jquery ztree implements drop-down tree box using json data_jquery

<% @ page language="java" pageEncoding="UTF-8"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"% >
<%@ taglib uri="http://java.sun.com/jsp/jstl/functions" prefix="fn"%>

• Select When selecting a city, press the Ctrl or Cmd key to perform multiple selections


• City:
  Select

public class EquipTypeJson {
private String id;
private String pId;
private String name;

public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public String getPId() {
return pId;
}
public void setPId(String pId) {
this.pId = pId;
}
public String getName() {
return name;
}
public void setName(String name) {
this .name = name;
}


}

public ModelAndView List(HttpServletRequest request, HttpServletResponse response,Product prod) throws Exception {
Map map=new HashMap();
List< EquipTypeJson> list = testService.getAllEquipType();//Get source data from the database
JSONArray jsonArray = JSONArray.fromObject(list); //Convert list data to json object
String json = jsonArray.toString() ; //Convert json object to string
map.put("jsonList", json);
return new ModelAndView("equip/List").addAllObjects(map);
}