用JAVA实现文本形式的树状结构显示代码

代码如下，可根据需求衍生出各种格式的输出和使用

packagetest;

importjava.util.ArrayList;
importjava.util.List;

publicclassFolder{
publicFolder(Stringtitle){
this.title=title;
}

privateStringtitle;

privateList<Folder>children=newArrayList<Folder>();

publicvoidaddChild(Folderf){
children.add(f);
}

publicList<Folder>getChildren(){
returnchildren;
}

publicvoidsetChildren(List<Folder>children){
this.children=children;
}

publicStringgetTitle(){
returntitle;
}

publicvoidsetTitle(Stringtitle){
this.title=title;
}

publicStringtoString(StringlftStr,Stringappend){
StringBuilderb=newStringBuilder();
b.append(append+title);
b.append("\n");
if(children.size()>0){
for(inti=0;i<children.size()-1;i++){
b.append(lftStr+children.get(i).toString(lftStr+"│","├"));
}
b.append(lftStr+children.get(children.size()-1).toString(
lftStr+"","└"));

}
returnb.toString();

}

publicstaticvoidmain(String[]args){
Folderroot=newFolder("菜单列表");
Folderf1=newFolder("开始菜单");
root.addChild(f1);
Folderf1_1=newFolder("程序");
f1.addChild(f1_1);
Folderf1_1_1=newFolder("附件");
f1_1.addChild(f1_1_1);
Folderf1_1_1_1=newFolder("娱乐");
f1_1_1.addChild(f1_1_1_1);
Folderf1_1_1_2=newFolder("娱乐2");
f1_1_1.addChild(f1_1_1_2);
Folderf1_2=newFolder("辅助工具");
f1.addChild(f1_2);
Folderf2=newFolder("MyDocuments");
root.addChild(f2);
Folderf3=newFolder("MyDocuments2");
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