ExtJS06：树型Tree相关操作

1.树形代码如下：

this.treepanel = new Ext.tree.TreePanel({

title : '指标参数分类',

region : 'west',

collapsible : true,

autoScroll : true,

split : true,

height : 800,

width : 180,

id : 'Unim_AssTarPar_Tree_Id',

tbar : new Ext.Toolbar({

items : [{

xtype : 'button',

iconCls : 'btn-refresh',

text : '刷新',

handler : function() {

var tree = Ext.getCmp('Unim_AssTarPar_Tree_Id');

tree.body.mask(__maskLoading, 'x-mask-loading');

tree.root.reload();

tree.root.collapse(true, false);

tree.root.expand(false, false, function() {

tree.body.unmask();// 全部展开之后让蒙版消失

});

}

}, {

xtype : 'button',

text : '展开',

iconCls : 'btn-expand',

handler : function() {

var tree = Ext.getCmp('Unim_AssTarPar_Tree_Id');

tree.expandAll();

}

}, {

xtype : 'button',

text : '收起',

iconCls : 'btn-collapse',

handler : function() {

var tree = Ext.getCmp('Unim_AssTarPar_Tree_Id');

tree.collapseAll();

}

}]

}),

autoScroll : true,

animate : true,

// checkModel : 'multiple',

containerScroll : true,

lines : true,// 节点之间连接的横竖线

rootVisible : false,// 是否显示根节点

collapsible : true,

split : true,

// cascadeCheck : 'all',

border : false,

frame : false,

loader : new Ext.tree.TreeLoader({

url : __ctxPath + '/unim/listTreeUnimAssTarPar.do'

}),

root : new Ext.tree.AsyncTreeNode({

}),

listeners : {

scope:this,

'click' : this.clickNode                                            //监听单击事件

}

});

2.单击事件代码如下：

clickNode:function(node) {

var users = Ext.getCmp('AssetCanShuViewGrid');            //左侧表格

var store = users.getStore();                                                //获取store对象

store.url = __ctxPath + "/unim/listUnimAssTarPar.do";    //指定url

var nodeId = node.id;

store.baseParams = {                                                             //给store指定基本参数

'treeParam' : nodeId

};

store.reload({                                                                        //重新加载表格，并传递分页参数

params : {

start : 0,

limit : store.baseParams.limit

}

});

},

3.后台代码，拼接树形所需要的串

public String listTree() {

QueryFilter filter=new QueryFilter(getRequest());

//     filter.addSorted("orderno", QueryFilter.ORDER_ASC);

List<UnimAssets> list= unimAssetsService.getAll(filter);//获得数据集

StringBuilder sb = new StringBuilder();

sb.append("[{id:'0',text:'指标参数分类树',expanded:true,children:[");    //指定根节点

int iCount = list.size();

for(int i=0;i<iCount;i++) {

sb.append("{id:'asId"+list.get(i).getAssetsId()+"',text:'"+list.get(i).getAssetsName()+"',"+findChild(list.get(i).getAssetsId()));

if(i<iCount-1) {

sb.append(",");

}

}

sb.append("]}]");                                                                                        //指定根节点

jsonString=sb.toString();

System.out.println(jsonString);

return SUCCESS;

}

/*

 * 寻找子根节点

 */

public String findChild(Long assetsId) {

StringBuffer buff1 = new StringBuffer("");

List<UnimAssetsTarget> list = unimAssetsTargetService.findByParentId(assetsId);

if (list.size() == 0) {

buff1.append("leaf:true}");

return buff1.toString();

} else {

buff1.append("children:[");

for (UnimAssetsTarget target : list) {

buff1.append("{id:'trId" + target.getTargetId() + "',text:'" + target.getTargetName() + "',");

buff1.append("leaf:true},");

//                         buff1.append(findChild(target.getTargetId()));            //如果树形超过两级，则递归

}

buff1.deleteCharAt(buff1.length() - 1);

buff1.append("]}");

return buff1.toString();

}

}