spring-註解----transactionjava
package com.zwj.config; import java.beans.PropertyVetoException; import javax.sql.DataSource; import org.springframework.aop.aspectj.annotation.AnnotationAwareAspectJAutoProxyCreator; import org.springframework.aop.framework.autoproxy.InfrastructureAdvisorAutoProxyCreator; 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.PlatformTransactionManager; import org.springframework.transaction.annotation.AnnotationTransactionAttributeSource; import org.springframework.transaction.annotation.EnableTransactionManagement; import org.springframework.transaction.annotation.ProxyTransactionManagementConfiguration; import org.springframework.transaction.annotation.TransactionManagementConfigurationSelector; import org.springframework.transaction.annotation.Transactional; import com.mchange.v2.c3p0.ComboPooledDataSource; /** * 聲明式事務: * * 環境搭建: * 一、導入相關依賴 * 數據源、數據庫驅動、Spring-jdbc模塊 * 二、配置數據源、JdbcTemplate(Spring提供的簡化數據庫操做的工具)操做數據 * 三、給方法上標註 @Transactional 表示當前方法是一個事務方法; * 四、 @EnableTransactionManagement 開啓基於註解的事務管理功能; * @EnableXXX * 五、配置事務管理器來控制事務; * @Bean * public PlatformTransactionManager transactionManager() * * * 原理: * 1)、@EnableTransactionManagement * 利用TransactionManagementConfigurationSelector給容器中會導入組件 * 導入兩個組件 * AutoProxyRegistrar * ProxyTransactionManagementConfiguration * 2)、AutoProxyRegistrar: * 給容器中註冊一個 InfrastructureAdvisorAutoProxyCreator 組件; * InfrastructureAdvisorAutoProxyCreator:? * 利用後置處理器機制在對象建立之後,包裝對象,返回一個代理對象(加強器),代理對象執行方法利用攔截器鏈進行調用; * * 3)、ProxyTransactionManagementConfiguration 作了什麼? * 一、給容器中註冊事務加強器; * 1)、事務加強器要用事務註解的信息,AnnotationTransactionAttributeSource解析事務註解 * 2)、事務攔截器: * TransactionInterceptor;保存了事務屬性信息,事務管理器; * 他是一個 MethodInterceptor; * 在目標方法執行的時候; * 執行攔截器鏈; * 事務攔截器: * 1)、先獲取事務相關的屬性 * 2)、再獲取PlatformTransactionManager,若是事先沒有添加指定任何transactionmanger * 最終會從容器中按照類型獲取一個PlatformTransactionManager; * 3)、執行目標方法 * 若是異常,獲取到事務管理器,利用事務管理回滾操做; * 若是正常,利用事務管理器,提交事務 * */ @EnableTransactionManagement @ComponentScan("com.zwj.tx") @Configuration public class TxConfig { //數據源 @Bean public DataSource dataSource() throws Exception{ ComboPooledDataSource dataSource = new ComboPooledDataSource(); dataSource.setUser("root"); dataSource.setPassword("123456"); dataSource.setDriverClass("com.mysql.jdbc.Driver"); dataSource.setJdbcUrl("jdbc:mysql://localhost:3306/test"); return dataSource; } // @Bean public JdbcTemplate jdbcTemplate() throws Exception{ //Spring對@Configuration類會特殊處理;給容器中加組件的方法,屢次調用都只是從容器中找組件 JdbcTemplate jdbcTemplate = new JdbcTemplate(dataSource()); return jdbcTemplate; } //註冊事務管理器在容器中 @Bean public PlatformTransactionManager transactionManager() throws Exception{ return new DataSourceTransactionManager(dataSource()); } }
package com.zwj.tx; import java.util.UUID; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.jdbc.core.JdbcTemplate; import org.springframework.stereotype.Repository; @Repository public class UserDao { @Autowired private JdbcTemplate jdbcTemplate; public void insert(){ String sql = "INSERT INTO `tbl_user`(username,age) VALUES(?,?)"; String username = UUID.randomUUID().toString().substring(0, 5); jdbcTemplate.update(sql, username,19); } }
package com.zwj.tx; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Service; import org.springframework.transaction.annotation.Transactional; @Service public class UserService { @Autowired private UserDao userDao; @Transactional public void insertUser(){ userDao.insert(); //otherDao.other();xxx System.out.println("插入完成..."); int i = 10/0; } }
package com.zwj.test; import org.junit.Test; import org.springframework.context.annotation.AnnotationConfigApplicationContext; import com.zwj.config.TxConfig; import com.zwj.tx.UserService; public class IOCTest_Tx { @Test public void test01(){ AnnotationConfigApplicationContext applicationContext = new AnnotationConfigApplicationContext(TxConfig.class); UserService userService = applicationContext.getBean(UserService.class); userService.insertUser(); applicationContext.close(); } }
<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.zwj</groupId> <artifactId>spring-annotation---transactions</artifactId> <version>0.0.1-SNAPSHOT</version> <dependencies> <!-- https://mvnrepository.com/artifact/org.springframework/spring-context --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context</artifactId> <version>4.3.12.RELEASE</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-aspects</artifactId> <version>4.3.12.RELEASE</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-jdbc</artifactId> <version>4.3.12.RELEASE</version> </dependency> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>4.12</version> <scope>test</scope> </dependency> <!-- https://mvnrepository.com/artifact/javax.inject/javax.inject --> <dependency> <groupId>javax.inject</groupId> <artifactId>javax.inject</artifactId> <version>1</version> </dependency> <!-- https://mvnrepository.com/artifact/c3p0/c3p0 --> <dependency> <groupId>c3p0</groupId> <artifactId>c3p0</artifactId> <version>0.9.1.2</version> </dependency> <!-- https://mvnrepository.com/artifact/mysql/mysql-connector-java --> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>5.1.44</version> </dependency> </dependencies> </project>