Python 官方文档:入门教程 => 点击学习
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
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();
}
}
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.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 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<DailyActivityDataMiddle> selectDailyActivity();
}
(2)TestDao2.java
@Component
public interface TestDao2 {
List<MovieShowTest> 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
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper
PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
"Http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.test.dao.test1.TestDao1">
<select id="selectDailyActivity" resultType="com.test.pojo.DailyActivityDataMiddle">
SELECT * FROM daily_activity_data_middle
</select>
</mapper>
(2)TestDao2.xml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper
PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.test.dao.test2.TestDao2">
<select id="selectDailyActivity" resultType="com.test.pojo.MovieShowTest">
SELECT * FROM movieshowtest
</select>
</mapper>
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<JSONObject> DataStatistics (@RequestBody jsONObject body) throws Exception {
Result<JSONObject> 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<JSONObject> DataStatisticsaa (@RequestBody JSONObject body) throws Exception {
Result<JSONObject> result = new Result<>(ICommon.SUCCESS, propertiesUtils.get(ICommon.SUCCESS));
JSONObject object = new JSONObject();
object.put("data",testDao2.selectDailyActivity());
result.setResult(object);
return result;
}
}
以上为个人经验,希望能给大家一个参考,也希望大家多多支持编程网。
--结束END--
本文标题: Springboot如何同时装配两个相同类型数据库
本文链接: https://lsjlt.com/news/157556.html(转载时请注明来源链接)
有问题或投稿请发送至: 邮箱/279061341@qq.com QQ/279061341
2024-03-01
2024-03-01
2024-03-01
2024-02-29
2024-02-29
2024-02-29
2024-02-29
2024-02-29
2024-02-29
2024-02-29
回答
回答
回答
回答
回答
回答
回答
回答
回答
回答
0