【生成器模式】将一个复杂对象的构建与它的表示分离,使同样的构建过程可以创建不同的表示。
package com.demo.builder;
import javax.swing.JPanel;
//指挥者指挥创建各个组件
public class Director {
private Builder builder;
Director(Builder builder){
this.builder=builder;
}
public JPanel constructProduct(){
builder.buildButton();
builder.buildLabel();
builder.buildTextField();
JPanel product=builder.getPanel();
return product;
}
}
package com.demo.builder;
import javax.swing.JButton;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextField;
//具体生成器
public class ConcreteBuilderOne implements Builder {
//需要创建的容器
private PanelProduct panel;
ConcreteBuilderOne(){
panel=new PanelProduct();
}
@Override
public void buildButton() {
// TODO Auto-generated method stub
panel.button=new JButton("按钮");
}
@Override
public void buildLabel() {
// TODO Auto-generated method stub
panel.label=new JLabel("标签");
}
@Override
public void buildTextField() {
// TODO Auto-generated method stub
panel.textField=new JTextField("文本框");
}
@Override
public JPanel getPanel() {
//添加组件的顺序不同
panel.add(panel.button);
panel.add(panel.label);
panel.add(panel.textField);
return panel;
}
}
package com.demo.builder;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class Application {
public static void main(String[] args) {
// TODO Auto-generated method stub
Builder builder=new ConcreteBuilderOne();
Director director=new Director(builder);
JPanel panel=director.constructProduct();
JFrame frameOne=new JFrame();
frameOne.add(panel);
frameOne.setBounds(12,12,200,120);
frameOne.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
frameOne.setVisible(true);
builder=new ConcreteBuilderTwo();
director=new Director(builder);
panel=director.constructProduct();
JFrame frameTwo=new JFrame();
frameTwo.add(panel);
frameTwo.setBounds(212,12,200,120);
frameTwo.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
frameTwo.setVisible(true);
}
}