代码如下，可根据需求衍生出各种格式的输出和使用
 package test;
import java.util.ArrayList;
import java.util.List;
  public class Folder ...{
  public Folder(String title) ...{
 this.title = title;
 }
private String title;
private List<Folder> children = new ArrayList<Folder>();
public void addChild(Folder f) ...{
children.add(f);
}
public List<Folder> getChildren() ...{
return children;
}
public void setChildren(List<Folder> children) ...{
this.children = children;
}
public String getTitle() ...{
return title;
}
public void setTitle(String title) ...{
this.title = title;
}
public String toString(String lftStr, String append) ...{
StringBuilder b = new StringBuilder();
b.append(append + title);
b.append("\n");
if (children.size() > 0) ...{
for (int i = 0; i < children.size() - 1; i++) ...{
b.append(lftStr+children.get(i).toString(lftStr + "│", "├"));
}
b.append(lftStr + children.get(children.size() - 1).toString(
lftStr + " ", "└"));
}
return b.toString();
}
public static void main(String[] args) ...{
Folder root = new Folder("菜单列表");
Folder f1 = new Folder("开始菜单");
root.addChild(f1);
Folder f1_1 = new Folder("程序");
f1.addChild(f1_1);
Folder f1_1_1 = new Folder("附件");
f1_1.addChild(f1_1_1);
Folder f1_1_1_1 = new Folder("娱乐");
f1_1_1.addChild(f1_1_1_1);
Folder f1_1_1_2 = new Folder("娱乐2");
f1_1_1.addChild(f1_1_1_2);
Folder f1_2 = new Folder("辅助工具");
f1.addChild(f1_2);
Folder f2 = new Folder("My Documents ");
root.addChild(f2);
Folder f3 = new Folder("My Documents2 ");
root.addChild(f3);
System.out.println(root.toString(" ", ""));
}
 }
运行结果如下：
菜单列表
├开始菜单
│├程序
││└附件
││ ├娱乐
││ └娱乐2
│└辅助工具
├My Documents
└My Documents2
应网友要求，增加了JDK 1.4版及以下的程序版本，取消了泛型
| 
设为首页
加入收藏
联系我们
