feat:上传组合模式例子

README.md

@@ -44,7 +44,7 @@
 
 15.备忘录模式 - 已完成
 
-16.组合模式 - 整理中
+16.组合模式 - 已完成
 
 17.原型模式 - 整理中
 

src/main/com/mxy/design/composite/AbsFile.java

@@ -0,0 +1,7 @@
+package com.mxy.design.composite;
+
+public abstract class AbsFile {
+
+    protected abstract void print();
+
+}

src/main/com/mxy/design/composite/File.java

@@ -0,0 +1,22 @@
+package com.mxy.design.composite;
+
+import com.google.common.base.Strings;
+
+public class File extends AbsFile {
+
+
+    private String fileName;
+    private int level;
+
+    public  File(String fileName, int level) {
+        this.fileName = fileName;
+        this.level = level;
+    }
+
+    @Override
+    protected void print() {
+        System.out.println(Strings.repeat("-",level)+"|:"+fileName);
+    }
+
+
+}

src/main/com/mxy/design/composite/Folder.java

@@ -0,0 +1,65 @@
+package com.mxy.design.composite;
+
+import com.google.common.base.Strings;
+import com.google.common.collect.Lists;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class Folder extends AbsFile {
+
+    private String folderName;
+    private int level;
+    List<AbsFile> folders = new ArrayList<>();
+    List<AbsFile> files = new ArrayList<>();
+
+    public Folder(String folderName, int level) {
+        this.folderName = folderName;
+        this.level = level;
+    }
+
+    public int getLevel() {
+        return level;
+    }
+
+    public void setLevel(int level) {
+        this.level = level;
+    }
+
+    public List<AbsFile> getFiles() {
+        return files;
+    }
+
+    public void setFiles(List<AbsFile> files) {
+        this.files = files;
+    }
+
+    public String getFolderName() {
+        return folderName;
+    }
+
+    public void setFolderName(String folderName) {
+        this.folderName = folderName;
+    }
+
+    public Folder(AbsFile... file) {
+        files.addAll(Lists.newArrayList(file));
+    }
+
+
+    public void add(AbsFile folder) {
+        folders.add(folder);
+    }
+
+    @Override
+    protected void print() {
+        folders.addAll(files);
+        for (AbsFile file : folders) {
+            if (file instanceof Folder) {
+                System.out.println(Strings.repeat("-", ((Folder) file).getLevel()) + ":" + ((Folder) file).getFolderName());
+            }else {
+                file.print();
+            }
+        }
+    }
+}

src/test/com/mxy/design/composite/CompositeTest.java

@@ -0,0 +1,36 @@
+package com.mxy.design.composite;
+
+import org.junit.Test;
+
+/**
+ * 组合模式:又叫部分整体模式，是用于把一组相似的对象当作一个单一的对象。组合模式依据树形结构来组合对象，用来表示部分以及整体层次。
+ * JDK 中 Map#PutAll List#addAll 使用这种模式
+ * 场景：递归，树形结构,has a等场景
+ */
+public class CompositeTest {
+
+    @Test
+    public void logicTest() {
+
+        File file3 = new File("设计模式.pdf",3);
+        File file2 = new File("Core java.pdf",3);
+        File file1 = new File("Java自学技巧.pdf",3);
+
+        Folder folder = new Folder(file1,file2,file3);
+        folder.add(new Folder("收藏夹",1));
+        folder.add(new Folder("Java自学",2));
+
+        folder.print();
+
+        file2 = new File("火影忍者.pdf",3);
+        file1 = new File("七龙珠.pdf",3);
+        folder = new Folder(file1,file2);
+        folder.add(new Folder("漫画",2));
+
+        folder.print();
+
+
+    }
+
+
+}