Java 使用sax获取内部xml

Java 使用sax获取内部xml,java,xml,xml-parsing,sax,Java,Xml,Xml Parsing,Sax,我有这样一个xml: <Message xmlns="uri_of_message"> <VendorId>1234</VendorId> <SequenceNumber>1</SequenceNumber> ...other important headers... <Data> <Functions xmlns="uri_of_functions_subxml"> <

我有这样一个xml:

<Message xmlns="uri_of_message">
  <VendorId>1234</VendorId>
  <SequenceNumber>1</SequenceNumber>
  ...other important headers...
  <Data>
    <Functions xmlns="uri_of_functions_subxml">
      <Function1 attr="sth">
        <Info>Some_Info</Info>
      </Function1>
      <Function2>
        <Info>Some_Info</Info>
      </Function2>
      ...Functions n...
    </Functions>
  </Data>
</Message>
但后来我意识到characters方法没有正确收集xml,它可能拒绝了像“”这样的特殊字符

下面的链接包含相同的问题,但答案不适用于我,因为外部xml必须作为某种握手信号处理,而内部xml必须以完全不同的方式处理

我唯一需要的是正确地收集内部xml。但是,怎么做呢?
提前感谢。

SAX似乎不是这份工作的最佳选择,无论如何,试试看

    SAXParser p = SAXParserFactory.newInstance().newSAXParser();
    XMLReader filter = new XMLFilterImpl(p.getXMLReader()) {
        private boolean inFunctions;

        @Override
        public void startElement(String uri, String localName, String qName, Attributes atts) throws SAXException {
            if (!inFunctions && qName.equals("Functions")) {
                inFunctions = true;
            }
            if (inFunctions) {
                super.startElement(uri, localName, qName, atts);
            } else {
                qName.equals("Functions");
            }
        }

        @Override
        public void endElement(String uri, String localName, String qName) throws SAXException {
            if (inFunctions) {
                super.endElement(uri, localName, qName);
                if (qName.equals("Functions")) {
                    inFunctions = false;
                }
            }
        }

        @Override
        public void characters(char[] ch, int start, int length) throws SAXException {
            if (inFunctions) {
                super.characters(ch, start, length);
            }
        }
    };
    Transformer t = TransformerFactory.newInstance().newTransformer();
    Source source = new SAXSource(filter, new InputSource(new FileInputStream("1.xml")));
    Result result = new StreamResult(System.out);
    t.transform(source, result);
}
输出

<?xml version="1.0" encoding="UTF-8"?><Functions xmlns="uri_of_functions_subxml">
      <Function1 attr="sth">
        <Info>Some_Info</Info>
      </Function1>
      <Function2>
        <Info>Some_Info</Info>
      </Function2>
    </Functions>

一些信息
一些信息

您似乎不了解SAX是如何工作的。不能将XML标记视为characters方法的内容。此方法将只拾取XML文档的文本节点(标记之间的内容)。您的问题似乎更像是一项工作,而不是SAX。如果您准备接受一个非SAX的答案,我将向您展示如何做到这一点。我在开始使用SAX时不理解的是,SAX框架在遇到xml文档中不同类型的内容时调用的回调函数。
    SAXParser p = SAXParserFactory.newInstance().newSAXParser();
    XMLReader filter = new XMLFilterImpl(p.getXMLReader()) {
        private boolean inFunctions;

        @Override
        public void startElement(String uri, String localName, String qName, Attributes atts) throws SAXException {
            if (!inFunctions && qName.equals("Functions")) {
                inFunctions = true;
            }
            if (inFunctions) {
                super.startElement(uri, localName, qName, atts);
            } else {
                qName.equals("Functions");
            }
        }

        @Override
        public void endElement(String uri, String localName, String qName) throws SAXException {
            if (inFunctions) {
                super.endElement(uri, localName, qName);
                if (qName.equals("Functions")) {
                    inFunctions = false;
                }
            }
        }

        @Override
        public void characters(char[] ch, int start, int length) throws SAXException {
            if (inFunctions) {
                super.characters(ch, start, length);
            }
        }
    };
    Transformer t = TransformerFactory.newInstance().newTransformer();
    Source source = new SAXSource(filter, new InputSource(new FileInputStream("1.xml")));
    Result result = new StreamResult(System.out);
    t.transform(source, result);
}
<?xml version="1.0" encoding="UTF-8"?><Functions xmlns="uri_of_functions_subxml">
      <Function1 attr="sth">
        <Info>Some_Info</Info>
      </Function1>
      <Function2>
        <Info>Some_Info</Info>
      </Function2>
    </Functions>