Использование нескольких источников данных в Spring

Настройка нескольких источников данных в Spring

本文简单的介绍spring中使用多个数据库的问题和配置过程

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Проект зависит от jar

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1. конфигурация jdbc

Пример: Здесь в качестве примера мы возьмем две базы данных.Также используется MySQL.Другие конфигурации баз данных аналогичны.

jdbc.driverClassName=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://192.168.10.222:3306/test
jdbc.username=root
jdbc.password=root

jdbc1.driverClassName=com.mysql.jdbc.Driver
jdbc1.url=jdbc:mysql://192.168.10.222:3306/world
jdbc1.username=root
jdbc1.password=root

2. Шаги настройки, связанные с Spring

1. Представьте конфигурацию пружины

<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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
	<modelVersion>4.0.0</modelVersion>
	<parent>
		<groupId>com.julong</groupId>
		<artifactId>spring-learn-examples</artifactId>
		<version>0.0.1-SNAPSHOT</version>
	</parent>
	<artifactId>spring-learn-example-db</artifactId>
	<properties>
		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
		<maven.compiler.source>1.7</maven.compiler.source>
		<maven.compiler.target>1.7</maven.compiler.target>
		<spring.security.version>3.2.3.RELEASE</spring.security.version>
	</properties>
	<dependencies>
		<!-- Spring dependencies -->
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-context</artifactId>
			<version>3.2.8.RELEASE</version>
			<scope>runtime</scope>
			<exclusions>
				<exclusion>
					<groupId>commons-logging</groupId>
					<artifactId>commons-logging</artifactId>
				</exclusion>
			</exclusions>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-core</artifactId>
			<version>3.2.8.RELEASE</version>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-web</artifactId>
			<version>3.2.8.RELEASE</version>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-aop</artifactId>
			<version>3.2.8.RELEASE</version>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-jdbc</artifactId>
			<version>3.2.8.RELEASE</version>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-orm</artifactId>
			<version>3.2.8.RELEASE</version>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-test</artifactId>
			<version>3.2.8.RELEASE</version>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-tx</artifactId>
			<version>3.2.8.RELEASE</version>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-webmvc-portlet</artifactId>
			<version>3.2.8.RELEASE</version>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-aspects</artifactId>
			<version>3.2.8.RELEASE</version>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-context-support</artifactId>
			<version>3.2.8.RELEASE</version>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-webmvc</artifactId>
			<version>3.2.8.RELEASE</version>
		</dependency>
		<dependency>
			<groupId>mysql</groupId>
			<artifactId>mysql-connector-java</artifactId>
			<version>5.1.49</version>
		</dependency>
		<dependency>
			<groupId>commons-dbcp</groupId>
			<artifactId>commons-dbcp</artifactId>
			<version>1.4</version>
		</dependency>
		<!-- log4j -->
		<dependency>
			<groupId>org.slf4j</groupId>
			<artifactId>jcl-over-slf4j</artifactId>
			<version>1.5.8</version>
			<scope>runtime</scope>
		</dependency>
		<dependency>
			<groupId>org.slf4j</groupId>
			<artifactId>slf4j-api</artifactId>
			<version>1.5.8</version>
			<scope>runtime</scope>
		</dependency>
		<dependency>
			<groupId>org.slf4j</groupId>
			<artifactId>slf4j-log4j12</artifactId>
			<version>1.5.8</version>
			<scope>runtime</scope>
		</dependency>
		<dependency>
			<groupId>log4j</groupId>
			<artifactId>log4j</artifactId>
			<version>1.2.14</version>
			<scope>runtime</scope>
		</dependency>
		<!-- Spring Security -->
		<dependency>
			<groupId>org.springframework.security</groupId>
			<artifactId>spring-security-web</artifactId>
			<version>3.2.3.RELEASE</version>
		</dependency>
		<dependency>
			<groupId>org.springframework.security</groupId>
			<artifactId>spring-security-config</artifactId>
			<version>3.2.3.RELEASE</version>
		</dependency>
		<!-- https://mvnrepository.com/artifact/javax.servlet/javax.servlet-api -->
		<dependency>
			<groupId>javax.servlet</groupId>
			<artifactId>javax.servlet-api</artifactId>
			<version>3.0.1</version>
			<scope>provided</scope>
		</dependency>
		<!-- https://mvnrepository.com/artifact/javax.servlet/servlet-api -->
		<dependency>
			<groupId>javax.servlet</groupId>
			<artifactId>servlet-api</artifactId>
			<version>3.0-alpha-1</version>
			<scope>provided</scope>
		</dependency>
		<!-- https://mvnrepository.com/artifact/javax.servlet/jsp-api -->
		<dependency>
			<groupId>javax.servlet</groupId>
			<artifactId>jsp-api</artifactId>
			<version>2.0</version>
			<scope>provided</scope>
		</dependency>
		<dependency>
			<groupId>jstl</groupId>
			<artifactId>jstl</artifactId>
			<version>1.2</version>
		</dependency>
		<dependency>
			<groupId>junit</groupId>
			<artifactId>junit</artifactId>
			<version>4.11</version>
			<scope>test</scope>
		</dependency>
	</dependencies>
	<build>
		<plugins>
			<plugin>
				<artifactId>maven-compiler-plugin</artifactId>
				<configuration>
					<source>1.7</source>
					<target>1.7</target>
				</configuration>
			</plugin>
		</plugins>
	</build>
</project>

 

2. пружинная конфигурация

Код следующий (пример):

весна-приложение-databases.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
	xmlns:context="http://www.springframework.org/schema/context"
	xmlns:aop="http://www.springframework.org/schema/aop"
    xmlns:tx="http://www.springframework.org/schema/tx"
	xsi:schemaLocation="http://www.springframework.org/schema/beans
        http://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/context
        http://www.springframework.org/schema/context/spring-context.xsd
        http://www.springframework.org/schema/tx
     	http://www.springframework.org/schema/tx/spring-tx.xsd
     	http://www.springframework.org/schema/aop
    	http://www.springframework.org/schema/aop/spring-aop.xsd">
	
	<!-- 引入文件的第一种配置  -->
    <context:property-placeholder location="jdbc.properties"/>
	<!-- 引入文件的第二种配置 
	<bean class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
	  <property name="locations" value="classpath:jdbc.properties"/>
	</bean>
	 -->

	<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"	destroy-method="close">
		<property name="driverClassName" value="${jdbc.driverClassName}" />
		<property name="url" value="${jdbc.url}" />
		<property name="username" value="${jdbc.username}" />
		<property name="password" value="${jdbc.password}" />
	</bean>


	<bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate">
		<property name="dataSource" ref="dataSource"></property>
	</bean>

	<!--  配置事务 -->
	<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
		<property name="dataSource" ref="dataSource"/>
	</bean>
	
	<tx:advice id="txAdvice" transaction-manager="transactionManager">
		<tx:attributes>
		  <tx:method name="get*" read-only="true"/>
		  <tx:method name="*"/>
		</tx:attributes>
	</tx:advice>
	
	<aop:config>
	  <aop:pointcut id="serviceMethods" expression="execution(* com.julong..*Service.*(..))"/>
	  <aop:advisor advice-ref="txAdvice" pointcut-ref="serviceMethods"/>
	</aop:config>
	
	<bean id="dataSource1" class="org.apache.commons.dbcp.BasicDataSource"	destroy-method="close">
		<property name="driverClassName" value="${jdbc1.driverClassName}" />
		<property name="url" value="${jdbc1.url}" />
		<property name="username" value="${jdbc1.username}" />
		<property name="password" value="${jdbc1.password}" />
	</bean>
	
	<bean id="jdbcTemplate1" class="org.springframework.jdbc.core.JdbcTemplate">
		<property name="dataSource" ref="dataSource1"></property>
	</bean>
	
	<!--  配置事务 -->
	<bean id="transactionManager1" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
		<property name="dataSource" ref="dataSource1"/>
	</bean>
	
	<tx:advice id="txAdvice1" transaction-manager="transactionManager1">
		<tx:attributes>
		  <tx:method name="get*" read-only="true"/>
		  <tx:method name="*"/>
		</tx:attributes>
	</tx:advice>
	
	<aop:config>
	  <aop:pointcut id="serviceMethods1" expression="execution(* com.julong..*Service.*(..))"/>
	  <aop:advisor advice-ref="txAdvice1" pointcut-ref="serviceMethods1"/>
	</aop:config>
	
</beans>

Общий файл конфигурации

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context"
	xsi:schemaLocation="http://www.springframework.org/schema/beans
        http://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/context
        http://www.springframework.org/schema/context/spring-context.xsd">

		<import resource="spring-application-databases.xml"/>
</beans>

 Java-код вызова

package com.julong;

import org.apache.commons.dbcp.BasicDataSource;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.jdbc.datasource.DataSourceTransactionManager;

/**
 * 执行启动spring 主程序
 * @author julong
 * @date 2022年6月2日 下午7:54:32
 * @desc spring 中多数据源方式
 */
public class SpringApplicationMain {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		ApplicationContext context = new ClassPathXmlApplicationContext("spring-application.xml");
		
		System.out.println("启动服务");
		
		//获取数据源
		BasicDataSource	dataSource = (BasicDataSource) context.getBean("dataSource");
		System.out.println(dataSource.getUrl());
	
		
		BasicDataSource	dataSource1 = (BasicDataSource) context.getBean("dataSource1");
		System.out.println(dataSource1.getUrl());
		try {
			JdbcTemplate jdbcTemplate = (JdbcTemplate) context.getBean("jdbcTemplate");
			System.out.println(jdbcTemplate.isLazyInit());
			
			JdbcTemplate jdbcTemplate1 = (JdbcTemplate) context.getBean("jdbcTemplate1");
			System.out.println(jdbcTemplate1.isLazyInit());
			
			DataSourceTransactionManager transactionManager = (DataSourceTransactionManager) context.getBean("transactionManager");
			System.out.println(transactionManager.isValidateExistingTransaction());
			
			DataSourceTransactionManager transactionManager1 = (DataSourceTransactionManager) context.getBean("transactionManager1");
			System.out.println(transactionManager.isValidateExistingTransaction());
		
			
			
			
			
			
			System.in.read();
		} catch (Exception e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}

}

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Подведем итог

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