Spring loads the Properties property file into memory

1. Custompropertyconfigurer.java

package propertyconfig;import java.util.hashmap;import java.util.map;import  java.util.properties;import java.util.map.entry;import org.springframework.beans.beansexception; import org.springframework.beans.factory.config.configurablelistablebeanfactory;import  org.springframework.beans.factory.config.propertyplaceholderconfigurer;import  org.springframework.util.propertyplaceholderhelper;public class custompropertyconfigurer  Extends propertyplaceholderconfigurer{private static map<string,string> properties  = new HashMap<String,String> ();p rotected void processproperties ( Configurablelistablebeanfactory beanfactorytoprocess,properties props)  throws  beansexception {// cache the propertiespropertyplaceholderhelper helper =  New propertyplaceholderhelper (Default_placeholder_prefix, default_placeholder_suffix, deFault_value_separator, false); for (Entry<object,object> entry:props.entryset ()) {String  Stringkey = string.valueof (Entry.getkey ()); String stringvalue = string.valueof (Entry.getvalue ());stringvalue =  Helper.replaceplaceholders (stringvalue, props);p roperties.put (stringkey, stringvalue);} Super.processproperties (beanfactorytoprocess, props);} Public static map<string, string> getproperties ()  {return properties;} Public static string getproperty (String key) {return properties.get (key);}}

 2. applicationcontext.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:p=" http://www.springframework.org/schema/p "       xmlns:aop= "HTTP://WWW.SPRINGFRAMEWORK.ORG/SCHEMA/AOP"       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 "       default-lazy-init= "true"  default-autowire= "ByName"  default-init-method= ""   Default-destroy-method= "" >          <bean id= " Propertyconfigurer "  class=" propertyconfig. CUstompropertyconfigurer ">          <property name = "Locations" >              <list >                   <value>classpath:propertyconfig/project.properties</value>               </list>           </property>      </bean>       </beans>

3. Project.Properties

Site=iteyeblog=antloveurl=${site}/${blog}

4. Main.java Test class

Package Propertyconfig;import Java.util.map;import Org.springframework.context.support.classpathxmlapplicationcontext;public class Main {public static void Main (String [] args) {new Classpathxmlapplicationcontext ("Propertyconfig/applicationcontext.xml"); map<string,string> properties = Custompropertyconfigurer.getproperties (); System.out.println (properties);}}

Spring loads the Properties property file into memory