ztree学习之异步加载节点（一）

时间：2023-11-09 18:32:44

ztreedemo.jsp:

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>

<%

String path = request.getContextPath();

String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";

%>  

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">

<html>

  <head>

    <base href="<%=basePath%>">  

    <title>My JSP 'ztreedemo.jsp' starting page</title>  

    <meta http-equiv="pragma" content="no-cache">

    <meta http-equiv="cache-control" content="no-cache">

    <meta http-equiv="expires" content="0">

    <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">

    <meta http-equiv="description" content="This is my page">

    <link rel="stylesheet" href="<%=basePath%>/ztree/css/demo.css" type="text/css">

    <link rel="stylesheet" href="<%=basePath%>/ztree/css/zTreeStyle/zTreeStyle.css" type="text/css">

    <script type="text/javascript" src="<%=basePath%>/ztree/js/jquery-1.4.4.min.js"></script>

    <script type="text/javascript" src="<%=basePath%>/ztree/js/jquery.ztree.core-3.5.js"></script>

    <script type="text/javascript" src="<%=basePath%>/js/test/ztreedemo.js"></script>

  </head>  

  <body>

    <ul id="treeDemo" class="ztree"></ul>

  </body>

</html>

ztreedemo.js:

$(document).ready(function(){

    initMyZtree();

});  

var zNodes="";

var setting = {

    view: {

        selectedMulti: false,

        fontCss: setFontCss

    },

    async: {

        enable: true,

        url:"getZtreeData",

        autoParam:["id"]

    },

    callback: {

        beforeClick: beforeClickZtree

    }

};  

function initMyZtree(){

    $.ajax({

        type: "POST",

        dataType: "json",

        url: 'getZtreeData',

        success: function(data) {

            zNodes=data;

            $.fn.zTree.init($("#treeDemo"), setting, zNodes);

        }

    });    

}  

//单击事件

function beforeClickZtree(treeId, treeNode){

    alert(treeNode.id+","+treeNode.name);

}  

//设置字体

function setFontCss(treeId, treeNode) {

    if(treeNode.level==0){

        return {'font-weight':'bold','color':'red'};

    }else if(treeNode.level==1){

        return {'font-weight':'bold','color':'green'};

    }else if(treeNode.level==2){

        return {'font-weight':'bold','color':'blue'};

    }else{

        return {};

    }

};

CZTestAction.java:

package com.cz.action;  

import java.io.IOException;

import java.io.PrintWriter;

import java.sql.ResultSet;

import java.sql.SQLException;

import java.util.ArrayList;

import java.util.List;  

import javax.servlet.http.HttpServletResponse;  

import net.sf.json.JSONArray;  

import org.apache.struts2.ServletActionContext;  

import com.cz.model.TreeNode;

import com.cz.util.SqlHelper;

import com.opensymphony.xwork2.ActionSupport;  

public class CZTestAction extends ActionSupport{

    private String id;  

    public String getId() {

        return id;

    }  

    public void setId(String id) {

        this.id = id;

    }  

    /**

     * @author chenzheng

     * @since 2013-8-21

     * @Description: ztree测试

     * @throws

     * @return

     * String

     */

    public String getZtreeData(){

        System.out.println("*********"+id+"**********");

        if("null".equals(id)||"".equals(id)||id==null){

            id="0";

        }

        String sql="select t.jgid,t.jgmc,t.fjgid,t.jgbm,(select count(*) from sys_dept sd where sd.fjgid=t.jgid) as ispar from SYS_DEPT t where t.fjgid="+id;

        ResultSet rs=SqlHelper.executeQuery(sql, null);

        JSONArray jarray=new JSONArray();

        List<TreeNode> list=new ArrayList<TreeNode>();

        try {

            while(rs.next()){

                TreeNode tnode=new TreeNode();

                tnode.setId(rs.getString(1));

                tnode.setName(rs.getString(2));

                tnode.setpId(rs.getString(3));

                //判断当前节点是否还有子节点

                if(Integer.parseInt(rs.getString(5))>0){

                    tnode.setIsParent(true);

                    tnode.setHasChild(true);

                }else{

                    tnode.setIsParent(false);

                    tnode.setHasChild(false);

                }

                list.add(tnode);

            }

        } catch (SQLException e) {

            e.printStackTrace();

        }

        jarray.addAll(list);

        System.out.println(jarray.toString());

        HttpServletResponse response = ServletActionContext.getResponse();

        response.setCharacterEncoding("utf-8");

        PrintWriter pw = null;

        try {

            pw = response.getWriter();

            pw.write(jarray.toString());

        } catch (IOException e) {

            e.printStackTrace();

        }

        pw.flush();

        pw.close();

        return null;

    }

}

TreeNode.java:

package com.cz.model;  

public class TreeNode {  

    private String id;

    private String pId;

    private String name;

    private Boolean isParent;

    private Boolean hasChild;

    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 Boolean getIsParent() {

        return isParent;

    }

    public void setIsParent(Boolean isParent) {

        this.isParent = isParent;

    }

    public Boolean getHasChild() {

        return hasChild;

    }

    public void setHasChild(Boolean hasChild) {

        this.hasChild = hasChild;

    }

}

效果图:

ztree学习之异步加载节点（一）

本文转自：http://xiaoxiaomuyu.iteye.com/blog/1929490

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