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extjs学习笔记三[Ext+json+jsp构建的动态树]

 
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树节点组合模型
package cn.com.jsnh.model.catalog;

public class TreeModel {
private String node;
private CatalogModel model;

public String getNode() {
return node;
}

public void setNode(String node) {
this.node = node;
}

public CatalogModel getModel() {
return model;
}

public void setModel(CatalogModel model) {
this.model = model;
}

}

栏目模型【实际的树节点】
package cn.com.jsnh.model.catalog;

public class CatalogModel {
private String id;
private String text;
private Boolean leaf;
private String cls;
private String action;
private String model;

public String getId() {
return id;
}

public void setId(String id) {
this.id = id;
}

public String getText() {
return text;
}

public void setText(String text) {
this.text = text;
}

public Boolean getLeaf() {
return leaf;
}

public void setLeaf(Boolean leaf) {
this.leaf = leaf;
}

public String getCls() {
return cls;
}

public void setCls(String cls) {
this.cls = cls;
}

public String getAction() {
return action;
}

public void setAction(String action) {
this.action = action;
}

public String getModel() {
return model;
}

public void setModel(String model) {
this.model = model;
}

}

<%@ page import="java.util.*,
cn.com.jsnh.model.catalog.TreeModel,
cn.com.jsnh.model.catalog.CatalogModel,
net.sf.json.JSONObject,
net.sf.json.JSONArray,
net.sf.ezmorph.bean.MorphDynaBean"
contentType="text/html;charset=utf-8"%>
<%
try{
String node = request.getParameter("node");
System.out.println("node="+node);

List<TreeModel> tree = new ArrayList<TreeModel>();
TreeModel treeModel = new TreeModel();

CatalogModel catalogModel = new CatalogModel();
catalogModel.setId("100000");
catalogModel.setText("个人管理专区");
catalogModel.setLeaf(Boolean.FALSE);
catalogModel.setCls("folder");
catalogModel.setAction("100000");
catalogModel.setModel("100000");
treeModel.setNode("root");
treeModel.setModel(catalogModel);
tree.add(treeModel);

treeModel = new TreeModel();
catalogModel = new CatalogModel();
catalogModel.setId("100001");
catalogModel.setText("修改我的资");
catalogModel.setLeaf(Boolean.TRUE);
catalogModel.setCls("file");
catalogModel.setAction("x.action");
catalogModel.setModel("user");
treeModel.setNode("100000");
treeModel.setModel(catalogModel);
tree.add(treeModel);

treeModel = new TreeModel();
catalogModel = new CatalogModel();
catalogModel.setId("100002");
catalogModel.setText("个人消息");
catalogModel.setLeaf(Boolean.TRUE);
catalogModel.setCls("file");
catalogModel.setAction("x.action");
catalogModel.setModel("message");
treeModel.setNode("100000");
treeModel.setModel(catalogModel);
tree.add(treeModel);

List<CatalogModel> catalogList = new ArrayList<CatalogModel>();
for(TreeModel o:tree){
if(o.getNode().equals(node)){
catalogList.add(o.getModel());
}
}

JSONArray json = JSONArray.fromObject(catalogList);

response.getWriter().write(json.toString());

} catch(Exception ex) {
}
%>

<html xmlns="http://www.w3.org/1999/xhtml">
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
    <title>后台框架演示</title>
    <link rel="stylesheet" type="text/css" href="../extjs/resources/css/ext-all.css"/>
    <link rel="stylesheet" type="text/css" href="css/common.css"/>
    <script type="text/javascript" src="../extjs/adapter/ext/ext-base.js"></script>
    <script type="text/javascript" src="../extjs/ext-all.js"></script>

    <script type="text/javascript" src="../extjs/ext-lang-zh_CN.js"></script>
    <script type="text/javascript" src="script/common.js"></script>
    <script type="text/javascript" src="script/json/json.js"></script>
    <script type="text/javascript" src="script/json/json2.js"></script>

</head>

<body>
<script type="text/javascript">
var Tree = Ext.tree;
var root = new Tree.AsyncTreeNode({
text: 'Ext JS',
draggable:false,
id:'root',
children:[{//子节点
    text:'loading',//显示文字为loading
    iconCls: 'loading',//使用图标为loading 在index.html style 中定义
    leaf:true//是叶子节点,不再包含子节点
  }]

});

var treeLoader=new Ext.tree.TreeLoader();//指定一个空的TreeLoader

var tree = new Ext.tree.TreePanel({
contentEl:'west',
border:true,
root:root,
region:'west',
id:'west-panel',
split:true,
width: 200,
minSize: 175,
maxSize: 400,
margins:'0 0 0 0',
layout:'accordion',
title:'功能菜单',
collapsible :true,
layoutConfig:{
animate:true
},
rootVisible:true,
autoScroll:true,
loader:treeLoader
});
tree.on('click',treeClick);
//tree.expandAll();
var tab = new Ext.TabPanel({
region:'center',
deferredRender:false,
activeTab:0,
items:[{
contentEl:'center2',
title: '首页',
autoScroll:true
}]
});
function treeClick(node,e) {
if(node.isLeaf()){
e.stopEvent();
var n = tab.getComponent(node.id);
if (!n) {
var n = tab.add({
'id' : node.id,
'title' : node.text,
closable:true,
html : '<iframe scrolling="auto" frameborder="0" width="100%" height="100%" src="index.php?model='+node.attributes.model+'&action='+node.attributes.action+'"></iframe>'
});
}
tab.setActiveTab(n);
}
}
function newTab(id,text,url) {
  var n = tab.getComponent(id);
if (!n) {
var n = tab.add({
'id' : id,
'title' : text,
closable:true,
html : '<iframe scrolling="auto" frameborder="0" width="100%" height="100%" src="'+url+'"></iframe>'
});
}
tab.setActiveTab(n);
}

function gettree(node){
  if(node.firstChild.text=='loading'){
   var par = node.id;
   //alert('par='+par);
   Ext.Ajax.request({
    url: 'jsonTree.jsp',
    params: {node:par},
    method: 'GET',
    success: function(v){  //成功返回
     var myData = JSON.parse(v.responseText); // 得到服务器返回的json串，并用json.js解析过对象数组
            for(var i=0;i<myData.length;i++ ){
            var cnode=new Ext.tree.AsyncTreeNode({
       id:myData<i>.id,//id 为服务器返回id 父节点id
       text:myData<i>.text,//显示内容为服务器返回id 父节点id
       leaf:myData<i>.leaf,//是否为叶子节点,根据服务器返回内容决定是否为叶子节点
       children:[{//添加子节点,如果服务器返回tl<i>.leaf为ture则孩子节点将无法显示
        text:'loading',
        iconCls: 'loading',
        leaf:true
       }]
            });
            cnode.on('expand',gettree);//定义当前节点展开时调用gettree方法,再次异步读取子节点
       node.appendChild(cnode);//将当前节点添加为待展开节点子节点
           }
           node.firstChild.remove();//删除当前节点第一个孩子节点(loading节点)
    },
    failure: function2  // 失败
   });
  }
}

function function2(){
  alert("failure");
}


Ext.onReady(function(){
   var viewport = new Ext.Viewport({
layout:'border',
items:[
new Ext.BoxComponent({
region:'north',
el: 'north',
height:35
}),
tree,
tab
]
});

tree.render();
root.on('expand',gettree);//当根节点展开后触发gettree事件
//root.expand();
loadend();
});

function openWindow(id,title,url,width,height){
var win = Ext.get(id)
if (win) {
win.show();
return;
}
win = new Ext.Window({
id:id,
title:title,
layout:'fit',
width:width,
height:height,
closeAction:'close',
collapsible:true,
plain: true,
html : '<iframe frameborder="0" width="100%" height="100%" src="'+url+'"></iframe>'
});
win.show();
}
</script>
<div id="north">
    <p class="api-title">MYOIS 1.0 Office Information System</p>
</div>

<div id="west">
</div>
<div id="center2">center2</div>
<div id="loading-mask" style=""></div>
<div id="loading">
    <div class="loading-indicator"><img src="images/loading.gif" width="32"
                                        height="32" style="margin-right:8px;" align="absmiddle"/>Loading...
    </div>
</div>
</body>

</html>

 

 

Link:http://www.zhuoda.org/lunzi/102821.html

 

 

 

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