策略模式

Author: EruDev

src/main/java/com/erudev/design/strategy/shopping/CashContext.java

@@ -0,0 +1,17 @@
+package com.erudev.design.strategy.shopping;
+
+/**
+ * Created by eru on 2020/1/23.
+ */
+public class CashContext {
+
+    private CashSuper cs;
+
+    public CashContext(CashSuper cashSuper){
+        this.cs = cashSuper;
+    }
+
+    public double getResult(double money){
+        return cs.acceptCash(money);
+    }
+}

src/main/java/com/erudev/design/strategy/shopping/CashFactory.java

@@ -5,19 +5,19 @@
  * Created by eru on 2020/1/23.
  */
 public class CashFactory {
-    public static CashSuper createCash(String condition){
-        CashSuper cs = null;
+    public static CashContext createCash(String condition){
+        CashContext cc = null;
         switch (condition){
             case "正常收费":
-                cs = new CashNormal();
+                cc = new CashContext(new CashNormal());
                 break;
             case "满300返100":
-                cs = new CashReturn("300", "100");
+                cc = new CashContext(new CashReturn("300", "100"));
                 break;
             case "打8折":
-                cs = new CashRebate("0.8");
+                cc = new CashContext(new CashRebate("0.8"));
                 break;
         }
-        return cs;
+        return cc;
     }
 }

src/main/java/com/erudev/design/strategy/shopping/Main.java

@@ -6,8 +6,8 @@
  */
 public class Main {
     public static void main(String[] args) {
-        CashSuper cs = CashFactory.createCash("打8折");
-        double result = cs.acceptCash(300);
+        CashContext cc = CashFactory.createCash("打8折");
+        double result = cc.getResult(300);
         System.out.println("result = " + result);
     }
 }