本文共 4716 字，大约阅读时间需要 15 分钟。

?????????CPU???

1.1 CPU

Intel?CPU???

public class IntelCPU implements CPUApi {
    private int pins = 0;
    public IntelCPU(int pins) {
        this.pins = pins;
    }
    public void calculate() {
        System.out.println("now in Intel CPU,pins=" + pins);
    }
}

AMDCPU?

public class AMDCPU implements CPUApi {
    private int pins = 0;
    public AMDCPU(int pins) {
        this.pins = pins;
    }
    public void calculate() {
        System.out.println("now in AMD CPU,pins=" + pins);
    }
}

1.2 ??

??????

public interface MainboardApi {
    public void installCPU();
}

?????

public class GAMainboard implements MainboardApi {
    private int cpuHoles = 0;
    public GAMainboard(int cpuHoles) {
        this.cpuHoles = cpuHoles;
    }
    public void installCPU() {
        System.out.println("now in GAMainboard,cpuHoles=" + cpuHoles);
    }
}

?????

public class MSIMainboard implements MainboardApi {
    private int cpuHoles = 0;
    public MSIMainboard(int cpuHoles) {
        this.cpuHoles = cpuHoles;
    }
    public void installCPU() {
        System.out.println("now in MSIMainboard,cpuHoles=" + cpuHoles);
    }
}

1.3 ??CPU??????

??CPU??????

public class CPUFactory {
    public static CPUApi createCPUApi(int type) {
        CPUApi cpu = null;
        if (type == 1) {
            cpu = new IntelCPU(1156);
        } else if (type == 2) {
            cpu = new AMDCPU(939);
        }
        return cpu;
    }
}

??????????

public class MainboardFactory {
    public static MainboardApi createMainboardApi(int type) {
        MainboardApi mainboard = null;
        if (type == 1) {
            mainboard = new GAMainboard(1156);
        } else if (type == 2) {
            mainboard = new MSIMainboard(939);
        }
        return mainboard;
    }
}

1.4 ???

public class ComputerEngineer {
    private CPUApi cpu = null;
    private MainboardApi mainboard = null;
    public void makeComputer(int cpuType, int mainboardType) {
        prepareHardwares(cpuType, mainboardType);
        // ????
        // ????
        // ????
    }
    private void prepareHardwares(int cpuType, int mainboardType) {
        this.cpu = CPUFactory.createCPUApi(cpuType);
        this.mainboard = MainboardFactory.createMainboardApi(mainboardType);
        this.cpu.calculate();
        this.mainboard.installCPU();
    }
}

client?

public static void main(String[] args) {
    ComputerEngineer engineer = new ComputerEngineer();
    engineer.makeComputer(1, 2);
}

2. ????????

??????????

public interface AbstractFactory {
    public AbstractProductA createProductA();
    public AbstractProductB createProductB();
}

public class Schema1 implements AbstractFactory {
    public CPUApi createCPUApi() {
        return new IntelCPU(1156);
    }
    public MainboardApi createMainboardApi() {
        return new GAMainboard(1156);
    }
}

public class ComputerEngineer {
    private CPUApi cpu = null;
    private MainboardApi mainboard = null;
    private MemoryApi memory = null;
    public void makeComputer(AbstractFactory schema) {
        prepareHardwares(schema);
        // ????
        // ????
        // ????
    }
    private void prepareHardwares(AbstractFactory schema) {
        this.cpu = (CPUApi) schema.createProduct(1);
        this.mainboard = (MainboardApi) schema.createProduct(2);
        this.memory = (MemoryApi) schema.createProduct(3);
        this.cpu.calculate();
        this.mainboard.installCPU();
        if (memory != null) {
            this.memory.cacheData();
        }
    }
}

3. ????????

public class Schema3 implements AbstractFactory {
    public Object createProduct(int type) {
        Object retObj = null;
        if (type == 1) {
            retObj = new IntelCPU(1156);
        } else if (type == 2) {
            retObj = new GAMainboard(1156);
        } else if (type == 3) {
            retObj = new HyMemory();
        }
        return retObj;
    }
}

public class ComputerEngineer { private CPUApi cpu = null; private MainboardApi mainboard = null; private MemoryApi memory = null;

public void makeComputer(AbstractFactory schema) {
    prepareHardwares(schema);
    // ????
    // ????
    // ????
}
private void prepareHardwares(AbstractFactory schema) {
    this.cpu = (CPUApi) schema.createProduct(1);
    this.mainboard = (MainboardApi) schema.createProduct(2);
    this.memory = (MemoryApi) schema.createProduct(3);
    this.cpu.calculate();
    this.mainboard.installCPU();
    if (memory != null) {
        this.memory.cacheData();
    }
}

}

public static void main(String[] args) { ComputerEngineer engineer = new ComputerEngineer(); AbstractFactory schema = new Schema3(); engineer.makeComputer(schema); }

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