Transacción declarativa de primavera (anotación)

1.1 Directorio de proyectos

1.2 Clase de configuración de la capa de persistencia

package cn.guardwhy.config;

import com.alibaba.druid.pool.DruidDataSource;
import org.springframework.context.annotation.Bean;
import org.springframework.jdbc.core.JdbcTemplate;

import javax.sql.DataSource;

/**
 * 持久层配置类
 */
public class DaoConfiguration {
    
    
    /**
     * 创建JdbcTemplate对象
     */
    @Bean("jdbcTemplate")
    public JdbcTemplate getJdbcTemplate(DataSource dataSource){
    
    
        JdbcTemplate jdbcTemplate = new JdbcTemplate();
        jdbcTemplate.setDataSource(dataSource);
        return jdbcTemplate;
    }

    /**
     * 创建数据源对象
     */
    @Bean("dataSource")
    public DataSource createDataSource(){
    
    
        // 创建DataSource
        DruidDataSource dataSource = new DruidDataSource();

        // 注入属性
        dataSource.setDriverClassName("com.mysql.jdbc.Driver");
        dataSource.setUrl("jdbc:mysql://127.0.0.1:3306/spring");
        dataSource.setUsername("root");
        dataSource.setPassword("root");

        dataSource.setInitialSize(6);
        dataSource.setMinIdle(3);
        dataSource.setMaxActive(50);
        dataSource.setMaxWait(60000);
        dataSource.setTimeBetweenEvictionRunsMillis(60000);
        return dataSource;
    }
}

1.3 Clase de configuración de transacción

package cn.guardwhy.config;

import org.springframework.context.annotation.Bean;
import org.springframework.jdbc.datasource.DataSourceTransactionManager;

import javax.sql.DataSource;

/**
 * 事务配置类
 */
public class TransactionConfiguration {
    
    
    @Bean("transactionManager")
    public DataSourceTransactionManager getTransactionManager(DataSource dataSource){
    
    

        // 创建事务管理器对象
        DataSourceTransactionManager transactionManager = new DataSourceTransactionManager();

        // 设置数据源
        transactionManager.setDataSource(dataSource);

        return transactionManager;
    }
}

1.4 Clase de configuración principal

package cn.guardwhy.config;

import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Import;
import org.springframework.transaction.annotation.EnableTransactionManagement;

/**
 * 主配置类步骤：
 *      1.使用@Configuration注解，声明主配置类
 *      2.使用@ComponentScan注解，扫描注解配置
 *      3.使用@Import注解，导入其它模块配置类
 *      4.使用@EnableTransactionManagement注解，启用spring对注解事务的配置
 */
@Configuration
@ComponentScan(value="cn.guardwhy")
@Import(value={
    
    DaoConfiguration.class,TransactionConfiguration.class})
@EnableTransactionManagement
public class SpringConfiguration {
    
    
}

1.5 Capa de presentación

AccountController

package cn.guardwhy.controller;

import cn.guardwhy.config.SpringConfiguration;
import cn.guardwhy.service.AccountService;
import org.springframework.context.ApplicationContext;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;

/**
 * 账户表现层
 */
public class AccountController {
    
    

    public static void main(String[] args) {
    
    
        // 1.加载spring配置文件，创建spring ioc容器
        ApplicationContext context = new AnnotationConfigApplicationContext(SpringConfiguration.class);

        // 2.获取账户service
        AccountService accountService = (AccountService)context.getBean("accountService");

        // 3.转账操作
        accountService.transfer("curry","james",200f);
    }
}

1.6 Resultados de la ejecución

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