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jquery zTree异步加载的例子

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09/17
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下面是使用zTree异步加载的一个例子：

1）初始化树的时候是ajax请求，返回nodes列表来初始化树的；如果一开始就异步的话，$.fn.zTree.init($("#zTree"),setting, data)第三个参数为null就行；

2）后面点击最末端的节点，比如点击单板的时候，开始异步加载；

我准备的nodes的数据结构：一会返回的node就是这样的格式，不过全部是string类型；

var nodes =
[
{
'id': 1,
'pid': 0,
'name': '硬件规格',
'open':false
},
{
'id': 10,
'pid': 1,
'name': '单板',
'open':false
},
//比如点击单板+，要异步加载的两个节点，模拟用
{
'id': 100,
'pid': 10,
'name': '单板_00',
'open':false
},
{
'id': 101,
'pid': 10,
'name': '单板_01',
'open':false
}, {
'id': 11,
'pid': 1,
'name': '子卡',
'open':false
},
{
'id': 12,
'pid': 1,
'name': '设备',
'open':false
},
{
'id': 2,
'pid': 0,
'name': '软件规格',
'open':false
},
{
'id': 20,
'pid': 2,
'name': 'java',
'open':false
},
{
'id': 21,
'pid': 2,
'name': 'jscript',
'open':false
},
{
'id': 22,
'pid': 2,
'name': 'php',
'open':false
}
]

index.jsp:

<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<link rel="stylesheet" href="resources/zTreeStyle/zTreeStyle.css" type="text/css">
<link rel="stylesheet" type="text/css" href="resources/bootstrap/bootstrap.min.css">
<title>index</title>
</head>
<body>
<h4>Ztree异步加载使用例子</h4>
<ul id="zTree" class="ztree"></ul>
</body>
<script src="resources/js/jquery.min.js"></script>
<script type="text/javascript" src="resources/js/jquery.ztree.all.min.js"></script>
<script type="text/javascript">
var setting = {
async: {
enable: true,
url:"asyncGetNodes",
autoParam:["id", "pid", "name"],
dataFilter: filter
},
data:{
simpleData:{
enable: true,
idKey:'id',
pIdKey:'pid',
rootPId: 0
}
},
view:{
showIcon: false
}
};
$(document).ready(function(){
initZTree();
});function filter(treeId, parentNode, childNodes) {
return childNodes;
}
//初始化树
function initZTree(){
$.ajax({
url:"getNodes",
type:"post",
dataType: "json",
success: function(data){
console.log(data);
var zTreeObj = $.fn.zTree.init($("#zTree"),setting, data);
//让第一个父节点展开
var rootNode_0 = zTreeObj.getNodeByParam('pid',0,null);
zTreeObj.expandNode(rootNode_0, true, false, false, false);
},
error: function(){ }
});
}</script>
</html>

实体Node.java:

package com.test.model;public class Node {
private String id;
private String pid;
private String name;
private String open;
private String isParent; public Node(String id, String pid, String name, String open, String isParent) {
super();
this.id = id;
this.pid = pid;
this.name = name;
this.open = open;
this.isParent = isParent;
}
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 String getOpen() {
return open;
}
public void setOpen(String open) {
this.open = open;
}
public String getIsParent() {
return isParent;
}
public void setIsParent(String isParent) {
this.isParent = isParent;
}}

Controller:

package com.cy.controller;import java.util.ArrayList;
import java.util.List;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import com.alibaba.fastjson.JSON;
import com.test.model.Node;@Controller
public class ZtreeController { @RequestMapping("/getNodes")
@ResponseBody
public List<Node> getNodes() throws Exception{
List<Node> nodeList = new ArrayList<Node>();
nodeList.add(new Node("1","0","硬件规格","false","true"));
nodeList.add(new Node("10","1","单板","false","true"));
nodeList.add(new Node("11","1","子卡","false","true"));
nodeList.add(new Node("12","1","设备","false","true"));
nodeList.add(new Node("2","0","软件规格","false","true"));
nodeList.add(new Node("20","2","java","false","true"));
nodeList.add(new Node("21","2","jscript","false","true"));
nodeList.add(new Node("22","2","php","false","true"));
return nodeList;
} @RequestMapping("/asyncGetNodes")
@ResponseBody
public List<Node> asyncGetNodes(String id, String pid, String name) throws Exception{
List<Node> nodeList = new ArrayList<Node>();
if(id.equals("10")){
nodeList.add(new Node("100",id,"单板_00","false","false"));
nodeList.add(new Node("101",id,"单板_01","false","false"));
}
Thread.sleep(3000);
return nodeList;
}
}

Thread.sleep(3000);是模拟异步加载的时间；

效果：
一开始初始化完tree时候，让第一个父节点展开了；

异步加载过程中....

异步加载完成：

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