基于jquery+ztree+java获取json数据构建树实例

zTree 是利用 JQuery 的核心代码，实现一套能完成大部分常用功能的 Tree 插件

兼容 IE、FireFox、Chrome 等浏览器
在一个页面内可同时生成多个 Tree 实例
支持 JSON 数据
支持一次性静态生成 和 Ajax 异步加载 两种方式
支持多种事件响应及反馈
支持 Tree 的节点移动、编辑、删除
支持任意更换皮肤 / 个性化图标（依靠css）
支持极其灵活的 checkbox 或 radio 选择功能
简单的参数配置实现 灵活多变的功能
因为ztree的格式支持Json，所以我们就新建了一个Node类【TreeNode.java】

/**
 * TreeNode.java
 * 版权所有(C) 2012
 * 创建:cuiran 2012-06-12 15:37:40
 */
package com.fastjson.test;

/**
 * TODO
 * @author cuiran
 * @version TODO
 */
public class TreeNode {
 private Integer id;
 private Integer pId;
 private String name;
 private Boolean checked;
 private Boolean open;
 /**
  * @return the id
  */
 public Integer getId() {
  return id;
 }
 /**
  * @param id the id to set
  */
 public void setId(Integer id) {
  this.id = id;
 }
 /**
  * @return the pId
  */
 public Integer getPId() {
  return pId;
 }
 /**
  * @param id the pId to set
  */
 public void setPId(Integer id) {
  pId = id;
 }
 /**
  * @return the name
  */
 public String getName() {
  return name;
 }
 /**
  * @param name the name to set
  */
 public void setName(String name) {
  this.name = name;
 }
 /**
  * @return the checked
  */
 public Boolean isChecked() {
  return checked;
 }
 /**
  * @param checked the checked to set
  */
 public void setChecked(Boolean checked) {
  this.checked = checked;
 }
 /**
  * @return the open
  */
 public Boolean isOpen() {
  return open;
 }
 /**
  * @param open the open to set
  */
 public void setOpen(Boolean open) {
  this.open = open;
 }
 public TreeNode(Integer id, Integer pId, String name, Boolean checked, Boolean open) {
  super();
  this.id = id;
  this.pId = pId;
  this.name = name;
  this.checked = checked;
  this.open = open;
 }
 public TreeNode() {
  super();
 }
 

}
新建一个TreeServlet【TreeServlet.java】

package com.fastjson.test;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.List;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import com.alibaba.fastjson.JSON;

public class TreeServlet extends HttpServlet {

 /**
  * Constructor of the object.
  */
 public TreeServlet() {
  super();
 }

 /**
  * Destruction of the servlet.

  */
 public void destroy() {
  super.destroy(); // Just puts "destroy" string in log
  // Put your code here
 }

 /**
  * The doGet method of the servlet.

  *
  * This method is called when a form has its tag value method equals to get.
  *
  * @param request the request send by the client to the server
  * @param response the response send by the server to the client
  * @throws ServletException if an error occurred
  * @throws IOException if an error occurred
  */
 public void doGet(HttpServletRequest request, HttpServletResponse response)
   throws ServletException, IOException {

  this.doPost(request, response);
 }

 /**
  * The doPost method of the servlet.

  *
  * This method is called when a form has its tag value method equals to post.
  *
  * @param request the request send by the client to the server
  * @param response the response send by the server to the client
  * @throws ServletException if an error occurred
  * @throws IOException if an error occurred
  */
 public void doPost(HttpServletRequest request, HttpServletResponse response)
   throws ServletException, IOException {
  response.setContentType("text/html");
  response.setCharacterEncoding("utf-8");
  
  PrintWriter out = response.getWriter();
  
  TreeNode node1=new TreeNode(1,0,"北京市",false,true);
  TreeNode node2=new TreeNode(2,1,"朝阳区",false,true);
  TreeNode node3=new TreeNode(3,1,"海淀区",false,true);
  
  TreeNode node4=new TreeNode(4,0,"湖北省",false,true);
  TreeNode node5=new TreeNode(5,4,"武汉市",false,true);
  TreeNode node6=new TreeNode(6,4,"襄阳市",false,true);
  
  List list=new ArrayList();
  list.add(node1);
  list.add(node2);
  list.add(node3);
  list.add(node4);
  list.add(node5);
  list.add(node6);
  
  String jsonString = JSON.toJSONString(list);
  System.out.println("调用后台:"+jsonString);
  out.println(jsonString);
  out.flush();
  out.close();
 }

 /**
  * Initialization of the servlet.

  *
  * @throws ServletException if an error occurs
  */
 public void init() throws ServletException {
  // Put your code here
 }

}

网页代码【tree.jsp】

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>

 
   
   
   
   
 
 
    
 
 
 
 
 
 
 
 
 
 
 
 
 
 
    This is my JSP page.