Ext-下拉樹效果圖：使用方式：1、 前臺(tái)：xtype:mycomboxtree,url:Dep.queryDep.do,fieldLabel : 報(bào)銷單位,treeRootText:所有單位,/根節(jié)點(diǎn)名稱/rootVisible:false,/是否顯示根節(jié)點(diǎn)allowUnLeafClick:false/false表示不允許非子葉點(diǎn)擊選中。2、 action：String fatherId = request.getParameter(id);List list = this.depService.queryDep(Integer.parseInt(fatherId);String s = ;for (Dep d : list) s = s+text:+d.getName()+,id:+d.getId()+;if(!this.depService.checkHasChild(d.getId()s = s + ,leaf:+true+,;elses = s + ,;s = s.substring(0,s.length()-1)+;response.getWriter().write(s);3、 組件原件ComboboxTree = Ext.extend(Ext.form.ComboBox, id:,/選填url:,/必填fieldLabel : 下拉樹,/選填 name:, treeRootText:所有, rootVisible:true,/是否顯示根節(jié)點(diǎn) allowUnLeafClick:false,/false表示不允許非子葉點(diǎn)擊選中。 /*以上為必填或者選填項(xiàng)*/ store:new Ext.data.SimpleStore(fields:,data:), editable:false, autoScroll : false, mode: local, triggerAction:all, emptyText : 請(qǐng)選擇., width:150, tpl: , selectedClass:, onSelect:Ext.emptyFn, initComponent : function() ComboboxTree.superclass.initComponent.call(this); /* * the root of opTree; */ this.opRoot = new Ext.tree.AsyncTreeNode( id:0,text:this.treeRootText); /* * 與后臺(tái)通訊的加載器 */this.loader = new Ext.tree.TreeLoader( url:this.url,listeners: beforeload:function(treeloader,node) treeloader.baseParams= id:node.id ; ); /* * the opTree used to choose the dep; */this.tree = new Ext.tree.TreePanel( anchor : 95%, frame : false, width:this.width-5, height:150, animate : false, rootVisible : this.rootVisible, autoScroll : true, loader : this.loader, root : this.opRoot ); boHidden = new Ext.form.Hidden( id:comboHidden, name:hidden, value: ) , /* * - * 樹的單擊事件處理 * param node,event * - */ treeClk : function(node, e) if (!node.isLeaf() & !this.allowUnLeafClick) e.stopEvent();/ 非葉子節(jié)點(diǎn)則不觸發(fā) return; if(node.id=0) return; this.setValue(node.text);/ 設(shè)置option值 boHidden.setValue(node.id);/設(shè)置隱藏域值 this.collapse();/ 隱藏option列表 , reset : function() this.setValue();/ 重置 boHidden.setValue();/重置隱藏域值 , /自定義方法，去的隱藏域值 getHidden : function() return boHidden.getValue(); , listeners : expand : fn : function() if (!this.tree.rendered & this.tpl) this.tree.render(tree); this.tree.show(); , single :