spring dependency injection in any java bean

I have application that look like below

without spring (prior)

UI-> service --> 开发者_开发技巧javabean

p.s: my ui call service (not using DI) and i want to remain this way

new service()

I want my javabean to do DI for certain bean from applicationcontext.xml file. Should i use Applicationcontext.getBean(the ..xml) file in javabean or is there any better way to do it without changing the service layer and only modify the javabean in bold?

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You should look at @Configurable annotation (Tutorial).

The basic idea is that you add this annotation to your bean class. It will then inject any properties as soon as you create a new instance:

@Configurable
public class Person {
    private IPeopleDAO _dao;

    // SNIP

    public save() {
        _dao.save(this);
    }
}

// use it like this
new Person("john", "doe").save();