Springboot如何同时装配两个相同类型数据库

网友投稿 359 2022-09-14


Springboot如何同时装配两个相同类型数据库

目录同时装配两个相同类型数据库配置连接两个或多个数据库

同时装配两个相同类型数据库

1.配置文件:

spring:

profiles:

active: dev

datasource:

primary:

jdbc-url: jdbc:sqlserver://localhost:1111;DatabaseName=DB1

driverClassName: com.microsoft.sqlserver.jdbc.SQLServerDriver

type: com.alibaba.druid.pool.DruidDataSource

username: root

password: root

secondary:

jdbc-url: jdbc:sqlserver://localhost:1111;DatabaseName=DB2

driverClassName: com.microsoft.sqlserver.jdbc.SQLServerDriver

type: com.alibaba.druid.pool.DruidDataSource

username: root

password: root

2.配置类:

①主配置类:DataSourceConfigPrimary

@Configuration

@MapperScan(basePackages = "com.message.dao.primary", sqlSessionFactoryRef = "primarySqlSessionFactory")

public class DataSourceConfigPrimary {

// 将这个对象放入Spring容器中

@Bean(name = "primaryDataSource")

// 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.primary")

public DataSource getDateSourcePrimary()

{

return DataSourceBuilder.create().build();

}

@Bean(name = "primarySqlSessionFactory")

// 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test1DataSource的对象

public SqlSessionFactory primarySqlSessionFactory(@Qualifier("primaryDataSource") DataSource datasource)

throws Exception

{

SqlSessionFactoryBean bean = new SqlSessionFactoryBean();

bean.setDataSource(datasource);

bean.setMapperLocations(

// 设置mybatis的xml所在位置

new PathMatchingResourcePatternResolver().getResources("classpath:mapper/primary/*.xml"));

return bean.getObject();

}

@Bean("primarySqlSessionTemplate")

// 表示这个数据源是默认数据源

@Primary

public SqlSessionTemplate primarySqlSessionTemplate(

@Qualifier("primarySqlSessionFactory") SqlSessionFactory sessionFactory)

{

return new SqlSessionTemplate(sessionFactory);

}

}

②次配置类:DataSourceConfigSecondary

@Configuration

@MapperScan(basePackages = "com.message.dao.secondary", sqlSessionFactoryRef = "secondarySqlSessionFactory")

public class DataSourceConfigSecondary {

@Bean(name = "secondaryDataSource")

@ConfigurationProperties(prefix = "spring.datasource.secondary")

public DataSource getDateSource2()

{

return DataSourceBuilder.create().build();

}

@Bean(name = "secondarySqlSessionFactory")

public SqlSessionFactory secondarySqlSessionFactory(@Qualifier("secondaryDataSource") DataSource datasource)

throws Exception

{

SqlSessionFactoryBean bean = new SqlSessionFactoryBean();

bean.setDataSource(datasource);

bean.setMapperLocations(

new PathMatchingResourcePatternResolver().getResources("classpath:mapper/secondary/*.xml"));

return bean.getObject();

}

@Bean("secondarySqlSessionTemplate")

public SqlSessionTemplate secondarySqlSessionTemplate(

@Qualifier("secondarySqlSessionFactory") SqlSessionFactory sessionFactory)

{

return new SqlSessionTemplate(sessionFactory);

}

}

3.扫描XML

4.启动类:

@SpringBootApplication(scanBasePackages = {"com.lalal.*"})

public class MessageApplication extends SpringBootServletInitializer {

public static void main(String[] args) {

SpringApplication.run(MessageApplication.class, args);

}

@Bean

public RestTemplate restTemplate(){

return new RestTemplate();

}

}

配置连接两个或多个数据库

背景:

项目中需要从两个不同的数据库查询数据,之前实现方法是:springboot配置连接一个数据源,另一个使用jdbc代码连接。

为了改进,现在使用SpringBoot配置连接两个数据源

实现效果:

一个SpringBoot项目,同时连接两个数据库:比如一个是pgsql数据库,一个是oracle数据库

(啥数据库都一样,连接两个同为oracle的数据库,或两个不同的数据库,只需要更改对应的driver-class-name和jdbc-url等即可)

注意:连接什么数据库,要引入对应数据库的包

实现步骤:

1、修改application.yml,添加一个数据库连接配置

(我这里是yml格式,后缀为properties格式是一样的

server:

port: 7101

spring:

jpa:

show-sql: true

datasource:

test1:

driver-class-name: org.postgresql.Driver

jdbc-url: jdbc:postgresql://127.0.0.1:5432/test #测试数据库

username: root

password: root

test2:

driver-class-name: oracle.jdbc.driver.OracleDriver

jdbc-url: jdbc:oracle:thin:@127.0.0.1:8888:orcl #测试数据库

username: root

password: root

特别注意:

(1)使用test1、test2区分两个数据库连接

(2)url改为:jdbc-url

2、使用代码进行数据源注入,和扫描dao层路径(以前是在yml文件里配置mybatis扫描dao的路径)

新建config包,包含数据库1和数据库2的配置文件

(1)第一个数据库作为主数据库,项目启动默认连接此数据库

DataSource1Config.java

package com.test.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.fahttp://ctory.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.Pathhttp://MatchingResourcePatternResolver;

import org.springframework.jdbc.datasource.DataSourceTransactionManager;

import javax.sql.DataSource;

@Configuration

@MapperScan(basePackages = "com.test.dao.test1", sqlSessionTemplateRef = "test1SqlSessionTemplate")

public class DataSource1Config {

@Bean(name = "test1DataSource")

@ConfigurationProperties(prefix = "spring.datasource.test1")

@Primary

public DataSource testDataSource() {

return DataSourceBuilder.create().build();

}

@Bean(name = "test1SqlSessionFactory")

@Primary

public SqlSessionFactory testSqlSessionFactory(@Qualifier("test1DataSource") DataSource dataSource) throws Exception {

SqlSessionFactoryBean bean = new SqlSessionFactoryBean();

bean.setDataSource(dataSource);

bean.setMapperLocations(new PathMatchingResourcePatternResolver().getResources("classpath:test1/*.xml"));

return bean.getObject();

}

@Bean(name = "test1TransactionManager")

@Primary

public DataSourceTransactionManager testTransactionManager(@Qualifier("test1DataSource") DataSource dataSource) {

return new DataSourceTransactionManager(dataSource);

}

@Bean(name = "test1SqlSessionTemplate")

@Primary

public SqlSessionTemplate testSqlSessionTemplate(@Qualifier("test1SqlSessionFactory") SqlSessionFactory sqlSessionFactory) throws Exception {

return new SqlSessionTemplate(sqlSessionFactory);

}

}

特别注意:

(1)主数据库都有 @Primary注解,从数据库都没有

(2)第二个数据库作为从数据库

DataSource2Config.java

package com.test.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 org.springframework.jdbc.datasource.DataSourceTransactionManager;

import javax.sql.DataSource;

@Configuration

@MapperScan(basePackages = "com.test.dao.test2", sqlSessionTemplateRef = "test2SqlSessionTemplate")

public class DataSource2Config {

@Bean(name = "test2DataSource")

@ConfigurationProperties(prefix = "spring.datasource.test2")

public DataSource testDataSource() {

return DataSourceBuilder.create().build();

}

@Bean(name = "test2SqlSessionFactory")

public SqlSessionFactory testSqlSessionFactory(@Qualifier("test2DataSource") DataSource dataSource) throws Exception {

SqlSessionFactoryBean bean = new SqlSessionFactoryBean();

bean.setDataSource(dataSource);

bean.setMapperLocations(new PathMatchingResourcePatternResolver().getResources("classpath:test2/*.xml"));

return bean.getObject();

}

@Bean(name = "test2TransactionManager")

public DataSourceTransactionManager testTransactionManager(@Qualifier("test2DataSource") DataSource dataSource) {

return new DataSourceTransactionManager(dataSource);

}

@Bean(name = "test2SqlSessionTemplate")

public SqlSessionTemplate testSqlSessionTemplate(@Qualifier("test2SqlSessionFactory") SqlSessionFactory sqlSessionFactory) throws Exception {

return new SqlSessionTemplate(sqlSessionFactory);

}

}

3、 在dao文件夹下,新建test1和test2两个包,分别放两个不同数据库的dao层文件

(1)TestDao1.java

@Component

public interface TestDao1 {

List selectDailyActivity();

}

(2)TestDao2.java

@Component

public interface TestDao2 {

List selectDailyActivity();

}

4、 在resource下新建test1和test2两个文件夹,分别放入对应dao层的xml文件

(我原来项目的dao的xml文件在resource目录下,你们在自己的项目对应目录下即可)

注意dao的java文件和dao的xml文件名字要一致

(1)TestDao1.xml

PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"

"http://mybatis.org/dtd/mybatis-3-mapper.dtd">

SELECT * FROM daily_activity_data_middle

(2)TestDao2.xml

PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"

"http://mybatis.org/dtd/mybatis-3-mapper.dtd">

SELECT * FROM movieshowtest

5、测试

在controller文件里,注入两个数据库的dao,分别查询数据

@RestController

public class TestController extends BaseController{

@Autowired

private PropertiesUtils propertiesUtils;

@Autowired

private TestDao1 testDao1;

@Autowired

private TestDao2 testDao2;

@RequestMapping(value = {"/test/test1"},method = RequestMethod.POST)

public Result DataStatistics (@RequestBody JSONObject body) throws Exception {

Result result = new Result<>(ICommon.SUCCESS, propertiesUtils.get(ICommon.SUCCESS));

JSONObject object = new JSONObject();

object.put("data",testDao1.selectDailyActivity());

result.setResult(object);

return result;

}

@RequestMapping(value = {"/test/test2"},method = RequestMethod.POST)

public Result DataStatisticsaa (@RequestBody JSONObject body) throws Exception {

Result result = new Result<>(ICommon.SUCCESS, propertiesUtils.get(ICommon.SUCCESS));

JSONObject object = new JSONObject();

object.put("data",testDao2.selectDailyActivity());

result.setResult(object);

return result;

}

}


版权声明:本文内容由网络用户投稿,版权归原作者所有,本站不拥有其著作权,亦不承担相应法律责任。如果您发现本站中有涉嫌抄袭或描述失实的内容,请联系我们jiasou666@gmail.com 处理,核实后本网站将在24小时内删除侵权内容。

上一篇:网管,真的是我该选择的路吗?(网管要干嘛)
下一篇:优化运维 实现资源最佳调度
相关文章

 发表评论

暂时没有评论,来抢沙发吧~