    </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"
       xmlns:aop="http://www.springframework.org/schema/aop"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
       http://www.springframework.org/schema/beans/spring-beans.xsd
       http://www.springframework.org/schema/context
       http://www.springframework.org/schema/context/spring-context.xsd
       http://www.springframework.org/schema/aop
       http://www.springframework.org/schema/aop/spring-aop.xsd">

    <import resource="classpath:spring-mybatis.xml"></import>

    <context:component-scan base-package="com.hx.hx02.*"></context:component-scan>

</beans>

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration("classpath:spring.xml")
public class SpringTest {
    @Autowired
    private ClassesService mClassesService;

    @Test
    public void test1(){
        Classes classes = mClassesService.getClassesFromName("html");
        System.out.println(classes);
        System.out.println(classes.getTeacher());
        System.out.println(classes.getStudents());
    }
}

<resources>
            <resource>
                <directory>src/main/java</directory>
                <includes>
                    <include>**/*.xml</include>
                </includes>
                <!--默认是true-->
                <!--<filtering>true</filtering>-->
            </resource>
            <resource>
                <directory>src/main/resources</directory>
                <includes>
                    <include>**/*.properties</include>
                    <!--默认是true-->
                    <!--<filtering>true</filtering>-->
                    <include>**/*.xml</include>
                </includes>
            </resource>
        </resources>

<?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>
    <settings>
        <!--开启延迟加载-->
        <setting name="lazyLoadingEnabled" value="false"/>
        <!--关闭积极加载-->
        <setting name="aggressiveLazyLoading" value="true"/>
    </settings>
</configuration>

<property name="configLocation" value="classpath:SqlMapConfig.xml"></property>