* 聲明式事務： * * 環境搭建： * 1、導入相關依賴 * 數據源、數據庫驅動、Spring-jdbc模塊 * 2、配置數據源、JdbcTemplate（Spring提供的簡化數據庫操作的工具）操作數據 * 3、給方法上標注 @Transactional 表示當前方法是一個事務方法； * 4、 @EnableTransactionManagement 開啟基于注解的事務管理功能； * @EnableXXX * 5、配置事務管理器來控制事務; * @Bean * public PlatformTransactionManager transactionManager()

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UserDao.java

package com.dym.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 {@Autowiredprivate 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);}}

UserService.java

package com.dym.tx;import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Service; import org.springframework.transaction.annotation.Transactional;@Service public class UserService {@Autowiredprivate UserDao userDao;@Transactionalpublic void insertUser(){userDao.insert();//otherDao.other();xxxSystem.out.println("插入完成..."); // int i = 10/0;}}

TxConfig.java

package com.dym.tx;import javax.sql.DataSource;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.EnableTransactionManagement;import com.mchange.v2.c3p0.ComboPooledDataSource;@EnableTransactionManagement @ComponentScan("com.dym.tx") @Configuration public class TxConfig {//數據源@Beanpublic DataSource dataSource() throws Exception{ComboPooledDataSource dataSource = new ComboPooledDataSource();dataSource.setUser("root");dataSource.setPassword("root");dataSource.setDriverClass("com.mysql.jdbc.Driver");dataSource.setJdbcUrl("jdbc:mysql://localhost:3306/test");return dataSource;}//@Beanpublic JdbcTemplate jdbcTemplate() throws Exception{//Spring對@Configuration類會特殊處理；給容器中加組件的方法，多次調用都只是從容器中找組件JdbcTemplate jdbcTemplate = new JdbcTemplate(dataSource());return jdbcTemplate;}//注冊事務管理器在容器中@Beanpublic PlatformTransactionManager transactionManager() throws Exception{return new DataSourceTransactionManager(dataSource());}}

IOCTest_Tx.java

package com.dym.test;import org.junit.Test; import org.springframework.context.annotation.AnnotationConfigApplicationContext;import com.dym.tx.TxConfig; import com.dym.tx.UserService;public class IOCTest_Tx {@Testpublic void test01(){AnnotationConfigApplicationContext applicationContext = new AnnotationConfigApplicationContext(TxConfig.class);UserService userService = applicationContext.getBean(UserService.class);userService.insertUser();applicationContext.close();}}

總結

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