jquery zTree异步加载实例

web.xml中Servlet配置如下：

[html]

 1   <?xml version="1.0" encoding="UTF-8"?>
 2     <web-app version="2.4"
 3         xmlns="http://java.sun.com/xml/ns/j2ee"
 4         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 5         xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee
 6         http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
 7
 8
 9         <servlet>
10             <servlet-name>getDataServlet</servlet-name>;
11             <servlet-class>testTree.TestTree</servlet-class>;
12         </servlet>
13
14         <servlet-mapping>
15         <servlet-name>getDataServlet</servlet-name>;
16         <url-pattern>/getData</url-pattern>;
17         </servlet-mapping>
18
19     </web-app>  

JSP页面：

 1   <?xml version="1.0" encoding="UTF-8"?>
 2     <web-app version="2.4"
 3         xmlns="http://java.sun.com/xml/ns/j2ee"
 4         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 5         xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee
 6         http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
 7
 8
 9         <servlet>
10             <servlet-name>getDataServlet</servlet-name>;
11             <servlet-class>testTree.TestTree</servlet-class>;
12         </servlet>
13
14         <servlet-mapping>
15         <servlet-name>getDataServlet</servlet-name>;
16         <url-pattern>/getData</url-pattern>;
17         </servlet-mapping>
18
19     </web-app>  

Action代码：

 1 [java] view plain copy
 2
 3         public class TestTree extends HttpServlet {
 4
 5             @Override
 6             public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
 7         //      System.out.println("--------doGet--------");
 8                 this.doPost(request, response);
 9             }
10
11             @Override
12             public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
13         //      System.out.println("--------doPost--------");
14                 String id = request.getParameter("id");
15                 String name = request.getParameter("name");
16                 String level = request.getParameter("level");
17                 String otherParam = request.getParameter("otherParam");
18                 System.out.println(id + "|" + name + "|" + level + "|" + otherParam);
19
20                 JSONObject json = new JSONObject();
21                 List<HashMap<String,Object>> list = new ArrayList<HashMap<String,Object>>();
22
23                 for(int i = 0; i < 5; i++){
24                     HashMap<String,Object> hm = new HashMap<String,Object>();   //最外层，父节点
25                     hm.put("id", id + i);//id属性  ，数据传递
26                     hm.put("name", id + i); //name属性，显示节点名称
27                     hm.put("pId", id);
28
29                     list.add(hm);
30                 }
31
32                 JSONArray arr = new JSONArray(list);
33                 json.put("success", true);
34                 json.put("arr", arr);
35
36                 System.out.println("--------json------" + json.toString());
37                 response.getWriter().write(arr.toString());
38         //      response.getWriter().write(json.toString());
39         //      response.getWriter().write("[{pId:‘2‘,name:‘20‘,id:‘20‘}]");
40             }
41
42         }