创建CDATA部分令人困惑

Question

我试图在描述字段中创建CDATA部分,但失败了.代码非常简单,但在生成的XML中没有出现CDATA部分!

Node de = document.createElement("description");
de.appendChild(document.createCDATASection(reportData.getIssue().getDescription() + "more]]>data"));
e.appendChild(de);

在结果XML中,我得到:

<description>Room #1128 has AD issues.more]]&gt;data</description>

我究竟做错了什么？!

Answer 1

该序列]]>终止CDATA部分,因此不能出现在CDATA部分中.

您的XML库正在通过放弃CDATA部分并使用实体来恢复具有特殊含义的字符来恢复.

由于<foo><![CDATA[Hello, world>]]></foo>和<foo>Hello, world&gt;</foo>是等价的,这是没有问题的(除非有人试图提供一个工具,不是一个XML解析器,其出路在于疯狂解析生成的XML).

Answer 2

您应该指定CDATA部分元素.

你可以这样做;

 transformer.setOutputProperty(OutputKeys.CDATA_SECTION_ELEMENTS, "tagName");

如果要指定多个CDATA节元素,请使用空格作为分隔符.

transformer.setOutputProperty(OutputKeys.CDATA_SECTION_ELEMENTS, "tagName1 tagName2");

完整代码

DocumentBuilderFactory docFactory = DocumentBuilderFactory.newInstance();
DocumentBuilder docBuilder = docFactory.newDocumentBuilder();

Document doc = docBuilder.newDocument();
Element rootElement = doc.createElement("catalog");
doc.appendChild(rootElement);

Element description = doc.createElement("description");
description.appendChild(doc.createCDATASection("/&(*/**SOME STRANGE DESCRIPTION**??Ü656*9/*9^+%3Ü?PÜ"));
rootElement.appendChild(description);

Element books = doc.createElement("books");
rootElement.appendChild(books);

Element book = doc.createElement("book");
books.appendChild(book);

Element author = doc.createElement("author");
author.appendChild(doc.createCDATASection("&/(&/(QNzxB5yiBibGj2MM ÇÖÇÇ"));
book.appendChild(author);

Element price = doc.createElement("price");
price.appendChild(doc.createTextNode("50.5"));
book.appendChild(price);

Element title = doc.createElement("title");
title.appendChild(doc.createTextNode("my book title"));
book.appendChild(title);

TransformerFactory transformerFactory = TransformerFactory.newInstance();
Transformer transformer = transformerFactory.newTransformer();
transformer.setOutputProperty(OutputKeys.METHOD, "xml");
transformer.setOutputProperty(OutputKeys.CDATA_SECTION_ELEMENTS, "description author descr");
transformer.setOutputProperty(OutputKeys.INDENT, "yes");

DOMSource source = new DOMSource(doc);

StreamResult result = new StreamResult(System.out);

transformer.transform(source, result);

结果将是这样的;

<?xml version="1.0" encoding="UTF-8"?>
<catalog>
   <description><![CDATA[/&(*/**SOME STRANGE DESCRIPTION**??Ü656*9/*9^+%3Ü?PÜ]]></description>
   <books>
      <book>
         <author><![CDATA[&/(&/(QNzxB5yiBibGj2MM ÇÖÇÇ]]></author>
         <price>50.5</price>
         <title>my book title</title>
      </book>
   </books>
</catalog>

如果我们想要应用您的确切样本(使用您的数据+"]]");

String someInfo = "example-info";
Element dscr = doc.createElement("descr");
dscr.appendChild(doc.createCDATASection(someInfo + "more]]>data"));
book.appendChild(dscr);

那么结果会是这样的;

    <?xml version="1.0" encoding="UTF-8"?>
    <catalog>
       <description><![CDATA[/&(*/**SOME STRANGE DESCRIPTION**??Ü656*9/*9^+%3Ü?PÜ]]></description>
       <books>
          <book>
             <author><![CDATA[&/(&/(QNzxB5yiBibGj2MM ÇÖÇÇ]]></author>
             <price>50.5</price>
             <title>my book title</title>
             <descr><![CDATA[example-infomore]]]]><![CDATA[>data]]></descr>
          </book>
       </books>
    </catalog>