SpringBoot-多数据源配置-Mysql-SqlServer-Oracle

Maven依赖

        <!-- mysql的jdbc依赖 -->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>8.0.16</version>
        </dependency>
        <!-- sqlserver的jdbc依赖 -->
        <dependency>
            <groupId>com.microsoft.sqlserver</groupId>
            <artifactId>mssql-jdbc</artifactId>
            <version>7.4.1.jre8</version>
        </dependency>

application.yml配置

注意是jdbc-url不是url,否则报jdbcUrl is required with driverClassName错误

spring:
  application:
    name: demo-multi-datasource
  datasource:
    mysql:
      jdbc-url: jdbc:mysql://localhost:3306/demo?characterEncoding=utf-8&useSSL=false&serverTimezone=UTC&nullCatalogMeansCurrent=true
      username: root
      password: root
      driver-class-name: com.mysql.cj.jdbc.Driver
    mssql:
      jdbc-url: jdbc:sqlserver://localhost:1433;databasename=demo
      username: sa
      password: sa
      driver-class-name: com.microsoft.sqlserver.jdbc.SQLServerDriver

mysql配置类

其中com.htkm.demo.mysql.dao是DAO层，

com/htkm/demo/mysql/mapping/dao/是映射文件目录

package com.htkm.demo.mysql.config;

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

/**
 * @author viwofer
 * @created 2019-12-25 21:44
 */
@Configuration(value="mysql")
@MapperScan(basePackages = "com.htkm.demo.mysql.dao", sqlSessionFactoryRef = "MysqlSqlSessionFactory")
public class DataSourceConfig {
    @Bean(name = "MysqlDataSource")
    @ConfigurationProperties(prefix = "spring.datasource.mysql")
    public DataSource getDateSource() {
        return DataSourceBuilder.create().build();
    }

    /**
     * 配置事务管理
     */
    @Bean(name = "MysqlTransactionManager")
    public DataSourceTransactionManager testTransactionManager(@Qualifier("MysqlDataSource") DataSource dataSource) {
        return new DataSourceTransactionManager(dataSource);
    }
    /**
     * 配置工厂
     * @param datasource
     * @return
     * @throws Exception
     */
    @Bean(name = "MysqlSqlSessionFactory")
    public SqlSessionFactory testSqlSessionFactory(@Qualifier("MysqlDataSource") DataSource datasource)
            throws Exception {
        SqlSessionFactoryBean bean = new SqlSessionFactoryBean();
        bean.setDataSource(datasource);
        bean.setMapperLocations(
                new PathMatchingResourcePatternResolver().getResources("classpath*:com/htkm/demo/mysql/mapping/dao/*.xml"));
        return bean.getObject();
    }

    /**
     * 配置会话
     * @param sessionfactory
     * @return
     */
    @Bean("MysqlSqlSessionTemplate")
    public SqlSessionTemplate testsqlsessiontemplate(
            @Qualifier("MysqlSqlSessionFactory") SqlSessionFactory sessionfactory) {
        return new SqlSessionTemplate(sessionfactory);
    }
}

mssql配置类

其中com.htkm.demo.mssql.dao是DAO层，

com/htkm/demo/mssql/mapping/dao/是映射文件目录

package com.htkm.demo.mssql.config;

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

/**
 * @author viwofer
 * @created 2019-12-25 21:44
 */
@Configuration(value = "mssql")
@MapperScan(basePackages = "com.htkm.demo.mssql.dao", sqlSessionFactoryRef = "MssqlSqlSessionFactory")
public class DataSourceConfig {
    /**
     * 配置数据源
     * @return
     */
    @Bean(name = "MssqlDataSource")
    @ConfigurationProperties(prefix = "spring.datasource.mssql")
    public DataSource getDateSource() {
        return DataSourceBuilder.create().build();
    }

    /**
     * 配置事务管理
     */
    @Bean(name = "MssqlTransactionManager")
    public DataSourceTransactionManager testTransactionManager(@Qualifier("MssqlDataSource") DataSource dataSource) {
        return new DataSourceTransactionManager(dataSource);
    }

    /**
     * 配置工厂
     * @param datasource
     * @return
     * @throws Exception
     */
    @Bean(name = "MssqlSqlSessionFactory")
    public SqlSessionFactory testSqlSessionFactory(@Qualifier("MssqlDataSource") DataSource datasource)
            throws Exception {
        SqlSessionFactoryBean bean = new SqlSessionFactoryBean();
        bean.setDataSource(datasource);
        bean.setMapperLocations(
                new PathMatchingResourcePatternResolver().getResources("classpath*:com/htkm/demo/mssql/mapping/dao/*.xml"));
        return bean.getObject();
    }

    /**
     * 配置会话
     * @param sessionfactory
     * @return
     */
    @Bean("MssqlSqlSessionTemplate")
    public SqlSessionTemplate testsqlsessiontemplate(
            @Qualifier("MssqlSqlSessionFactory") SqlSessionFactory sessionfactory) {
        return new SqlSessionTemplate(sessionfactory);
    }
}

Oracle配置

首先要得到Oracle JDBC Driver

1.通过Oracle官方网站下载相应版本：

https://www.oracle.com/database/technologies/appdev/jdbc-downloads.html

2.通过Oracle的安装目录获得，位置在“{ORACLE_HOME}\jdbc\lib\ojdbc14.jar”

手动安装安装

命令如下：

mvn install:install-file -Dfile={Path/to/your/ojdbc.jar} -DgroupId=com.oracle -DartifactId=ojdbc6 -Dversion=11.2.0 -Dpackaging=jar

pom.xml添加依赖

<dependencies>
    <!-- 添加oracle jdbc driver -->
    <dependency>
        <groupId>com.oracle</groupId>
        <artifactId>ojdbc8</artifactId>
        <version>11.2.0.4.0</version>
    </dependency>
  </dependencies>
<!--报错不支持字符集用这个-->
<!-- https://mvnrepository.com/artifact/cn.easyproject/orai18n -->
<dependency>
   <groupId>cn.easyproject</groupId>
   <artifactId>orai18n</artifactId>
   <version>12.1.0.2.0</version>
</dependency>

application.ym配置

spring.datasource.jdbc-url=jdbc:oracle:thin:@localhost:1521:data
spring.datasource.username=xxx
spring.datasource.password=xxx
spring.datasource.driver-class-name=oracle.jdbc.driver.OracleDriver

jdbcUrl is required with driverClassName

错误：Cause: java.lang.IllegalArgumentException: jdbcUrl is required with driverClassName.

application.yml：

spring:
  application:
    name: demo-multi-datasource
  datasource:
    mysql:
      url: jdbc:mysql://localhost:3306/demo?characterEncoding=utf-8&useSSL=false&serverTimezone=UTC&nullCatalogMeansCurrent=true
      username: root
      password: root
      driver-class-name: com.mysql.cj.jdbc.Driver
    mssql:
      url: jdbc:sqlserver://localhost:1433;databasename=demo
      username: sa
      password: sa
      driver-class-name: com.microsoft.sqlserver.jdbc.SQLServerDriver

将url更改为jdbc-url

spring:
  application:
    name: demo-multi-datasource
  datasource:
    mysql:
      jdbc-url: jdbc:mysql://localhost:3306/demo?characterEncoding=utf-8&useSSL=false&serverTimezone=UTC&nullCatalogMeansCurrent=true
      username: root
      password: root
      driver-class-name: com.mysql.cj.jdbc.Driver
    mssql:
      jdbc-url: jdbc:sqlserver://localhost:1433;databasename=demo
      username: sa
      password: sa
      driver-class-name: com.microsoft.sqlserver.jdbc.SQLServerDriver

spring.datasource.url 数据库的 JDBC URL。

spring.datasource.jdbc-url 用来重写自定义连接池

官方文档的解释是：

因为连接池的实际类型没有被公开，所以在您的自定义数据源的元数据中没有生成密钥，而且在IDE中没有完成(因为DataSource接口没有暴露属性)。另外，如果您碰巧在类路径上有Hikari，那么这个基本设置就不起作用了，因为Hikari没有url属性(但是确实有一个jdbcUrl属性)。在这种情况下，您必须重写您的配置。