springboot+liquibase多数据源管理配置

1. 在项目中引入liquibase依赖
   maven仓库

• pom.xml引入方式

<!-- https://mvnrepository.com/artifact/org.liquibase/liquibase-core -->
<dependency>
    <groupId>org.liquibase</groupId>
    <artifactId>liquibase-core</artifactId>
    <version>3.5.3</version>
</dependency>

• gradle引入方式

// https://mvnrepository.com/artifact/org.liquibase/liquibase-core
compile group: 'org.liquibase', name: 'liquibase-core', version: '3.5.3'

2. springbbot中yml的数据源配置

spring:
  datasource:
    admin:
      username: root
      password: 123456
      jdbc-url: jdbc:mysql://localhost:3306/***数据库名称***?useUnicode=true&characterEncoding=UTF-8&useSSL=false&serverTimezone=GMT%2B8&allowMultiQueries=true
      driver-class-name: com.mysql.jdbc.Driver
      liquibase:
        change-log: classpath:db/admin/liquibase-master.yml
    web:
      username: root
      password: 123456
      jdbc-url: jdbc:mysql://localhost:3306/***数据库名称***?useUnicode=true&characterEncoding=UTF-8&useSSL=false&serverTimezone=GMT%2B8&allowMultiQueries=true
      driver-class-name: com.mysql.jdbc.Driver
      liquibase:
        change-log: classpath:db/web/liquibase-master.yml

• change-log： 配置要执行的liquibase相关的yml文件路径

3. 在项目中新增数据源config配置文件

• AdminSessionFactoryConfiguration

package com.cragc.admin.configuration.mybatis;

import liquibase.integration.spring.SpringLiquibase;
import org.apache.ibatis.session.SqlSessionFactory;
import org.mybatis.spring.SqlSessionFactoryBean;
import org.mybatis.spring.annotation.MapperScan;
import org.mybatis.spring.boot.autoconfigure.SpringBootVFS;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.boot.autoconfigure.liquibase.LiquibaseProperties;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.boot.jdbc.DataSourceBuilder;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Primary;
import org.springframework.core.io.support.PathMatchingResourcePatternResolver;
import org.springframework.jdbc.datasource.DataSourceTransactionManager;

import javax.sql.DataSource;

/**
 * @author Mr培
 */
@Configuration
@MapperScan(basePackages = "com.cragc.admin.domain.mapper.admin", sqlSessionFactoryRef = "adminSqlSessionFactory")
public class AdminSessionFactoryConfiguration {

    @Bean(name = "adminDataSource")
    @ConfigurationProperties(prefix = "spring.datasource.admin")
    public DataSource adminDataSource() {
        return DataSourceBuilder.create().build();
    }

    /**
     * 默认使用此事务管理器  如果不想使用 则使用 @Transactional(transactionManager = "transactionManagerWeb") 来指定其他的事务处理器
     * */
    @Bean(name = "transactionManagerAdmin")
    @Qualifier(value = "admin")
    @Primary
    public DataSourceTransactionManager transactionManagerAdmin() {
        return new DataSourceTransactionManager(adminDataSource());
    }

    @Bean(name = "adminSqlSessionFactory")
    public SqlSessionFactory activitySqlSessionFactory(@Qualifier("adminDataSource") DataSource dataSource) throws Exception {
        SqlSessionFactoryBean sfb = new SqlSessionFactoryBean();
        sfb.setDataSource(dataSource);
        sfb.setMapperLocations(new PathMatchingResourcePatternResolver().getResources("classpath:mappers/admin/**.xml"));
        //修改数据库的实体包路径
        sfb.setTypeAliasesPackage("com.****.admin.domain.model.admin");
        sfb.setVfs(SpringBootVFS.class);
        SqlSessionFactory factory = sfb.getObject();
        assert factory != null;
        factory.getConfiguration().setMapUnderscoreToCamelCase(true);
        return factory;
    }

    /**
     * 实现 liquibase在多数据源创建表结构
     * liquibase配置
     * */
    @Bean(name = "adminLiquibaseProperties")
    @ConfigurationProperties(prefix = "spring.datasource.admin.liquibase")
    public LiquibaseProperties adminLiquibaseProperties() {
        return new LiquibaseProperties();
    }

    @Bean(name = "adminLiquibase")
    public SpringLiquibase adminLiquibase() {
        return springLiquibase(adminDataSource(), adminLiquibaseProperties());
    }

    private static SpringLiquibase springLiquibase(DataSource dataSource, LiquibaseProperties properties) {
        SpringLiquibase liquibase = new SpringLiquibase();
        liquibase.setDataSource(dataSource);
        liquibase.setChangeLog(properties.getChangeLog());
        liquibase.setContexts(properties.getContexts());
        liquibase.setDefaultSchema(properties.getDefaultSchema());
        liquibase.setDropFirst(properties.isDropFirst());
        liquibase.setShouldRun(properties.isEnabled());
        liquibase.setLabels(properties.getLabels());
        liquibase.setChangeLogParameters(properties.getParameters());
        liquibase.setRollbackFile(properties.getRollbackFile());
        return liquibase;
    }

}

• WebSessionFactoryConfiguration

package com.cragc.admin.configuration.mybatis;

import liquibase.integration.spring.SpringLiquibase;
import org.apache.ibatis.session.SqlSessionFactory;
import org.mybatis.spring.SqlSessionFactoryBean;
import org.mybatis.spring.annotation.MapperScan;
import org.mybatis.spring.boot.autoconfigure.SpringBootVFS;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.boot.autoconfigure.liquibase.LiquibaseProperties;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.boot.jdbc.DataSourceBuilder;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.io.support.PathMatchingResourcePatternResolver;
import org.springframework.jdbc.datasource.DataSourceTransactionManager;

import javax.sql.DataSource;
import java.util.Objects;


/**
 * @author Mr培
 */
@Configuration
@MapperScan(basePackages = "com.cragc.admin.domain.mapper.web", sqlSessionFactoryRef = "webSqlSessionFactory")
public class WebSessionFactoryConfiguration {

    @Bean(name = "webDataSource")
    @ConfigurationProperties(prefix = "spring.datasource.web")
    public DataSource webDataSource() {
        return DataSourceBuilder.create().build();
    }

    @Qualifier(value = "web")
    @Bean(name = "transactionManagerWeb")
    public DataSourceTransactionManager transactionManagerWeb() {
        return new DataSourceTransactionManager(webDataSource());
    }

    @Bean(name = "webSqlSessionFactory")
    public SqlSessionFactory activitySqlSessionFactory(@Qualifier("webDataSource") DataSource dataSource) throws Exception {
        SqlSessionFactoryBean sfb = new SqlSessionFactoryBean();
        sfb.setDataSource(dataSource);
        sfb.setMapperLocations(new PathMatchingResourcePatternResolver().getResources("classpath:mappers/web/**.xml"));
        sfb.setTypeAliasesPackage("com.cragc.admin.domain.model.web");
        sfb.setVfs(SpringBootVFS.class);
        SqlSessionFactory factory = sfb.getObject();
        Objects.requireNonNull(factory).getConfiguration().setMapUnderscoreToCamelCase(true);
        return factory;
    }

    /**
     * liquibase配置
     * */
    @Bean(name = "webLiquibaseProperties")
    @ConfigurationProperties(prefix = "spring.datasource.web.liquibase")
    public LiquibaseProperties webLiquibaseProperties() {
        return new LiquibaseProperties();
    }

    @Bean(name = "webLiquibase")
    public SpringLiquibase webLiquibase() {
        return springLiquibase(webDataSource(), webLiquibaseProperties());
    }

    private static SpringLiquibase springLiquibase(DataSource dataSource, LiquibaseProperties properties) {
        SpringLiquibase liquibase = new SpringLiquibase();
        liquibase.setDataSource(dataSource);
        liquibase.setChangeLog(properties.getChangeLog());
        liquibase.setDefaultSchema(properties.getDefaultSchema());
        liquibase.setContexts(properties.getContexts());
        liquibase.setDropFirst(properties.isDropFirst());
        liquibase.setShouldRun(properties.isEnabled());
        liquibase.setChangeLogParameters(properties.getParameters());
        liquibase.setLabels(properties.getLabels());
        liquibase.setRollbackFile(properties.getRollbackFile());
        return liquibase;
    }

}

配置好后，启动项目，如果liquibase未启动成功，报错，一定要检查自己的liquibase数据结构是否正确