如何通过database.properties文件使数据库配置可配置persistance.xml文件

时间：2016-02-28 17:29:49

标签： spring java-7 spring-data-jpa jpa-2.1

我想获得有关查询的确认“有没有办法通过在$(document).ready(function () { $("#selectBox").change(function(){ $("#selectBox option[value='selected']").remove(); }); 中使用database.properties进行数据库配置配置”。以下是否可能？

我的以下配置非常正常，

persistance.xml

但我有很多环境来部署Dev，QA，UAT，SAT，SystemTest等应用程序代码，所以我想进行如下配置 database.properties：

<?xml version="1.0" encoding="UTF-8"?>
<persistence version="2.1" xmlns="http://xmlns.jcp.org/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/persistence http://xmlns.jcp.org/xml/ns/persistence/persistence_2_1.xsd">
    <persistence-unit name="spring-data-jpa-krishna" transaction-type="RESOURCE_LOCAL">
        <class>net.javabeat.springdata.model.Address</class>
        <class>net.javabeat.springdata.model.Employee</class>

        <properties>
            <property name="javax.persistence.jdbc.url" value="jdbc:mysql://localhost:3306/test" />
            <property name="javax.persistence.jdbc.driver" value="com.mysql.jdbc.Driver" />
            <property name="javax.persistence.jdbc.user" value="root" />
            <property name="javax.persistence.jdbc.password" value="root" />

            <property name="hibernate.show_sql" value="true" />
            <property name="eclipselink.logging.level" value="FINE" />
            <property name="eclipselink.ddl-generation" value="create-tables" />
        </properties>
    </persistence-unit>
</persistence>

的persistence.xml 

mysql.jdbc.driver.class=com.mysql.jdbc.Driver
mysql.jdbc.url=jdbc:mysql://localhost:3306/test
mysql.jdbc.username=root
mysql.jdbc.password=root
hibernate.show_sql=true
eclipselink.logging.level=FINE
eclipselink.ddl-generation=create-tables

这有助于我解决我的开销。但我想知道<?xml version="1.0" encoding="UTF-8"?> <persistence version="2.1" xmlns="http://xmlns.jcp.org/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/persistence http://xmlns.jcp.org/xml/ns/persistence/persistence_2_1.xsd"> <persistence-unit name="spring-data-jpa-krishna" transaction-type="RESOURCE_LOCAL"> <class>net.javabeat.springdata.model.Address</class> <class>net.javabeat.springdata.model.Employee</class> <properties> <property name="javax.persistence.jdbc.url" value="${mysql.jdbc.url}" /> <property name="javax.persistence.jdbc.driver" value="${mysql.jdbc.driver.class}" /> <property name="javax.persistence.jdbc.user" value="${mysql.jdbc.username}" /> <property name="javax.persistence.jdbc.password" value="${mysql.jdbc.password}" /> <property name="hibernate.show_sql" value="${hibernate.show_sql}" /> <property name="eclipselink.logging.level" value="${eclipselink.logging.level}" /> <property name="eclipselink.ddl-generation" value="eclipselink.ddl-generation" /> </properties> </persistence-unit> </persistence> 如何加载persistece.xml才能正确获取占位符？

此How to externalize properties from JPAs persistence.xml?链接是通过JNDI完成的，但我只是想通过database.properties文件来完成。

编辑-1： 是的，我正在使用spring-Context.xml文件

database.properties

编辑-1：我现在看到以下错误： 

<?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:tx="http://www.springframework.org/schema/tx"
    xmlns:context="http://www.springframework.org/schema/context"
    xmlns:aop="http://www.springframework.org/schema/aop" xmlns:util="http://www.springframework.org/schema/util"
    xmlns:jpa="http://www.springframework.org/schema/data/jpa"
    xsi:schemaLocation="
        http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd 
        http://www.springframework.org/schema/data/jpa http://www.springframework.org/schema/data/jpa/spring-jpa.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">

    <!-- For consider the using of annotations foe defining Spring Bean -->
    <context:annotation-config />

    <!-- For defining Spring Bean -->
    <context:component-scan base-package="net.javabeat.springdata.beans" />

    <!-- For bootstrapping the Spring Repository -->
    <jpa:repositories base-package="net.javabeat.springdata.repository" />

    <!-- Necessary to get the entity manager injected into the factory bean -->
    <bean class="org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor" />

    <bean id="registrationBean" class="net.javabeat.springdata.beans.RegistrationBean" />


    <!-- =======  WAY-1    ========= -->
    <!-- ===== Define EclipseLink JPA Vendor Adapter ===== -->
    <bean id="jpaVendorAdapter" class="org.springframework.orm.jpa.vendor.EclipseLinkJpaVendorAdapter">
        <property name="databasePlatform" value="org.eclipse.persistence.platform.database.MySQLPlatform" />
        <property name="generateDdl" value="false" />
        <property name="showSql" value="true" />
    </bean>

    <!-- Entity Manager Factory -->
    <bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalEntityManagerFactoryBean">
        =========== Read persistent.xml file from here  ===========
        <property name="persistenceUnitName" value="spring-data-jpa-krishna" />
        <property name="jpaVendorAdapter" ref="jpaVendorAdapter" />
        <!-- spring based scanning for entity classes-->
        <property name="packagesToScan" value="net.javabeat.springdata.*" />
    </bean> 

    <!-- Transaction Manager -->
    <bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager">
        <property name="entityManagerFactory" ref="entityManagerFactory" />
    </bean>

    <!-- Enable Transactional Manner -->
    <tx:annotation-driven transaction-manager="transactionManager" />

</beans>

我在pom.xml文件中进行了更改：

Caused by: org.springframework.beans.factory.BeanCreationException: Could not autowire field: private net.javabeat.springdata.repository.EmployeeRepository net.javabeat.springdata.beans.RegistrationBean.employeeRepository; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'employeeRepository': Cannot create inner bean '(inner bean)#5d3c9c43' of type [org.springframework.orm.jpa.SharedEntityManagerCreator] while setting bean property 'entityManager'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name '(inner bean)#5d3c9c43': Cannot resolve reference to bean 'entityManagerFactory' while setting constructor argument; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in class path resource [SpringContext.xml]: Invocation of init method failed; nested exception is java.lang.IllegalStateException: PersistenceProvider [org.eclipse.persistence.jpa.PersistenceProvider@6201c010] did not return an EntityManagerFactory for name 'spring-data-jpa-krishna'
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:561)
    at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:88)
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:331)
    ... 13 more
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'employeeRepository': Cannot create inner bean '(inner bean)#5d3c9c43' of type [org.springframework.orm.jpa.SharedEntityManagerCreator] while setting bean property 'entityManager'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name '(inner bean)#5d3c9c43': Cannot resolve reference to bean 'entityManagerFactory' while setting constructor argument; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in class path resource [SpringContext.xml]: Invocation of init method failed; nested exception is java.lang.IllegalStateException: PersistenceProvider [org.eclipse.persistence.jpa.PersistenceProvider@6201c010] did not return an EntityManagerFactory for name 'spring-data-jpa-krishna'
    at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveInnerBean(BeanDefinitionValueResolver.java:313)
    at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveValueIfNecessary(BeanDefinitionValueResolver.java:129)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyPropertyValues(AbstractAutowireCapableBeanFactory.java:1475)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1220)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:537)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:476)
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:303)
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230)
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:299)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:194)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.findAutowireCandidates(DefaultListableBeanFactory.java:1120)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1044)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:942)
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:533)
    ... 15 more
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name '(inner bean)#5d3c9c43': Cannot resolve reference to bean 'entityManagerFactory' while setting constructor argument; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in class path resource [SpringContext.xml]: Invocation of init method failed; nested exception is java.lang.IllegalStateException: PersistenceProvider [org.eclipse.persistence.jpa.PersistenceProvider@6201c010] did not return an EntityManagerFactory for name 'spring-data-jpa-krishna'
    at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveReference(BeanDefinitionValueResolver.java:359)
    at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveValueIfNecessary(BeanDefinitionValueResolver.java:108)
    at org.springframework.beans.factory.support.ConstructorResolver.resolveConstructorArguments(ConstructorResolver.java:634)
    at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:444)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1117)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1012)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:504)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:476)
    at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveInnerBean(BeanDefinitionValueResolver.java:299)
    ... 28 more
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in class path resource [SpringContext.xml]: Invocation of init method failed; nested exception is java.lang.IllegalStateException: PersistenceProvider [org.eclipse.persistence.jpa.PersistenceProvider@6201c010] did not return an EntityManagerFactory for name 'spring-data-jpa-krishna'
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1572)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:539)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:476)
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:303)
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230)
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:299)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:194)
    at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveReference(BeanDefinitionValueResolver.java:351)
    ... 36 more
Caused by: java.lang.IllegalStateException: PersistenceProvider [org.eclipse.persistence.jpa.PersistenceProvider@6201c010] did not return an EntityManagerFactory for name 'spring-data-jpa-krishna'
    at org.springframework.orm.jpa.LocalEntityManagerFactoryBean.createNativeEntityManagerFactory(LocalEntityManagerFactoryBean.java:90)
    at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.afterPropertiesSet(AbstractEntityManagerFactoryBean.java:318)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1631)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1568)
    ... 43 more

的persistence.xml 

<build>
        <pluginManagement>
            <plugins>
                <plugin>
                    <groupId>org.apache.maven.plugins</groupId>
                    <artifactId>maven-compiler-plugin</artifactId>
                    <version>3.1</version>
                    <configuration>
                        <source>${java.version}</source>
                        <target>${java.version}</target>
                    </configuration>
                </plugin>
            </plugins>
        </pluginManagement>
        <!-- <filters>
            <filter>database.properties</filter>    
        </filters> -->
        <resources>
            <resource>
                <directory>src/main/resources</directory>
            </resource>
        </resources>
    </build>

1 个答案:

答案 0 :(得分：1)

当您使用Spring时，您可以选择不使用persistence.xml并通过名为EntityManagerFactory的{​​{1}}配置FactoryBean。这个answer可以让您了解如何配置LocalContainerEntityManagerFactoryBean。

如果您坚持使用LocalContainerEntityManagerFactoryBean，则可以在persistence.xml中添加${...}占位符，然后使用Maven的资源过滤填充实际值。使用这种方法，您应该将属性值定义为Maven属性，并且您不需要单独的persistence.xml。在这种方法中，您应该将属性添加为maven属性，如下所示：

database.properties

将这些添加到<properties> <mysql.jdbc.driver.class>com.mysql.jdbc.Driver</<mysql.jdbc.driver.class> <mysql.jdbc.url>jdbc:mysql://localhost:3306/test</mysql.jdbc.url> <mysql.jdbc.username>root</mysql.jdbc.username> <mysql.jdbc.password>root</mysql.jdbc.password> <hibernate.show_sql>true</hibernate.show_sql> <!-- You've got to be kidding me! --> <eclipselink.logging.level>FINE</eclipselink.logging.level> <eclipselink.ddl-generation>create-tables</eclipselink.ddl-generation> </properties> 中的构建部分：

pom.xml

<build> <resources> <resource> <directory>src/main/resources</directory> </resource> </resources> </build> 中资源中${...}语法的每个占位符都将替换为其实际值，即src/main/resources中properties部分中定义的那些占位符。

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