spring基于xml的声明式事务控制

一、pom.xml

<?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>org.example</groupId>
    <artifactId>A02spring</artifactId>
    <version>1.0-SNAPSHOT</version>

    <dependencies>
        <!--https://mvnrepository.com/artifact/org.springframework/spring-context-->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>5.2.8.RELEASE</version>
        </dependency>
        <!--https://mvnrepository.com/artifact/org.springframework/spring-context-->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>5.2.8.RELEASE</version>
        </dependency>
        <!--https://mvnrepository.com/artifact/org.springframework/spring-context-->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-tx</artifactId>
            <version>5.2.8.RELEASE</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.aspectj/aspectjweaver -->
        <dependency>
            <groupId>org.aspectj</groupId>
            <artifactId>aspectjweaver</artifactId>
            <version>1.9.6</version>
        </dependency>
        <!--https://mvnrepository.com/artifact/org.springframework/spring-context-->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>8.0.11</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.projectlombok/lombok -->
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>1.18.12</version>
            <scope>provided</scope>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.springframework/spring-test -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-test</artifactId>
            <version>5.2.8.RELEASE</version>
            <scope>test</scope>
        </dependency>
        <!-- https://mvnrepository.com/artifact/junit/junit -->
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.13</version>
            <scope>test</scope>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <configuration>
                    <source>1.8</source>
                    <target>1.8</target>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>

二、spring的xml配置文件

<?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: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/tx
        https://www.springframework.org/schema/tx/spring-tx.xsd
        http://www.springframework.org/schema/aop
        https://www.springframework.org/schema/aop/spring-aop.xsd">

    <bean id="accountService" class="com.wuxi.services.impl.AccountServiceImpl">
        <property name="accountDao" ref="accountDao"></property>
    </bean>

    <bean id="accountDao" class="com.wuxi.daos.impl.AccountDaoImpl">
        <property name="dataSource" ref="dataSource"></property>
    </bean>

    <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
        <property name="driverClassName" value="com.mysql.cj.jdbc.Driver"></property>
        <property name="url"
                  value="jdbc:mysql://192.168.2.105:3306/ssm?characterEncoding=utf8&amp;useSSL=false"></property>
        <property name="username" value="root"></property>
        <property name="password" value="123456"></property>
    </bean>

<!--
spring中基于xml的声明式事务控制配置步骤
    1、配置事务管理器
    2、配置事务的通知
    3、配置aop中的通用切入点表达式
    4、建立事务通知和切入点表达式的对应关系
    5、配置事务的属性
-->
    <!--事务管理器-->
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource"></property>
    </bean>
    <!--事务的通知-->
    <tx:advice id="txAdvice" transaction-manager="transactionManager">
        <!--
        事务的属性
            isolation：用于指定事务的隔离级别。默认值是DEFAULE，表示使用数据库的默认隔离级别。
            propagation：用于指定事务的传播行为。默认值是REQUIRED，表示一定会有事务，增删改的选择。查询方法可以选择SUPPORTYS。
            read-only：用于指定事务是否只读。只有查询方法才能设置为true。默认值是false，表示读写。
            timeout：用于指定事务的超时时间，默认值是-1，表示永不超时，如果指定了数值，以秒为单位。
            rollback-for：用于指定一个异常，当产生该异常时，事务回滚，产生其他异常时，事务不回滚。没有默认值。表示任何异常都回滚。
            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。表示任何异常都回滚。
        -->
        <tx:attributes>
            <tx:method name="*" propagation="REQUIRED" read-only="false"/>
            <tx:method name="find*" propagation="SUPPORTS" read-only="true"/>
        </tx:attributes>
    </tx:advice>
    <aop:config>
        <!--切入点表达式-->
        <aop:pointcut id="ptc" expression="execution(* com.wuxi.services.*.*(..))"/>
        <!--切入点表达式和事务通知的对应关系-->
        <aop:advisor advice-ref="txAdvice" pointcut-ref="ptc"></aop:advisor>
    </aop:config>

</beans>

三、实体类

package com.wuxi.beans;

import lombok.Data;

import java.io.Serializable;

@Data
public class Account implements Serializable {
    private Integer id;
    private String name;
    private Float money;
}

四、dao

　　1、接口

package com.wuxi.daos;

import com.wuxi.beans.Account;

public interface AccountDao {
    Account findAccountById(Integer accountId);

    Account findAccountByName(String accountName);

    void updateAccount(Account account);
}

　　2、实现类

package com.wuxi.daos.impl;

import com.wuxi.beans.Account;
import com.wuxi.daos.AccountDao;
import org.springframework.jdbc.core.BeanPropertyRowMapper;
import org.springframework.jdbc.core.support.JdbcDaoSupport;

import java.util.List;

public class AccountDaoImpl extends JdbcDaoSupport implements AccountDao {
    @Override
    public Account findAccountById(Integer accountId) {
        List<Account> accounts = getJdbcTemplate().query("select * from account where id = ?", new BeanPropertyRowMapper<Account>(Account.class), accountId);
        return accounts.isEmpty() ? null : accounts.get(0);
    }

    @Override
    public Account findAccountByName(String accountName) {
        List<Account> accounts = getJdbcTemplate().query("select * from account where name = ?", new BeanPropertyRowMapper<Account>(Account.class), accountName);
        if (accounts.isEmpty()) {
            return null;
        }
        if (accounts.size() > 1) {
            throw new RuntimeException("结果集不唯一");
        }
        return accounts.get(0);
    }

    @Override
    public void updateAccount(Account account) {
        getJdbcTemplate().update("update account set name=?,money=? where id=?", account.getName(), account.getMoney(), account.getId());
    }
}

五、service

　　1、接口

package com.wuxi.services;

import com.wuxi.beans.Account;

public interface AccountService {
    Account findAccounById(Integer accountId);

    void transfer(String sourceName, String targetName, Float money);
}

　　2、实现类

package com.wuxi.services.impl;

import com.wuxi.beans.Account;
import com.wuxi.daos.AccountDao;
import com.wuxi.services.AccountService;

public class AccountServiceImpl implements AccountService {
    private AccountDao accountDao;

    public void setAccountDao(AccountDao accountDao) {
        this.accountDao = accountDao;
    }

    @Override
    public Account findAccounById(Integer accountId) {
        return accountDao.findAccountById(accountId);
    }

    @Override
    public void transfer(String sourceName, String targetName, Float money) {
        Account source = accountDao.findAccountByName(sourceName);
        Account target = accountDao.findAccountByName(targetName);

        source.setMoney(source.getMoney() - money);
        target.setMoney(target.getMoney() + money);

        accountDao.updateAccount(source);
        int i = 1 / 0;
        accountDao.updateAccount(target);
    }
}

六、测试

package com.wuxi.tests;

import com.wuxi.services.AccountService;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations = "classpath:application.xml")
public class MySpringTest {

    @Autowired
    private AccountService as;

    @Test
    public void testTransfer() {
        as.transfer("aaa", "bbb", 100f);
    }
}