Question

I have a Spring MVC Controller class that needs a property set from a config.properties file. I was thinking that since I already use this config file to set some db properties, I could access it in a similar way to set this property. The difference is that my Controller class is annotated and not declared in an XML file, so I can’t set the property that usual way. I have my config.properties ready to be used in my XML file as so:

    <context:property-placeholder location="/WEB-INF/config.properties" />

I would like to set the following property in my controller class from an entry in this properties file:

@Controller
public class SampleUploadController {

    private String audioFilePath;
    public String getAudioFilePath() {
        return audioFilePath;
    }
    // I want this set from the properties file I've declared in my 
    // XML file: e.g. ${props.audioFilePath}
    public void setAudioFilePath(String audioFilePath) {
        this.audioFilePath = audioFilePath;
    } 
}

Is this possible. If not, can somebody suggest how to get the property I need from the configuration file? It is located in my root WEB-INF. The problem is that I do not have access to ServletContext at this point to get a reference to where this file is.

Answer 1

In Spring 3, you can use the @Value annotation to do this, e.g.

@Value("${props.audioFilePath}")
public void setAudioFilePath(String audioFilePath) {
    this.audioFilePath = audioFilePath;
}