我的产品支持两个以上的数据库。 我在我的产品中使用 common.properties 文件
数据库配置说明
Product.database=XXXX (oracle,postgres or mysql)
如何动态加载 XXXX (数据库)jdbc.properties文件?
有可能。帮助我
答案 0 :(得分:0)
也许您可以使用Properties类,它提供load
方法。
如果您使用Spring Framework,也许您想查看PropertyPlaceholderConfigurer
答案 1 :(得分:0)
主要针对我的应用程序,基于Spring + JPA + Hibernate。我正在使用文件属性 让Spring读取属性,你也可以在spring xml配置中定义多个数据源。
<强> datasource.properties 强> #Hibernate属性 hibernate.hbm2ddl.auto =创建降 hibernate.dialect = org.hibernate.dialect.PostgreSQLDialect hibernate.show_sql =真 dataSource.driverClassName = org.postgresql.Driver dataSource.url = JDBC:在PostgreSQL://本地主机:5432 / myproject的 dataSource.username = postgres的 dataSource.password = 123456
<强>的applicationContext.xml 强>
<?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:aop="http://www.springframework.org/schema/aop"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:jee="http://www.springframework.org/schema/jee"
xmlns:lang="http://www.springframework.org/schema/lang"
xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:util="http://www.springframework.org/schema/util"
xmlns:p="http://www.springframework.org/schema/p"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd
http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee-3.0.xsd
http://www.springframework.org/schema/lang http://www.springframework.org/schema/lang/spring-lang-3.0.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd
http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-3.0.xsd
http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd"
default-autowire="byName">
<!-- import another XML configuration -->
<import resource="datasourceContext.xml"/>
<context:annotation-config/>
<context:component-scan base-package="com.mycompany"/>
<tx:annotation-driven />
<强> datasourceContext.xml 强>
<?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:aop="http://www.springframework.org/schema/aop"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:jee="http://www.springframework.org/schema/jee" xmlns:lang="http://www.springframework.org/schema/lang"
xmlns:tx="http://www.springframework.org/schema/tx" xmlns:util="http://www.springframework.org/schema/util"
xmlns:p="http://www.springframework.org/schema/p"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd
http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee-3.0.xsd
http://www.springframework.org/schema/lang http://www.springframework.org/schema/lang/spring-lang-3.0.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd
http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-3.0.xsd
http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd"
default-autowire="byName">
<context:property-placeholder location="classpath:datasource.properties"/>
<bean id="dataSource"
class="org.springframework.jdbc.datasource.DriverManagerDataSource"
p:driverClassName="${dataSource.driverClassName}" p:url="${dataSource.url}"
p:username="${dataSource.username}" p:password="${dataSource.password}" />
<bean
class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean"
id="entityManagerFactory" p:dataSource-ref="dataSource">
<property name="persistenceUnitName" value="myPU" />
<property name="jpaVendorAdapter">
<bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter"
p:database="POSTGRESQL"
p:showSql="true"
p:generateDdl="true" />
</property>
</bean>
<bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager">
<property name="entityManagerFactory" ref="entityManagerFactory"/>
<property name="dataSource" ref="dataSource"/>
</bean>
这是 persistence.xml
<?xml version="1.0" encoding="UTF-8"?>
<persistence version="1.0" xmlns="http://java.sun.com/xml/ns/persistence"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com
/xml/ns/persistence/persistence_1_0.xsd">
<persistence-unit name="myPU" transaction-type="RESOURCE_LOCAL">
<provider>org.hibernate.ejb.HibernatePersistence</provider>
<properties>
<property name="hibernate.dialect" value="org.hibernate.dialect.PostgreSQLDialect" />
<property name="hibernate.hbm2ddl" value="create-drop" />
<property name="hibernate.show_sql" value="true" />
</properties>
</persistence-unit>
</persistence>