通过代码修改，自定义加上

默认

  utils.each(tables, function (table) {
                        removeStyleSize(table, true);
                        domUtils.removeAttributes(table, ['style', 'border']);
                        utils.each(domUtils.getElementsByTagName(table, "td"), function (td) {
                            if (isEmptyBlock(td)) {
                                domUtils.fillNode(me.document, td);
                            }
                            removeStyleSize(td, true);
//                            domUtils.removeAttributes(td, ['style'])
                        });
                    });
					

改成

utils.each(tables, function (table) {                        
                        //粘贴进来的表格table定义属性
                        domUtils.setAttributes(table, {
                            style:'border-left:1px solid #666; border-top:1px solid #666;',
                        });                                            
                        
                        removeStyleSize(table, true);
                        //domUtils.removeAttributes(table, ['style', 'border']);
                        //domUtils.removeAttributes(table, ['style']);//no remove table Style
                        utils.each(domUtils.getElementsByTagName(table, "td"), function (td) {
                            
                            //粘贴进来的表格td定义属性
                            domUtils.setAttributes(td, {
                                style:'border-bottom:1px solid #666; border-right:1px solid #666; padding:2px;',
                            });                        
                        
                            if (isEmptyBlock(td)) {
                                domUtils.fillNode(me.document, td);
                            }
                            removeStyleSize(td, true);
                            //domUtils.removeAttributes(td, ['style'])
                        });
                    });

默认的也可以右击表格来修改