设计模式之Builder

Robot.java

package test;/** * 机器人类 * @author 贺圆波 * */public class Robot {// 机器人头部private String head;// 机器人身体private String body;// 机器人脚部private String foot;public String getHead() {return head;}public void setHead(String head) {this.head = head;}public String getBody() {return body;}public void setBody(String body) {this.body = body;}public String getFoot() {return foot;}public void setFoot(String foot) {this.foot = foot;}}

Builder.java

package test;public interface Builder {public void buildHead();public void buildBody();public void buildFoot();public Robot getRobot();}

RobotBuilder.java

package test;/** * 工人类 * @author 贺圆波 * */public class RobotBuilder implements Builder {private Robot robot = new Robot();public void buildBody() {robot.setBody("身体");System.out.println("制造身体部分...");}public void buildFoot() {robot.setFoot("脚");System.out.println("制造脚...");}public void buildHead() {robot.setHead("头");System.out.println("制造头部...");}public Robot getRobot() {System.out.println("robot.getHead():" + robot.getHead());System.out.println("robot.getBody():" + robot.getBody());System.out.println("robot.getFoot():" + robot.getFoot());System.out.println("机器人组装成功！");return robot;}}

Director.java

package test;/** * 工程师类 * @author 贺圆波 * */public class Director {private Builder builder;// 工人听从工程师的指导public Director(Builder builder){this.builder = builder;}// 工程师指导工人制造机器人public void construct() {// 工人先制造机器人头部builder.buildHead();// 工人然后制造机器人身体builder.buildBody();// 工人最后制造机器人脚部builder.buildFoot();}}

 

Customer.java

package test;/** * 客户类 * @author 贺圆波 * */public class Customer {public static void main(String[] args) {RobotBuilder builder = new RobotBuilder();// 把工人分配给工程师Director director = new Director(builder);// 工程师指导工人制造机器人director.construct();// 工人制造完成一个新的机器人builder.getRobot();}}

 

输出：

制造头部...
制造身体部分...
制造脚...
robot.getHead():头
robot.getBody():身体
robot.getFoot():脚
机器人组装成功！