Springboot2.0配置多數據源

前提

本文針對SpringBoot2.0以上版本進行說明，本文的數據庫鏈接池採用的是HikariCP，首先在pom.xml中引入springboot的依賴

<dependencyManagement>
        <dependencies>
            <dependency>
                <!-- Import dependency management from Spring Boot -->
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-dependencies</artifactId>
                <version>2.0.7.RELEASE</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>

<dependencies>
      <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>
            <exclusions>
                <exclusion>
                    <groupId>org.springframework.boot</groupId>
                    <artifactId>spring-boot-starter-logging</artifactId>
                </exclusion>
            </exclusions>
        </dependency>

          <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-jdbc</artifactId>
            <exclusions>
                <exclusion>
                    <groupId>org.apache.tomcat</groupId>
                    <artifactId>tomcat-jdbc</artifactId>
                </exclusion>
            </exclusions>
        </dependency>

       <dependency>
            <groupId>com.zaxxer</groupId>
            <artifactId>HikariCP</artifactId>
            <version>${hikaricp.version}</version>
        </dependency>

        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
        </dependency>
    </dependencies>
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配置文件application.properties中以下配置.

## 第一數據源
spring.datasource.primary.jdbcUrl =jdbc:mysql://localhost/dv?useUnicode=true&characterEncoding=utf8&autoReconnect=true&failOverReadOnly=false&allowMultiQueries=true&useSSL=false
spring.datasource.primary.username=root
spring.datasource.primary.password=db123
spring.datasource.primary.driver-class-name=com.mysql.jdbc.Driver
spring.datasource.primary.minimumIdle=3
spring.datasource.primary.maximumPoolSize=6
spring.datasource.primary.maxLifetime=1500000
spring.datasource.primary.dataSourceProperties.prepStmtCacheSize=9
spring.datasource.primary.dataSourceProperties.prepStmtCacheSqlLimit=12
spring.datasource.primary.dataSourceProperties.cachePrepStmts=true
spring.datasource.primary.dataSourceProperties.useServerPrepStmts=true

## 第二數據源
spring.datasource.second.jdbcUrl =jdbc:mysql://localhost/dv?useUnicode=true&characterEncoding=utf8&autoReconnect=true&failOverReadOnly=false&allowMultiQueries=true&useSSL=false
spring.datasource.second.username=root
spring.datasource.second.password=db123
spring.datasource.second.driver-class-name=com.mysql.jdbc.Driver
spring.datasource.second.minimumIdle=3
spring.datasource.second.maximumPoolSize=6
spring.datasource.second.maxLifetime=1500000
spring.datasource.second.dataSourceProperties.prepStmtCacheSize=9
spring.datasource.second.dataSourceProperties.prepStmtCacheSqlLimit=12
spring.datasource.second.dataSourceProperties.cachePrepStmts=true
spring.datasource.second.dataSourceProperties.useServerPrepStmts=true
複製代碼

項目配置

新建主數據庫配置類PrimaryDataSourceConfig

import com.zaxxer.hikari.HikariConfig;
import com.zaxxer.hikari.HikariDataSource;
import org.springframework.beans.factory.annotation.Autowired;
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.jdbc.core.JdbcTemplate;
import org.springframework.transaction.annotation.EnableTransactionManagement;

import javax.sql.DataSource;

@Configuration
@ConfigurationProperties("spring.datasource.primary")
@EnableTransactionManagement
public class PrimaryDataSourceConfig extends HikariConfig {

    @Primary
    @Bean(name = "dsPrimary")
    public DataSource primaryDataSource() {
        return new HikariDataSource(this);
    }


    @Bean(name = "jdbcMaster")
    @Autowired
    public JdbcTemplate masterJdbcTemplate(@Qualifier("dsPrimary") DataSource dsMaster) {
        return new JdbcTemplate(dsMaster);
    }
}
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在新建第二數據源配置類SecondDataSourceConfig

import com.zaxxer.hikari.HikariConfig;
import com.zaxxer.hikari.HikariDataSource;
import org.springframework.beans.factory.annotation.Autowired;
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.jdbc.core.JdbcTemplate;
import org.springframework.transaction.annotation.EnableTransactionManagement;

import javax.sql.DataSource;

@Configuration
@ConfigurationProperties(prefix = "spring.datasource.second")
@EnableTransactionManagement
public class SecondDataSourceConfig extends HikariConfig {

    @Bean(name = "dsSecond")
    public DataSource secondDataSource() {
        return new HikariDataSource(this);
    }

    @Bean(name = "jdbcSecondary")
    @Autowired
    public JdbcTemplate secondaryJdbcTemplate(@Qualifier("dsSecond") DataSource dsMaster) {
        return new JdbcTemplate(dsMaster);
    }
}
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使用

在使用jdbcTemplate的地方，加入註解 @Qualifier("jdbcMaster") 或者 @Qualifier("jdbcSecondary")就可使用其對應的數據源操做數據庫了。