一、建庫建表
1.1 創(chuàng)建數(shù)據(jù)庫db1和數(shù)據(jù)庫db2
1.2 在數(shù)據(jù)庫db1中創(chuàng)建表db1
CREATE TABLE `db1` (
`id` int unsigned zerofill NOT NULL AUTO_INCREMENT,
`name` varchar(50) DEFAULT NULL,
`age` int unsigned zerofill DEFAULT NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=1 DEFAULT CHARSET=utf8mb4;
1.3 在數(shù)據(jù)庫db2中創(chuàng)建表db2
CREATE TABLE `db2` (
`id` int unsigned zerofill NOT NULL AUTO_INCREMENT,
`name` varchar(50) DEFAULT NULL,
`age` int unsigned zerofill DEFAULT NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=1 DEFAULT CHARSET=utf8mb4;
二、創(chuàng)建springboot項目
2.1 pom.xml導(dǎo)入依賴
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId>
<version>2.1.4</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
<exclusions>
<exclusion>
<groupId>org.junit.vintage</groupId>
<artifactId>junit-vintage-engine</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<scope>test</scope>
</dependency>
2.2 創(chuàng)建application.yml文件(與 2.3 二選一進行配置,推薦此方法)
server:
port: 8080 # 啟動端口
spring:
datasource:
db1: # 數(shù)據(jù)源1
jdbc-url: jdbc:mysql://localhost:3306/db1?serverTimezone=Asia/Shanghai&useUnicode=true&characterEncoding=utf8
username: root
password: root
driver-class-name: com.mysql.cj.jdbc.Driver
db2: # 數(shù)據(jù)源2
jdbc-url: jdbc:mysql://localhost:3306/db2?serverTimezone=Asia/Shanghai&useUnicode=true&characterEncoding=utf8
username: root
password: root
driver-class-name: com.mysql.cj.jdbc.Driver
2.3 創(chuàng)建application.properties文件(與 2.2 二選一進行配置)
server.port=8080 spring.datasource.db1.url=jdbc:mysql://localhost:3306/db1?serverTimezone=Asia/Shanghai&useUnicode=true&characterEncoding=utf8 spring.datasource.db1.username=root spring.datasource.db1.password=root spring.datasource.db1.driver-class-name=com.mysql.jdbc.Driver spring.datasource.db2.url=jdbc:mysql://localhost:3306/db2?serverTimezone=Asia/Shanghai&useUnicode=true&characterEncoding=utf8 spring.datasource.db2.username=root spring.datasource.db2.password=root spring.datasource.db2.driver-class-name=com.mysql.jdbc.Driver
2.4 創(chuàng)建mapper文件
我個人是放在mapper包下,文件隨便命名的
代碼隨便寫的,測試而已
import org.apache.ibatis.annotations.Insert;
import org.apache.ibatis.annotations.Mapper;
/**
* @Author if
* @Description: What is it
* @Date 2021-05-20 下午 09:52
*/
@Mapper
public interface Db1Mapper {
@Insert("insert into db1(name,age) values('if',18)")
int add();
}
import org.apache.ibatis.annotations.Insert;
import org.apache.ibatis.annotations.Mapper;
/**
* @Author if
* @Description: What is it
* @Date 2021-05-20 下午 09:52
*/
@Mapper
public interface Db2Mapper {
@Insert("insert into db2(name,age) values('fi',81)")
int add();
}
2.5 創(chuàng)建config配置文件
我個人是放在config包下,文件隨便命名的
import org.apache.ibatis.session.SqlSessionFactory;
import org.mybatis.spring.SqlSessionFactoryBean;
import org.mybatis.spring.SqlSessionTemplate;
import org.mybatis.spring.annotation.MapperScan;
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.core.io.support.PathMatchingResourcePatternResolver;
import javax.sql.DataSource;
/**
* @Author if
* @Description: 注意以下有些文件路徑需要更改
* @Date 2021-05-20 下午 09:56
*/
@Configuration
@MapperScan(basePackages = "com.ifyyf.study.mapper.db1", sqlSessionFactoryRef = "db1SqlSessionFactory")
public class Db1DataSourceConfig {
@Bean("db1DataSource")
@ConfigurationProperties(prefix = "spring.datasource.db1") //讀取application.yml中的配置參數(shù)映射成為一個對象
public DataSource getDb1DataSource(){
return DataSourceBuilder.create().build();
}
@Bean("db1SqlSessionFactory")
public SqlSessionFactory db1SqlSessionFactory(@Qualifier("db1DataSource") DataSource dataSource) throws Exception {
SqlSessionFactoryBean bean = new SqlSessionFactoryBean();
bean.setDataSource(dataSource);
// mapper的xml形式文件位置必須要配置,不然將報錯:no statement (這種錯誤也可能是mapper的xml中,namespace與項目的路徑不一致導(dǎo)致)
bean.setMapperLocations(new PathMatchingResourcePatternResolver().getResources("classpath*:mapping/db1/*.xml"));
return bean.getObject();
}
@Bean("db1SqlSessionTemplate")
public SqlSessionTemplate db1SqlSessionTemplate(@Qualifier("db1SqlSessionFactory") SqlSessionFactory sqlSessionFactory){
return new SqlSessionTemplate(sqlSessionFactory);
}
}
import org.apache.ibatis.session.SqlSessionFactory;
import org.mybatis.spring.SqlSessionFactoryBean;
import org.mybatis.spring.SqlSessionTemplate;
import org.mybatis.spring.annotation.MapperScan;
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.core.io.support.PathMatchingResourcePatternResolver;
import javax.sql.DataSource;
/**
* @Author if
* @Description: 注意以下有些文件路徑需要更改
* @Date 2021-05-20 下午 09:56
*/
@Configuration
@MapperScan(basePackages = "com.ifyyf.study.mapper.db2", sqlSessionFactoryRef = "db2SqlSessionFactory")
public class Db2DataSourceConfig {
@Bean("db2DataSource")
@ConfigurationProperties(prefix = "spring.datasource.db2") //讀取application.yml中的配置參數(shù)映射成為一個對象
public DataSource getDb2DataSource(){
return DataSourceBuilder.create().build();
}
@Bean("db2SqlSessionFactory")
public SqlSessionFactory db2SqlSessionFactory(@Qualifier("db2DataSource") DataSource dataSource) throws Exception {
SqlSessionFactoryBean bean = new SqlSessionFactoryBean();
bean.setDataSource(dataSource);
// mapper的xml形式文件位置必須要配置,不然將報錯:no statement (這種錯誤也可能是mapper的xml中,namespace與項目的路徑不一致導(dǎo)致)
bean.setMapperLocations(new PathMatchingResourcePatternResolver().getResources("classpath*:mapping/db2/*.xml"));
return bean.getObject();
}
@Bean("db2SqlSessionTemplate")
public SqlSessionTemplate db2SqlSessionTemplate(@Qualifier("db2SqlSessionFactory") SqlSessionFactory sqlSessionFactory){
return new SqlSessionTemplate(sqlSessionFactory);
}
}
三、測試代碼運行
3.1 測試類中測試代碼
springboot項目中測試類進行測試
import com.ifyyf.study.mapper.db1.Db1Mapper;
import com.ifyyf.study.mapper.db2.Db2Mapper;
import org.junit.jupiter.api.Test;
import org.springframework.boot.test.context.SpringBootTest;
import javax.annotation.Resource;
@SpringBootTest
class StudyApplicationTests {
@Resource
private Db1Mapper db1Mapper;
@Resource
private Db2Mapper db2Mapper;
@Test
void contextLoads() {
System.out.println(db1Mapper.add());
System.out.println(db2Mapper.add());
}
}
3.2 運行結(jié)果
到此這篇關(guān)于 SpringBoot 框架中配置多數(shù)據(jù)源詳細(xì)方法的文章就介紹到這了,想要了解更多相關(guān) SpringBoot 其他內(nèi)容請搜索W3Cschool以前的文章或繼續(xù)瀏覽下面的相關(guān)文章,也希望大家以后多多支持!