java - Cannot access properties -

i got spring mvc application. runs on tomcat 7 server.

i want make props.properties file, app access properties during beans initialization process.

so did following:

1.create context-parameter web.xml

<context-param>         <param-name>mainprops</param-name>         <param-value>${catalina.home}/conf/props.properties</param-value>     </context-param> 

2. created maincobfig class

@configuration @propertysource("classpath:/racoonsoft/wish/properties/props.properties") @import({webconfig.class })  public class mainconfig { @autowired environment env;  @value("${db.host}") static string dbhost; @value("${db.name}") static string dbname; @value("${db.login}") static string dblogin; @value("${db.password}") static string dbpassword;  @value("${ozon.login}") static string ozonlogin; @value("${ozon.password}") static string ozonpassword; @value("${ozon.apiurl}") static string ozonapiurl;  @value("${payture.apihost}") static string paytureapihost; @value("${payture.merchant}") static string payturemerchant;  @bean public static propertysourcesplaceholderconfigurer propertysourcesplaceholderconfigurer() {     return new propertysourcesplaceholderconfigurer(); }  @bean public scheduledannotationbeanpostprocessor scheduledannotationbeanpostprocessor() {     return new scheduledannotationbeanpostprocessor(); }  @bean public ozonprocessor apiprocessor() {     return new ozonprocessor(ozonlogin, ozonpassword, ozonapiurl); }  @bean public pgsqldatasource pgsqldatasource() throws exception{     pgsqldatasource result = new pgsqldatasource(dbhost,dbname,5432,dblogin,dbpassword,"org.postgresql.driver","jdbc:postgresql:");     result.loadsettings();     if(facebookcontroller.dbproc==null)     {         facebookcontroller.dbproc = result;     }     //facebookcontroller.dbproc = result;     return result; } @bean public paytureprocessor paytureprocessor() {     paytureprocessor proc = new paytureprocessor(paytureapihost,payturemerchant);     return proc; } } 

3 - created props.properties file , put /conf directory

when start application didnt throw exception (file not found) - beleave sees properties file. during bean initialization fields (dbhost,dblogin etc.) still null`s.

how can put values properties file fields?

help me please.

the annotated factory method of propertysourcesplaceholderconfigurer must static method:

@bean public static propertysourcesplaceholderconfigurer propertysourcesplaceholderconfigurer() {     return new propertysourcesplaceholderconfigurer(); } 

spring api reference manual of @bean remarks this.

a little bit more detailed explanation:

this because propertysourcesplaceholderconfigurer beanfactorypostprocessor (bfpp). bfpp post-processing on bean factory before other (normal) beans being instantiated , intialized. so, bfpp's needed created in order work, before mainconfig bean instantiated. marking factory method static method, can invoke method without instantiating mainconfig.