创建型——Builder模式
UML：
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如何使用：
假设一个复杂对象由多个部件组成的。Builder模式是把复杂对象的创建和部件的创建分别开来，分别用Builder类和Director类来表示。
package com.lwf.create.builder;public interface Builder {//用于复杂对象的创建，而其部件的组装在Director类中。void builderPartA();void builderPartB();Product getResult();}?
package com.lwf.create.builder;public class ConcreateBuilder implements Builder {Part partA,partB;public void builderPartA() {partA = new Part();}public void builderPartB() {partB = new Part();}public Product getResult() {return new Product(partA,partB);}}?
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package com.lwf.create.builder;public class Director {//用于部件的组装Builder builder;public Director(Builder builder){this.builder = builder;}public void construct(){builder.builderPartA();builder.builderPartB();}}?
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package com.lwf.create.builder;public class Product {Part partA;Part partB;public Product(Part partA,Part partB){this.partA = partA;this.partB = partB;}}?
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package com.lwf.create.builder;public class Part {}?
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package com.lwf.create.builder;public class TestBuilder {public static void main(String[] args) {Builder builder = new ConcreateBuilder();Director director = new Director(builder);director.construct();//组装部件builder.getResult();//得到最终产品}}?
?代码见附件