How to parse a String containing XML in Java and retrieve the value of the root node

Question

I have XML in the form of a String that contains    lt message gt HELLO  lt  message gt     How can I get the String  Hello   from the XML  It should be ridiculously easy but I am lost  The XML isn t in a doc  it is simply a String

User · Answer

You could do this with JAXB  an implementation is included in Java SE 6    import java io StringReader  import javax xml bind    import javax xml transform stream StreamSource   public class Demo        public static void main String   args  throws Exception           String xmlString     lt message gt HELLO  lt  message gt             JAXBContext jc   JAXBContext newInstance String class           Unmarshaller unmarshaller   jc createUnmarshaller            StreamSource xmlSource   new StreamSource new StringReader xmlString            JAXBElement lt String gt  je   unmarshaller unmarshal xmlSource  String class           System out println je getValue                Output  HELLO

User · Answer

I think you would be look at String class  there are multiple ways to do it  What about substring int int  and indexOf int  lastIndexOf int

User · Answer

One of the above answer states to convert XML String to bytes which is not needed  Instead you can can use  InputSource and supply it with StringReader   String xmlStr     lt message gt HELLO  lt  message gt    DocumentBuilder db   DocumentBuilderFactory newInstance   newDocumentBuilder    Document doc   db parse new InputSource new StringReader xmlStr     System out println doc getFirstChild   getNodeValue

User · Answer

There is doing XML reading right  or doing the dodgy just to get by  Doing it right would be using proper document parsing   Or    dodgy would be using custom text parsing with either wisuzu s response or using regular expressions with matchers

User · Answer

Using JDOM   String xml     lt message gt HELLO  lt  message gt    org jdom input SAXBuilder saxBuilder   new SAXBuilder    try       org jdom Document doc   saxBuilder build new StringReader xml        String message   doc getRootElement   getText        System out println message     catch  JDOMException e           handle JDOMException   catch  IOException e           handle IOException     Using the Xerces DOMParser   String xml     lt message gt HELLO  lt  message gt    DOMParser parser   new DOMParser    try       parser parse new InputSource new java io StringReader xml         Document doc   parser getDocument        String message   doc getDocumentElement   getTextContent        System out println message     catch  SAXException e           handle SAXException    catch  IOException e           handle IOException      Using the JAXP interfaces   String xml     lt message gt HELLO  lt  message gt    DocumentBuilderFactory dbf   DocumentBuilderFactory newInstance    DocumentBuilder db   null  try       db   dbf newDocumentBuilder        InputSource is   new InputSource        is setCharacterStream new StringReader xml        try           Document doc   db parse is           String message   doc getDocumentElement   getTextContent            System out println message         catch  SAXException e               handle SAXException       catch  IOException e               handle IOException         catch  ParserConfigurationException e1           handle ParserConfigurationException

User · Answer

You could also use tools provided by the base JRE   String msg     lt message gt HELLO  lt  message gt    DocumentBuilder newDocumentBuilder   DocumentBuilderFactory newInstance   newDocumentBuilder    Document parse   newDocumentBuilder parse new ByteArrayInputStream msg getBytes      System out println parse getFirstChild   getTextContent

[java] How to parse a String containing XML in Java and retrieve the value of the root node?

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