jquery_treeview 怎么没有虚线连接起来

<%@include file="/WEB-INF/jsp/public/header.jsp"%>

$("#tree").treeview();

          <ul id="tree" class="treeview">

根目录/s:a

• 
  
  ${name}/s:a
  
  
  
  
  • 
    
    ${name}/s:a
    
    
    
    
    • 
      
      ${name}/s:a
      
      
      
      
      • 
        
        ${name}/s:a
        
      
      
      
      /s:iterator
      
    
    
    
    /s:iterator
    
  
  
  
  /s:iterator
  

/s:iterator

https://download.csdn.net/download/xdongll/2975665