目录
- 1、首先要引入以下依赖
- 2、demo的项目结构如下
- 3、yml配置文件
- 4、配置类
- 5、controller、dao、service以及对应的.XML文件可以根据自身业务情况进行开发，再次不做过多赘述。
- 总结
分享一下近期处理的一个小demo，关于配置多数据源实编程客栈现不同服务之间的数据推送和数据治理。第一次接触到pg库和sqlserver一头雾水，选择了JDBC+myBATis-plus的方式去链接。
1、首先要引入以下依赖
<dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>org.projectlombok</groupId> <artifactId>lombok</artifactId> <version>1.18.12</version> <optional>true</optional> </dependency> <dependency> <groupId>org.apache.httpcomponents</groupId> <artifactId>httpclient</artifactId> <version>4.5.10</version> </dependency> <dependency> <groupId>com.alibaba</groupId> <artifactId>fastjson</artifactId> <version>1.2.62</version> </dependency> <!--mysql 驱动--> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-Java</artifactId> <version>8.0.22</version> </dependency> <!--PostgreSQL 驱动--> <dependency> <groupId>org.postgresql</groupId> <artifactId>postgresql</artifactId> <scope>runtime</scope> </dependency> <!--sqlserver 配置--> <dependency> <groupId>com.microsoft.sqlserver</groupId> <artifactId>mssql-jdbc</artifactId> <version>9.4.0.jre8</version> </dependency> <!--//spring默认的jdbc连接--> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-jdbc</artifactId> </dependency> <dependency> <groupId>com.alibaba</groupId> <artifactId>druid</artifactId> <version>1.1.13</version> </dependency> <dependency> <groupId>com.baomidou</groupId> <artifactId>mybatis-plus-boot-starter</artifactId> <version>3.4.0</version> </dependency> <dependency> <groupId>cn.afterturn</groupId> <artifactId>easypoi-base</artifactId> <version>4.4.0</version> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> <version>2.7.12</version> <configuration> <!-- 指定该Main Class为全局的唯一入口 --> <mainClasspython>com.zkgl.ZsjDemoApplication</mainClass> </configuration> <executions> <execution> <goals> <!--可以把依赖的包都打包到生成的Jar包中 --> <goal>repackage</goal> </goals> </execution> </executions> </plugin> </plugins> </build>
2、demo的项目结构如下
3、yml配置文件
server:
port:3666
spring:
application:
name: multiple-data
datasource:
show-sql: false
db1:
jdbc-url: jdbc:mysql://ip地址:端口/数据库名?serverTimezone=Asia/Shanghai&useUnicode=true&characterEncoding=utf-8&zeroDateTimeBehavior=convertToNull&useSSL=false&allowpublicKeyRetrieval=true
username: 数据库账号
password: 数据库密码
driver-class-name: com.mysql.cj.jdbc.Driver
DB2:
jdbc-url: jdbc:postgresql://ip地址:端口/数据库名?serverTimezone=Asia/Shanghai&useUnicode=true&characterEncoding=UTF-8&zeroDateTimeBehavior=convertToNull&useSSL=false&allowPublicKeyRetrieval=true
username: 数据库账号
password: 数据库密码
driver-class-name: org.postgresql.Driver
db3:
jdbc-url: jdbc:sqlserver://ip地址:端口;databaseName=数据库名
username: 数据库账号
password: 数据库密码
driver-class-name: com.microsoft.sqlserver.jdbc.SQLServerDriver
4、配置类
package com.zkgl.config;
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: 袁振豪
* @Description:
* @Date: Created in 2023-07-23 11:04 PM
* @Modified By:
*/
@Configuration
@MapperScan(basePackages = "com.zkgl.dao.db1",sqlSessionFactoryRef = "db1SqlSessionFactory")
public class MysqlDataSourceConfig {
static final String MAPPER_LOCATION = "classpath:/mapper/db1/*.xml";
@Bean("db1DataSource")
@ConfigurationProperties(prefix = "spring.datasource.db1")
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);
bean.setMapperlocations(new PathMatchingResourcePatternResolver().getResources(MAPPER_LOCATION));
return bean.getObject();
}
@Bean("db1SqlSessionTemplate")
public SqlSessionTemplate db1SqlSessionTemplate(@Qualifier("db1SqlSessionFactory") SqlSessionFactory sqlSessionFactory){
return new SqlSessionTemplate(sqlSessionFactory);
}
}
package com.zkgl.config;
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: 袁振豪
* @Description:
* @Date: Created in 2023-07-23 11:04 PM
* @Modified By:
*/
@Configuration
@MapperScan(basePackages = "com.zkgl.dao.db2",sqlSessionFactoryRef = "db2SqlSessionFactory")
public class PgDataSourceConfig {
static final String MAPPER_LOCATION = "classpath:/mapper/db2/*.xml";
@Bean("db2DataSource")
@ConfigurationProperties(prefix = "spring.datasource.db2")
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);
bean.setMapperLocations(new PathMatchingResourcePatternResolver().getResources(MAPPER_LOCATION));
return bean.getObject();
}
@Bean("db2SqlSessionTemplate")
public SqlSessionTemplate db2SqlSessionTemplate(@Qualifier("db2SqlSessionFactory") SqlSessionFactory sqlSessionFactory){
return new SqlSessionTemplate(sqlSessionFactory);
}
}
package com.zkgl.config;
import org.apache.ibatis.session.SqlSessionFactory;
import org.mybatis.spring.SqlSessionFactoryBean;
import org.mybatis.spring.SqlSessionTemplate;
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.core.io.support.PathMatchingResourcePatternResolver;
import javax.sql.DataSource;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.context.annotation.Configuration;www.devze.com
/**
* @Author: 袁振豪
* @Description:
* @Date: Created in 2023-07-23 11:04 PM
* @Modified By:
*/
@Configuration
@MapperScan(basePackages = "com.zkgl.dao.db3",sqlSessionFactoryRef = "db3SqlSessionFactory")
public class SqlServerDataSourceConfig {
static final String MAPPER_LOCATION = "classpath:/mapper/db3/*.xml";
@Bean("db3DataSource")
@ConfigurationProperties(prefix = "spring.datasource.db3")
public DataSource getDb1DataSowww.devze.comurce(){
return DataSourceBuilder.create().build();
}
@Bean("db3SqlSessionFactory")
public SqlSessionFactory db1SqlSessionFactory(@Qualifier("db3DataSource") DataSource dataSource) throws Exception {
SqlSessionFactoryBean bean = new SqlSessionFactoryBean();
bean.setDataSource(dataSource);
bean.setMapperLocations(new PathMatchingResourcePatternResolver().getResources(MAPPER_LOCATION));
return bean.getObject();
}
@Bean("db3SqlSessionTemplate")
public SqlSessionTemplate db1SqlSessionTemplate(@Qualifier("db3SqlSessionFactory") SqlSessionFactory sqlSessionFactory){
return new SqlSessionTemplate(sqlSessionFactory);
}
}
5、controller、dao、service以及对应的.xml文件可以根据自身业务情况进行开发，再次不做过多赘述。
总结：要进行多数据源的配置，以此案例为例，最重要的是对各个库的适配，也就是各自的驱动。众所周知，要使用JDBC连接数据库，主要有以下编程步骤：
- 注册驱动
- 建立数据库连接
- 创建数据库操作对象
- 执行SQL语句
- 处理查询结果集
- 关闭资源
而在本案例中，pom中引入了相关依赖，在yml配置了驱动，之后在config中以Bean的形式分别命名和初始化相关配置，这样在Springboot项目中，通过@SpringBootApplication注解中的@EnableAutoConfigtion注解就可以扫描到这些配置好的Bean，从而正常使用了。
总结
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