Spring Boot创建多数据源

最新推荐文章于 2025-06-25 20:13:32 发布

原创最新推荐文章于 2025-06-25 20:13:32 发布 · 781 阅读

0 ·

CC 4.0 BY-SA版权

SpringBoot 专栏收录该内容

1 篇文章

订阅专栏

本文介绍了在Spring Boot中如何配置主从数据源，并详细讲述了在开发环境中正常运行，但在打包成jar后出现的问题。问题根源在于Mybatis无法扫描到Mapper.xml文件中的别名，解决方案是设置bean.setVfs(SpringBootVFS.class)。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

application-dev.yml中配置文件如下：主要配置了主库和从库直接看代码。

遇到的问题：1、 eclipse、idea中启动均正常。打成jar启动就报错。
解决办法：因为Mybatis无法扫描到xxxxMapper.xml中定义的别名。必须设置一下bean.setVfs(SpringBootVFS.class);

  
spring: 
  thymeleaf: 
    cache: false
  datasource:
    #主数据库 
    master:
      continueOnError: true
      type: com.alibaba.druid.pool.DruidDataSource
      #主库URL
      url: jdbc:mysql://localhost/master_db?useSSL=false
      username: root
      password: root
      driver-class-name: com.mysql.jdbc.Driver
      initialSize: 5
      minIdle: 5
      maxActive: 20
      maxWait: 60000
      timeBetweenEvictionRunsMillis: 60000
      validationQuery: SELECT 1
      testWhileIdle: true
      testOnBorrow: false
      testOnReturn: false
      poolPreparedStatements: true
      maxPoolPreparedStatementPerConnectionSize: 20
      filters: stat
      connectionProperties: druid.stat.mergeSql=true;druid.stat.slowSqlMillis=5000
    #从库
    slaver:
      continueOnError: true
      type: com.alibaba.druid.pool.DruidDataSource
      url: jdbc:mysql://localhost/slaver?useSSL=false
      username: root
      password: root
      driver-class-name: com.mysql.jdbc.Driver
      initialSize: 5
      minIdle: 5
      maxActive: 20
      maxWait: 60000
      timeBetweenEvictionRunsMillis: 60000
      validationQuery: SELECT 1
      testWhileIdle: true
      testOnBorrow: false
      testOnReturn: false
      poolPreparedStatements: true
      maxPoolPreparedStatementPerConnectionSize: 20
      filters: stat
      connectionProperties: druid.stat.mergeSql=true;druid.stat.slowSqlMillis=5000

主库的配置




import javax.sql.DataSource;

import org.apache.ibatis.session.SqlSessionFactory;
import org.mybatis.spring.SqlSessionFactoryBean;
import org.mybatis.spring.SqlSessionTemplate;
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.jdbc.DataSourceBuilder;
import org.springframework.boot.context.properties.ConfigurationProperties;
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;

@Configuration 
@MapperScan(basePackages = "com.sunxung.factoring.mapper", sqlSessionTemplateRef = "masterSqlSessionTemplate")
public class MasterDataSourceConfiguration {

    @Bean(name = "masterDataSource")
    @ConfigurationProperties(prefix = "spring.datasource.master")
    @Primary
    public DataSource dataSource() {
        return DataSourceBuilder.create().build();
    }

    @Bean(name = "masterSqlSessionFactory")
    @Primary
    public SqlSessionFactory sqlSessionFactory(@Qualifier("masterDataSource") DataSource dataSource) throws Exception {
        SqlSessionFactoryBean bean = new SqlSessionFactoryBean();
        bean.setDataSource(dataSource);
        bean.setConfiguration(config());
        bean.setTypeAliasesPackage("com.sunxung.factoring.entity");
        // 重点：eclipse、idea中启动均正常。打成jar启动就报错，Mybatis无法扫描到SpringBoot别名
        bean.setVfs(SpringBootVFS.class);
        bean.setMapperLocations(
                new PathMatchingResourcePatternResolver().getResources("classpath*:/mapper/**/*Mapper.xml"));
        return bean.getObject();
    }

    private org.apache.ibatis.session.Configuration config() {
        org.apache.ibatis.session.Configuration config = new org.apache.ibatis.session.Configuration();
        config.setMapUnderscoreToCamelCase(true);
        config.setUseGeneratedKeys(true);
        config.setDefaultFetchSize(100);
        config.setDefaultStatementTimeout(60);
        return config;
    }

    @Bean(name = "masterTransactionManager")
    @Primary
    public DataSourceTransactionManager transactionManager(@Qualifier("masterDataSource") DataSource dataSource) {
        return new DataSourceTransactionManager(dataSource);
    }

    @Bean(name = "masterSqlSessionTemplate")
    @Primary
    public SqlSessionTemplate sqlSessionTemplate(
            @Qualifier("masterSqlSessionFactory") SqlSessionFactory sqlSessionFactory) throws Exception {
        return new SqlSessionTemplate(sqlSessionFactory);
    }
}

slaverDataSourceConfig的配置


import javax.sql.DataSource;

import org.apache.ibatis.session.SqlSessionFactory;
import org.mybatis.spring.SqlSessionFactoryBean;
import org.mybatis.spring.SqlSessionTemplate;
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.jdbc.DataSourceBuilder;
import org.springframework.boot.context.properties.ConfigurationProperties;
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;


@Configuration
@MapperScan(basePackages = "com.sunxung.factoring.slavermapper", sqlSessionTemplateRef = "slaverSqlSessionTemplate")
public class SlaverDataSourceConfiguration {

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

    @Bean(name = "slaverSqlSessionFactory")
    public SqlSessionFactory sqlSessionFactory(@Qualifier("slaverDataSource") DataSource dataSource) throws Exception {
        SqlSessionFactoryBean bean = new SqlSessionFactoryBean();
        bean.setDataSource(dataSource);
        bean.setConfiguration(config());
        bean.setTypeAliasesPackage("com.sunxung.factoring.entity");
        bean.setVfs(SpringBootVFS.class);
        bean.setMapperLocations(
                new PathMatchingResourcePatternResolver().getResources("classpath*:/slavermapper/**/*Mapper.xml"));
        return bean.getObject();
    }

    private org.apache.ibatis.session.Configuration config() {
        org.apache.ibatis.session.Configuration config = new org.apache.ibatis.session.Configuration();
        config.setMapUnderscoreToCamelCase(true);
        config.setUseGeneratedKeys(true);
        config.setDefaultFetchSize(100);
        config.setDefaultStatementTimeout(60);
        return config;
    }

    @Bean(name = "slaverTransactionManager")
    public DataSourceTransactionManager transactionManager(@Qualifier("slaverDataSource") DataSource dataSource) {
        return new DataSourceTransactionManager(dataSource);
    }

    @Bean(name = "slaverSqlSessionTemplate")
    public SqlSessionTemplate sqlSessionTemplate(
            @Qualifier("slaverSqlSessionFactory") SqlSessionFactory sqlSessionFactory) throws Exception {
        return new SqlSessionTemplate(sqlSessionFactory);
    }
}