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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><!--NewPage--><HTML><HEAD><!-- Generated by javadoc (build 1.5.0_14) on Mon Jan 28 05:46:59 PST 2008 --><TITLE>Unmarshaller (Java EE 5)</TITLE><META NAME="keywords" CONTENT="javax.xml.bind.Unmarshaller interface"><LINK REL ="stylesheet" TYPE="text/css" HREF="../../../stylesheet.css" TITLE="Style"><SCRIPT type="text/javascript">function windowTitle(){ parent.document.title="Unmarshaller (Java EE 5)";}</SCRIPT><NOSCRIPT></NOSCRIPT></HEAD><BODY BGCOLOR="white" onload="windowTitle();"><!-- ========= START OF TOP NAVBAR ======= --><A NAME="navbar_top"><!-- --></A><A HREF="#skip-navbar_top" title="Skip navigation links"></A><TABLE BORDER="0" WIDTH="100%" CELLPADDING="1" CELLSPACING="0" SUMMARY=""><TR><TD COLSPAN=2 BGCOLOR="#EEEEFF" CLASS="NavBarCell1"><A NAME="navbar_top_firstrow"><!-- --></A><TABLE BORDER="0" CELLPADDING="0" CELLSPACING="3" SUMMARY=""> <TR ALIGN="center" VALIGN="top"> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../overview-summary.html"><FONT CLASS="NavBarFont1"><B>Overview</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="package-summary.html"><FONT CLASS="NavBarFont1"><B>Package</B></FONT></A> </TD> <TD BGCOLOR="#FFFFFF" CLASS="NavBarCell1Rev"> <FONT CLASS="NavBarFont1Rev"><B>Class</B></FONT> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="package-tree.html"><FONT CLASS="NavBarFont1"><B>Tree</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../deprecated-list.html"><FONT CLASS="NavBarFont1"><B>Deprecated</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../index-all.html"><FONT CLASS="NavBarFont1"><B>Index</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../help-doc.html"><FONT CLASS="NavBarFont1"><B>Help</B></FONT></A> </TD> </TR></TABLE></TD><TD ALIGN="right" VALIGN="top" ROWSPAN=3><EM></EM></TD></TR><TR><TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="../../../javax/xml/bind/UnmarshalException.html" title="class in javax.xml.bind"><B>PREV CLASS</B></A> <A HREF="../../../javax/xml/bind/Unmarshaller.Listener.html" title="class in javax.xml.bind"><B>NEXT CLASS</B></A></FONT></TD><TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="../../../index.html?javax/xml/bind/Unmarshaller.html" target="_top"><B>FRAMES</B></A> <A HREF="Unmarshaller.html" target="_top"><B>NO FRAMES</B></A> <SCRIPT type="text/javascript"> <!-- if(window==top) { document.writeln('<A HREF="../../../allclasses-noframe.html"><B>All Classes</B></A>'); } //--></SCRIPT><NOSCRIPT> <A HREF="../../../allclasses-noframe.html"><B>All Classes</B></A></NOSCRIPT></FONT></TD></TR><TR><TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2"> SUMMARY: <A HREF="#nested_class_summary">NESTED</A> | FIELD | CONSTR | <A HREF="#method_summary">METHOD</A></FONT></TD><TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2">DETAIL: FIELD | CONSTR | <A HREF="#method_detail">METHOD</A></FONT></TD></TR></TABLE><A NAME="skip-navbar_top"></A><!-- ========= END OF TOP NAVBAR ========= --><HR><!-- ======== START OF CLASS DATA ======== --><H2><FONT SIZE="-1">javax.xml.bind</FONT><BR>Interface Unmarshaller</H2><DL><DT><B>All Known Implementing Classes:</B> <DD><A HREF="../../../javax/xml/bind/helpers/AbstractUnmarshallerImpl.html" title="class in javax.xml.bind.helpers">AbstractUnmarshallerImpl</A></DD></DL><HR><DL><DT><PRE>public interface <B>Unmarshaller</B></DL></PRE><P>The <tt>Unmarshaller</tt> class governs the process of deserializing XML data into newly created Java content trees, optionally validating the XML data as it is unmarshalled. It provides an overloading of unmarshal methods for many different input kinds. <p> Unmarshalling from a File: <blockquote> <pre> JAXBContext jc = JAXBContext.newInstance( "com.acme.foo" ); Unmarshaller u = jc.createUnmarshaller(); Object o = u.unmarshal( new File( "nosferatu.xml" ) ); </pre> </blockquote> <p> Unmarshalling from an InputStream: <blockquote> <pre> InputStream is = new FileInputStream( "nosferatu.xml" ); JAXBContext jc = JAXBContext.newInstance( "com.acme.foo" ); Unmarshaller u = jc.createUnmarshaller(); Object o = u.unmarshal( is ); </pre> </blockquote> <p> Unmarshalling from a URL: <blockquote> <pre> JAXBContext jc = JAXBContext.newInstance( "com.acme.foo" ); Unmarshaller u = jc.createUnmarshaller(); URL url = new URL( "http://beaker.east/nosferatu.xml" ); Object o = u.unmarshal( url ); </pre> </blockquote> <p> Unmarshalling from a StringBuffer using a <tt>javax.xml.transform.stream.StreamSource</tt>: <blockquote> <pre> JAXBContext jc = JAXBContext.newInstance( "com.acme.foo" ); Unmarshaller u = jc.createUnmarshaller(); StringBuffer xmlStr = new StringBuffer( "<?xml version="1.0"?>..." ); Object o = u.unmarshal( new StreamSource( new StringReader( xmlStr.toString() ) ) ); </pre> </blockquote> <p> Unmarshalling from a <tt>org.w3c.dom.Node</tt>: <blockquote> <pre> JAXBContext jc = JAXBContext.newInstance( "com.acme.foo" ); Unmarshaller u = jc.createUnmarshaller(); DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance(); dbf.setNamespaceAware(true); DocumentBuilder db = dbf.newDocumentBuilder(); Document doc = db.parse(new File( "nosferatu.xml")); Object o = u.unmarshal( doc ); </pre> </blockquote> <p> Unmarshalling from a <tt>javax.xml.transform.sax.SAXSource</tt> using a client specified validating SAX2.0 parser: <blockquote> <pre> // configure a validating SAX2.0 parser (Xerces2) static final String JAXP_SCHEMA_LANGUAGE = "http://java.sun.com/xml/jaxp/properties/schemaLanguage"; static final String JAXP_SCHEMA_LOCATION = "http://java.sun.com/xml/jaxp/properties/schemaSource"; static final String W3C_XML_SCHEMA = "http://www.w3.org/2001/XMLSchema"; System.setProperty( "javax.xml.parsers.SAXParserFactory", "org.apache.xerces.jaxp.SAXParserFactoryImpl" ); SAXParserFactory spf = SAXParserFactory.newInstance(); spf.setNamespaceAware(true); spf.setValidating(true); SAXParser saxParser = spf.newSAXParser(); try { saxParser.setProperty(JAXP_SCHEMA_LANGUAGE, W3C_XML_SCHEMA); saxParser.setProperty(JAXP_SCHEMA_LOCATION, "http://...."); } catch (SAXNotRecognizedException x) { // exception handling omitted } XMLReader xmlReader = saxParser.getXMLReader(); SAXSource source = new SAXSource( xmlReader, new InputSource( "http://..." ) ); // Setup JAXB to unmarshal JAXBContext jc = JAXBContext.newInstance( "com.acme.foo" ); Unmarshaller u = jc.createUnmarshaller(); ValidationEventCollector vec = new ValidationEventCollector(); u.setEventHandler( vec ); // turn off the JAXB provider's default validation mechanism to // avoid duplicate validation u.setValidating( false ) // unmarshal Object o = u.unmarshal( source ); // check for events if( vec.hasEvents() ) { // iterate over events } </pre> </blockquote> <p> Unmarshalling from a StAX XMLStreamReader: <blockquote> <pre> JAXBContext jc = JAXBContext.newInstance( "com.acme.foo" ); Unmarshaller u = jc.createUnmarshaller(); javax.xml.stream.XMLStreamReader xmlStreamReader = javax.xml.stream.XMLInputFactory().newInstance().createXMLStreamReader( ... ); Object o = u.unmarshal( xmlStreamReader ); </pre> </blockquote>⌨️ 快捷键说明
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