Spring 6.0官方文档示例（23): singleton类型的bean和prototype类型的bean协同工作的方法（二）

使用lookup-method:
一、实体类：

package cn.edu.tju.domain2;

import java.time.LocalDateTime;
import java.util.Map;

public class Command {
	private Map state;

	public Map getState() {
		return state;
	}

	public void setState(Map state) {
		this.state = state;
	}

	public Object execute(){
		System.out.println(LocalDateTime.now().toLocalTime());
		return null;
	}

}

package cn.edu.tju.domain2;

import java.util.HashMap;

public abstract class CommandManager {
	public Object process(Object commandState) {
		// grab a new instance of the appropriate Command interface
		Command command = createCommand();
		System.out.println("hash: " + command.hashCode());
		// set the state on the (hopefully brand new) Command instance
		command.setState(new HashMap());
		return command.execute();
	}
	// okay... but where is the implementation of this method?
	protected abstract Command createCommand();

}

二、配置文件：

三、主类：

package cn.edu.tju;

import cn.edu.tju.domain2.CommandManager;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import java.util.HashMap;

public class TestDiffScope2 {
	public static void main(String[] args) {
		ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext("test8.xml","test2.xml");
		CommandManager commandManager = context.getBean("commandManager", CommandManager.class);
		commandManager.process(new HashMap());
		CommandManager commandManager2 = context.getBean("commandManager", CommandManager.class);
		commandManager2.process(new HashMap<>());
	}
}