Spring : how to replace constructor-arg by annotation?

Question

Possible Duplicate: replace with Spring Annotation i would like to replace an XML applicationContext configuration by an annotation. How to replace a simple bean with constructor arguments which are fixed ? Exemple : ```

``` I'm reading some explanation on @Value, but i don't really understand how to pass some fixed values... Is it possible to load this bean when the web application is deployed ? Thank you.

Accepted Answer

I think what you are after is this:

```
@Component
public class MyBean {
    private String xmlFile;
    private String xsdFile;

@Autowired
    public MyBean(@Value("$MYDIR/myfile.xml") final String xmlFile,
            @Value("$MYDIR/myfile.xsd") final String xsdFile) {
        this.xmlFile = xmlFile;
        this.xsdFile = xsdFile;
    }

//methods
}
```

You also might want these files to be configurable via system properties. You can use the `@Value` annotation to read system properties using the `PropertyPlaceholderConfigurer`, and the `${}` syntax.

To do this, you can use different `String` values in your `@Value` annotation:

```
@Value("${my.xml.file.property}")
@Value("${my.xsd.file.property}")
```

but you will also need these properties in your system properties:

```
my.xml.file.property=$MYDIR/myfile.xml
my.xsd.file.property=$MYDIR/myfile.xsd
```

Spring : how to replace constructor-arg by annotation?

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