Java – spring @ Autowired constructor given no default constructor found

Here are some strange behaviors from spring 3.0

package com.service.schedule;

import org.springframework.stereotype.Component;

@Component("outroJob")
public class OutroJob {

    public void printMe() {
        System.out.println("running...");
    }

}

and

package com.service.schedule;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.xml.Xmlbeanfactory;
import org.springframework.core.io.ClassPathResource;
import org.springframework.stereotype.Component;

@Component("testeAutowired")
public class TesteAutowired {

    @Autowired
    public TesteAutowired(OutroJob outroJob) {
        outroJob.printMe();
    }

    public static void main(String[] args) {
        ClassPathResource res = new ClassPathResource("applicationContext.xml");
        Xmlbeanfactory ctx = new Xmlbeanfactory(res);

        OutroJob outroJob = (OutroJob) ctx.getBean("outroJob");
        outroJob.printMe(); // gives: running...

        ctx.getBean("testeAutowired");
    }
}

None of these beans are in ApplicationContext Declaration on XML

So, line outrojob printMe(); Working properly... Print "running..."

But when I tried to get the "testautowired" bean, it said:

The question is: why doesn't spring automatically start the "outrojob" bean on the testeautowired constructor if it finds it?

It obviously needs to do something

Solution

Try using ApplicationContext instead of xmlbeanfactory Xmlbeanfactory does not post - process annotations, that is, it does not use autowiredannotationbeanpostprocessor to explain the behavior you encounter

Here’s some more explanation