設計模式----裝飾者模式（decorator pattern）
阿新 • • 發佈：2019-01-28
SchoolReport.java程式碼如下：
FouthGradeSchoolReport.java程式碼如下：
Decorator.java程式碼如下：
HighScoreDecorator.java程式碼如下：
SortDecorator.java程式碼如下：
Father.java程式碼如下：
執行結果如下：
package com.designPattern.decorator;
public abstract class SchoolReport {
public abstract void report();
public abstract void sign(String name);
}
FouthGradeSchoolReport.java程式碼如下：
package com.designPattern.decorator;
public class FouthGradeSchoolReport extends SchoolReport{
@Override
public void report() {
System.out.println("========以下是成績單原裝內容！============");
System.out.println("+++++++++++++++++++++++++++++++++++");
System.out.println("+++++++++++++++++++++++++++++++++++");
System.out.println("+++++++++++++++++++++++++++++++++++");
System.out.println("+++++++++++++++++++++++++++++++++++");
System.out.println("+++++++++++++++++++++++++++++++++++");
System.out.println("========以上是成績單原裝內容！============");
}
@Override
public void sign(String name) {
System.out.println("家長簽名為：" +name);
}
}
Decorator.java程式碼如下：
package com.designPattern.decorator;
public abstract class Decorator extends SchoolReport{
private SchoolReport schoolReport;
public Decorator(SchoolReport schoolReport){
this.schoolReport =schoolReport;
}
public void report(){
this.schoolReport.report();
}
public void sign(String name){
this.schoolReport.sign(name);
}
}
HighScoreDecorator.java程式碼如下：
package com.designPattern.decorator;
public class HighScoreDecorator extends Decorator{
public HighScoreDecorator(SchoolReport schoolReport) {
super(schoolReport);
}
public void reportHighScore(){
System.out.println("這次語文成績最高是75，數學是78,自然是80");
}
public void report(){
this.reportHighScore();
super.report();
}
}
SortDecorator.java程式碼如下：
package com.designPattern.decorator;
public class SortDecorator extends Decorator{
public SortDecorator(SchoolReport schoolReport) {
super(schoolReport);
}
private void reportSort(){
System.out.println("我排名第38名");
}
@Override
public void report() {
super.report();
this.reportSort();
}
}
Father.java程式碼如下：
package com.designPattern.decorator;
public class Father {
public static void main(String[] args) {
SchoolReport schoolReport;
schoolReport = new FouthGradeSchoolReport();
schoolReport = new HighScoreDecorator(schoolReport);
schoolReport = new SortDecorator(schoolReport);
schoolReport.report();
schoolReport.sign("one'father");
}
}
執行結果如下：
這次語文成績最高是75，數學是78,自然是80
========以下是成績單原裝內容！============
+++++++++++++++++++++++++++++++++++
+++++++++++++++++++++++++++++++++++
+++++++++++++++++++++++++++++++++++
+++++++++++++++++++++++++++++++++++
+++++++++++++++++++++++++++++++++++
========以上是成績單原裝內容！============
我排名第38名
家長簽名為：one'father