xmlutils.java

Java有关XML编程需要用到axis 的源代码 把里面bin下的包导入相应的Java工程 进行使用

/*
 * Copyright 2001-2004 The Apache Software Foundation.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.axis.utils ;

import org.apache.axis.AxisEngine;
import org.apache.axis.Constants;
import org.apache.axis.InternalException;
import org.apache.axis.Message;
import org.apache.axis.MessageContext;
import org.apache.axis.AxisProperties;
import org.apache.axis.components.encoding.XMLEncoder;
import org.apache.axis.components.encoding.XMLEncoderFactory;
import org.apache.axis.components.logger.LogFactory;
import org.apache.commons.logging.Log;
import org.w3c.dom.Attr;
import org.w3c.dom.CharacterData;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.NamedNodeMap;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.w3c.dom.Text;
import org.xml.sax.ErrorHandler;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;
import org.xml.sax.SAXParseException;
import org.xml.sax.XMLReader;
import org.xml.sax.helpers.DefaultHandler;

import javax.xml.namespace.QName;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;
import javax.xml.soap.SOAPException;
import javax.xml.soap.SOAPMessage;
import javax.xml.transform.Source;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.sax.SAXSource;
import javax.xml.transform.stream.StreamSource;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.StringWriter;
import java.io.UnsupportedEncodingException;
import java.io.Writer;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.ProtocolException;
import java.net.URL;
import java.net.URLConnection;
import java.util.Iterator;
import java.util.List;
import java.util.Stack;


public class XMLUtils {
    protected static Log log =
        LogFactory.getLog(XMLUtils.class.getName());

    public static final String httpAuthCharEncoding = "ISO-8859-1";
    private static final String saxParserFactoryProperty =
        "javax.xml.parsers.SAXParserFactory";

    private static DocumentBuilderFactory dbf = getDOMFactory();
    private static SAXParserFactory       saxFactory;
    private static Stack                  saxParsers = new Stack();
    private static DefaultHandler doNothingContentHandler = new DefaultHandler();

    private static String EMPTY = "";
    private static ByteArrayInputStream bais = new ByteArrayInputStream(EMPTY.getBytes());

    private static boolean tryReset= true;

    protected static boolean enableParserReuse = false;

    private static class ThreadLocalDocumentBuilder extends ThreadLocal {
        protected Object initialValue() {
            try {
                return getDOMFactory().newDocumentBuilder();
            } catch (ParserConfigurationException e) {
                log.error(Messages.getMessage("parserConfigurationException00"),
                        e);
            }
            return null; 
        }
    }     
    private static ThreadLocalDocumentBuilder documentBuilder = new ThreadLocalDocumentBuilder(); 
    
    static {
        // Initialize SAX Parser factory defaults
        initSAXFactory(null, true, false);

        String value = AxisProperties.getProperty(AxisEngine.PROP_XML_REUSE_SAX_PARSERS,
                "" + true);
        if (value.equalsIgnoreCase("true") ||
                value.equals("1") ||
                value.equalsIgnoreCase("yes")) {
            enableParserReuse = true;
        } else {
            enableParserReuse = false;
        }
    }

    /**
     * Encode a string appropriately for XML.
     * @param orig the String to encode
     * @return a String in which XML special chars are repalced by entities
     */
    public static String xmlEncodeString(String orig)
    {
        XMLEncoder encoder = getXMLEncoder(MessageContext.getCurrentContext());
        return encoder.encode(orig);
    }

    /**
     * Get the current XMLEncoder
     * @return XMLEncoder
     */
    public static XMLEncoder getXMLEncoder(MessageContext msgContext) {        
        return getXMLEncoder(getEncoding(null, msgContext));
    }
    
    /**
     * Get the XMLEncoder for specific encoding
     * @return XMLEncoder
     */
    public static XMLEncoder getXMLEncoder(String encoding) {
        XMLEncoder encoder = null;
        try {
            encoder = XMLEncoderFactory.getEncoder(encoding);
        } catch (Exception e) {
            log.error(Messages.getMessage("exception00"), e);
            encoder = XMLEncoderFactory.getDefaultEncoder();
        }
        return encoder;
    }

    /**
     * Get the current encoding in effect
     * @return string
     */
    public static String getEncoding(MessageContext msgContext) {
        XMLEncoder encoder = getXMLEncoder(msgContext);
        return encoder.getEncoding();
    }

    /**
     * Get the current encoding in effect
     * @return string
     */
    public static String getEncoding() {
        XMLEncoder encoder = getXMLEncoder(MessageContext.getCurrentContext());
        return encoder.getEncoding();
    }

    /** Initialize the SAX parser factory.
     *
     * @param factoryClassName The (optional) class name of the desired
     *                         SAXParserFactory implementation. Will be
     *                         assigned to the system property
     *                         <b>javax.xml.parsers.SAXParserFactory</b>
     *                         unless this property is already set.
     *                         If <code>null</code>, leaves current setting
     *                         alone.
     * @param namespaceAware true if we want a namespace-aware parser
     * @param validating true if we want a validating parser
     *
     */
    public static void initSAXFactory(String factoryClassName,
                                      boolean namespaceAware,
                                      boolean validating)
    {
        if (factoryClassName != null) {
            try {
                saxFactory = (SAXParserFactory)Class.forName(factoryClassName).
                    newInstance();
                /*
                 * Set the system property only if it is not already set to
                 * avoid corrupting environments in which Axis is embedded.
                 */
                if (System.getProperty(saxParserFactoryProperty) == null) {
                    System.setProperty(saxParserFactoryProperty,
                                       factoryClassName);
                }
            } catch (Exception e) {
                log.error(Messages.getMessage("exception00"), e);
                saxFactory = null;
            }
       } else {
            saxFactory = SAXParserFactory.newInstance();
        }
        saxFactory.setNamespaceAware(namespaceAware);
        saxFactory.setValidating(validating);

        // Discard existing parsers
        saxParsers.clear();
    }

    private static DocumentBuilderFactory getDOMFactory() {
        DocumentBuilderFactory dbf;
        try {
            dbf = DocumentBuilderFactory.newInstance();
            dbf.setNamespaceAware(true);
        }
        catch( Exception e ) {
            log.error(Messages.getMessage("exception00"), e );
            dbf = null;
        }
        return( dbf );
    }

    /**
     * Gets a DocumentBuilder
     * @return DocumentBuilder
     * @throws ParserConfigurationException
     */
    public static DocumentBuilder getDocumentBuilder() throws ParserConfigurationException {
        return (DocumentBuilder) documentBuilder.get();
    }

    /**
     * Releases a DocumentBuilder
     * @param db
     */
    public static void releaseDocumentBuilder(DocumentBuilder db) {
        try {
            db.setErrorHandler(null); // setting implementation default
        } catch (Throwable t) {
            log.debug("Failed to set ErrorHandler to null on DocumentBuilder",
                    t);
        }
        try {
            db.setEntityResolver(null); // setting implementation default
        } catch (Throwable t) {
            log.debug("Failed to set EntityResolver to null on DocumentBuilder",
                    t);
        }
    }

    /** Get a SAX parser instance from the JAXP factory.
     *
     * @return a SAXParser instance.
     */
    public static synchronized SAXParser getSAXParser() {
        if(enableParserReuse && !saxParsers.empty()) {
            return (SAXParser )saxParsers.pop();
        }

        try {
            SAXParser parser = saxFactory.newSAXParser();
            XMLReader reader = parser.getXMLReader();
            // parser.getParser().setEntityResolver(new DefaultEntityResolver());
            // The above commented line and the following line are added
            // for preventing XXE (bug #14105).
            // We may need to uncomment the deprecated setting
            // in case that it is considered necessary.
            try {
                reader.setEntityResolver(new DefaultEntityResolver());
            } catch (Throwable t) {
                log.debug("Failed to set EntityResolver on DocumentBuilder", t);
            }
            reader.setFeature("http://xml.org/sax/features/namespace-prefixes", false);
            return parser;
        } catch (ParserConfigurationException e) {
            log.error(Messages.getMessage("parserConfigurationException00"), e);
            return null;
        } catch (SAXException se) {
            log.error(Messages.getMessage("SAXException00"), se);
            return null;
        }
    }


    /** Return a SAX parser for reuse.
     * @param parser A SAX parser that is available for reuse
     */
    public static void releaseSAXParser(SAXParser parser) {
        if(!tryReset || !enableParserReuse) return;

        //Free up possible ref. held by past contenthandler.
        try{
            XMLReader xmlReader= parser.getXMLReader();
            if(null != xmlReader){
                xmlReader.setContentHandler(doNothingContentHandler);
                xmlReader.setDTDHandler(doNothingContentHandler);
                try {
                    xmlReader.setEntityResolver(doNothingContentHandler);
                } catch (Throwable t) {
                    log.debug("Failed to set EntityResolver on DocumentBuilder", t);
                }
                try {
                    xmlReader.setErrorHandler(doNothingContentHandler);
                } catch (Throwable t) {
                    log.debug("Failed to set ErrorHandler on DocumentBuilder", t);
                }

                synchronized (XMLUtils.class ) {
                    saxParsers.push(parser);
                }
            }
            else {
                tryReset= false;
            }
        } catch (org.xml.sax.SAXException e) {