Skip to content

Latest commit

 

History

History
170 lines (135 loc) · 5.22 KB

事务.md

File metadata and controls

170 lines (135 loc) · 5.22 KB
Raw

事务

属性

  • read-only：是否是只读事务。默认false，不只读。
  • isolation：指定事务的隔离级别。默认值是使用数据库的默认隔离级别。
  • propagation：指定事务的传播行为。
  • timeout：指定超时时间。默认值为：-1。永不超时。
  • rollback-for：用于指定一个异常，当执行产生该异常时，事务回滚。产生其他异常，事务不回滚。没有默认值，任何异常都回滚。
  • no-rollback-for：用于指定一个异常，当产生该异常时，事务不回滚，产生其他异常时，事务回滚。没有默认值，任何异常都回滚。

传播行为

202081185857

使用xml进行配置

  • 声明式事务
    • 声明式事务都是基于编程事务
<?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" xmlns:tx="http://www.springframework.org/schema/tx"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
        https://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/aop
        https://www.springframework.org/schema/aop/spring-aop.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd">

    <bean class="wang.ismy.spring.Dao">
        <constructor-arg ref="template"/>
    </bean>

    <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
        <property name="username" value="root"/>
        <property name="password" value="123"/>
        <property name="driverClassName" value="com.mysql.cj.jdbc.Driver"/>
        <property name="url" value="jdbc:mysql:///mybatis"/>
    </bean>

    <bean id="template" class="org.springframework.jdbc.core.JdbcTemplate">
        <constructor-arg name="dataSource" ref="dataSource"/>
    </bean>

    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource"/>
    </bean>

    <!--配置事务的通知-->
    <tx:advice id="txAdvice" transaction-manager="transactionManager">
        <tx:attributes>
            <tx:method name="transfer" propagation="REQUIRED" read-only="false"/>
        </tx:attributes>
    </tx:advice>

    <!--配置aop-->
    <aop:config>
        <aop:pointcut id="txPt" expression="execution(* wang.ismy.spring.Dao.*(..))"/>
        <!--建立切入点表达式与事务通知的关系-->
        <aop:advisor advice-ref="txAdvice" pointcut-ref="txPt"/>
    </aop:config>
</beans>
public class Dao {

    private JdbcTemplate jdbcTemplate;

    public Dao(JdbcTemplate jdbcTemplate) {
        this.jdbcTemplate = jdbcTemplate;
    }

    public void transfer(){
        String sql = "UPDATE account SET money = money -200 WHERE uid = 41";
        String sql1 = "UPDATE account SET money = money +200 WHERE uid = 45";
        jdbcTemplate.update(sql);
        jdbcTemplate.update(sql1);
    }
}

注解配置

@Configuration
@EnableTransactionManagement
public class Config {

    @Bean
    public DataSource dataSource(){
        DriverManagerDataSource dataSource = new DriverManagerDataSource();
        dataSource.setUsername("root");
        dataSource.setPassword("123");
        dataSource.setDriverClassName("com.mysql.cj.jdbc.Driver");
        dataSource.setUrl("jdbc:mysql:///mybatis");
        return dataSource;
    }

    @Bean
    public JdbcTemplate jdbcTemplate(DataSource dataSource){
        return new JdbcTemplate(dataSource);
    }

    @Bean
    public PlatformTransactionManager transactionManager(DataSource dataSource){
        return new DataSourceTransactionManager(dataSource);
    }
}
@Service
public class Dao {

    private JdbcTemplate jdbcTemplate;

    public Dao(JdbcTemplate jdbcTemplate) {
        this.jdbcTemplate = jdbcTemplate;
    }

    @Transactional(rollbackFor = Exception.class)
    public void transfer(){
        String sql = "UPDATE account SET money = money -200 WHERE uid = 41";
        String sql1 = "UPDATE account SET money = money +200 WHERE uid = 45";

        jdbcTemplate.update(sql);
        jdbcTemplate.update(sql1);
    }
}
  • 编程式事务
@Bean
public TransactionTemplate transactionTemplate(PlatformTransactionManager manager){
    return new TransactionTemplate(manager);
}
@Service
public class Dao {

    private JdbcTemplate jdbcTemplate;

    private TransactionTemplate transactionTemplate;

    public Dao(JdbcTemplate jdbcTemplate) {
        this.jdbcTemplate = jdbcTemplate;
    }

    public void transfer(){
        transactionTemplate.execute((TransactionCallback<Void>) status -> {
            String sql = "UPDATE account SET money = money -200 WHERE uid = 41";
            String sql1 = "UPDATE account SET money = money +200 WHERE uid = 45";
            jdbcTemplate.update(sql);
            jdbcTemplate.update(sql1);
            return null;
        });
    }

    @Autowired
    public void setTransactionTemplate(TransactionTemplate transactionTemplate) {
        this.transactionTemplate = transactionTemplate;
    }
}