springboot 事物开启的用法，你喜欢那种任选

总结：事物 我就不说了 acid 自行百度，开启事物的几种方式。

 大体分两种：声明式事务，编程式事务。

声明式事务 如下方式：

springboot 之 xml事务

可以使用 @ImportResource("classpath:transaction.xml") 引入该xml的配置，xml的配置如下

<?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
    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">
  <bean id="txManager"
    class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
    <property name="dataSource" ref="dataSource" ></property>
  </bean>
  <tx:advice id="cftxAdvice" transaction-manager="txManager">
    <tx:attributes>
      <tx:method name="query*" propagation="SUPPORTS" read-only="true" ></tx:method>
      <tx:method name="get*" propagation="SUPPORTS" read-only="true" ></tx:method>
      <tx:method name="select*" propagation="SUPPORTS" read-only="true" ></tx:method>
      <tx:method name="*" propagation="REQUIRED" rollback-for="Exception" ></tx:method>
    </tx:attributes>
  </tx:advice>
   <aop:config>
    <aop:pointcut id="allManagerMethod" expression="execution (* com.exmaple.fm..service.*.*(..))" />
    <aop:advisor advice-ref="txAdvice" pointcut-ref="allManagerMethod" order="0" />
  </aop:config>
</beans>
springboot 启动类如下：

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.ImportResource;
@ImportResource("classpath:transaction.xml")
@SpringBootApplication
public class Application {
  public static void main(String[] args) {
    SpringApplication.run(Application.class, args);
  }
}

　　

springboot 之 注解事务

1、Transactional注解事务
需要在进行事物管理的方法上添加注解@Transactional，或者偷懒的话直接在类上面添加该注解，使得所有的方法都进行事物的管理
但是依然需要在需要事务管理的类上都添加，工作量比较大
2、注解声明式事务
a.方式

这里使用Component或Configuration事务都可以生效　
import java.util.Collections;
import java.util.HashMap;
import java.util.Map;
import org.aspectj.lang.annotation.Aspect;
import org.springframework.aop.Advisor;
import org.springframework.aop.aspectj.AspectJExpressionPointcut;
import org.springframework.aop.support.DefaultPointcutAdvisor;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.stereotype.Component;
import org.springframework.transaction.PlatformTransactionManager;
import org.springframework.transaction.TransactionDefinition;
import org.springframework.transaction.interceptor.NameMatchTransactionAttributeSource;
import org.springframework.transaction.interceptor.RollbackRuleAttribute;
import org.springframework.transaction.interceptor.RuleBasedTransactionAttribute;
import org.springframework.transaction.interceptor.TransactionAttribute;
import org.springframework.transaction.interceptor.TransactionInterceptor;
/**
 * Created by guozp on 2017/8/28.
 */
@Aspect
@Configuration
public class TxAdviceInterceptor {

  private static final int TX_METHOD_TIMEOUT = 5;
  
  private static final String AOP_POINTCUT_EXPRESSION = "execution (* com.alibaba.fm9..service.*.*(..))";
  
  @Autowired
  private PlatformTransactionManager transactionManager;
  
  @Bean
  public TransactionInterceptor txAdvice() {
  
    NameMatchTransactionAttributeSource source = new NameMatchTransactionAttributeSource();
     /*只读事务，不做更新操作*/
    RuleBasedTransactionAttribute readOnlyTx = new RuleBasedTransactionAttribute();
    readOnlyTx.setReadOnly(true);
    readOnlyTx.setPropagationBehavior(TransactionDefinition.PROPAGATION_NOT_SUPPORTED );
	
    /*当前存在事务就使用当前事务，当前不存在事务就创建一个新的事务*/
    RuleBasedTransactionAttribute requiredTx = new RuleBasedTransactionAttribute();
    requiredTx.setRollbackRules(
      Collections.singletonList(new RollbackRuleAttribute(Exception.class)));
    requiredTx.setPropagationBehavior(TransactionDefinition.PROPAGATION_REQUIRED);
    requiredTx.setTimeout(TX_METHOD_TIMEOUT);
    Map<String, TransactionAttribute> txMap = new HashMap<>();
    txMap.put("add*", requiredTx);
    txMap.put("save*", requiredTx);
    txMap.put("insert*", requiredTx);
    txMap.put("update*", requiredTx);
    txMap.put("delete*", requiredTx);
    txMap.put("get*", readOnlyTx);
    txMap.put("query*", readOnlyTx);
    source.setNameMap( txMap );
	
    TransactionInterceptor txAdvice = new TransactionInterceptor(transactionManager, source);
    return txAdvice;
  }
  
  @Bean
  public Advisor txAdviceAdvisor() {
    AspectJExpressionPointcut pointcut = new AspectJExpressionPointcut();
    pointcut.setExpression(AOP_POINTCUT_EXPRESSION);
    return new DefaultPointcutAdvisor(pointcut, txAdvice());
  }
}

　

springboot 之 编程式事务

 

@Resource
PlatformTransactionManager transactionManager;

public void addUser(User user) throws Exception {

TransactionDefinition def = new DefaultTransactionDefinition();
TransactionStatus status = transactionManager.getTransaction(def);

try {

// [1] 插入纪录
userDAO.insert(user);

// [2] 范例抛出异常
Integer i = null;
if (i.equals(0)) {

}

transactionManager.commit(status);
} catch (Exception e) {
transactionManager.rollback(status);
throw e;
}
return;
}

　　https://blog.csdn.net/f641385712/article/details/89602418

https://blog.csdn.net/f641385712/article/details/91538445