使用Dom4j生成与解析XML

博客指出Dom4j是操作XML生成与解析的最佳方式,并表示将直接放出相关代码。

摘要生成于 C知道 ,由 DeepSeek-R1 满血版支持, 前往体验 >

Dom4j 综合考虑来说是最佳操作XML的生成与解析的方式
下面直接放代码:

package xmlparse;

import org.dom4j.*;
import org.dom4j.io.OutputFormat;
import org.dom4j.io.SAXReader;
import org.dom4j.io.XMLWriter;

import java.io.*;
import java.util.Iterator;
import java.util.List;

/**
 * Created by Administrator on 2019/6/17 0017 下午 11:01
 */
public class Dom4jTest {
    /**
     * Dom4j 生成XML
     *
     */
    public void CreateXml(){
        //1.创建document对象
        Document document = DocumentHelper.createDocument();
        //2创建根节点bookstore
        Element bookstore = document.addElement("bookstore");

        //3.创建根节点下子节点book
        Element book = bookstore.addElement("book");
        //4创建根节点属性
        book.addAttribute("id", "1");
        //5.创建book下子节点name.athor等子节点
        Element name = book.addElement("name");
        //6.设置name的文本值
        name.setText("小王子");
        Element author = book.addElement("author");
        author.setText("安东尼");
        Element price = book.addElement("price");
        price.setText("68");
        Element language = book.addElement("Language");
        language.setText("Chinese");
        Element description = book.addElement("description");
        description.setText("<这是一本我没看过的书>");
        //7创建输出格式对象Format,用于格式化xml
        OutputFormat format = OutputFormat.createPrettyPrint();
        //8使用OutputFormat格式化编码
        format.setEncoding("GBK");

        //7.将document转换成xml
        try {
            XMLWriter xmlWriter = new XMLWriter(new FileOutputStream("src/res/cwbook.xml"),format);
            //设置特殊字符不用转义
//            xmlWriter.setEscapeText(false);
            xmlWriter.write(document);
            xmlWriter.close();
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }

    }
    /**
     * Dom4j解析XML
     */
    public void XMLParse(){
        //1 首先创建SAXReader 解析器
        SAXReader saxReader = new SAXReader();
        try {
            //2.加载需要解析的文件
            Document read = saxReader.read(new File("src/res/cwbook.xml"));
            //3获取根节点
            Element bookstore = read.getRootElement();
            //4根据根节点获取其下的所有子节点
            Iterator<Element> bookstores = bookstore.elementIterator();
            int index=1;
            //5.遍历节点
            while(bookstores.hasNext()){
                System.out.println("开始解析第"+index+"本书");
                //6拿到其中一个节点
                Element books = bookstores.next();
                //7 获取其中一个节点的所有属性
                List<Attribute> attributeList = books.attributes();
                //8遍历属性节点
                for (Attribute arrt:attributeList) {
                    //9 输出每个属性节点的属性名称和属性值
                    String arrtName = arrt.getName();
                    String arrtValue = arrt.getValue();
                    System.out.println("第"+index+"本书的属性名是:"+arrtName+",属性值是:"+arrtValue);
                }
                //10获取其中一个节点下的子节点
                Iterator<Element> book = books.elementIterator();
                //11遍历子节点
                while(book.hasNext()){
                    //12 拿到其中一个子节点并输出节点名称和节点值
                    Element bookchild = book.next();
                    System.out.println("节点名是:"+bookchild.getName()+",节点值是:"+bookchild.getStringValue());
                }
                System.out.println("结束解析第"+index+"本书");
                index++;
            }
        } catch (DocumentException e) {
            e.printStackTrace();
        }
    }

  // 简易测试
    public static void main(String[] args) {
        Dom4jTest dom4jTest = new Dom4jTest();
        //生成xml
        dom4jTest.CreateXml();
        //解析xml
        dom4jTest.XMLParse();

    }
}

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; }
评论
添加红包

请填写红包祝福语或标题

红包个数最小为10个

红包金额最低5元

当前余额3.43前往充值 >
需支付:10.00
成就一亿技术人!
领取后你会自动成为博主和红包主的粉丝 规则
hope_wisdom
发出的红包
实付
使用余额支付
点击重新获取
扫码支付
钱包余额 0

抵扣说明:

1.余额是钱包充值的虚拟货币,按照1:1的比例进行支付金额的抵扣。
2.余额无法直接购买下载,可以购买VIP、付费专栏及课程。

余额充值