當節點內部文本是html時，Java解析xml文件

Question

現在我正在使用SAXParser和我自己的處理程序，它可以解析除了type =“html”之外的所有節點值

我的角色功能是這樣的：

public void characters(char ch[], int start, int length) throws SAXException {
        if(content){
        String tmp = new String(ch, start, length);
        System.out.println("Content : " + tmp);
        content = false;
        }

並且該特定節點具有以下格式，我的輸出總是只給我一堆\\ n而不是別的。

   <content type="html">

    &lt;img alt="" src="http://cdn2.sbnation.com/entry_photo_images/8767829/stranger-bad-robot-screencap_large.png" /&gt;


     &lt;p&gt;Bad Robot, the production company founded by geek culture hitmaker J.J. Abrams (&lt;i&gt;Lost&lt;/i&gt;, &lt;i&gt;Fringe&lt;/i&gt;, &lt;i&gt;Star Trek: Into Darkness&lt;/i&gt;, &lt;i&gt;Alias&lt;/i&gt;,&amp;nbsp;etc.), has released a&amp;nbsp;&lt;a href="http://youtu.be/FWaAZCaQXdo" target="_blank"&gt;mysterious new trailer&lt;/a&gt; titled "Stranger." The creepy and inscrutable video spot, posted by the official Bad Robot Twitter account this afternoon, features a starry sky; a long-haired, rope-bound man wandering along a desolate monochromatic shore line; and your garden variety, horrifying stitched-mouth person coming into focus. "Men are erased and reborn," intones a narrator that sounds a little like Leonard Nimoy.&lt;/p&gt;
     &lt;p&gt;&lt;/p&gt;



    </content>

Answer 1

您應該使用StringBuffer來存儲內容，如以下主題中所述：

SAX解析和特殊字符

無法使用java從xml中讀取特殊字符

Answer 2

您可能錯誤地認為characters回調僅在startElement和endElement回調之間發生一次。 它實際上被多次調用。

由於您使用content布爾成員來確定是否打印東西，並在characters回調中將此同一成員設置為false ，因此您的條件必須只滿足一次，直到重置content為止（不清楚您在何處執行此操作） ）。

這是一個適合您的XML的示例（假設非混合內容和Java編程語言）：

import java.io.IOException;
import java.io.StringReader;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;
import org.xml.sax.Attributes;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.DefaultHandler;

public class TestSaxParser {

    public static void main(String[] args) throws ParserConfigurationException, SAXException, IOException {
        String xml = 
            "<content type=\"html\">\n" +
            "\n" +
            "    &lt;img alt=\"\" src=\"http://cdn2.sbnation.com/entry_photo_images/8767829/stranger-bad-robot-screencap_large.png\" /&gt;\n" +
            "\n" +
            "\n" +
            "     &lt;p&gt;Bad Robot, the production company founded by geek culture hitmaker J.J. Abrams (&lt;i&gt;Lost&lt;/i&gt;, &lt;i&gt;Fringe&lt;/i&gt;, &lt;i&gt;Star Trek: Into Darkness&lt;/i&gt;, &lt;i&gt;Alias&lt;/i&gt;,&amp;nbsp;etc.), has released a&amp;nbsp;&lt;a href=\"http://youtu.be/FWaAZCaQXdo\" target=\"_blank\"&gt;mysterious new trailer&lt;/a&gt; titled \"Stranger.\" The creepy and inscrutable video spot, posted by the official Bad Robot Twitter account this afternoon, features a starry sky; a long-haired, rope-bound man wandering along a desolate monochromatic shore line; and your garden variety, horrifying stitched-mouth person coming into focus. \"Men are erased and reborn,\" intones a narrator that sounds a little like Leonard Nimoy.&lt;/p&gt;\n" +
            "     &lt;p&gt;&lt;/p&gt;\n" +
            "\n" +
            "\n" +
            "\n" +
            "    </content>";

        MySaxHandler handler = new MySaxHandler();
        SAXParserFactory factory = SAXParserFactory.newInstance();
        SAXParser parser = factory.newSAXParser();        
        InputSource source = new InputSource(new StringReader(xml));
        parser.parse(source, handler);
    }

    private static class MySaxHandler extends DefaultHandler {
        private StringBuilder content = new StringBuilder();

        @Override
        public void startElement(String uri, String localName, String qName, Attributes attributes) throws SAXException {
            content.setLength(0);
        }

        @Override
        public void characters(char[] ch, int start, int length) throws SAXException {
            content.append(ch, start, length);
        }

        @Override
        public void endElement(String uri, String localName, String qName) throws SAXException {
            System.out.println(content.toString());
        }

    }    
}

輸出：

    <img alt="" src="http://cdn2.sbnation.com/entry_photo_images/8767829/stranger-bad-robot-screencap_large.png" />


     <p>Bad Robot, the production company founded by geek culture hitmaker J.J. Abrams (<i>Lost</i>, <i>Fringe</i>, <i>Star Trek: Into Darkness</i>, <i>Alias</i>,&nbsp;etc.), has released a&nbsp;<a href="http://youtu.be/FWaAZCaQXdo" target="_blank">mysterious new trailer</a> titled "Stranger." The creepy and inscrutable video spot, posted by the official Bad Robot Twitter account this afternoon, features a starry sky; a long-haired, rope-bound man wandering along a desolate monochromatic shore line; and your garden variety, horrifying stitched-mouth person coming into focus. "Men are erased and reborn," intones a narrator that sounds a little like Leonard Nimoy.</p>
     <p></p>