From fec95caac4b4608aee922023e1742576c09693bf Mon Sep 17 00:00:00 2001
From: limqhz <lmq540344226@163.com>
Date: Mon, 6 Mar 2023 10:08:30 +0800
Subject: [PATCH] =?UTF-8?q?=E8=AE=BE=E8=AE=A1=E6=A8=A1=E5=BC=8F?=
MIME-Version: 1.0
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Content-Transfer-Encoding: 8bit

---
 .../main/java/com/quinn/sjms/visitor/Element.java   | 10 ++++++++++
 .../java/com/quinn/sjms/visitor/ElementImpl.java    | 13 +++++++++++++
 .../com/quinn/sjms/visitor/ElementStructure.java    |  9 +++++++++
 .../main/java/com/quinn/sjms/visitor/IVisitor.java  | 12 ++++++++++++
 .../main/java/com/quinn/sjms/visitor/Visitor.java   |  8 ++++++++
 .../java/com/quinn/sjms/visitor/VisitorClient.java  | 11 +++++++++++
 6 files changed, 63 insertions(+)
 create mode 100644 sjms/src/main/java/com/quinn/sjms/visitor/Element.java
 create mode 100644 sjms/src/main/java/com/quinn/sjms/visitor/ElementImpl.java
 create mode 100644 sjms/src/main/java/com/quinn/sjms/visitor/ElementStructure.java
 create mode 100644 sjms/src/main/java/com/quinn/sjms/visitor/IVisitor.java
 create mode 100644 sjms/src/main/java/com/quinn/sjms/visitor/Visitor.java
 create mode 100644 sjms/src/main/java/com/quinn/sjms/visitor/VisitorClient.java

diff --git a/sjms/src/main/java/com/quinn/sjms/visitor/Element.java b/sjms/src/main/java/com/quinn/sjms/visitor/Element.java
new file mode 100644
index 0000000..e4dfa47
--- /dev/null
+++ b/sjms/src/main/java/com/quinn/sjms/visitor/Element.java
@@ -0,0 +1,10 @@
+package com.quinn.sjms.visitor;
+
+public abstract class Element {
+
+    //定义业务逻辑
+    public abstract void doSomething();
+    //允许谁来访问
+    public abstract void accept(IVisitor visitor);
+
+}
diff --git a/sjms/src/main/java/com/quinn/sjms/visitor/ElementImpl.java b/sjms/src/main/java/com/quinn/sjms/visitor/ElementImpl.java
new file mode 100644
index 0000000..e7916e2
--- /dev/null
+++ b/sjms/src/main/java/com/quinn/sjms/visitor/ElementImpl.java
@@ -0,0 +1,13 @@
+package com.quinn.sjms.visitor;
+
+public class ElementImpl extends Element {
+    @Override
+    public void doSomething() {
+        System.out.println("干饭");
+    }
+
+    @Override
+    public void accept(IVisitor visitor) {
+        visitor.visit(this);
+    }
+}
diff --git a/sjms/src/main/java/com/quinn/sjms/visitor/ElementStructure.java b/sjms/src/main/java/com/quinn/sjms/visitor/ElementStructure.java
new file mode 100644
index 0000000..57a8b20
--- /dev/null
+++ b/sjms/src/main/java/com/quinn/sjms/visitor/ElementStructure.java
@@ -0,0 +1,9 @@
+package com.quinn.sjms.visitor;
+
+public class ElementStructure {
+
+    public static Element createElement(){
+        return new ElementImpl();
+    }
+
+}
diff --git a/sjms/src/main/java/com/quinn/sjms/visitor/IVisitor.java b/sjms/src/main/java/com/quinn/sjms/visitor/IVisitor.java
new file mode 100644
index 0000000..ef8b0fb
--- /dev/null
+++ b/sjms/src/main/java/com/quinn/sjms/visitor/IVisitor.java
@@ -0,0 +1,12 @@
+package com.quinn.sjms.visitor;
+
+/**
+ * 抽象类或者接口，声明访问者可以访问哪些元素，具体到程序中就是visit方法的参数定
+ * 义哪些对象是可以被访问的。
+ */
+public interface IVisitor {
+
+    //可以访问哪些对象
+    void visit(ElementImpl el1);
+
+}
diff --git a/sjms/src/main/java/com/quinn/sjms/visitor/Visitor.java b/sjms/src/main/java/com/quinn/sjms/visitor/Visitor.java
new file mode 100644
index 0000000..c0ca398
--- /dev/null
+++ b/sjms/src/main/java/com/quinn/sjms/visitor/Visitor.java
@@ -0,0 +1,8 @@
+package com.quinn.sjms.visitor;
+
+public class Visitor implements IVisitor {
+    @Override
+    public void visit(ElementImpl el1) {
+        el1.doSomething();
+    }
+}
diff --git a/sjms/src/main/java/com/quinn/sjms/visitor/VisitorClient.java b/sjms/src/main/java/com/quinn/sjms/visitor/VisitorClient.java
new file mode 100644
index 0000000..019a4ff
--- /dev/null
+++ b/sjms/src/main/java/com/quinn/sjms/visitor/VisitorClient.java
@@ -0,0 +1,11 @@
+package com.quinn.sjms.visitor;
+
+public class VisitorClient {
+
+    public static void main(String[] args) {
+        Element element = ElementStructure.createElement();
+        Visitor visitor = new Visitor();
+        element.accept(visitor);
+    }
+
+}