读取转义的引号作为xml的转义引用

问题描述

代码为：

  public class MyTest {
 public static void main（String [] args）{
 Document doc = XMLUtils.fileToDom（MyTest.xml）; //加载xml数据到DOM 
元素rootElement = doc.getDocumentElement（）; 
 NodeList nodes = rootElement.getChildNodes（）; 
 Node child1 = nodes.item（1）; 
 Node child2 = nodes.item（3）; 
 String str1 = child1.getTextContent（）; 
 String str2 = child2.getTextContent（）; 
 if（str1！= null）{
 System.out.println（str1.equals（str2））; 
} 
 System.out.println（）; 
 System.out.println（str1）; 
 System.out.println（str2）; 
} 
  

}

MyTest.xml

 < tests> 
< test name =1> ff1& quot< / test> 
< test name =2> ff1< / test> 
< / tests> 
  

结果：

  true 
 
 ff1
 ff1
  

所需结果：

  false 
 
 ff1& quot; 
 ff1
  

所以我需要区分这两种情况：报价是否被转义而不是。

请帮助。

提前谢谢。

PS XMLUtils的代码＃fileToDom（String filePath），一个来自XMLUtils类的代码片段：

  static {
 DocumentBuilderFactory dFactory = DocumentBuilderFactory.newInstance（）; 
 dFactory.setNamespaceAware（false）; 
 dFactory.setValidating（false）; 
 try {
 docNonValidatingBuilder = dFactory.newDocumentBuilder（）; 
} catch（ParserConfigurationException e）{
} 
} 
 
 public static DocumentBuilder getNonValidatingBuilder（）{
 return docNonValidatingBuilder; 
} 
 
 public static Document fileToDom（String filePath）{
 
 Document doc = getNonValidatingBuilder（）。newDocument（）; 
文件f = new File（filePath）; 
 if（！f.exists（））
 return doc; 
 
 try {
 Transformer transformer = TransformerFactory.newInstance（）。newTransformer（）; 
 DOMResult result = new DOMResult（doc）; 
 StreamSource source = new StreamSource（f）; 
 transformer.transform（source，result）; 
} catch（Exception e）{
 return doc; 
} 
 
 return doc; 
 
} 
  

解决方案

看看apache xerces的源代码，并提出我的解决方案（但它是猴子补丁）。
我写了简单的类

 打包a; 
 import java.io.IOException; 
 import org.apache.xerces.impl.XMLDocumentScannerImpl; 
 import org.apache.xerces.parsers.NonValidatingConfiguration; 
 import org.apache.xerces.xni.XMLString; 
 import org.apache.xerces.xni.XNIException; 
 import org.apache.xerces.xni.parser.XMLComponent; 
 
 public class MyConfig extends NonValidatingConfiguration {
 
 private MyScanner myScanner; 
 
 @Override 
 @SuppressWarnings（unchecked）
 protected void configurePipeline（）{
 if（myScanner == null）{
 myScanner = new MyScanner（）; 
 addComponent（（XMLComponent）myScanner）; 
} 
 super.fProperties.put（DOCUMENT_SCANNER，myScanner）; 
 super.fScanner = myScanner; 
 super.fScanner.setDocumentHandler（this.fDocumentHandler）; 
 super.fLastComponent = fScanner; 
} 
 
私有静态类MyScanner扩展XMLDocumentScannerImpl {
 
 @Override 
 protected void scanEntityReference（）throws IOException，XNIException {
 // name 
 String name = super.fEntityScanner.scanName（）; 
 if（name == null）{
 reportFatalError（NameRequiredInReference，null）; 
 return; 
} 
 
 super.fDocumentHandler.characters（new XMLString（（&+ name +;）
 .toCharArray（），0，name.length（） + 2），null）; 
 
 // end 
 if（！super.fEntityScanner.skipChar（';'））{
 reportFatalError（SemicolonRequiredInReference，
 new Object [] {name }）; 
} 
 fMarkupDepth--; 
} 
} 
 
} 
  

在开始解析前仅添加下一行到您的主要方法

  System.setProperty（
org.apache.xerces .xni.parser.XMLParserConfiguration，
a.MyConfig）; 
  

您将有预期的结果：

  false 
 
 ff1& quot; 
 ff1
  

I load xml file into DOM model and analyze it.

The code for that is:

public class MyTest {
public static void main(String[] args) {        
    Document doc = XMLUtils.fileToDom("MyTest.xml");//Loads xml data to DOM
    Element rootElement = doc.getDocumentElement();
    NodeList nodes = rootElement.getChildNodes();
    Node child1 = nodes.item(1);
    Node child2 = nodes.item(3);
    String str1 = child1.getTextContent();
    String str2 = child2.getTextContent();      
    if(str1 != null){
        System.out.println(str1.equals(str2));
    }
    System.out.println();
    System.out.println(str1);
    System.out.println(str2);
}   

}

MyTest.xml

<tests>
   <test name="1">ff1 &quot;</test>
   <test name="2">ff1 "</test>
</tests>

Result:

true

ff1 "
ff1 "

Desired result:

false

ff1 "
ff1 "

So I need to distinguish these two cases: when the quote is escaped and is not.

Please help.

Thank you in advance.

P.S. The code for XMLUtils#fileToDom(String filePath), a snippet from XMLUtils class:

static {
    DocumentBuilderFactory dFactory = DocumentBuilderFactory.newInstance();
    dFactory.setNamespaceAware(false);
    dFactory.setValidating(false);
    try {
        docNonValidatingBuilder = dFactory.newDocumentBuilder();
    } catch (ParserConfigurationException e) {
    }
}

public static DocumentBuilder getNonValidatingBuilder() {
    return docNonValidatingBuilder;
}

public static Document fileToDom(String filePath) {

    Document doc = getNonValidatingBuilder().newDocument();
    File f = new File(filePath);
    if(!f.exists())
        return doc;

    try {
        Transformer transformer = TransformerFactory.newInstance().newTransformer();
        DOMResult result = new DOMResult(doc);
        StreamSource source = new StreamSource(f);
        transformer.transform(source, result);
    } catch (Exception e) {
        return doc;
    }

    return doc;

}

解决方案

I've take a look on source code of apache xerces and propose my solution (but it is monkey patch).I've wrote simple class

package a;
import java.io.IOException;
import org.apache.xerces.impl.XMLDocumentScannerImpl;
import org.apache.xerces.parsers.NonValidatingConfiguration;
import org.apache.xerces.xni.XMLString;
import org.apache.xerces.xni.XNIException;
import org.apache.xerces.xni.parser.XMLComponent;

public class MyConfig extends NonValidatingConfiguration {

    private MyScanner myScanner;

    @Override
    @SuppressWarnings("unchecked")
    protected void configurePipeline() {
        if (myScanner == null) {
            myScanner = new MyScanner();
            addComponent((XMLComponent) myScanner);
        }
        super.fProperties.put(DOCUMENT_SCANNER, myScanner);
        super.fScanner = myScanner;
        super.fScanner.setDocumentHandler(this.fDocumentHandler);
        super.fLastComponent = fScanner;
    }

    private static class MyScanner extends XMLDocumentScannerImpl {

        @Override
        protected void scanEntityReference() throws IOException, XNIException {
            // name
            String name = super.fEntityScanner.scanName();
            if (name == null) {
                reportFatalError("NameRequiredInReference", null);
                return;
            }

            super.fDocumentHandler.characters(new XMLString(("&" + name + ";")
                .toCharArray(), 0, name.length() + 2), null);

            // end
            if (!super.fEntityScanner.skipChar(';')) {
                reportFatalError("SemicolonRequiredInReference",
                        new Object[] { name });
            }
            fMarkupDepth--;
        }
    }

}

You need to add only next line to your main method before start parsing

System.setProperty(
            "org.apache.xerces.xni.parser.XMLParserConfiguration",
            "a.MyConfig");

And you will have expected result:

false

ff1 "
ff1 "

这篇关于读取转义的引号作为xml的转义引用的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！