XML--Java中的四种常见解析方式--jdom与dom4j

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jdom与dom4j作为特地为java的实现，比较灵活适合熟悉Java的人

jdom主要构建方法

SAXBuilder sax=new SAXBuilder();

方法一： InputStream in=new FileInputStream("rec\\books.xml");

Document document=sax.build(in);
方法二: Document document=sax.build("rec\\books.xml");

直接使用Element类获取节点 List接收集合

Element rootElement=document.getRootElement();

List<Element> booklist=rootElement.getChildren();

List<Attribute> attrlist=booktemp.getAttributes()

List<Element> childs=booktemp.getChildren();

PS：乱码不改xml文件编码类型是可用inputStreamReader包装 FileInputStream更改读取的编码方式，再将reader传入sax.bulid

public class Jdomtest {private static List<book> bookslist=new ArrayList<book>();    public static void main(String[] args) {        SAXBuilder sax=new SAXBuilder();        InputStream in;        try {//        in=new FileInputStream("rec\\books.xml");//        Document document=sax.build(in);        Document document=sax.build("rec\\books.xml");        Element rootElement=document.getRootElement();        List<Element> booklist=rootElement.getChildren();        for (Element booktemp : booklist) {            book bookbuf=new book();            List<Attribute> attrlist=booktemp.getAttributes();            System.out.println("解析第"+(booklist.indexOf(booktemp)+1)+"本书");            for(Attribute attr:attrlist){                System.out.println("解析书本的第"+(attrlist.indexOf(attr)+1)+"个属性");                System.out.println(attr.getName()+":"+attr.getValue());            if(attr.getName().equals("id"))                bookbuf.id=attr.getValue();            }            List<Element> childs=booktemp.getChildren();            for(Element child:childs){                System.out.println(childs.indexOf(child)+1+":"+child.getName()+"----"+child.getValue());                if(child.getName().equals("name"))                    bookbuf.name=child.getValue();                if(child.getName().equals("years"))                    bookbuf.years=child.getValue();                if(child.getName().equals("price"))                    bookbuf.price=child.getValue();            }            bookslist.add(bookbuf);            System.out.println("第"+(booklist.indexOf(booktemp)+1)+"本书解析完毕"+"成功添加了"+bookbuf.name);            bookbuf=null;        }    for (book bookq : bookslist) {        System.out.println("书名："+bookq.name);            System.out.println("出版年份："+bookq.years);            System.out.println("价格："+bookq.price);        }     } catch (FileNotFoundException e) {        // TODO Auto-generated catch block        e.printStackTrace();    }    // TODO Auto-generated method stub catch (JDOMException e) {        // TODO Auto-generated catch block        e.printStackTrace();    } catch (IOException e) {        // TODO Auto-generated catch block        e.printStackTrace();    }    }}

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dom4j主要构建方法

SAXReader reader = new SAXReader();

Document document = reader.read(new File("rec/books.xml"));

其大致方法与jdom无异。

其获取子节点的方式常通过elementIterator实现得到一个Iterator

Iterator<Element> it = bookstore.elementIterator();

子节点根据不同类型有getStringValue();getIntValue()等

public class Jdom4jtest {private static ArrayList<book> booklist=new ArrayList<book>();    public static void main(String[] args) {        // TODO Auto-generated method stub        SAXReader reader = new SAXReader();        try {            Document document = reader.read(new File("rec/books.xml"));            Element bookstore = document.getRootElement();            Iterator<Element> it = bookstore.elementIterator();            while (it.hasNext()) {                book tempbook =new book();                Element elementbook = it.next();                List<Attribute> attributes = elementbook.attributes();                System.out.println("开始遍历属性");                for (Attribute attr : attributes) {                    System.out.println("第" + attributes.indexOf(attr) + 1                            + "个属性" + attr.getName() + ":"                            + attr.getStringValue());                    tempbook.id=attr.getStringValue();                }                Iterator<Element> itchild = elementbook.elementIterator();                while (itchild.hasNext()) {                    Element bookchild = itchild.next();                    System.out.println(bookchild.getName() + "---"                            + bookchild.getStringValue());                    if(bookchild.getName().equals("name"))                        tempbook.name=bookchild.getStringValue();                    if(bookchild.getName().equals("years"))                        tempbook.years=bookchild.getStringValue();                    if(bookchild.getName().equals("price"))                        tempbook.price=bookchild.getStringValue();                }                booklist.add(tempbook);                tempbook=null;            }        } catch (DocumentException e) {            // TODO Auto-generated catch block            e.printStackTrace();        }        printbook();    }public static void printbook(){    for (book booktemp : booklist) {        System.out.println(booktemp.id+":"+booktemp.name);        System.out.println("年份---"+booktemp.years);        System.out.println("价格---"+booktemp.price);            }    }}

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