这期内容当中小编将会给大家带来有关Java Spring声明式事务是什么，文章内容丰富且以专业的角度为大家分析和叙述，阅读完这篇文章希望大家可以有所收获。
IAccountDao.java：
package tx.dao;
import java.math.BigDecimal;
public interface IAccountDao {
void add(String name, BigDecimal money);
void sub(String name, BigDecimal money);
}AccountDaoImpl.java：
package tx.service.impl;
import tx.dao.IAccountDao;
import tx.service.IAccountService;
import java.math.BigDecimal;
public class AccountServiceImpl implements IAccountService {
private IAccountDao accountDao;
public void setAccountDao(IAccountDao accountDao) {
this.accountDao = accountDao;
}
@Override
public void tran(String from, String to, BigDecimal money) {
accountDao.sub(from, money);
accountDao.add(to, money);
}
}IAccountService.java：
package tx.service;
import java.math.BigDecimal;
public interface IAccountService {
void tran(String from, String to, BigDecimal money);
}AccountDaoImpl.java：
package tx.dao.impl;
import org.springframework.jdbc.core.JdbcTemplate;
import tx.dao.IAccountDao;
import java.math.BigDecimal;
public class AccountDaoImpl implements IAccountDao {
private JdbcTemplate jdbcTemplate;
public void setJdbcTemplate(JdbcTemplate jdbcTemplate) {
this.jdbcTemplate = jdbcTemplate;
}
@Override
public void add(String name, BigDecimal money) {
jdbcTemplate.update("update account set balance = balance + ? where name = ? ", money.toString(), name);
}
@Override
public void sub(String name, BigDecimal money) {
jdbcTemplate.update("update account set balance = balance - ? where name = ? ", money.toString(), name);
}
}<?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:tx="http://www.springframework.org/schema/tx" 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/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 "> <!--配置数据源--> <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource" destroy-method="close"> <property name="url" value="jdbc:mysql://localhost:3306/test?useSSL=false"/> <property name="username" value="root"/> <property name="password" value="19834044876"/> <property name="driverClassName" value="com.mysql.cj.jdbc.Driver"/> </bean> <!--创建事务管理器--> <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"> <!--注入数据源--> <property name="dataSource" ref="dataSource"/> </bean> <!--配置jdbcTemplate对象--> <bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate"> <!--注入dataSource--> <property name="dataSource" ref="dataSource"/> </bean> <!--将JdbcTemplate注入到AccountDao中--> <bean id="accountDao" class="tx.dao.impl.AccountDaoImpl"> <property name="jdbcTemplate" ref="jdbcTemplate"/> </bean> <!--将AccountDao注入到AccountService中--> <bean id="accountService" class="tx.service.impl.AccountServiceImpl"> <property name="accountDao" ref="accountDao"/> </bean> <!--配置事务通知--> <tx:advice id="txAdvice"> <!--配置事务参数--> <tx:attributes> <!--指定哪些方法上面添加事务--> <tx:method name="tran"/> <!-- name="*", name="tran*", name="*tran", ... --> </tx:attributes> </tx:advice> <!--配置切入点和切面--> <aop:config> <!--配置切入点--> <aop:pointcut id="pointCut" expression="execution(* tx.service.IAccountService.*(..))"/> <!--配置通知--> <aop:advisor advice-ref="txAdvice" pointcut-ref="pointCut"/> </aop:config> </beans>
ApplicationContext context = new ClassPathXmlApplicationContext("tx.xml");
IAccountService accountService = context.getBean("accountService", IAccountService.class);
accountService.tran("小明", "小红", new BigDecimal(500));IAccountDao.java：
package tx.dao;
import java.math.BigDecimal;
public interface IAccountDao {
void add(String name, BigDecimal money);
void sub(String name, BigDecimal money);
}AccountDaoImpl.java：
package tx.dao.impl;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.stereotype.Repository;
import tx.dao.IAccountDao;
import java.math.BigDecimal;
@Repository
public class AccountDaoImpl implements IAccountDao {
@Autowired
private JdbcTemplate jdbcTemplate;
@Override
public void add(String name, BigDecimal money) {
jdbcTemplate.update("update account set balance = balance + ? where name = ? ", money.toString(), name);
}
@Override
public void sub(String name, BigDecimal money) {
jdbcTemplate.update("update account set balance = balance - ? where name = ? ", money.toString(), name);
}
}IAccountService.java：
package tx.service;
import java.math.BigDecimal;
public interface IAccountService {
void tran(String from, String to, BigDecimal money);
}AccountServiceImpl.java：
package tx.service.impl;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import tx.dao.IAccountDao;
import tx.service.IAccountService;
import java.math.BigDecimal;
@Service
@Transactional
public class AccountServiceImpl implements IAccountService {
@Autowired
private IAccountDao accountDao;
@Override
public void tran(String from, String to, BigDecimal money) {
accountDao.sub(from, money);
accountDao.add(to, money);
}
}TXConfig.java
package tx.config;
import com.alibaba.druid.pool.DruidDataSource;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.jdbc.datasource.DataSourceTransactionManager;
import org.springframework.transaction.annotation.EnableTransactionManagement;
import tx.service.IAccountService;
import tx.service.impl.AccountServiceImpl;
import javax.sql.DataSource;
@Configuration
@ComponentScan(basePackages = "tx")
@EnableTransactionManagement
public class TXConfig {
/**
* 配置数据源
*/
@Bean
public DataSource getDataSource() {
DruidDataSource dataSource = new DruidDataSource();
dataSource.setUrl("jdbc:mysql://localhost:3306/test?useSSL=false");
dataSource.setUsername("root");
dataSource.setPassword("19834044876");
dataSource.setDriverClassName("com.mysql.cj.jdbc.Driver");
return dataSource;
}
/**
* 创建事务管理器
*/
@Bean
public DataSourceTransactionManager getTransactionManager() {
return new DataSourceTransactionManager(getDataSource());
}
/**
* 配置jdbcTemplate对象
*/
@Bean
public JdbcTemplate getJdbcTemplate() {
return new JdbcTemplate(getDataSource());
}
@Bean(name = "accountService")
public IAccountService getAccountService() {
return new AccountServiceImpl();
}
}ApplicationContext context = new AnnotationConfigApplicationContext(TXConfig.class);
IAccountService accountService = context.getBean("accountService", IAccountService.class);
accountService.tran("小明", "小红", new BigDecimal(500));
指定碰到哪些异常不需要回滚
指定碰到哪些异常需要回滚
设置事务为只读事务
以秒为单位，设置事务超出指定时常后自动回滚
默认为-1，即不管事务运行多久都不回滚
事务的隔离级别
默认为DEFAULT，即使用当前数据库的隔离级别
事务的传播行为
默认为REQUIRED
上述就是小编为大家分享的Java Spring声明式事务是什么了，如果刚好有类似的疑惑，不妨参照上述分析进行理解。如果想知道更多相关知识，欢迎关注亿速云行业资讯频道。
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