Spring Boot多数据源MultiDataSource配置（最全）

最新推荐文章于 2020-09-11 17:16:13 发布

原创最新推荐文章于 2020-09-11 17:16:13 发布 · 5.2k 阅读

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#多数据源 #druid #MultiDataSource #springboot

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本文介绍如何在SpringBoot项目中配置并使用多个数据源，包括MySQL和Oracle，通过Druid连接池进行管理，实现不同数据库间的操作。

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application.yml

server:
  context-path: /web

spring:
  datasource:
    druid:
      # 数据库访问配置, 使用druid数据源
      # 数据源1 mysql
      mysql:
        type: com.alibaba.druid.pool.DruidDataSource
        driver-class-name: com.mysql.jdbc.Driver
        url: jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=UTF-8&rewriteBatchedStatements=true&autoReconnect=true&failOverReadOnly=false&zeroDateTimeBehavior=convertToNull
        username: root
        password: 123456
      # 数据源2 oracle
      oracle: 
        type: com.alibaba.druid.pool.DruidDataSource
        driver-class-name: oracle.jdbc.driver.OracleDriver
        url: jdbc:oracle:thin:@localhost:1521:ORCL
        username: test
        password: 123456
        
      # 连接池配置
      initial-size: 5
      min-idle: 5
      max-active: 20
      # 连接等待超时时间
      max-wait: 30000
      # 配置检测可以关闭的空闲连接间隔时间
      time-between-eviction-runs-millis: 60000
      # 配置连接在池中的最小生存时间
      min-evictable-idle-time-millis: 300000
      validation-query: select '1' from dual
      test-while-idle: true
      test-on-borrow: false
      test-on-return: false
      # 打开PSCache，并且指定每个连接上PSCache的大小
      pool-prepared-statements: true
      max-open-prepared-statements: 20
      max-pool-prepared-statement-per-connection-size: 20
      # 配置监控统计拦截的filters, 去掉后监控界面sql无法统计, 'wall'用于防火墙
      filters: stat,wall
      # Spring监控AOP切入点，如x.y.z.service.*,配置多个英文逗号分隔
      aop-patterns: com.springboot.servie.*
      
    
      # WebStatFilter配置
      web-stat-filter:
        enabled: true
        # 添加过滤规则
        url-pattern: /*
        # 忽略过滤的格式
        exclusions: '*.js,*.gif,*.jpg,*.png,*.css,*.ico,/druid/*'
      
      # StatViewServlet配置 
      stat-view-servlet:
        enabled: true
        # 访问路径为/druid时，跳转到StatViewServlet
        url-pattern: /druid/*
        # 是否能够重置数据
        reset-enable: false
        # 需要账号密码才能访问控制台
        login-username: druid
        login-password: druid123
        # IP白名单
        # allow: 127.0.0.1
        #　IP黑名单（共同存在时，deny优先于allow）
        # deny: 192.168.1.218
      
      # 配置StatFilter
      filter: 
        stat: 
          log-slow-sql: true

```
MysqlDatasourceConfig.java
```

package com.springboot.datasource;

import javax.sql.DataSource;

import org.apache.ibatis.session.SqlSessionFactory;
import org.mybatis.spring.SqlSessionFactoryBean;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.beans.factory.annotation.Qualifier;
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 com.alibaba.druid.spring.boot.autoconfigure.DruidDataSourceBuilder;

@Configuration
@MapperScan(basePackages = MysqlDatasourceConfig.PACKAGE, sqlSessionFactoryRef = "mysqlSqlSessionFactory")
public class MysqlDatasourceConfig {

	// mysqldao扫描路径
	static final String PACKAGE = "com.springboot.mysqldao";
	// mybatis mapper扫描路径
	static final String MAPPER_LOCATION = "classpath:mapper/mysql/*.xml";

	@Primary
	@Bean(name = "mysqldatasource")
	@ConfigurationProperties("spring.datasource.druid.mysql")
	public DataSource mysqlDataSource() {
		return DruidDataSourceBuilder.create().build();
	}

	@Bean(name = "mysqlTransactionManager")
	@Primary
	public DataSourceTransactionManager mysqlTransactionManager() {
		return new DataSourceTransactionManager(mysqlDataSource());
	}

	@Bean(name = "mysqlSqlSessionFactory")
	@Primary
	public SqlSessionFactory mysqlSqlSessionFactory(@Qualifier("mysqldatasource") DataSource dataSource)
			throws Exception {
		final SqlSessionFactoryBean sessionFactory = new SqlSessionFactoryBean();
		sessionFactory.setDataSource(dataSource);
		//如果不使用xml的方式配置mapper，则可以省去下面这行mapper location的配置。
		sessionFactory.setMapperLocations(
				new PathMatchingResourcePatternResolver().getResources(MysqlDatasourceConfig.MAPPER_LOCATION));
		return sessionFactory.getObject();
	}
}

```
OracleDatasourceConfig
```

package com.springboot.datasource;

import javax.sql.DataSource;

import org.apache.ibatis.session.SqlSessionFactory;
import org.mybatis.spring.SqlSessionFactoryBean;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.beans.factory.annotation.Qualifier;
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;

import com.alibaba.druid.spring.boot.autoconfigure.DruidDataSourceBuilder;

@Configuration
@MapperScan(basePackages = OracleDatasourceConfig.PACKAGE, 
	sqlSessionFactoryRef = "oracleSqlSessionFactory")
public class OracleDatasourceConfig {
	
	// oracledao扫描路径
	static final String PACKAGE = "com.springboot.oracledao"; 
	// mybatis mapper扫描路径
	static final String MAPPER_LOCATION = "classpath:mapper/oracle/*.xml";
	
	@Bean(name = "oracledatasource")
	@ConfigurationProperties("spring.datasource.druid.oracle")
	public DataSource oracleDataSource() {
		return DruidDataSourceBuilder.create().build();
	}
	
	@Bean(name = "oracleTransactionManager")
    public DataSourceTransactionManager oracleTransactionManager() {
        return new DataSourceTransactionManager(oracleDataSource());
    }
 
    @Bean(name = "oracleSqlSessionFactory")
    public SqlSessionFactory oracleSqlSessionFactory(@Qualifier("oracledatasource") DataSource dataSource) throws Exception {
        final SqlSessionFactoryBean sessionFactory = new SqlSessionFactoryBean();
        sessionFactory.setDataSource(dataSource);
        //如果不使用xml的方式配置mapper，则可以省去下面这行mapper location的配置。
        sessionFactory.setMapperLocations(new PathMatchingResourcePatternResolver()
                .getResources(OracleDatasourceConfig.MAPPER_LOCATION));
        return sessionFactory.getObject();
    }
}

```
StudentServiceImp.java
```

package com.springboot.service.impl;

import java.util.List;
import java.util.Map;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import com.springboot.mysqldao.MysqlStudentMapper;
import com.springboot.oracledao.OracleStudentMapper;
import com.springboot.service.StudentService;

@Service("studentService")
public class StudentServiceImp implements StudentService{
	@Autowired
	private OracleStudentMapper oracleStudentMapper;
	@Autowired
	private MysqlStudentMapper mysqlStudentMapper;
	
	@Override
	public List<Map<String, Object>> getAllStudentsFromOralce() {
		return this.oracleStudentMapper.getAllStudents();
	}

	@Override
	public List<Map<String, Object>> getAllStudentsFromMysql() {
		return this.mysqlStudentMapper.getAllStudents();
	}

}

```
StudentService.java
```

package com.springboot.service;

import java.util.List;
import java.util.Map;

public interface StudentService {
	List<Map<String, Object>> getAllStudentsFromOralce();
	List<Map<String, Object>> getAllStudentsFromMysql();
}

启动文件Application

package com.springboot;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;


@SpringBootApplication
public class Application {
	
	public static void main(String[] args) {
		SpringApplication.run(Application.class,args);
	}
}

剩下一些未粘贴文件就是controller、seivice和mybatis的xml文件了这个简单自行书写，手动滑稽

如果需要交流下方评论见！！！

不对地方请多指教，感谢您阅读我的博客谢谢