java builder 简单建造者模式

package builder;
/**
 * 建造者接口,用于定义建造者要实现的公共方法(也可以不使用接口用抽象类甚至是普通类代替)
 * @author Administrator
 *
 */
public interface Builder {
	/**
	 * 建造
	 */
	public void addBuild(String thing);
	/**
	 * 成果
	 */
	public void getResult();
}

 

package builder;

import java.util.List;

public class RealBuilder implements Builder {
	public Project pro;
	/**
	 * 构造方法注入产品
	 * @param pro
	 */
	public RealBuilder(Project pro){
		this.pro=pro;
	}

	@Override
	public void addBuild(String thing) {
		pro.addThing(thing);
	}

	@Override
	public void getResult() {
		List<String> reslist = pro.getResList();
		if(null!=reslist){
			for(String res:reslist){
				System.out.println(res);
			}
		}
	}

}

 

package builder;

import java.util.ArrayList;
import java.util.List;

/**
 * 建造产品
 * @author Administrator
 *
 */
public class Project {
	/**
	 * 部件列表
	 */
	public List<String> resList=new ArrayList<String>();

	public List<String> getResList() {
		return resList;
	} 
	/**
	 * 新增部件
	 * @param thing
	 */
	public void addThing(String thing){
		resList.add(thing);
	}
	
}

 

package builder;

public class BuilderMain {
public static void main(String[] args) {
	Project pro = new Project();
	RealBuilder builder = new RealBuilder(pro);
	builder.addBuild("A");
	builder.addBuild("B");
	builder.addBuild("C");
	builder.addBuild("D");
	builder.getResult();
}
}