Spring整合Mybatis实现用户的CRUD

创建Maven工程, 并添加依赖

XML 复制代码

    <properties>
        <maven.compiler.source>17</maven.compiler.source>
        <maven.compiler.target>17</maven.compiler.target>
        <maven.compiler.compilerVersion>17</maven.compiler.compilerVersion>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>

        <!-- 支持 JDK 17 的 Spring 版本 -->
        <spring.version>5.3.31</spring.version>
    </properties>

    <dependencies>
        <!-- junit 单元测试 -->
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.13.2</version>
            <scope>test</scope>
        </dependency>

        <!-- Spring -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-test</artifactId>
            <version>${spring.version}</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>${spring.version}</version>
        </dependency>

        <!-- AOP + 事务（必须升级适配 JDK17）-->
        <dependency>
            <groupId>org.aspectj</groupId>
            <artifactId>aspectjweaver</artifactId>
            <version>1.9.19</version>
        </dependency>

        <!-- MySQL -->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>8.0.33</version>
        </dependency>

        <!-- 连接池 -->
        <dependency>
            <groupId>com.mchange</groupId>
            <artifactId>c3p0</artifactId>
            <version>0.9.5.5</version>
        </dependency>

        <!-- MyBatis -->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>3.5.13</version>
        </dependency>
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis-spring</artifactId>
            <version>2.0.7</version>
        </dependency>

        <!-- 分页 -->
        <dependency>
            <groupId>com.github.pagehelper</groupId>
            <artifactId>pagehelper</artifactId>
            <version>5.3.2</version>
        </dependency>

        <!-- log4j -->
        <dependency>
            <groupId>log4j</groupId>
            <artifactId>log4j</artifactId>
            <version>1.2.17</version>
        </dependency>
        <!--实体类插件-->
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>1.18.42</version>
        </dependency>
    </dependencies>
</project>

创建数据库表并创建实体类

java 复制代码

@AllArgsConstructor//有参
@NoArgsConstructor//无参
@Data//get和set方法和toString方法
public class User implements Serializable {
    private int id; //编号id
    private String username; //用户名
    private String password; //密码
    private int age; //年龄
    private String sex; //性别
    private String email; //邮箱

    public User(String username, String password, int age, String sex, String email) {
        this.username = username;
        this.password = password;
        this.age = age;
        this.sex = sex;
        this.email = email;
    }
}

创建Spring框架的配置文件applicationContext.xml并配置IOC管理的对象

XML 复制代码

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:tx="http://www.springframework.org/schema/tx"
       xmlns:aop="http://www.springframework.org/schema/aop"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       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/tx
                           http://www.springframework.org/schema/tx/spring-tx.xsd
                           http://www.springframework.org/schema/aop
                           http://www.springframework.org/schema/aop/spring-aop.xsd">

    <!--开启注解扫描-->
    <context:component-scan base-package="com.study"></context:component-scan>

    <!--引入数据源db.properties文件-->
    <context:property-placeholder location="db.properties"></context:property-placeholder>

    <!--配置数据源-->
    <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
        <!--数据源注入-->
        <property name="driverClass" value="${jdbc.driver}"></property>
        <property name="jdbcUrl" value="${jdbc.url}"></property>
        <property name="user" value="${jdbc.username}"></property>
        <property name="password" value="${jdbc.password}"></property>
    </bean>

    <!--创建Mybatis核心对象:工厂对象-->
    <!--工厂对象-->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <!--注入数据源-->
        <property name="dataSource" ref="dataSource"></property>
        <!--加载sql映射文件-->
        <property name="mapperLocations" value="classpath:com/study/mapper/*.xml"></property>
        <!--自定义类型别名-->
        <property name="typeAliasesPackage" value="com.study.pojo"></property>
        <!--加载Mybatis核心配置文件-->
        <!--<property name="configLocation" value="classpath:mybatis-config.xml"></property>-->
        <!--分页插件配置-->
        <property name="plugins">
            <array>
                <bean class="com.github.pagehelper.PageInterceptor"></bean>
            </array>
        </property>
        <property name="configuration">
            <bean class="org.apache.ibatis.session.Configuration">
                <!--mapUnderscoreToCamelCase是否开启驼峰命名规则映射-->
                <property name="mapUnderscoreToCamelCase" value="true"></property>
                <!--开启延时加载开关-->
                <property name="lazyLoadingEnabled" value="true"></property>
                <!--关闭立即加载，实施按需加载-->
                <property name="aggressiveLazyLoading" value="false"></property>
                <!-- 开启二级缓存的支持 -->
                <property name="cacheEnabled" value="true"></property>
            </bean>
        </property>
    </bean>

    <!--配置扫描mapper接口的文件-->
    <bean id="scannerConfigurer" class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <!--扫描com.study.mapper中所有的接口，mybatis自动创建mapper接口实现类对象，
并且把创建好的对象放在ioc容器，id值为当前接口的名字-->
        <property name="basePackage" value="com.study.mapper"></property>
    </bean>

    <!--1.事务管理器对象-->
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource"></property>
    </bean>

    <!--开启事务注解驱动-->
    <!--<tx:annotation-driven transaction-manager="transactionManager"></tx:annotation-driven>-->

    <!--2.声明事务通知-->
    <tx:advice id="interceptor" transaction-manager="transactionManager">
        <!--配置事务-->
        <tx:attributes>
            <!--
            name:方法名
            read-only:表示是否只读
            propagation:表示传播行为  默认配置REQUIRED(用于增删改)或者SUPPORTS(用于查询)
            timeout:设置超时时间
            -->
            <tx:method name="transfer" read-only="false" propagation="REQUIRED" timeout="3"/>
            <tx:method name="transferList" read-only="false" propagation="REQUIRED" timeout="3"/>

            <!--只要方法名前有select find get 事务只只读为false -->
            <tx:method name="select*" read-only="true"/>
            <tx:method name="find*" read-only="true"/>
            <tx:method name="get*" read-only="true"/>

            <!--如果方法名前有insert update delete -->
            <tx:method name="inset*" read-only="false"/>
            <tx:method name="update*" read-only="false"/>
            <tx:method name="delete*" read-only="false"/>

            <!--(表示所有方法都支持事务)-->
            <tx:method name="*"/>
        </tx:attributes>
    </tx:advice>
    <!--配置切面-->
    <aop:config>
        <!--配置切入点-->
        <aop:pointcut id="txPointcut" expression="execution(* com.study.service.impl.*.*(..))"/>
        <!--将事务与切入点联系在一起-->
        <aop:advisor advice-ref="interceptor" pointcut-ref="txPointcut"></aop:advisor>
    </aop:config>
</beans>