Spring Boot——项目启动自动执行sql脚本

背景

• 在项目上线前，需要提供一批测试数据到数据库，数据需求是：每次修改缺陷重启项目后，测试数据会初始化成最初的数据

核心思想

• 在SpringBoot的架构中，DataSourceInitializer类可以在项目启动后初始化数据，我们可以通过自动执行自定义sql脚本初始化数据。通过自定义DataSourceInitializer Bean就可以实现按照业务要求执行特定的脚本。

使用

• 前提：项目数据源配置完成
• 方法
  • 通过@Configuration、@Bean和@Value三个注解实现自定义DataSourceInitializer Bean，现在Bean的定义中实现自动化执行脚本的业务逻辑。
  • 代码如下

package com.test.integration.rpc.initdata;

import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.io.Resource;
import org.springframework.jdbc.datasource.init.DataSourceInitializer;
import org.springframework.jdbc.datasource.init.DatabasePopulator;
import org.springframework.jdbc.datasource.init.ResourceDatabasePopulator;
import javax.sql.DataSource;

/**
 * @author test
 * @Description: 自定义初始化数据源
 * @date 2020/4/11
 */
@Configuration
public class CustomizeDataSourceInitializer {


    @Value("classpath:testSql/test_farms.sql")
    private Resource functionScriptFarms;
    @Value("classpath:testSql/test_miners.sql")
    private Resource functionScriptMiners;
    @Value("classpath:testSql/test_pool_config.sql")
    private Resource functionScriptPoolConfig;

    @Bean
    public DataSourceInitializer dataSourceInitializer(final DataSource dataSource) {
        final DataSourceInitializer initializer = new DataSourceInitializer();
        // 设置数据源
        initializer.setDataSource(dataSource);
        initializer.setDatabasePopulator(databasePopulator());
        return initializer;
    }

    private DatabasePopulator databasePopulator() {
        final ResourceDatabasePopulator populator = new ResourceDatabasePopulator();
        populator.addScripts(functionScriptFarms);
        populator.addScripts(functionScriptMiners);
        populator.addScripts(functionScriptPoolConfig);

        return populator;
    }

}

• • SQL脚本如下：例子test_pool_config.sql

delete from `pool_configs`;

INSERT INTO `pool_configs`(`pool_config_id`, `cdate`, `mdate`, `pool_config_mid` ) VALUES (1, '2020-04-10 18:02:54', '2020-04-10 18:02:54', 'bcf2a18a-b38b-4e3a-8852-7efbabc7954d');
INSERT INTO `pool_configs`(`pool_config_id`, `cdate`, `mdate`, `pool_config_mid` ) VALUES (2, '2020-04-10 18:02:54', '2020-04-10 18:02:54', 'bcf3a18a-b38b-4e3a-8852-7efbabc7954d');
INSERT INTO `pool_configs`(`pool_config_id`, `cdate`, `mdate`, `pool_config_mid` ) VALUES (3, '2020-04-10 18:02:54', '2020-04-10 18:02:54', 'bcf4a18a-b38b-4e3a-8852-7efbabc7954d');
INSERT INTO `pool_configs`(`pool_config_id`, `cdate`, `mdate`, `pool_config_mid` ) VALUES (4, '2020-04-10 18:02:54', '2020-04-10 18:02:54', 'bcf5a18a-b38b-4e3a-8852-7efbabc7954d');