Reading the content of property file in Spring Validator Class

Question

Hi

I am using Spring 3.0. Can i read a property file from a localdrive eg: C:\prop\mylogin.properties(not under webapps/application server)

mylogin.properties

login.heading=Login
login.username=Username
login.password_blank=Password cannot be blank

I want to use the above in my Validator class(java bean class). Please Note : I using MultiAction Controller not SpringFormController

 public class MyUserValidator implements Validator 
    {

@Override
    public void validate(Object command, Errors errors) {
         String msg=null;
     //some conditions checked
         String msg=login.password_blank;-------->get from property file ??
        errors.rejectValue("User",msg,"defaultvalue");   

}

Hi we are using resource bundle, not sure how this will need to be used within validator?

<bean id="messageSource" class="org.springframework.context.support.ReloadableResourceBundleMessageSource" lazy-init="true"> 
       <property name="basenames"> 
       <list> 

      <value>${deployment.properties.path}/xyzsite/mylogin</value>   

 </list> 
 </property> 
<property name="cacheSeconds" value="${deployment.properties.cache_in_seconds}"/> 
</bean> 

What change i cud make in the answer u have mentioned if resource bundle is been used?

for example if i want to set a PageSize int pagesize=5; ---> get this from property file

mylogin.properties

login.heading=Login
login.username=Username
login.password_blank=Password cannot be blank
login.page_row_size=5

Answer 1

Error messages are usually best handled as a standard combination of a Java ResourceBundle and JSTL, but that won't work for loading the properties from an arbitrary location on the filesystem.

So you'll have to do things a bit more manually. The simplest thing would be to inject the location of the properties file, then extract the properties from it:

public class MyUserValidator implements Validator {

    private Resource propertiesLocation;

    @Required
    public void setPropertiesLocation(Resource propertiesLocation) {
        this.propertiesLocation = propertiesLocation;
    }

    @Override
    public void validate(Object command, Errors errors) {
        try {
            Properties props = PropertiesLoaderUtils.loadProperties(propertiesLocation);

            String key = "login.password_blank";
            String errorMessage = props.getProperty(key);
            errors.rejectValue("User", key, errorMessage);
        } catch (IOException e) {
            // handle me
        }
    }
}

and in the config:

<bean id="userValidator" class="com.x.MyUserValidator">
  <property name="propertiesLocation" value="file:/prop/mylogin.properties"/>
</bean>

Note the following line:

errors.rejectValue("User", key, errorMessage);

Since you're not using ResourceBundle, you need to pass in the "default error message" as the 3rd argument.

Answer 2

Alright got this sorted by doing following mav= new ModelAndView mav.addAllObjects(errors.getModel());

and in jsp using