设计模式-责任链模式

Author: dolyw

DesignPattern/src/main/java/com/design/chainofresponsibility/Main.java

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+package com.design.chainofresponsibility;
+
+/**
+ * 责任链模式(职责链模式)
+ *
+ * @author wliduo[i@dolyw.com]
+ * @date 2022/1/19 10:35
+ */
+public class Main {
+
+    public static void main(String[] args) {
+        StudentClient studentClient = new StudentClient();
+        studentClient.leave(3, "王明请假");
+        studentClient.leave(7, "王美丽请假");
+        studentClient.leave(10, "王小明请假");
+        studentClient.leave(13, "王晓婷请假");
+    }
+
+}

DesignPattern/src/main/java/com/design/chainofresponsibility/StudentClient.java

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+package com.design.chainofresponsibility;
+
+import com.design.chainofresponsibility.handler.AbstractLeaderHandle;
+import com.design.chainofresponsibility.handler.ClassAdviserHandle;
+import com.design.chainofresponsibility.handler.DeanHandle;
+import com.design.chainofresponsibility.handler.DepartmentHeadHandle;
+
+/**
+ * 学生客户端
+ *
+ * @author wliduo[i@dolyw.com]
+ * @date 2022/1/19 13:46
+ */
+public class StudentClient {
+
+    AbstractLeaderHandle abstractLeaderHandle;
+
+    /**
+     * 构造方法初始化责任链
+     */
+    public StudentClient() {
+        AbstractLeaderHandle classAdviserHandle = new ClassAdviserHandle();
+        AbstractLeaderHandle departmentHeadHandle = new DepartmentHeadHandle();
+        AbstractLeaderHandle deanHandle = new DeanHandle();
+        classAdviserHandle.setNext(departmentHeadHandle);
+        departmentHeadHandle.setNext(deanHandle);
+        abstractLeaderHandle = classAdviserHandle;
+    }
+
+    /**
+     * 请假方法
+     *
+     * @param day
+	 * @param remark
+     * @return void
+     * @throws
+     * @author wliduo[i@dolyw.com]
+     * @date 2022/1/19 13:52
+     */
+    public void leave(Integer day, String remark) {
+        abstractLeaderHandle.handleRequest(day, remark);
+    }
+
+}

DesignPattern/src/main/java/com/design/chainofresponsibility/handler/AbstractLeaderHandle.java

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+package com.design.chainofresponsibility.handler;
+
+/**
+ * 抽象处理者Handle
+ *
+ * @author wliduo[i@dolyw.com]
+ * @date 2022/1/19 11:06
+ */
+public abstract class AbstractLeaderHandle {
+
+    AbstractLeaderHandle next;
+
+    public AbstractLeaderHandle getNext() {
+        return next;
+    }
+
+    public void setNext(AbstractLeaderHandle next) {
+        this.next = next;
+    }
+
+    /**
+     * 处理请求的方法
+     *
+     * @param day
+     * @param remark
+     * @return void
+     * @throws
+     * @author wliduo[i@dolyw.com]
+     * @date 2022/1/19 11:08
+     */
+    public abstract void handleRequest(Integer day, String remark);
+
+    /**
+     * 上级处理
+     *
+     * @param next
+	 * @param day
+	 * @param remark
+     * @return void
+     * @throws
+     * @author wliduo[i@dolyw.com]
+     * @date 2022/1/19 11:33
+     */
+    public void handleNext(AbstractLeaderHandle next, Integer day, String remark) {
+        if (next != null) {
+            next.handleRequest(day, remark);
+        } else {
+            System.out.println("请假天数太多，没人批准，备注：" + remark);
+        }
+    }
+}

DesignPattern/src/main/java/com/design/chainofresponsibility/handler/ClassAdviserHandle.java

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+package com.design.chainofresponsibility.handler;
+
+/**
+ * 班主任具体处理者Concrete Handler
+ *
+ * @author wliduo[i@dolyw.com]
+ * @date 2022/1/19 11:06
+ */
+public class ClassAdviserHandle extends AbstractLeaderHandle {
+
+    /**
+     * 处理请求的方法
+     *
+     * @param day
+	 * @param remark
+     * @return void
+     * @throws
+     * @author wliduo[i@dolyw.com]
+     * @date 2022/1/19 11:21
+     */
+    @Override
+    public void handleRequest(Integer day, String remark) {
+        if (day <= 3) {
+            System.out.println("班主任批准了你的假期" + day + "天，备注：" + remark);
+        } else {
+            this.handleNext(this.getNext(), day, remark);
+        }
+    }
+}

DesignPattern/src/main/java/com/design/chainofresponsibility/handler/DeanHandle.java

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+package com.design.chainofresponsibility.handler;
+
+/**
+ * 院长具体处理者Concrete Handler
+ *
+ * @author wliduo[i@dolyw.com]
+ * @date 2022/1/19 11:06
+ */
+public class DeanHandle extends AbstractLeaderHandle {
+
+    /**
+     * 处理请求的方法
+     *
+     * @param day
+	 * @param remark
+     * @return void
+     * @throws
+     * @author wliduo[i@dolyw.com]
+     * @date 2022/1/19 11:21
+     */
+    @Override
+    public void handleRequest(Integer day, String remark) {
+        if (day <= 10) {
+            System.out.println("院长批准了你的假期" + day + "天，备注：" + remark);
+        } else {
+            this.handleNext(this.getNext(), day, remark);
+        }
+    }
+}

DesignPattern/src/main/java/com/design/chainofresponsibility/handler/DepartmentHeadHandle.java

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+package com.design.chainofresponsibility.handler;
+
+/**
+ * 系主任具体处理者Concrete Handler
+ *
+ * @author wliduo[i@dolyw.com]
+ * @date 2022/1/19 11:06
+ */
+public class DepartmentHeadHandle extends AbstractLeaderHandle {
+
+    /**
+     * 处理请求的方法
+     *
+     * @param day
+	 * @param remark
+     * @return void
+     * @throws
+     * @author wliduo[i@dolyw.com]
+     * @date 2022/1/19 11:21
+     */
+    @Override
+    public void handleRequest(Integer day, String remark) {
+        if (day <= 7) {
+            System.out.println("系主任批准了你的假期" + day + "天，备注：" + remark);
+        } else {
+            this.handleNext(this.getNext(), day, remark);
+        }
+    }
+}