Spring 基于 Java 的配置 - 如何不用Beans.xml照样描述bean之间的依赖关系

import org.springframework.context.annotation.*;
@Configuration
public class TextEditorConfig {
   @Bean 
   public TextEditor textEditor(){
      return new TextEditor( spellChecker() );
   }
   @Bean 
   public SpellChecker spellChecker(){
      return new SpellChecker( );
   }
}

public class TextEditor {
   private SpellChecker spellChecker;
   public TextEditor(SpellChecker spellChecker){
      System.out.println("Inside TextEditor constructor." );
      this.spellChecker = spellChecker;
   }
   public void spellCheck(){
      spellChecker.checkSpelling();
   }
}

import org.springframework.context.ApplicationContext;
import org.springframework.context.annotation.*;

public class MainApp {
   public static void main(String[] args) {
      ApplicationContext ctx = 
      new AnnotationConfigApplicationContext(TextEditorConfig.class);

      TextEditor te = ctx.getBean(TextEditor.class);

      te.spellCheck();
   }
}