Ext.tree.Panel实现单选，多选

Extjs

 var productCategoryTreeLookUpFn = function(callback) {
     var productCategoryLookUpWindow;
     var productCategoryTreeStore;
     var productCategoryTreeMenu;

     if (!productCategoryLookUpWindow) {

         // 加载菜单树
         productCategoryTreeStore = Ext.create('Ext.data.TreeStore', {
             fields : ['id', 'text'],
             proxy: {
                 type: 'ajax',
                 url: COMMON.APP_URL + '/view/master/selectProductCategoryForComboBoxTree.action'
             },
             root: {
                 id: '0',
                 text : "产品分类",
                 expanded: true
             }
         });

         var beforNode = null;
         productCategoryTreeMenu = Ext.create('Ext.tree.Panel', {
             store: productCategoryTreeStore,
             rootVisible : false,
             height : 300,
             animate : true, // 开启动画效果
             enableDD : false, // 不允许子节点拖动
             border : false, // 没有边框
             singleClickExpand : true,
             listeners : {
                 checkchange : function(node, checked, eOpts) {
 //                    setChildChecked(node, checked);
                     if(node.isNode){
                         if(beforNode != null){//把上一次选中节点取消选择,实现单选
                             beforNode.set("checked",false);
                         }
                         beforNode = node;
 //                        node.collapse();
 //                        node.cascadeBy(function(node) {
 //                            node.set("checked",checked);
 //                        });
                     }
                 }
             }
         });

         function setChildChecked(node, checked){
             node.set({checked:checked});
             if(node.hasChildNodes()){
                 node.eachChild(function(child) {
                     setChildChecked(child, checked);
                 });
             }
         }

         function setParentChecked(node, checked){
             node.set({checked:checked});
             var parentNode = node.parentNode;
             if(parentNode != null){
                 var flag = false;
                 parentNode.eachChild(function(child) {
                     if(child.data.checked == true){
                         flag = true;
                     }
                 });
                 if (checked == false) {
                     if(!flag){
                         setParentChecked(parentNode, checked);
                     }
                 } else {
                     if(flag){
                         setParentChecked(parentNode, checked);
                     }
                 }
              }
         }

         productCategoryLookUpWindow = Ext.create('Ext.window.Window', {
             title : '产品分类信息',
             autoShow: true,
             width : 400,
             constrain : true,
             constrainHeader : true,
             maximizable : false,
             minimizable : false,
             resizable : false,
             closable : false,
             buttonAlign : 'right',
             animateTarget: Ext.getBody(),
             modal : true,
             plain : true,
             border : true,
             closeAction : 'destroy',
             items : [productCategoryTreeMenu],
             buttons : [{
                 text : '确定',
                 handler : function() {
                     var checkNodeArray = productCategoryTreeMenu.getChecked();
                     var checkNodeString = '';
                     var checkNodeTextString = '';
                     for (var index = 0; index < checkNodeArray.length; index++) {
                         checkNodeString += checkNodeArray[0].data.id;
                         checkNodeTextString += checkNodeArray[0].data.qtip;
                     }
                     if (Ext.isFunction(callback)) {
                         callback(checkNodeString, checkNodeTextString);
                     }
                     productCategoryLookUpWindow.destroy();
                 }
             }, {
                 text : '关闭',
                 handler : function() {
                     productCategoryLookUpWindow.destroy();
                 }
             }]
         });

     }

     productCategoryLookUpWindow.show();

 };

Java

for (ProductCategoryVO dbVo : productCategoryVOList) {
                JSONObject obj = new JSONObject();
                obj.put("id", dbVo.getCategoryIdFull());
                obj.put("text", dbVo.getCategoryName());
                obj.put("qtip", dbVo.getCategoryNameFull());
                obj.put("leaf", !new Boolean(dbVo.getIsExistChildNode()));
                obj.put("checked", new Boolean(false));
//                obj.put("isExistChildNode", new Boolean(dbVo.getIsExistChildNode()));
//                obj.put("categoryId", dbVo.getCategoryId());
//                obj.put("categoryName", dbVo.getCategoryName());
//                obj.put("categoryIdFull", dbVo.getCategoryIdFull());
//                obj.put("categoryNameFull", dbVo.getCategoryNameFull());
//                obj.put("parentIdFull", dbVo.getParentIdFull());
//                obj.put("parentNameFull", dbVo.getParentNameFull());
//                obj.put("recordId", dbVo.getId());
//                obj.put("nodeLevel", dbVo.getNodeLevel());
                jsonArray.add(obj);
            }