Spring Boot 多数据配置更新

spring boot 版本为2.24 位最新稳定版本

POM文件

xml version="1.0" encoding="UTF-8"?>
<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>
    <parent>
        <groupId>org.springframework.bootgroupId>
        <artifactId>spring-boot-starter-parentartifactId>
        <version>2.2.4.RELEASEversion>
        <relativePath/> 
    parent>
    <groupId>com.dgwgroupId>
    <artifactId>moredatasoucreartifactId>
    <version>0.0.1-SNAPSHOTversion>
    <name>moredatasoucrename>
    <description>Demo project for Spring Bootdescription>

    <properties>
        <java.version>1.8java.version>
    properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.bootgroupId>
            <artifactId>spring-boot-starter-testartifactId>
            <scope>testscope>
        dependency>

        
        <dependency>
            <groupId>org.springframework.bootgroupId>
            <artifactId>spring-boot-starter-data-jpaartifactId>
        dependency>

        
        <dependency>
            <groupId>mysqlgroupId>
            <artifactId>mysql-connector-javaartifactId>
            <scope>runtimescope>
        dependency>

        <dependency>
            <groupId>org.springframework.bootgroupId>
            <artifactId>spring-boot-starter-webartifactId>
        dependency>
    dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.bootgroupId>
                <artifactId>spring-boot-maven-pluginartifactId>
            plugin>
        plugins>
    build>
project>

application.xml

spring.datasource.url 更新为spring.datasource.test.jdbc-url

##端口号
server.port=8888

# 2个数据库test和test1  spring.datasource 后面配置一个相应的数据源名称

##数据库url
spring.datasource.test.jdbc-url=jdbc:mysql://localhost/test2?userSSL=true&useUnicode=true&characterEncoding=UTF8&serverTimezone=GMT
##数据库用户名
spring.datasource.test.username=root
##数据库密码
spring.datasource.test.password=root
##数据库驱动
spring.datasource.test.driver-class-name=com.mysql.jdbc.Driver


##数据库url
spring.datasource.test2.jdbc-url=jdbc:mysql://localhost/test2?userSSL=true&useUnicode=true&characterEncoding=UTF8&serverTimezone=GMT
##数据库用户名
spring.datasource.test2.username=root
##数据库密码
spring.datasource.test2.password=root
##数据库驱动
spring.datasource.test2.driver-class-name=com.mysql.jdbc.Driver

spring.jpa.hibernate.ddl-auto=update
##控制台打印sql
spring.jpa.show-sql=true
spring.jpa.database=mysql
spring.jpa.generate-ddl=true

注入配置文件更新

原文件

@Configuration
@EnableTransactionManagement
@EnableJpaRepositories(
        entityManagerFactoryRef="entityManagerFactorySecondary",
        transactionManagerRef="transactionManagerSecondary",
        basePackages= { "com.dalaoyang.repository.datasource2" }) //设置Repository所在位置
public class Test2DataSourceConfig {
    @Autowired
    @Qualifier("test2DataSource")
    private DataSource dataSource;

    @Bean(name = "entityManagerSecondary")
    public EntityManager entityManager(EntityManagerFactoryBuilder builder) {
        return entityManagerFactorySecondary(builder).getObject().createEntityManager();
    }

    @Bean(name = "entityManagerFactorySecondary")
    public LocalContainerEntityManagerFactoryBean entityManagerFactorySecondary (EntityManagerFactoryBuilder builder) {
        return builder
                .dataSource(dataSource)
                .properties(getVendorProperties(dataSource))
                .packages("com.dalaoyang.entity.datasource2") //设置实体类所在位置
                .persistenceUnit("secondaryPersistenceUnit")
                .build();
    }

    @Autowired
    private JpaProperties jpaProperties;

    private Map getVendorProperties(DataSource dataSource) {
        return jpaProperties.getHibernateProperties(dataSource);
    }

    @Bean(name = "transactionManagerSecondary")
    PlatformTransactionManager transactionManagerSecondary(EntityManagerFactoryBuilder builder) {
        return new JpaTransactionManager(entityManagerFactorySecondary(builder).getObject());
    }
}

ge更新后文件

package com.dgw.config;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.boot.autoconfigure.orm.jpa.JpaProperties;
import org.springframework.boot.orm.jpa.EntityManagerFactoryBuilder;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Primary;
import org.springframework.data.jpa.repository.config.EnableJpaRepositories;
import org.springframework.orm.jpa.JpaTransactionManager;
import org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean;
import org.springframework.transaction.PlatformTransactionManager;
import org.springframework.transaction.annotation.EnableTransactionManagement;

import javax.persistence.EntityManager;
import javax.sql.DataSource;
import java.util.Map;

@Configuration
@EnableTransactionManagement
@EnableJpaRepositories(
        entityManagerFactoryRef="entityManagerFactoryPrimary",
        transactionManagerRef="transactionManagerPrimary",
        basePackages= {"com.dgw.repository.datasource"})
public class TestDataSourceConfig {
    @Autowired
    @Qualifier("testDataSource")
    private DataSource dataSource;

    @Autowired
    private JpaProperties jpaProperties;

    @Primary
    @Bean(name = "entityManagerPrimary")
    public EntityManager entityManager(EntityManagerFactoryBuilder builder) {
        return entityManagerFactoryPrimary(builder).getObject().createEntityManager();
    }

    @Primary
    @Bean(name = "entityManagerFactoryPrimary")
    public LocalContainerEntityManagerFactoryBean entityManagerFactoryPrimary (EntityManagerFactoryBuilder builder) {
        return builder
                .dataSource(dataSource)
                .properties(jpaProperties.getProperties())
                .packages("com.dgw.domain") //设置实体类所在位置
                .persistenceUnit("primaryPersistenceUnit")
                .build();
    }

    @Primary
    @Bean(name = "transactionManagerPrimary")
    public PlatformTransactionManager transactionManagerPrimary(EntityManagerFactoryBuilder builder) {
        return new JpaTransactionManager(entityManagerFactoryPrimary(builder).getObject());
    }
}