javascript - 这个jsp页面没有导入jquery,为什么可以用jquery的函数?

<%@ page language="java"
    import="java.util.*,com.qdzq.iacp.entity.*,com.qdzq.zzpt.vo.*"
    pageEncoding="UTF-8"%>
<%
    String path = request.getContextPath();
    String basePath = request.getScheme() + "://"
            + request.getServerName() + ":" + request.getServerPort()
            + path + "/";
    //Page p = (Page) request.getAttribute("page");
    List  trees = (List)request.getAttribute("deviceList");
   
%>

    

        

    
            
中国设备
                    

                        
A组
                            

                                <%     for(Iacp_device device:trees){         
                                %>
                                
                                

                                    <%=device.getDevice_name() %>(<%=device.getDevice_code() %>)
                                    
                                
                               <%     
                               
                                }
                                %>
                            
                        
                        
B组
                            
                        
                        
                    
            
                
            
美国设备
                

                    
A组
                        
                    
                    
B组
                        
                    
                        
                
            
            
            
        
    

    
    

        

            
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