利用 JavaBean 读取xml文件

不念不忘少年蓝@ 2022-02-03 12:53 282阅读 0赞

package demo20130531;
    
    import javax.xml.bind.annotation.XmlRootElement;
    @XmlRootElement
    public class Article {
    
    	private String title;
    
    	private String author;
    
    	private String email;
    
    	private String date;
    
    	private Authors authors;
    	
    	public String getTitle() {
    		return title;
    	}
    
    	public void setTitle(String title) {
    		this.title = title;
    	}
    
    	public String getAuthor() {
    		return author;
    	}
    
    	public void setAuthor(String author) {
    		this.author = author;
    	}
    
    	public String getEmail() {
    		return email;
    	}
    
    	public void setEmail(String email) {
    		this.email = email;
    	}
    
    	public String getDate() {
    		return date;
    	}
    
    	public void setDate(String date) {
    		this.date = date;
    	}
    
    	public Authors getAuthors() {
    		return authors;
    	}
    
    	public void setAuthors(Authors authors) {
    		this.authors = authors;
    	}
    
    
    }
    
    
    <?xml version="1.0" encoding="UTF-8"?><articles><article><title>hello</title><author>ctl</author><email>ctl_cn@163.com</email><date>1991-06-29</date><authors><age>22</age><sex>M</sex><address>河南</address></authors></article></articles>
     
     package demo20130531;
    
    public class Authors {
    	private int age;
    	private String sex;//不可以是char类型
    	private String address;
    	public int getAge() {
    		return age;
    	}
    
    	public void setAge(int age) {
    		this.age = age;
    	}
    
    	public String getSex() {
    		return sex;
    	}
    
    	public void setSex(String sex) {
    		this.sex = sex;
    	}
    
    	public String getAddress() {
    		return address;
    	}
    
    	public void setAddress(String address) {
    		this.address = address;
    	}
    
    	public String toString() {
    		return "age:" + age +
    				"  sex:" + sex +
    				" address:" + address;
    	}
    }
    
    
     package demo20130531;
    
    import java.io.File;
    import java.io.IOException;
    import java.util.ArrayList;
    import java.util.Iterator;
    import java.util.List;
    
    import javax.xml.bind.JAXBContext;
    import javax.xml.bind.JAXBException;
    import javax.xml.bind.Unmarshaller;
    import javax.xml.bind.annotation.XmlRootElement;
    import javax.xml.bind.annotation.adapters.XmlJavaTypeAdapter;
    
    //根元素的标签名为articles
    @XmlRootElement(name = "articles")
    public class ArticleData {
    
    	//articles元素下有多个article元素
    	List<Article> article = new ArrayList<Article>();
    
    	public List<Article> getArticle() {
    		return article;
    	}
    
    	public void setArticle(List<Article> article) {
    		this.article = article;
    	}
    
    	public static void main(String[] args) throws IOException {
    
    		// 创建xml文档对象，其保存在E盘的根目录下的article.xml文件
    		File xmlFile = new File("src2/demo20130531/article.xml");
    //		System.out.println(xmlFile.getAbsolutePath());
    //		System.out.println(xmlFile.getParent());
    		if(!xmlFile.exists())
    			xmlFile.createNewFile();
    		// 声明JAXBContext上下文对象
    		JAXBContext context;
    		try {
    			// 通过指定映射的类创建上下文
    			context = JAXBContext.newInstance(ArticleData.class);
    			// 通过上下文创建xml转化java的对象Unmarshaller
    			Unmarshaller u = context.createUnmarshaller();
    			// 将xml数据转换成java对象
    			ArticleData data = (ArticleData) u.unmarshal(xmlFile);
    			// 获得所有的article数据
    			List<Article> articles = data.getArticle();
    			for (Article a : articles) {
    				System.out.println("-------------------------");
    				System.out.println(a.getAuthor());
    				System.out.println(a.getDate());
    				System.out.println(a.getEmail());
    				System.out.println(a.getTitle());
    				System.out.println(a.getAuthors().getAddress()+"  "+a.getAuthors().getAge()+" "+a.getAuthors().getSex());
    				System.out.println(a.getAuthors());
    			}
    		} catch (JAXBException e) {
    			e.printStackTrace();
    		}
    	}
    }