springboot 配置多数据源

Posted 2021-03-22 求知若渴的蜗牛

第一步：编写application.yml配置文件

spring:
  datasource:
    system:
      jdbc-url: jdbc:oracle:thin:@localhost:1521/orcl
      driver-class-name: oracle.jdbc.OracleDriver
      username: system
      password: 1234
      initial-size: 5
      min-idle: 5
      max-active: 20
      min-evictable-idle-time-millis: 300000
      validation-query: SELECT 1 FROM DUAL
      test-while-idle: true
    kllogt:
      jdbc-url: jdbc:oracle:thin:@localhost:1521/orcl
      driver-class-name: oracle.jdbc.OracleDriver
      username: kllogt
      password: kllogt
      initial-size: 5
      min-idle: 5
      max-active: 20
      min-evictable-idle-time-millis: 300000
      validation-query: SELECT 1 FROM DUAL
      test-while-idle: true
logging:
  level:
    org.springframework.web: debug

第二部编写两个数据源的配置类

配置类SystemResource

package www.it.com.springbootresource.util;
import org.apache.ibatis.io.VFS;
import org.apache.ibatis.session.SqlSessionFactory;
import org.mybatis.spring.SqlSessionFactoryBean;
import org.mybatis.spring.SqlSessionTemplate;
import org.mybatis.spring.annotation.MapperScan;
import org.mybatis.spring.boot.autoconfigure.SpringBootVFS;
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.core.io.support.PathMatchingResourcePatternResolver;

import javax.sql.DataSource;

//表示这个类为一个配置类
@Configuration
// 配置mybatis的接口类放的地方
@MapperScan(basePackages = "www.it.com.springbootresource.system.dao", sqlSessionFactoryRef = "SystemSqlSessionFactory")
public class SystemResource {
    // 将这个对象放入Spring容器中
    @Bean(name = "SystemDataSource")
    // 表示这个数据源是默认数据源
    @Primary
    // 读取application.properties中的配置参数映射成为一个对象
    // prefix表示参数的前缀
    @ConfigurationProperties(prefix = "spring.datasource.system")
    public DataSource getDateSource1() {
        return DataSourceBuilder.create().build();
    }
    @Bean(name = "SystemSqlSessionFactory")
    // 表示这个数据源是默认数据源
    @Primary
    // @Qualifier表示查找Spring容器中名字为SystemDataSource的对象
    public SqlSessionFactory SystemSqlSessionFactory(@Qualifier("SystemDataSource") DataSource datasource)
            throws Exception {
        SqlSessionFactoryBean bean = new SqlSessionFactoryBean();
        bean.setDataSource(datasource);
        VFS.addImplClass(SpringBootVFS.class);//mybatis的facroty需要加载SpringBoot独特的虚拟文件系统，才能识别类路
        PathMatchingResourcePatternResolver resolver = new PathMatchingResourcePatternResolver();
        //bean.setConfigLocation(resolver.getResource("classpath:mybatis-config.xml"));
        //bean.setMapperLocations(
                // 设置mybatis的xml所在位置
                //new PathMatchingResourcePatternResolver().getResources("classpath:mybatis/mapper/m1/*.xml"));
        return bean.getObject();
    }
    @Bean("SystemSqlSessionTemplate")
    // 表示这个数据源是默认数据源
    @Primary
    public SqlSessionTemplate Systemsqlsessiontemplate(
            @Qualifier("SystemSqlSessionFactory") SqlSessionFactory sessionfactory) {
        return new SqlSessionTemplate(sessionfactory);
    }
}

KllogtResource配置类

package www.it.com.springbootresource.util;

import org.apache.ibatis.io.VFS;
import org.apache.ibatis.session.SqlSessionFactory;
import org.mybatis.spring.SqlSessionFactoryBean;
import org.mybatis.spring.SqlSessionTemplate;
import org.mybatis.spring.annotation.MapperScan;
import org.mybatis.spring.boot.autoconfigure.SpringBootVFS;
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 wangjie
 * @date 2019/11/3 16:36
 * @description
 * @company 石文软件有限公司
 */
//表示这个类为一个配置类
@Configuration
// 配置mybatis的接口类放的地方
@MapperScan(basePackages = "www.it.com.springbootresource.kllogt.dao", sqlSessionFactoryRef = "KllogtSqlSessionFactory")
public class KllogtResource {
    @Bean(name = "KllogtDataSource")
    @ConfigurationProperties(prefix = "spring.datasource.kllogt")
    public DataSource getDateSource2() {
        return DataSourceBuilder.create().build();
    }
    @Bean(name = "KllogtSqlSessionFactory")
    public SqlSessionFactory KllogtSqlSessionFactory(@Qualifier("KllogtDataSource") DataSource datasource)
            throws Exception {
        SqlSessionFactoryBean bean = new SqlSessionFactoryBean();
        bean.setDataSource(datasource);
        VFS.addImplClass(SpringBootVFS.class);//mybatis的facroty需要加载SpringBoot独特的虚拟文件系统，才能识别类路
        PathMatchingResourcePatternResolver resolver = new PathMatchingResourcePatternResolver();
        //bean.setConfigLocation(resolver.getResource("classpath:mybatis-config.xml"));
       // bean.setMapperLocations(
        //        new PathMatchingResourcePatternResolver().getResources("classpath:mybatis/mapper/m2/*.xml"));
        return bean.getObject();
    }
    @Bean("KllogtSqlSessionTemplate")
    public SqlSessionTemplate Kllogtsqlsessiontemplate(
            @Qualifier("KllogtSqlSessionFactory") SqlSessionFactory sessionfactory) {
        return new SqlSessionTemplate(sessionfactory);
    }

}

项目结构

自己的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>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.2.0.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>www.it.cpm</groupId>
    <artifactId>springboot-resource</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>springboot-resource</name>
    <description>Demo project for Spring Boot</description>

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

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </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>com.oracle</groupId>
            <artifactId>ojdbc6</artifactId>
            <version>11.2.0.3</version>
        </dependency>

        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
            <version>2.1.1</version>
        </dependency>

        <!-- https://mvnrepository.com/artifact/javax.persistence/persistence-api -->
        <dependency>
            <groupId>javax.persistence</groupId>
            <artifactId>persistence-api</artifactId>
            <version>1.0.2</version>
        </dependency>

        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>1.18.10</version>
            <scope>provided</scope>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>