java解析xml

<?xml version="1.0" encoding="UTF-8"?>
<mimetype><default><mime-type>text/html</mime-type></default><mime-mapping><extension>zip</extension><mime-type>application/zip</mime-type></mime-mapping><mime-mapping><extension>xml</extension><mime-type>text/xml</mime-type></mime-mapping>
</mimetype>                

1. SAXReader

    public static void main(String[] args) throws FileNotFoundException, UnsupportedEncodingException, DocumentException {//流式读取File file = new File("mimetype.xml");Document doc = new SAXReader().read(file);Element mimetype = doc.getRootElement();System.out.println("根元素名：" + mimetype.getName());Element defaultElement = mimetype.element("default");System.out.println("默认元素的mime-type：" + defaultElement.elementText("mime-type"));List<Element> mime_mappings = mimetype.elements("mime-mapping");System.out.println("元素集合的数据：" + mime_mappings.size());}

这是读文件的，好像直接读字符串还不怎么方便。

String xml = "<?xml version=\"1.0\" encoding=\"UTF-8\"?><mimetype></mimetype>";
Reader reader = new StringReader(xml);
Document doc = new SAXReader().read(reader);

以Reader为桥梁来读取String类型的xml  2016-03-12 13:00:27

2. JAXB

@XmlRootElement(name="user")
public class User {public String name = "ken";public int age = 24;public static void main(String[] args) throws Exception {JAXBContext jaxbContext = JAXBContext.newInstance(User.class);  Marshaller jaxbMarshaller = jaxbContext.createMarshaller();  User m = new User();jaxbMarshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);  //有缩进
        jaxbMarshaller.marshal(m, System.out);  String xml = "<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"yes\"?><user><name>ken</name><age>24</age></user>";Unmarshaller unmarshaller = jaxbContext.createUnmarshaller();User m2 = (User) unmarshaller.unmarshal(new StringReader(xml));System.out.println("我的名字：" + m2.name);}
}

简单类型的解析与序列化  2016-03-12 17:48:55

@XmlRootElement(name="user")
public class User {public String name = "ken";public int age = 24;public Address address = new Address();public static class Address{public String name = "永州";}
}

  <?xml version="1.0" encoding="UTF-8" standalone="yes"?>
  <user>
    <name>ken</name>
    <age>24</age>
    <address>
        <name>永州</name>
    </address>
  </user>

 

@XmlRootElement(name="user")
public class User {public String name = "ken";public int age = 24;@XmlElementWrapper(name="list")  public List<Address> address;public static class Address{public String name = "永州";public Address(String name){this.name = name;}}
}

  <?xml version="1.0" encoding="UTF-8" standalone="yes"?>
  <user>
    <name>ken</name>
    <age>24</age>
    <list>
      <address>
          <name>永州</name>
      </address>
      <address>
          <name>广州</name>
      </address>
    </list>
  </user>