dom4j生成xml

该项目采用dom4j从数据库表中生成xml数据 项目文档、数据库建表语句均已放置在项目中。 关键代码如下： public String getXml(Connection conn, int rm_id, String path) { //声明xml字符串 String fileString = ""; //创建DAO对象 MachineroomDao machineroom_dao = new MachineroomDao(); Cab_equipmentDao cab_equipment_dao = new Cab_equipmentDao(); Equip_configDao equip_config_dao = new Equip_configDao(); EquipmentDao equipment_dao = new EquipmentDao(); //添加room，第一层 Machineroom machineroom_dto = machineroom_dao.findById(conn, rm_id);//设置房间号 //获取个属性的值.如果为null,将属性设为"" String getMr_id = new Integer(machineroom_dto.getMr_id()).toString(); String getMr_name = machineroom_dto.getMr_name(); if(getMr_id == null) getMr_id = ""; if(getMr_name == null) getMr_name = ""; Document document = DocumentHelper.createDocument(); Element rooms_racks = document.addElement("rooms-racks"); Element room = rooms_racks.addElement("room"); room.addAttribute("id", getMr_id); room.addAttribute("name", getMr_name); room.addAttribute("isSelected", "true"); //添加rack，第二层 List<Cab_equipment> cab_equipment_list = cab_equipment_dao.findById(conn, path, machineroom_dto.getMr_id()); for (int i = 0; i < cab_equipment_list.size(); i++) { Cab_equipment cab_equipment_dto = cab_equipment_list.get(i); //获取个属性的值.如果为null,将属性设为"" String getE_id = cab_equipment_dto.getE_id(); String getEqucab_name = cab_equipment_dto.getEqucab_name(); String getX = cab_equipment_dto.getX() + ""; String getY = cab_equipment_dto.getY() + ""; String getZ = cab_equipment_dto.getZ() + ""; String getLongs = cab_equipment_dto.getLongs() + ""; String getWidth = cab_equipment_dto.getWidth() + ""; String getHighs = cab_equipment_dto.getHighs() + ""; String getRotate_angle = cab_equipment_dto.getRotate_angle(); if(getE_id == null) getE_id = ""; if(getEqucab_name == null) getEqucab_name = ""; if(getRotate_angle == null) getRotate_angle = ""; //将float后的".0"去掉 if(cab_equipment_dto.getX()%1 == 0) getX = (int)cab_equipment_dto.getX()+""; if(cab_equipment_dto.getY()%1 == 0) getY = (int)cab_equipment_dto.getY()+""; if(cab_equipment_dto.getZ()%1 == 0) getZ = (int)cab_equipment_dto.getZ()+""; if(cab_equipment_dto.getHighs()%1 == 0) getHighs = (int)cab_equipment_dto.getHighs()+""; Element rack = room.addElement("rack"); rack.addAttribute("id", getE_id); rack.addAttribute("name", getEqucab_name); rack.addAttribute("x", getX); rack.addAttribute("y", getY); rack.addAttribute("z", getZ); rack.addAttribute("lengthX", getLongs); rack.addAttribute("lengthY", getWidth); rack.addAttribute("lengthZ", getHighs); rack.addAttribute("rotation", getRotate_angle); //添加device，第三层 int u = 0;//表示需要计算的u高，其xml的属性为uplace int count = 0;//计数器,临时变量 int count2 = 0; List<Equip_config> equip_config_list = equip_config_dao.findByLocation(conn, cab_equipment_dto.getE_id()); for (int j = 0; j < equip_config_list.size(); j++) { Equip_config equip_config_dto = equip_config_list.get(j); Equipment equipment_dto = equipment_dao.findBySerial(conn, equip_config_dto.getSerial()); //获取个属性的值.如果为null,将属性设为"" String getSerial = equip_config_dto.getSerial(); String getEquipmentname = equip_config_dto.getEquipmentname(); String getEq_typecn = equipment_dto.getEq_typecn(); String getImagepath = equip_config_dto.getImagepath(); String getStorey = equip_config_dto.getStorey(); //String getU = equip_config_dto.getU() + ""; if(getSerial == null) getSerial = ""; if(getEquipmentname == null) getEquipmentname = ""; if(getEq_typecn == null) getEq_typecn = ""; if(getImagepath == null) getImagepath = ""; if(getStorey == null) getStorey = ""; int getU = equip_config_dto.getU(); //处理u高 if(getU != 0){ count++; } if(count2==0){ if(count == 1){ u = 2; } }else{ Equip_config equip_config_dto_temp = equip_config_list.get(count2 - 1); Equipment equipment_dto_temp = equipment_dao.findBySerial(conn, equip_config_dto_temp.getSerial()); int getU_temp = equip_config_dto_temp.getU(); if(count == 1){ u = 2; }else { if(getU_temp == 0){ u = u + getU_temp/10 + 0; } else { if(getU_temp == 0){ u = u + getU_temp/10 +2; }else { u = u + getU_temp/10 + 1 + 2; } } } } count2++; String uplace = u + ""; String GetU = getU + ""; if(getU == 0) { uplace = "0"; }//u高处理完毕 Element device = rack.addElement("device"); device.addAttribute("num", getSerial); device.addAttribute("name", getEquipmentname); device.addAttribute("type", getEq_typecn); device.addAttribute("image", getImagepath); //device.addAttribute("storey", getStorey);//设备所在的层数，该属性不在xml中展示 device.addAttribute("uplace", uplace);//计算得来的u高 device.addAttribute("uheight", GetU);//图片的高度 } } //设置xml输出格式 OutputFormat format = OutputFormat.createPrettyPrint(); format.setEncoding("UTF-8"); StringWriter out = new StringWriter(); XMLWriter xmlWriter = new XMLWriter(out, format); try { xmlWriter.write(document); fileString = out.toString(); xmlWriter.close(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } return fileString; }