MyBatis与Spring的整合

1. 实现MyBatis与Spring的整合

图解:

相关依赖,映射文件,MyBatis-config配置文件与Spring配置文件模板会放在附录,需要自取

制作模板:

2. 为业务层添加声明式事务

为了防止代码运行时出现多个方法实现时部分修改成功,部分修改失败导致数据异常,我们可以在业务层添加声明式事务

复制代码
    <!--事务管理器 ,创建事务的-->
    <bean id="txManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource"/>
    </bean>

    <!--开启事务的注解配置-->
    <tx:annotation-driven transaction-manager="txManager"/>

    <!--在业务逻辑层添加注解-->
    <!--@Transactional  //表示当前这个中的所有放都添加事务的功能-->
    <!--@Transactional(propagation = Propagation.SUPPORTS,readOnly = true) //用于查询,当前方法为只读,不允许修改数据库 supports:存在事务执行事务,不存在事务则正常运行-->

3. 总结

附录:

相关依赖

复制代码
<?xml version="1.0" encoding="UTF-8"?>

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>

  <groupId>com.zb</groupId>
  <artifactId>mavenweb</artifactId>
  <version>1.0-SNAPSHOT</version>
  <packaging>war</packaging>

  <name>mavenweb Maven Webapp</name>
  <!-- FIXME change it to the project's website -->
  <url>http://www.example.com</url>

  <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
      <maven.compiler.source>8</maven.compiler.source>
      <maven.compiler.target>8</maven.compiler.target>
    <spring.version>4.1.7.RELEASE</spring.version>
  </properties>

  <dependencies>
    <!--maven单元测试-->
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>4.13.1</version>
      <scope>test</scope>
    </dependency>

      <!--mysql数据库连接-->
      <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
        <version>5.1.49</version>
      </dependency>

      <!--json-->
    <dependency>
      <groupId>com.alibaba</groupId>
      <artifactId>fastjson</artifactId>
      <version>1.2.33</version>
    </dependency>

      <!--servlet-->
    <dependency>
      <groupId>javax.servlet</groupId>
      <artifactId>servlet-api</artifactId>
      <version>2.5</version>
      <scope>provided</scope>
    </dependency>

    <!--mybatis-->
    <dependency>
      <groupId>org.mybatis</groupId>
      <artifactId>mybatis</artifactId>
      <version>3.5.16</version>
    </dependency>

    <!--日志-->
    <dependency>
      <groupId>log4j</groupId>
      <artifactId>log4j</artifactId>
      <version>1.2.17</version>
    </dependency>
      <dependency>
          <groupId>org.slf4j</groupId>
          <artifactId>slf4j-api</artifactId>
          <version>1.6.1</version>
      </dependency>
      <dependency>
          <groupId>org.slf4j</groupId>
          <artifactId>slf4j-log4j12</artifactId>
          <version>1.6.1</version>
      </dependency>
      <dependency>
      <groupId>org.slf4j</groupId>
      <artifactId>slf4j-nop</artifactId>
      <version>1.6.1</version>
      </dependency>

    <!--lombok-->
    <dependency>
      <groupId>org.projectlombok</groupId>
      <artifactId>lombok</artifactId>
      <version>1.18.30</version>
    </dependency>


      <!--spring框架-->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-context</artifactId>
      <version>${spring.version}</version>
    </dependency>

    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-aop</artifactId>
      <version>${spring.version}</version>
    </dependency>

    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-beans</artifactId>
      <version>${spring.version}</version>
    </dependency>

    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-core</artifactId>
      <version>${spring.version}</version>
    </dependency>

    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-expression</artifactId>
      <version>${spring.version}</version>
    </dependency>

    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-jdbc</artifactId>
      <version>${spring.version}</version>
    </dependency>

    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-tx</artifactId>
      <version>${spring.version}</version>
    </dependency>

      <!--切面-->
      <dependency>
          <groupId>org.aspectj</groupId>
          <artifactId>aspectjrt</artifactId>
          <version>1.7.4</version>
      </dependency>
      <dependency>
          <groupId>org.aspectj</groupId>
          <artifactId>aspectjweaver</artifactId>
          <version>1.7.4</version>
      </dependency>

      <!--数据库连接-->
      <!-- 新增 -->
      <dependency>
          <groupId>org.mybatis</groupId>
          <artifactId>mybatis-spring</artifactId>
          <version>1.3.0</version>
      </dependency>

      <dependency>
          <groupId>com.mchange</groupId>
          <artifactId>c3p0</artifactId>
          <version>0.9.5.5</version> <!-- 升级到该版本 -->
      </dependency>


  </dependencies>

  <build>
    <finalName>mavenweb</finalName>
    <pluginManagement><!-- lock down plugins versions to avoid using Maven defaults (may be moved to parent pom) -->
      <plugins>
        <plugin>
          <artifactId>maven-clean-plugin</artifactId>
          <version>3.1.0</version>
        </plugin>
        <!-- see http://maven.apache.org/ref/current/maven-core/default-bindings.html#Plugin_bindings_for_war_packaging -->
        <plugin>
          <artifactId>maven-resources-plugin</artifactId>
          <version>3.0.2</version>
        </plugin>
        <plugin>
          <artifactId>maven-compiler-plugin</artifactId>
          <version>3.8.0</version>
        </plugin>
        <plugin>
          <artifactId>maven-surefire-plugin</artifactId>
          <version>2.22.1</version>
        </plugin>
        <plugin>
          <artifactId>maven-war-plugin</artifactId>
          <version>3.2.2</version>
        </plugin>
        <plugin>
          <artifactId>maven-install-plugin</artifactId>
          <version>2.5.2</version>
        </plugin>
        <plugin>
          <artifactId>maven-deploy-plugin</artifactId>
          <version>2.8.2</version>
        </plugin>
      </plugins>
    </pluginManagement>
  </build>
</project>

mybatis-config模板

复制代码
<?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>

    <!--日志格式-->
    <settings>
        <setting name="logImpl" value="LOG4J"/>
    </settings>

    <!--加载mybatis的映射文件-->
    <mappers>
        <mapper resource=""></mapper>
    </mappers>
</configuration>

spring-mybatis模板

复制代码
<?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:tx="http://www.springframework.org/schema/tx"
       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">
    <!--程序中注解所在的父包 ?packagePath? main/java下的父包-->
    <context:component-scan base-package="?packagePath?"/>

    <!--数据源,负责创建数据库连接池 ?database?数据库名称 user用户 password密码-->
    <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
        <property name="driverClass" value="com.mysql.jdbc.Driver"/>
        <property name="jdbcUrl" value="jdbc:mysql://localhost:3306/?database?"/>
        <property name="user" value=""/>
        <property name="password" value=""/>
    </bean>

    <!--创建mybatis的连接工厂 ?myBatisConfigPath? MyBatis配置文件路径-->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <!--加载mybatis的主配置文件-->
        <property name="configLocation" value="classpath:?MybatisConfigPath?"/>
        <!--注入数据源-->
        <property name="dataSource" ref="dataSource"/>
    </bean>

    <!--
        自动扫描指定包下的Mapper接口,为接口创建实例化对象, 在业务层中通过@Autowired实现对象注入
        类型如下功能
        xxxMapper = session.getMapper(xxxMapper.class);
        ?interface? 实现的接口包的路径,如com.zb.mapper
    -->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="?mapperPath?"/>
        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
    </bean>


    <!--事务管理器 ,创建事务的-->
    <bean id="txManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource"/>
    </bean>

    <!--开启事务的注解配置-->
    <tx:annotation-driven transaction-manager="txManager"/>

    <!--在业务逻辑层添加注解-->
    <!--@Transactional  //表示当前这个中的所有放都添加事务的功能-->
    <!--@Transactional(propagation = Propagation.SUPPORTS,readOnly = true) //当前方法为只读,不允许修改数据库 supports:存在事务执行事务,不存在事务则正常运行-->

</beans>

xxxMapper模板(sql语句)

复制代码
<?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">
<!--?interface?映射接口-->        
<mapper namespace="?interface?">

    <!--?class?实体类映射-->
    <resultMap id="!example!" type="?class?">
        <result property="?entity?" column="?sqlColumn?"/>
    </resultMap>
    
    <!--sql查询语句 ?interfaceMethod?对应接口方法-->
    <select id="?interfaceMethod?" resultMap="!example!">
        select * from XXX
        <where>
        </where>
    </select>
    
    <!--sql添加语句 ?interfaceMethod?对应接口方法 ?type?类型,如整型,对象等-->
    <insert id="?interfaceMethod?" parameterType="?type?">
        insert into XXX values(?,?,?,?)
    </insert>
    
    <!--sql删除语句 ?interfaceMethod?对应接口方法 ?type?类型,如整型,对象等-->
    <delete id="?interfaceMethod?" parameterType="?type?">
        delete from XXX
        <where>
        </where>
    </delete>
    
    <!--sql修改语句 ?interfaceMethod?对应接口方法 ?type?类型,如整型,对象等-->
    <update id="?interfaceMethod?" parameterType="?type?">
        update XXX
        <set>
        </set>
        <where>
        </where>
    </update>
    
</mapper>
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