Question

I was wondering is there an annotations based method for starting a spring application?

i.e. replacing this below:

    public static void main(String[] args) {

    ApplicationContext ctx = new ClassPathXmlApplicationContext("spring.xml");  

    User user = (User)ctx.getBean("user");
    user.createUser();

}

With an annotations based method for getting the context and then Autowiring in the bean?

Answer 1

You cannot avoid that ClassPathApplicationContextXml code but you can avoid that ctx.getBean(“user”) by doing as below. Ideally what it does is it asks the xml to scan the packages where spring want to inject things. The only thing you should not here is that i have declared my main class as spring Component, since springs annotations work on spring recognized classes and hence i am making my main as spring recognized class. The loading of xml using Classpathapplicationcontext cannot be avoided.

package com.spring.sample;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import org.springframework.stereotype.Component;

import com.spring.sample.component.Sample;

@Component
public class SampleMain {

    @Autowired
    Sample testSample;

    static ApplicationContext appCtx = new ClassPathXmlApplicationContext("META-INF/webmvc-application.xml");

    public static void main(String[] args){

        SampleMain sampleMain = appCtx.getBean(SampleMain.class);
        sampleMain.invokeSample();
    }

    private void invokeSample(){
        testSample.invokeSample();
    }

}