How to get the properties file data info Spring Application

           How to get the properties file data info Spring App ?

Properties file :-

        

          The text file that maintains the entries as key value pairs is called properties file. We generally use properties file to maintain JDBC properties like dirverClassName,Url,username and password and  make them as flexible to modify without touching the source code. Spring application is added as new app to the existing project and if existing application can achieve this flexibility through xml file (Spring bean configuration file) if Spring application is added as new app to the existing project and if existing applications of that project and if existing application of that project are getting JDBC properties from properties file then are should make sure that spring application also get  JDBC properties from properties file.

 In ApplicationContext container environment we need to configure “org.springframework.beans.factory.config.PropertyPlaceHolderConfigure” class as spring bean to make container to locate given properties file and to recognize place holders in spring bean configuration file .

Place holders ---à${……………}

Each placeholder represents 1 key of the property file to get values from properties file.

DBDetails.properties(com/rg/commons)

Jdbc.driver=oracle.jdbc.driver.OracleDriver

Jdbc.url=  jdbc:oracle:thin:@lovalhost:1521:xe

db.user=system

db.pwd=manager

applicationContext.xml

<bean id=”ppc” class=”org.springframework.beans.factory.config.PropertyPlaceHolderConfigure”>

<property name=”location” value=”src/com/rg/commons/ DBDetails.properties”/>

</bean>

<bean id=”drds” class=”org.springframework.jdbc.datasource.DriverManagerDataSouce”>

<property name=”driverClassName” value=”${jdbc.driver}”/>

<property name=”url” value=”${jdbc.url}”/>

<property name=”username” value=”${jdbc.user}”/>

<property name=”password” value=”${jdbc.pwe}”}/>

</bean>