我需要能够将数据库配置属性存储在应用程序jar很好地使用的外部文件中，并将其以jstl 表达式的形式包含在内。(如：${密码}等(？
<?xml version='1.0' encoding='UTF-8'?>
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
<session-factory>
<property name="hbm2ddl.auto">update</property>
<property name="dialect">org.hibernate.dialect.DB2Dialect</property>
<property name="connection.url">jdbc:db2://localhost:50001/svntools</property>
<property name="connection.username">root</property>
<property name="connection.password">root</property>
<property name="connection.driver_class">com.ibm.db2.jcc.DB2Driver</property>
-->
<property name="show_sql">true</property>
<mapping class="fr.gouv.education.sirhen.svnreporting.persistance.eo.BrancheEntity"/>
<mapping class="fr.gouv.education.sirhen.svnreporting.persistance.eo.RevisionEntity"/>
<mapping class="fr.gouv.education.sirhen.svnreporting.persistance.eo.ProjectEntity"/>
<mapping class="fr.gouv.education.sirhen.svnreporting.persistance.eo.StatistiqueEntity"/>
<mapping class="fr.gouv.education.sirhen.svnreporting.persistance.eo.DomaineEntity"/>
</session-factory>
</hibernate-configuration>
弹簧配置.xml文件
<?xml version="1.0" encoding="UTF-8"?>
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd>
<bean id="projectDAO" class="fr.gouv.education.sirhen.svnreporting.persistance.impl.ProjectDAOImpl">
</bean>
<bean id="reportDAO" class="fr.gouv.education.sirhen.svnreporting.persistance.impl.ReportDAOImpl" />
<bean id="brancheDAO" class="fr.gouv.education.sirhen.svnreporting.persistance.impl.BrancheDAOImpl" />
<bean id="domaineDAO" class="fr.gouv.education.sirhen.svnreporting.persistance.impl.DomaineDAOImpl" />
<bean id="svnKitDa"
class="fr.gouv.education.sirhen.svnreporting.domaine.DA.impl.SVNKitDAImpl" />
<bean id="RevisionServicesBean"
class="fr.gouv.education.sirhen.svnreporting.domaine.impl.RevisionsServicesImpl">
<property name="svnKitDa" ref="svnKitDa" />
<property name="brancheDAO" ref="brancheDAO" />
</bean>
<bean id="parser" class="fr.gouv.education.sirhen.svnreporting.transvers.utils.ParserImpl" />
<bean id="reportServices"
class="fr.gouv.education.sirhen.svnreporting.service.impl.ReportServicesImpl">
<property name="reportDAO" ref="reportDAO" />
<property name="brancheDAO" ref="brancheDAO" />
<property name="projectDAO" ref="projectDAO" />
<property name="parser" ref="parser" />
</bean>
<bean id="projectServices"
class="fr.gouv.education.sirhen.svnreporting.service.impl.ProjectServicesImpl">
<property name="projectDAO" ref="projectDAO" />
</bean>
<bean id="domaineServices"
class="fr.gouv.education.sirhen.svnreporting.service.impl.DomaineServicesImpl">
<property name="domaineDAO" ref="domaineDAO" />
</bean>
<bean id="generator"
class="fr.gouv.education.sirhen.svnreporting.domaine.generatorDocServices.impl.GeneratorDocServiceImpl" />
使用该会话的类：
package fr.gouv.education.sirhen.svnreporting.persistance.impl;
import java.io.File;
import java.util.LinkedList;
import java.util.List;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.hibernate.cfg.AnnotationConfiguration;
import org.hibernate.cfg.Configuration;
import fr.gouv.education.sirhen.svnreporting.persistance.ProjectDAO;
import fr.gouv.education.sirhen.svnreporting.persistance.eo.ProjectEntity;
public class ProjectDAOImpl implements ProjectDAO {
private static final String Location_Hibernate =
"resources/hibernate.cfg.xml";
private SessionFactory sessionFactory;
public SessionFactory getSessionFactory() {
return sessionFactory;
}
public void setSessionFactory(SessionFactory sessionFactory) {
this.sessionFactory = sessionFactory;
}
public void addProject(ProjectEntity project) {
File hibernatePropsFile = new File(Location_Hibernate);
Session session=new Configuration().configure(hibernatePropsFile).buildSessionFactory().openSession();
Transaction t=session.beginTransaction();
session.saveOrUpdate(project);
t.commit();
session.close();
}
public List<ProjectEntity> getProjects() {
File hibernatePropsFile = new File(Location_Hibernate);
Session session=new Configuration().configure(hibernatePropsFile).buildSessionFactory().openSession();
Transaction t=session.beginTransaction();
List<ProjectEntity> projects= session.createCriteria(ProjectEntity.class).list();
t.commit();
session.close();
return projects;
}
public List<String> getProjectsNames() {
File hibernatePropsFile = new File(Location_Hibernate);
Session session=new Configuration().configure(hibernatePropsFile).buildSessionFactory().openSession();
Transaction t=session.beginTransaction();
List<ProjectEntity> projects= session.createCriteria(ProjectEntity.class).list();
t.commit();
session.close();
List<String> ProjectsNames=new LinkedList<String>();
for( ProjectEntity projet : projects)
{
ProjectsNames.add(projet.getName());
}
return ProjectsNames;
}
}
另一种方法是您可以直接使用hibernate.properties文件而不是hibernate.cfg.xml。
但是，如果您想使用另一个文件，那么hibernate.properties文件，请参阅下面给出的链接：
如何在休眠中使用属性文件读取数据库配置参数
不过，如果你想单独读取属性文件，那么你可以使用普通的java代码读取，从类路径或相对文件路径读取属性文件，并使用ConfigurableEnvironmentof spring在环境中设置这些属性。
编辑答案
如果要在应用程序 (jar( 外部读取属性文件，则可以从相对文件路径以编程方式读取属性文件。 我之前提供了一个答案，读取属性文件的情况也是如此，您可以从那里按照我的编辑答案进行操作。
Spring Boot 嵌入式 Tomcat 未在 ApplicationListener 中加载外部属性文件
现在，您可以使用系统属性或环境属性来存储之前从相对文件路径加载的属性，然后它将在应用程序中的任何位置可用。
@Autowired
private ConfigurableEnvironment myEnv;
或
System.setProperty ("propertyName", "propertyValue");