设计模式

code/Java/design-pattern/src/main/java/com/heibaiying/structural/flyweight/ArtPPT.java

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+package com.heibaiying.structural.flyweight;
+
+public class ArtPPT extends PowerPoint {
+
+	public ArtPPT(String copyright) {
+		super(copyright);
+	}
+
+	@Override
+	void create() {
+		System.out.println("艺术类PPT模板");
+	}
+}

code/Java/design-pattern/src/main/java/com/heibaiying/structural/flyweight/BusinessPPT.java

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+package com.heibaiying.structural.flyweight;
+
+public class BusinessPPT extends PowerPoint {
+
+	public BusinessPPT(String copyright) {
+		super(copyright);
+	}
+
+	@Override
+	void create() {
+		System.out.println("商务类PPT模板");
+	}
+}

code/Java/design-pattern/src/main/java/com/heibaiying/structural/flyweight/PPTFactory.java

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+package com.heibaiying.structural.flyweight;
+
+
+import java.lang.reflect.Constructor;
+import java.util.HashMap;
+
+public class PPTFactory {
+
+	private HashMap<String, PowerPoint> hashMap = new HashMap<>();
+
+	public PowerPoint getPPT(Class<? extends PowerPoint> clazz) {
+		try {
+			String name = clazz.getName();
+			if (hashMap.keySet().contains(name)) {
+				return hashMap.get(name);
+			}
+			Constructor<?> constructor = Class.forName(name).getConstructor(String.class);
+			PowerPoint powerPoint = (PowerPoint) constructor.newInstance("PPT工厂版本所有");
+			hashMap.put(name, powerPoint);
+			return powerPoint;
+		} catch (Exception e) {
+			e.printStackTrace();
+		}
+		return null;
+	}
+}

code/Java/design-pattern/src/main/java/com/heibaiying/structural/flyweight/PowerPoint.java

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+package com.heibaiying.structural.flyweight;
+
+import lombok.ToString;
+
+public abstract class PowerPoint {
+	/*版权*/
+	private String copyright;
+	private String title;
+
+	public PowerPoint(String copyright) {
+		this.copyright = copyright;
+	}
+
+	public void setTitle(String title) {
+		this.title = title;
+	}
+
+	abstract void create();
+
+	@Override
+	public String toString() {
+		return "编号：" + hashCode() + ": PowerPoint{" +
+			"copyright='" + copyright + '\'' +
+			", title='" + title + '\'' +
+			'}';
+	}
+}

code/Java/design-pattern/src/main/java/com/heibaiying/structural/flyweight/SciencePPT.java

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+package com.heibaiying.structural.flyweight;
+
+public class SciencePPT extends PowerPoint {
+
+	public SciencePPT(String copyright) {
+		super(copyright);
+	}
+
+	@Override
+	void create() {
+		System.out.println("科技类PPT模板");
+	}
+}

code/Java/design-pattern/src/main/java/com/heibaiying/structural/flyweight/ZTest.java

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+package com.heibaiying.structural.flyweight;
+
+public class ZTest {
+	public static void main(String[] args) {
+		PPTFactory pptFactory = new PPTFactory();
+		PowerPoint ppt01 = pptFactory.getPPT(BusinessPPT.class);
+		ppt01.setTitle("第一季度工作汇报");
+		System.out.println(ppt01);
+		PowerPoint ppt02 = pptFactory.getPPT(BusinessPPT.class);
+		ppt02.setTitle("第二季度工作汇报");
+		System.out.println(ppt02);
+		PowerPoint ppt03 = pptFactory.getPPT(SciencePPT.class);
+		ppt03.setTitle("科技展汇报");
+		System.out.println(ppt03);
+	}
+}

code/Java/design-pattern/src/main/java/com/heibaiying/structural/proxy/cglib/ComputeService.java

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+package com.heibaiying.structural.proxy.cglib;
+
+public class ComputeService {
+	public void compute() {
+		System.out.println("业务处理");
+	}
+}

code/Java/design-pattern/src/main/java/com/heibaiying/structural/proxy/cglib/Proxy.java

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+package com.heibaiying.structural.proxy.cglib;
+
+import net.sf.cglib.proxy.Enhancer;
+import net.sf.cglib.proxy.MethodInterceptor;
+import net.sf.cglib.proxy.MethodProxy;
+
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
+
+public class Proxy implements MethodInterceptor {
+
+	private Object target;
+
+	public Proxy(Object target) {
+		this.target = target;
+	}
+
+	public Object getProxyInstance() {
+		// 创建用于生成生成动态子类的工具类
+		Enhancer enhancer = new Enhancer();
+		// 指定动态生成类的父类
+		enhancer.setSuperclass(target.getClass());
+		// 设置回调
+		enhancer.setCallback(this);
+		// 动态生成子类
+		return enhancer.create();
+	}
+
+	@Override
+	public Object intercept(Object obj, Method method, Object[] args, MethodProxy proxy) throws InvocationTargetException, IllegalAccessException {
+		System.out.println("权限校验");
+		Object invoke = method.invoke(target, args);
+		System.out.println("资源回收");
+		return invoke;
+	}
+}

code/Java/design-pattern/src/main/java/com/heibaiying/structural/proxy/cglib/ZTest.java

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+package com.heibaiying.structural.proxy.cglib;
+
+public class ZTest {
+	public static void main(String[] args) {
+		Proxy proxy = new Proxy(new ComputeService());
+		ComputeService service = (ComputeService) proxy.getProxyInstance();
+		service.compute();
+	}
+}

code/Java/design-pattern/src/main/java/com/heibaiying/structural/proxy/dynamic_proxy/ComputeService.java

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+package com.heibaiying.structural.proxy.dynamic_proxy;
+
+public class ComputeService implements IService {
+	@Override
+	public void compute() {
+		System.out.println("业务处理");
+	}
+}

code/Java/design-pattern/src/main/java/com/heibaiying/structural/proxy/dynamic_proxy/IService.java

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+package com.heibaiying.structural.proxy.dynamic_proxy;
+
+public interface IService {
+	void compute();
+}

code/Java/design-pattern/src/main/java/com/heibaiying/structural/proxy/dynamic_proxy/ZTest.java

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+package com.heibaiying.structural.proxy.dynamic_proxy;
+
+import java.lang.reflect.Proxy;
+
+public class ZTest {
+	public static void main(String[] args) {
+		ComputeService target = new ComputeService();
+		IService proxyInstance = (IService) Proxy.newProxyInstance(
+			target.getClass().getClassLoader(),
+			target.getClass().getInterfaces(),
+			(proxy, method, args1) -> {
+				System.out.println("权限校验");
+				Object invoke = method.invoke(target, args1);
+				System.out.println("资源回收");
+				return invoke;
+			});
+		proxyInstance.compute();
+	}
+}

code/Java/design-pattern/src/main/java/com/heibaiying/structural/proxy/static_proxy/ComputeService.java

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+package com.heibaiying.structural.proxy.static_proxy;
+
+public class ComputeService implements IService {
+	@Override
+	public void compute() {
+		System.out.println("业务处理");
+	}
+}

code/Java/design-pattern/src/main/java/com/heibaiying/structural/proxy/static_proxy/IService.java

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+package com.heibaiying.structural.proxy.static_proxy;
+
+public interface IService {
+	void compute();
+}

code/Java/design-pattern/src/main/java/com/heibaiying/structural/proxy/static_proxy/ProxyService.java

@@ -0,0 +1,17 @@
+package com.heibaiying.structural.proxy.static_proxy;
+
+public class ProxyService implements IService {
+
+	private IService target;
+
+	public ProxyService(IService target) {
+		this.target = target;
+	}
+
+	@Override
+	public void compute() {
+		System.out.println("权限校验");
+		target.compute();
+		System.out.println("资源回收");
+	}
+}

code/Java/design-pattern/src/main/java/com/heibaiying/structural/proxy/static_proxy/ZTest.java

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+package com.heibaiying.structural.proxy.static_proxy;
+
+public class ZTest {
+	public static void main(String[] args) {
+		ProxyService proxyService = new ProxyService(new ComputeService());
+		proxyService.compute();
+	}
+}