springboot和mybatis 配置多数据源

主数据源（由于代码没有办法复制的原因，下面图片和文字不一致）

package com.zhianchen.mysqlremark.toword.config;

import com.zaxxer.hikari.HikariDataSource;
import org.apache.ibatis.session.SqlSessionFactory;
import org.mybatis.spring.SqlSessionFactoryBean;
import org.mybatis.spring.annotation.MapperScan;
import org.mybatis.spring.mapper.MapperScannerConfigurer;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.beans.factory.annotation.Value;
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;
 
import javax.sql.DataSource;
 
 
/**
 * @program: test
 * @description:
* @author: chenzhian
 * @create: 2021-10-13 20:31:54
 * @version: 1.0
 **/
@Configuration
// 扫描 Mapper 接口并容器管理
// @MapperScan(basePackages = MasterDataSourceConfig.PACKAGE, sqlSessionFactoryRef = "masterSqlSessionFactory")
public class MasterDataSourceConfig {
 
 
    // 精确到 master 目录，以便跟其他数据源隔离
static final String PACKAGE = "com.zhianchen.mysqlremark.toword.dao";
    static final String MAPPER_LOCATION = "classpath:mapping/master/*.xml";

    @Primary
    @Bean(name = "masterDataSource")
    @ConfigurationProperties("spring.master.datasource")
    public DataSource masterDataSource() {
        return new HikariDataSource();
    }

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

    @Primary
    @Bean(name = "masterSqlSessionFactory")
    public SqlSessionFactory masterSqlSessionFactory(@Qualifier("masterDataSource") DataSource masterDataSource)
            throws Exception {
        final SqlSessionFactoryBean sessionFactory = new SqlSessionFactoryBean();
        sessionFactory.setDataSource(masterDataSource);
        sessionFactory.setMapperLocations(new PathMatchingResourcePatternResolver()
                .getResources(MasterDataSourceConfig.MAPPER_LOCATION));
        return sessionFactory.getObject();
    }

    /*  可以另外手动指定目录  */
@Bean(name="masterMapperScannerConfigurer")
    public MapperScannerConfigurer masterMapperScannerConfigurer(){
        MapperScannerConfigurer configurer = new MapperScannerConfigurer();
        configurer.setSqlSessionFactoryBeanName("masterSqlSessionFactory");
        configurer.setBasePackage(PACKAGE);
        return configurer;
    }
 
}

第二个数据源（由于代码没有办法复制的原因，下面图片和文字不一致）

package com.zhianchen.mysqlremark.toword.config;

import com.zaxxer.hikari.HikariDataSource;
import org.apache.ibatis.session.SqlSessionFactory;
import org.mybatis.spring.SqlSessionFactoryBean;
import org.mybatis.spring.annotation.MapperScan;
import org.mybatis.spring.mapper.MapperScannerConfigurer;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.beans.factory.annotation.Value;
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;
 
import javax.sql.DataSource;
 
 
/**
 * @program: test
 * @description:
* @author: chenzhian
 * @create: 2021-10-13 20:31:54
 * @version: 1.0
 **/
@Configuration
// 扫描 Mapper 接口并容器管理
// @MapperScan(basePackages = secondDataSourceConfig.PACKAGE, sqlSessionFactoryRef = "secondSqlSessionFactory")
public class SecondDataSourceConfig {
 
 
    // 精确到 second 目录，以便跟其他数据源隔离
static final String PACKAGE = "com.zhianchen.mysqlremark.toword.seconddao";
    static final String MAPPER_LOCATION = "classpath:mapping/second/*.xml";
 

 
    @Bean(name = "secondDataSource")
    @ConfigurationProperties("spring.second.datasource")
    public DataSource secondDataSource() {
        return new HikariDataSource();
    }
 
    @Bean(name = "secondTransactionManager")
    public DataSourceTransactionManager secondTransactionManager() {
        return new DataSourceTransactionManager(secondDataSource());
    }
 
    @Bean(name = "secondSqlSessionFactory")
    public SqlSessionFactory secondSqlSessionFactory(@Qualifier("secondDataSource") DataSource secondDataSource)
            throws Exception {
        final SqlSessionFactoryBean sessionFactory = new SqlSessionFactoryBean();
        sessionFactory.setDataSource(secondDataSource);
        sessionFactory.setMapperLocations(new PathMatchingResourcePatternResolver()
                .getResources(SecondDataSourceConfig.MAPPER_LOCATION));
        return sessionFactory.getObject();
    }

  /*  可以另外手动指定目录  */
@Bean(name="secondMapperScannerConfigurer")
  public MapperScannerConfigurer crwalerMapperScannerConfigurer(){
      MapperScannerConfigurer configurer = new MapperScannerConfigurer();
      configurer.setSqlSessionFactoryBeanName("secondSqlSessionFactory");
      configurer.setBasePackage(PACKAGE);
      return configurer;
  }

 
}

application.yml的配置

# master 数据源配置

master:

  datasource:

    url: jdbc:mysql://localhost:33306/mastertest?serverTimezone=GMT&useUnicode=true&characterEncoding=utf8

    driver-class-name: com.mysql.cj.jdbc.Driver

    username: sa

    password: sa!@123

    type: com.zaxxer.hikari.HikariDataSource

    minimum-idle: 5   #最小空闲连接数量

    maximum-pool-size: 50   #连接池中最大连接数

    max-lifetime: 180000  #连接最长生命周期,当连接存活时间达到30分钟之后会被关闭作退休处理

    idle-timeout: 30000   # 连接允许最长空闲时间,如果连接空闲时间超过1分钟,则会被关闭

    connection-timeout: 30000  客户端创建连接等待超时时间,如果30秒内没有获取连接则抛异常,不再继续等待

# second 数据源配置

second:

  datasource:

    url: jdbc:mysql://localhost:33306/sencondtest?serverTimezone=GMT&useUnicode=true&characterEncoding=utf8

    username: root

    password: 1q2w#E4r

    driver-class-name: com.mysql.cj.jdbc.Driver

    type: com.zaxxer.hikari.HikariDataSource

    minimum-idle: 5   #最小空闲连接数量

    maximum-pool-size: 50   #连接池中最大连接数

    max-lifetime: 180000  #连接最长生命周期,当连接存活时间达到30分钟之后会被关闭作退休处理

    idle-timeout: 30000   # 连接允许最长空闲时间,如果连接空闲时间超过1分钟,则会被关闭

    connection-timeout: 30000  客户端创建连接等待超时时间,如果30秒内没有获取连接则抛异常,不再继续等待

更多Hikari的配置请看最后的来源

Hikari是SpringBoot2.0以后默认使用的数据库连接池,如果是老的话可能会使用到Druid 用来做数据库连接池,下面是对两个的了解介绍

SpringBoot基础篇(二)连接池hikari和druid

HiKariCP和Druid对比使用整理自测

mybatis 配置多个数据源 org.apache.ibatis.binding.BindingException Vakud bound statement (not found)

原因是没有配置@MapperScan ,因为我这里是多个目录，所以也要配置多个，在Application的启动上面加

@MapperScan(value{"com.xxxx","com.aaaa"})

如果上面有用到MapperScannerConfigurer 就不需要这个了。

The bean 'xxxService' could not be injected as a 'com.xxxxImpl' because it is a JDK dynamic proxy that implements:
com.xxxxService

Action:

Consider injecting the bean as one of its interfaces or forcing the use of CGLib-based proxies by setting proxyTargetClass=true on @EnableAsync and/or @EnableCaching.

原因居然是因为用到是@Resouce 来直接调用ServiceImpl，造成程序加载的时候还没有Service的Impl实现类，让程序加载的时候找不到这个类

解决方案

改成调用Service 接口，另外把@Resouce 改成 @Autowired 就可以了。

资料整理来源