SpringBoot整合多数据源

SpringBoot整合多数据源

在实际企业项目开发中，我们经常会在SpringBoot项目中配置多数据源，一方面可以减缓数据库压力，另一方面可以也是业务需求的场景

下面就来看看如何在SpringBoot项目中配置多数据源

POM

在配置多数据源之前，我们需要引入一些依赖

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0modelVersion>
    <groupId>com.examplegroupId>
    <artifactId>zsxq_serverartifactId>
    <version>0.0.1-SNAPSHOTversion>
    <name>zsxq_servername>

    <description>zsxq_serverdescription>

    <properties>
        <java.version>1.8java.version>
        <project.build.sourceEncoding>UTF-8project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8project.reporting.outputEncoding>
        <spring-boot.version>3.0.2spring-boot.version>
    properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.bootgroupId>
            <artifactId>spring-boot-starter-data-redisartifactId>
        dependency>
        
        <dependency>
            <groupId>org.springframework.bootgroupId>
            <artifactId>spring-boot-starter-data-redis-reactiveartifactId>
        dependency>
        
        <dependency>
            <groupId>org.springframework.bootgroupId>
            <artifactId>spring-boot-starter-webartifactId>
        dependency>
        
        <dependency>
            <groupId>org.projectlombokgroupId>
            <artifactId>lombokartifactId>
        dependency>

        <dependency>
            <groupId>org.springframework.bootgroupId>
            <artifactId>spring-boot-starter-testartifactId>
            <scope>testscope>
        dependency>
        
        <dependency>
            <groupId>org.apache.commonsgroupId>
            <artifactId>commons-lang3artifactId>
        dependency>
        
        
        <dependency>
            <groupId>org.springframework.bootgroupId>
            <artifactId>spring-boot-starter-data-jdbcartifactId>
        dependency>
        
        <dependency>
            <groupId>mysqlgroupId>
            <artifactId>mysql-connector-javaartifactId>
            <scope>runtimescope>
        dependency>

        
        <dependency>
            <groupId>com.dmgroupId>
            <artifactId>DmJdbcDriverartifactId>
            <version>1.8.0version>
        dependency>

    dependencies>
    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.bootgroupId>
                <artifactId>spring-boot-dependenciesartifactId>
                <version>${spring-boot.version}version>
                <type>pomtype>
                <scope>importscope>
            dependency>
        dependencies>
    dependencyManagement>

    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.pluginsgroupId>
                <artifactId>maven-compiler-pluginartifactId>
                <configuration>
                    <source>17source>
                    <target>17target>
                    <encoding>UTF-8encoding>
                configuration>
            plugin>
            <plugin>
                <groupId>org.springframework.bootgroupId>
                <artifactId>spring-boot-maven-pluginartifactId>
                <version>${spring-boot.version}version>
                <configuration>
                    <includeSystemScope>trueincludeSystemScope>
                configuration>
                <executions>
                    <execution>
                        <id>repackageid>
                        <goals>
                            <goal>repackagegoal>
                        goals>
                    execution>
                executions>
            plugin>
        plugins>
    build>

project>

这里主要引入MySQL连接驱动包，达梦数据库连接驱动包，做这两个数据库的多数据源配置

YML

依赖引入后就可以配置YML文件，多数据源的主要配置都在这里

spring:
  data:
    redis:
      host: 127.0.0.1
      port: 6379
      password:
  datasource:
    db1:
      driver-class-name: com.mysql.cj.jdbc.Driver
      jdbc-url: jdbc:mysql://localhost:3306/com?useSSL=false&useServerPrepStmts=true
      username: root
      password: root
    db2:
      driver-class-name: dm.jdbc.driver.DmDriver
      jdbc-url: jdbc:dm://127.0.0.1:5236/SYSDBA?zeroDateTimeBehavior=convertToNull&useUnicode=true&characterEncoding=UTF-8
      username: SYSDBA
      password: SYSDBA

DataSourceConfig

这个配置文件用来配置创建不同数据库的数据源

package com.example.config;

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.context.annotation.Primary;
import org.springframework.jdbc.core.JdbcTemplate;

import javax.sql.DataSource;

@Configuration
public class DataSourceConfig {

    @Primary
    @Bean(name = "primaryDataSource")
    @Qualifier("primaryDataSource")
    @ConfigurationProperties(prefix="spring.datasource.db1")
    public DataSource primaryDataSource() {
        return DataSourceBuilder.create().build();
    }

    @Bean(name = "secondaryDataSource")
    @Qualifier("secondaryDataSource")
    @ConfigurationProperties(prefix="spring.datasource.db2")
    public DataSource secondaryDataSource() {
        return DataSourceBuilder.create().build();
    }

    @Bean(name="primaryJdbcTemplate")
    public JdbcTemplate primaryJdbcTemplate (
            @Qualifier("primaryDataSource") DataSource dataSource ) {
        return new JdbcTemplate(dataSource);
    }

    @Bean(name="secondaryJdbcTemplate")
    public JdbcTemplate secondaryJdbcTemplate(
            @Qualifier("secondaryDataSource") DataSource dataSource) {
        return new JdbcTemplate(dataSource);
    }

}

用法

通过使用不同jdbcTemplate来访问不同的数据库

//从MySQL数据库获取数据
resultData = primaryJdbcTemplate.queryForList(checkSql);

//从达梦数据库获取数据
resultData = secondaryJdbcTemplate.queryForList(checkSql);