spring boot的Jdbc多数据源配置实战

一新建依赖

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

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

    <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
        <version>5.1.21</version>
    </dependency>

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

</dependencies>

二配置application.properties

#配置主数据源
spring.datasource.primary.url=jdbc:mysql://localhost:3306/test
spring.datasource.primary.username=root
spring.datasource.primary.password=123456
spring.datasource.primary.driver-class-name=com.mysql.jdbc.Driver
#配置次数据源
spring.datasource.secondary.url=jdbc:mysql://localhost:3306/test1
spring.datasource.secondary.username=root
spring.datasource.secondary.password=123456
spring.datasource.secondary.driver-class-name=com.mysql.jdbc.Driver

三数据源配置

package com.didispace;

import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.boot.autoconfigure.jdbc.DataSourceBuilder;
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 javax.sql.DataSource;


@Configuration
public class DataSourceConfig {
    /*
    创建一个Spring配置类，定义两个DataSource用来读取application.properties中的不同配置。
    主数据源配置为spring.datasource.primary开头的配置，第二数据源配置为spring.datasource.secondary开头的配置。
    */
    @Bean(name = "primaryDataSource")
    @Qualifier("primaryDataSource")
    @ConfigurationProperties(prefix="spring.datasource.primary")
    public DataSource primaryDataSource() {
        return DataSourceBuilder.create().build();
    }

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

     /*
    对JdbcTemplate的支持比较简单，只需要为其注入对应的datasource即可.
    在创建JdbcTemplate的时候分别注入名为primaryDataSource和secondaryDataSource的数据源来区分不同的JdbcTemplate。
    */
    @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);
    }

}

四主类

package com.didispace;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.autoconfigure.jdbc.DataSourceBuilder;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Primary;
import org.springframework.jdbc.core.JdbcTemplate;

import javax.sql.DataSource;

@SpringBootApplication
public class Application {

    public static void main(String[] args) {
        SpringApplication.run(Application.class, args);
    }

}

五测试类

package com.didispace;

import org.junit.Assert;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.boot.test.SpringApplicationConfiguration;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;


@RunWith(SpringJUnit4ClassRunner.class)
@SpringApplicationConfiguration(Application.class)
public class ApplicationTests {

    @Autowired
    @Qualifier("primaryJdbcTemplate")
    protected JdbcTemplate jdbcTemplate1;

    @Autowired
    @Qualifier("secondaryJdbcTemplate")
    protected JdbcTemplate jdbcTemplate2;

    @Before
    public void setUp() {
        jdbcTemplate1.update("DELETE  FROM  USER ");
        jdbcTemplate2.update("DELETE  FROM  USER ");
    }

    @Test
    public void test() throws Exception {

        // 往第一个数据源中插入两条数据
        jdbcTemplate1.update("insert into user(id,name,age) values(?, ?, ?)", 1, "aaa", 20);
        jdbcTemplate1.update("insert into user(id,name,age) values(?, ?, ?)", 2, "bbb", 30);

        // 往第二个数据源中插入一条数据，若插入的是第一个数据源，则会主键冲突报错
        jdbcTemplate2.update("insert into user(id,name,age) values(?, ?, ?)", 1, "aaa", 20);

        // 查一下第一个数据源中是否有两条数据，验证插入是否成功
        Assert.assertEquals("2", jdbcTemplate1.queryForObject("select count(1) from user", String.class));

        // 查一下第一个数据源中是否有两条数据，验证插入是否成功
        Assert.assertEquals("1", jdbcTemplate2.queryForObject("select count(1) from user", String.class));

    }
}

六测试结果

spring boot的Jdbc多数据源配置实战

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