dom4j生成和解析xml文件

要生成和解析如下格式的xml文件：

<?xml version="1.0" encoding="UTF-8"?>

<Message xmlns:xs="http://www.w3.org/2001/XMLSchema">

  <User>

    <id>1</id>

    <name>李寻欢</name>

    <age>30</age>

    <Address>

      <id>1</id>

      <province>广东省</province>

      <city>广州市</city>

      <area>越秀区</area>

      <street>环市东路</street>

    </Address>

  </User>

</Message>

　　1、两个数据实体类

　　　　1）User类

/**

 * @Description: 用户

 */

public class User {

    private Long id;

    //姓名

    private String name;

    //年龄

    private Integer age;

    //地址

    private Address address;

    public Long getId() {

        return id;

    }

    public void setId(Long id) {

        this.id = id;

    }

    public String getName() {

        return name;

    }

    public void setName(String name) {

        this.name = name;

    }

    public Integer getAge() {

        return age;

    }

    public void setAge(Integer age) {

        this.age = age;

    }

    public Address getAddress() {

        return address;

    }

    public void setAddress(Address address) {

        this.address = address;

    }

}

　　　　2）Address类

/**

 *

 * @Description: 地址

 */

public class Address {

    private Long id;

    //省份

    private String province;

    //城市

    private String city;

    //区县

    private String area;

    //街道

    private String street;

    public Long getId() {

        return id;

    }

    public void setId(Long id) {

        this.id = id;

    }

    public String getProvince() {

        return province;

    }

    public void setProvince(String province) {

        this.province = province;

    }

    public String getCity() {

        return city;

    }

    public void setCity(String city) {

        this.city = city;

    }

    public String getArea() {

        return area;

    }

    public void setArea(String area) {

        this.area = area;

    }

    public String getStreet() {

        return street;

    }

    public void setStreet(String street) {

        this.street = street;

    }

}

　　2、使用dom4j生成xml和解析xml的工具类

import java.io.BufferedWriter;

import java.io.File;

import java.io.FileOutputStream;

import java.io.IOException;

import java.io.OutputStreamWriter;

import java.util.HashMap;

import java.util.Iterator;

import java.util.Map;

import org.dom4j.Document;

import org.dom4j.DocumentException;

import org.dom4j.DocumentHelper;

import org.dom4j.Element;

import org.dom4j.io.OutputFormat;

import org.dom4j.io.SAXReader;

import org.dom4j.io.XMLWriter;

/**

 *

 * @Description: Xml生成解析工具

 * @author Luxh

 */

public class XmlUtil {

    /**

     * 生成xml文档

     * @param user 用户信息

     * @return

     */

    private static Document generateDocument(User user) {

        Document document = DocumentHelper.createDocument();

        //添加元素 Message

        Element messageElement = document.addElement("Message");

        //给Message元素添加属性 xmlns:xs="http://www.w3.org/2001/XMLSchema"

        messageElement.addAttribute("xmlns:xs", "http://www.w3.org/2001/XMLSchema");

        //添加元素 User

        Element userElement = messageElement.addElement("User");

        //添加User子元素 id

        Element idElement = userElement.addElement("id");

        //给id元素赋值

        idElement.setText(String.valueOf(user.getId()));

        //添加User子元素 name

        Element nameElement = userElement.addElement("name");

        //给name元素赋值

        nameElement.setText(user.getName());

        //添加User子元素 age

        Element ageElement = userElement.addElement("age");

        //给age元素赋值

        ageElement.setText(String.valueOf(user.getAge()));

        //添加User子元素 Address

        Element addressElement = userElement.addElement("Address");

        //添加Address子元素 id

        Element addressIdElement = addressElement.addElement("id");

        //给id元素赋值

        addressIdElement.setText(String.valueOf(user.getAddress().getId()));

        //添加Address子元素 province

        Element provinceElement = addressElement.addElement("province");

        //给province元素赋值

        provinceElement.setText(user.getAddress().getProvince());

        //添加Address子元素 city

        Element cityElement = addressElement.addElement("city");

        //给city元素赋值

        cityElement.setText(user.getAddress().getCity());

        //添加Address子元素 area

        Element areaElement = addressElement.addElement("area");

        //给area元素赋值

        areaElement.setText(user.getAddress().getArea());

        //添加Address子元素 street

        Element streetElement = addressElement.addElement("street");

        //给street元素赋值

        streetElement.setText(user.getAddress().getStreet());

        return document;

    }

    /**

     * 生成xml文件

     */

    public static void generateXmlFile(User user) {

        Document document = generateDocument(user);

        XMLWriter out = null;

        BufferedWriter bw = null;

        OutputStreamWriter osw = null;

        FileOutputStream fos = null;

        try {

            File xmlFile = new File("D:/user.xml");//输出xml的路径

            fos = new FileOutputStream(xmlFile);

            osw = new OutputStreamWriter(fos,"UTF-8");//指定编码，防止写中文乱码

            bw = new BufferedWriter(osw);

            //对xml输出格式化

            OutputFormat format = OutputFormat.createPrettyPrint();

            format.setEncoding("UTF-8");

            out = new XMLWriter(bw, format);

            out.write(document);

        } catch (IOException e) {

            e.printStackTrace();

        }finally {

            try {

                if(out != null) {

                    out.close();

                }

                if(bw != null) {

                    bw.close();

                }

                if(osw != null) {

                    osw.close();

                }

                if(fos != null) {

                    fos.close();

                }

            } catch (IOException e) {

                e.printStackTrace();

            }

        }

    }

    /**

     * 解析xml文件

     * @param xmlFile

     * @return

     * @throws DocumentException

     */

    public static User analyzeXmlFile(File xmlFile) throws DocumentException {

        SAXReader saxReader = new SAXReader();

        Document document = saxReader.read(xmlFile);

        //获取根元素Message

        Element messageElement = document.getRootElement();

        //获取Message元素下的子元素

        Iterator<Element> oneLevelElementItor = messageElement.elementIterator();

        Map<String,String> userAttrMap = new HashMap<String,String>();

        Map<String,String> addressAttrMap = new HashMap<String,String>();

        while(oneLevelElementItor.hasNext()){

            Element e1 = oneLevelElementItor.next();

            System.out.println("Message子元素："+e1.getName());

            //获取User元素下的子元素

            Iterator<Element> twoLevelElementItor = e1.elementIterator();

            while(twoLevelElementItor.hasNext()) {

                Element e2 = twoLevelElementItor.next();

                System.out.println("User子元素："+e2.getName());

                userAttrMap.put(e2.getName(), e2.getText());

                //获取Address下的子元素

                if("Address".equals(e2.getName())) {

                    Iterator<Element> threeLevelElementItor = e2.elementIterator();

                    while(threeLevelElementItor.hasNext()) {

                        Element e3 = threeLevelElementItor.next();

                        System.out.println("Address子元素："+e3.getName());

                        addressAttrMap.put(e3.getName(), e3.getText());

                    }

                }

            }

        }

        //将解析出来的数据封装成User

        User user = new User();

        user.setId(Long.valueOf(userAttrMap.get("id")));

        user.setName(userAttrMap.get("name"));

        user.setAge(Integer.valueOf(userAttrMap.get("age")));

        Address address = new Address();

        address.setId(Long.valueOf(addressAttrMap.get("id")));

        address.setProvince(addressAttrMap.get("province"));

        address.setCity(addressAttrMap.get("city"));

        address.setArea(addressAttrMap.get("area"));

        address.setStreet(addressAttrMap.get("street"));

        user.setAddress(address);

        return user;

    }

}

　　3、测试

import java.io.File;

import org.dom4j.DocumentException;

import org.junit.Test;

public class UserXmlTest {

    /**

     * 生成xml文件

     */

    @Test

    public void testGenerateXml() {

        //构造一个用户信息

        User user = new User();

        user.setId(1L);

        user.setName("李寻欢");

        user.setAge(30);

        Address address = new Address();

        address.setId(1L);

        address.setProvince("广东省");

        address.setCity("广州市");

        address.setArea("越秀区");

        address.setStreet("环市东路");

        user.setAddress(address);

        XmlUtil.generateXmlFile(user);

    }

    /**

     * 解析xml文件

     * @throws DocumentException

     */

    @Test

    public void testAnalyzeXmlFile() throws DocumentException {

        File xmlFile = new File("D:/user.xml");

        User user = XmlUtil.analyzeXmlFile(xmlFile);

        System.out.println("user'name is :"+user.getName());

        System.out.println("user'address'province is :"+user.getAddress().getProvince());

    }

}

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dom4j生成和解析xml文件

dom4j生成和解析xml文件

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