SpringBoot多数据源配置(hive/mysql)自测可以，重点

简介
在项目实践中，同一个项目可能需要整合多种数据源，把分散到各个数据库、数据表的数据都查询统计出来；
SpringBoot有默认的数据源配置，本篇博客将整合SpringBoot多数据源配置，包括mysql、hive等，通过jdbctemplate或mybatis进行使用；
版本配置(版本可自行选择，这里是博主的测试版本)：jdk1.8，springboot1.5.9，hive2.1.1，hadoop2.7.6，mysql5.7；

实践
首先，pom文件引入依赖：
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<java.version>1.8</java.version>
<spring.version>4.3.9.RELEASE</spring.version>
</properties>

<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.5.9.RELEASE</version>
</parent>

<dependencies>

<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>

<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
</dependency>


<dependency>
<groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId>
<version>1.3.2</version>
</dependency>


<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
</dependency>


<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid</artifactId>
<version>1.0.29</version>
</dependency>


<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-beans</artifactId>
</dependency>


<dependency>
<groupId>org.apache.hadoop</groupId>
<artifactId>hadoop-common</artifactId>
<version>2.6.0</version>
</dependency>

<dependency>
<groupId>org.apache.hadoop</groupId>
<artifactId>hadoop-mapreduce-client-core</artifactId>
<version>2.6.0</version>
</dependency>

<dependency>
<groupId>org.apache.hadoop</groupId>
<artifactId>hadoop-mapreduce-client-common</artifactId>
<version>2.6.0</version>
</dependency>

<dependency>
<groupId>org.apache.hadoop</groupId>
<artifactId>hadoop-hdfs</artifactId>
<version>2.6.0</version>
</dependency>

<dependency>
<groupId>jdk.tools</groupId>
<artifactId>jdk.tools</artifactId>
<version>1.8</version>
<scope>system</scope>
<systemPath>${JAVA_HOME}/lib/tools.jar</systemPath>
</dependency>

<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-configuration-processor</artifactId>
<optional>true</optional>
</dependency>


<dependency>
<groupId>org.apache.hive</groupId>
<artifactId>hive-jdbc</artifactId>
<version>2.1.1</version>
<exclusions>
<exclusion>
<groupId>org.eclipse.jetty.aggregate</groupId>
<artifactId>*</artifactId>
</exclusion>
</exclusions>
</dependency>

</dependencies>

yml配置多个数据源属性和数据库连接池通用属性：
#配置mybatis
mybatis:
mapperLocations: classpath:/com/springboot/sixmonth/dao/mapper/**/*.xml

#配置多个数据源属性(这里只配置两个，有需要可自行新增)
spring:
datasource:
mysqlMain: #mysql主数据源，可关联mybatis
type:
com.alibaba.druid.pool.DruidDataSource
url: jdbc:mysql://127.0.0.1:3306/master?useUnicode=true&characterEncoding=utf-8&zeroDateTimeBehavior=convertToNull&allowMultiQueries=true&useSSL=true&rewriteBatchedStatements=true
username: root
password: 1234
driver-class-name: com.mysql.jdbc.Driver
hive: #hive数据源
url: jdbc:hive2://47.100.200.200:9019/default
type: com.alibaba.druid.pool.DruidDataSource
username: sixmonth
password: sixmonth
driver-class-name: org.apache.hive.jdbc.HiveDriver
commonConfig: #连接池统一配置，应用到所有的数据源
initialSize: 1
minIdle: 1
maxIdle: 5
maxActive: 50
maxWait: 10000
timeBetweenEvictionRunsMillis: 10000
minEvictableIdleTimeMillis: 300000
validationQuery: select 'x'
testWhileIdle: true
testOnBorrow: false
testOnReturn: false
poolPreparedStatements: true
maxOpenPreparedStatements: 20
filters: stat

新建以下相关类：
HiveDruidConfig(hive数据库连接池配置)；
MysqlMainDruidConfig(mysql主数据源数据连接池配置)；
DataSourceCommonProperties(扩展连接池配置属性，应用到所有的数据源)；
DataSourceProperties(统一属性控制类，获取配置文件属性)；
HiveJdbcBaseDaoImpl(jdbctemplate注入hive数据源)；
MysqlMainJdbcBaseDaoImpl(jdbctemplate注入mysql数据源)；

新建HiveDruidConfig：
package com.springboot.sixmonth.common.config.druid.hive;

import java.sql.SQLException;

import javax.sql.DataSource;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.boot.context.properties.EnableConfigurationProperties;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import com.alibaba.druid.pool.DruidDataSource;
import com.springboot.sixmonth.common.config.druid.DataSourceCommonProperties;
import com.springboot.sixmonth.common.config.druid.DataSourceProperties;

/**
* -配置hive数据源
* @author sixmonth
* @Date 2019年5月18日
*
*/
@Configuration
@EnableConfigurationProperties({DataSourceProperties.class,DataSourceCommonProperties.class})//将配置类注入到bean容器，使ConfigurationProperties注解类生效
public class HiveDruidConfig {

private static Logger logger = LoggerFactory.getLogger(HiveDruidConfig.class);

@Autowired
private DataSourceProperties dataSourceProperties;

@Autowired
private DataSourceCommonProperties dataSourceCommonProperties;

@Bean("hiveDruidDataSource") //新建bean实例
@Qualifier("hiveDruidDataSource")//标识
public DataSource dataSource(){
DruidDataSource datasource = new DruidDataSource();

//配置数据源属性
datasource.setUrl(dataSourceProperties.getHive().get("url"));
datasource.setUsername(dataSourceProperties.getHive().get("username"));
datasource.setPassword(dataSourceProperties.getHive().get("password"));
datasource.setDriverClassName(dataSourceProperties.getHive().get("driver-class-name"));

//配置统一属性
datasource.setInitialSize(dataSourceCommonProperties.getInitialSize());
datasource.setMinIdle(dataSourceCommonProperties.getMinIdle());
datasource.setMaxActive(dataSourceCommonProperties.getMaxActive());
datasource.setMaxWait(dataSourceCommonProperties.getMaxWait());
datasource.setTimeBetweenEvictionRunsMillis(dataSourceCommonProperties.getTimeBetweenEvictionRunsMillis());
datasource.setMinEvictableIdleTimeMillis(dataSourceCommonProperties.getMinEvictableIdleTimeMillis());
datasource.setValidationQuery(dataSourceCommonProperties.getValidationQuery());
datasource.setTestWhileIdle(dataSourceCommonProperties.isTestWhileIdle());
datasource.setTestOnBorrow(dataSourceCommonProperties.isTestOnBorrow());
datasource.setTestOnReturn(dataSourceCommonProperties.isTestOnReturn());
datasource.setPoolPreparedStatements(dataSourceCommonProperties.isPoolPreparedStatements());
try {
datasource.setFilters(dataSourceCommonProperties.getFilters());
} catch (SQLException e) {
logger.error("Druid configuration initialization filter error.", e);
}
return datasource;
}

}

新建MysqlMainDruidConfig类：
package com.springboot.sixmonth.common.config.druid.mysqlMain;

import java.sql.SQLException;

import javax.sql.DataSource;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.boot.context.properties.EnableConfigurationProperties;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Primary;

import com.alibaba.druid.pool.DruidDataSource;
import com.springboot.sixmonth.common.config.druid.DataSourceCommonProperties;
import com.springboot.sixmonth.common.config.druid.DataSourceProperties;

/**
* -配置mysql主数据源，mysql连接默认主数据源
* @author sixmonth
* @Date 2019年5月18日
*
*/
@Configuration
@EnableConfigurationProperties({DataSourceProperties.class,DataSourceCommonProperties.class})//将配置类注入到bean容器，使ConfigurationProperties注解类生效
public class MysqlMainDruidConfig {

private static Logger logger = LoggerFactory.getLogger(MysqlMainDruidConfig.class);

@Autowired
private DataSourceProperties dataSourceProperties;

@Autowired
private DataSourceCommonProperties dataSourceCommonProperties;

@Primary //标明为主数据源，只能标识一个主数据源，mybatis连接默认主数据源
@Bean("mysqlDruidDataSource") //新建bean实例
@Qualifier("mysqlDruidDataSource")//标识
public DataSource dataSource(){
DruidDataSource datasource = new DruidDataSource();

//配置数据源属性
datasource.setUrl(dataSourceProperties.getMysqlMain().get("url"));
datasource.setUsername(dataSourceProperties.getMysqlMain().get("username"));
datasource.setPassword(dataSourceProperties.getMysqlMain().get("password"));
datasource.setDriverClassName(dataSourceProperties.getMysqlMain().get("driver-class-name"));

//配置统一属性
datasource.setInitialSize(dataSourceCommonProperties.getInitialSize());
datasource.setMinIdle(dataSourceCommonProperties.getMinIdle());
datasource.setMaxActive(dataSourceCommonProperties.getMaxActive());
datasource.setMaxWait(dataSourceCommonProperties.getMaxWait());
datasource.setTimeBetweenEvictionRunsMillis(dataSourceCommonProperties.getTimeBetweenEvictionRunsMillis());
datasource.setMinEvictableIdleTimeMillis(dataSourceCommonProperties.getMinEvictableIdleTimeMillis());
datasource.setValidationQuery(dataSourceCommonProperties.getValidationQuery());
datasource.setTestWhileIdle(dataSourceCommonProperties.isTestWhileIdle());
datasource.setTestOnBorrow(dataSourceCommonProperties.isTestOnBorrow());
datasource.setTestOnReturn(dataSourceCommonProperties.isTestOnReturn());
datasource.setPoolPreparedStatements(dataSourceCommonProperties.isPoolPreparedStatements());
try {
datasource.setFilters(dataSourceCommonProperties.getFilters());
} catch (SQLException e) {
logger.error("Druid configuration initialization filter error.", e);
}
return datasource;
}

}

新建DataSourceCommonProperties类：
package com.springboot.sixmonth.common.config.druid;

import org.springframework.boot.context.properties.ConfigurationProperties;

/**
* -扩展连接池，通用配置属性，可应用到所有数据源
* @author sixmonth
* @Date 2019年5月18日
*
*/
@ConfigurationProperties(prefix = DataSourceCommonProperties.DS, ignoreUnknownFields = false)
public class DataSourceCommonProperties {
final static String DS = "spring.datasource.commonConfig";

private int initialSize = 10;
private int minIdle;
private int maxIdle;
private int maxActive;
private int maxWait;
private int timeBetweenEvictionRunsMillis;
private int minEvictableIdleTimeMillis;
private String validationQuery;
private boolean testWhileIdle;
private boolean testOnBorrow;
private boolean testOnReturn;
private boolean poolPreparedStatements;
private int maxOpenPreparedStatements;
private String filters;

private String mapperLocations;
private String typeAliasPackage;

//为节省空间，这里省略set和get方法，可自行添加

}

新建DataSourceProperties类：
package com.springboot.sixmonth.common.config.druid;

import java.util.Map;

import org.springframework.boot.context.properties.ConfigurationProperties;

/**
* -统一属性控制类，获取配置文件属性
* @author sixmonth
* @Date 2019年5月18日
*
*/
@ConfigurationProperties(prefix = DataSourceProperties.DS, ignoreUnknownFields = false)
public class DataSourceProperties {
final static String DS = "spring.datasource";

private Map<String,String> mysqlMain;

private Map<String,String> hive;

private Map<String,String> commonConfig;

//为节省空间，这里省略set和get方法，可自行添加

}

新建HiveJdbcBaseDaoImpl类：
package com.springboot.sixmonth.common.config.jdbcConfig;

import javax.sql.DataSource;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.stereotype.Repository;

/**
* -注入hive数据源
* @author sixmonth
* @Date 2019年5月18日
*
*/
@Repository
public class HiveJdbcBaseDaoImpl {

private JdbcTemplate jdbcTemplate;

public JdbcTemplate getJdbcTemplate() {
return jdbcTemplate;
}

@Autowired
public void setJdbcTemplate(@Qualifier("hiveDruidDataSource") DataSource dataSource) {
this.jdbcTemplate = new JdbcTemplate(dataSource);
}

}

新建MysqlMainJdbcBaseDaoImpl类：
package com.springboot.sixmonth.common.config.jdbcConfig;

import javax.sql.DataSource;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.stereotype.Repository;

/**
* -注入jdbctemplate
* @author sixmonth
* 2018年11月12日
*/
@Repository
public class MysqlMainJdbcBaseDaoImpl {

private JdbcTemplate jdbcTemplate;

public JdbcTemplate getJdbcTemplate() {
return jdbcTemplate;
}

@Autowired
public void setJdbcTemplate(@Qualifier("mysqlDruidDataSource") DataSource dataSource) {
this.jdbcTemplate = new JdbcTemplate(dataSource);
}

}

新建测试类TestDao，测试jdbcTemplate连接使用mysql：
package com.springboot.sixmonth.dao.jdbcDao.test;

import org.springframework.stereotype.Repository;

import com.springboot.sixmonth.common.config.jdbcConfig.MysqlMainJdbcBaseDaoImpl;

/**
* -测试jdbc连接
* @author sixmonth
* @Date 2019年5月20日
*
*/
@Repository
public class TestDao extends MysqlMainJdbcBaseDaoImpl{

/**
* -测试类
* @return
*/
public String test() {
String sql = "SELECT username from sys_user where username='admin'";
String param = this.getJdbcTemplate().queryForObject(sql,String.class);
return param;
}

}

新建测试类TestHiveDao，测试jdbcTmplate连接使用hive：
package com.springboot.sixmonth.dao.jdbcDao.test;

import org.springframework.stereotype.Repository;
import com.springboot.sixmonth.common.config.jdbcConfig.HiveJdbcBaseDaoImpl;

/**
* -测试hive连接
* @author sixmonth
* @Date 2019年5月18日
*
*/
@Repository
public class TestHiveDao extends HiveJdbcBaseDaoImpl{

/**
* 测试获取hive数据库数据信息
* @return
*/
public String test() {
String sql = "SELECT name from sixmonth limit 1";
String param = this.getJdbcTemplate().queryForObject(sql,String.class);
return param;
}

}

使用方法：
@Autowired
private TestDao testDao;

@Autowired
private TestHiveDao testHiveDao;

总结
SpringBoot可以配置多个mysql数据源，也可以配置多种数据源，比如hive、oracle等，需要可自行添加；
在整合mybatis的时候需要标明主数据源，默认使用数据源；
实践是检验认识真理性的唯一标准，自己动手，丰衣足食~~

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版权声明：本文为CSDN博主「尘光掠影」的原创文章，遵循CC 4.0 BY-SA版权协议，转载请附上原文出处链接及本声明。
原文链接：https://blog.csdn.net/alan_liuyue/article/details/90370844