spring boot druid mybatis多数据源

一、关闭数据源自动配置（很关键）

@SpringBootApplication(exclude = { DataSourceAutoConfiguration.class })

如果不关闭会报异常：org.springframework.beans.factory.BeanCurrentlyInCreationException: Error creating bean with name 'dataSource': Requested bean is currently in creation: Is there an unresolvable circular reference?

ps：之前一直没折腾成功，竟然就是少了这一个配置，泪奔

二、配置文件

spring.datasource.druid.one.driver-class-name=com.mysql.jdbc.Driver
spring.datasource.druid.one.url=
spring.datasource.druid.one.username=
spring.datasource.druid.one.password=

spring.datasource.druid.two.driver-class-name=com.mysql.jdbc.Driver
spring.datasource.druid.two.url=
spring.datasource.druid.two.username=
spring.datasource.druid.two.password=

三、数据源定义

    @Bean
    @ConfigurationProperties("spring.datasource.druid.one")
    public DataSource dataSource1() throws Exception {
        return DruidDataSourceBuilder.create().build();
    }

    @Bean
    @ConfigurationProperties("spring.datasource.druid.two")
    public DataSource dataSource2() throws Exception {
        return DruidDataSourceBuilder.create().build();
    }

四、多数据类定义

package com.qmtt.config;

import org.springframework.jdbc.datasource.lookup.AbstractRoutingDataSource;

public class DynamicDataSource extends AbstractRoutingDataSource {

    @Override
    protected Object determineCurrentLookupKey() {
        return DynamicDataSourceHolder.getDataSourceKey();
    }

}

五、ThreadLocal定义

package com.qmtt.config;

import java.util.HashSet;
import java.util.Set;

public class DynamicDataSourceHolder {

    private static final ThreadLocal<String> dataSourceThreadLocal = new ThreadLocal<String>();

    private static Set<String> dataSourceKeys = new HashSet<String>();

    static {
        dataSourceKeys.add("master");
        dataSourceKeys.add("slave");
    }

    public static void setDataSourceKey(String dataSourceKey) {
        dataSourceThreadLocal.set(dataSourceKey);
    }

    public static String getDataSourceKey() {
        return dataSourceThreadLocal.get();
    }

    public static void clearDataSourceKey() {
        dataSourceThreadLocal.remove();
    }

    public static boolean containsDataSourceKey(String dataSourceKey) {
        return dataSourceKeys.contains(dataSourceKey);
    }
}

六、数据源定义

    @Bean
    public DataSource dataSource(@Qualifier("dataSource1") DataSource dataSource1,
            @Qualifier("dataSource2") DataSource dataSource2) throws Exception {
        DynamicDataSource dynamicDataSource = new DynamicDataSource();
        // 创建默认数据源
        dynamicDataSource.setDefaultTargetDataSource(dataSource1());
        // 配置多数据源
        Map<Object, Object> dataSourceMap = new HashMap<>(4);
        dataSourceMap.put("master", dataSource1);
        dataSourceMap.put("slave", dataSource2);
        dynamicDataSource.setTargetDataSources(dataSourceMap);
        return dynamicDataSource;
    }

七、SqlSessionFactory定义

常规写法

八、AOP切换

Aspect拦截dao就行

第一步很关键