How to switch bewteen differenct JAXP？

最新推荐文章于 2022-11-22 19:51:16 发布

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最新推荐文章于 2022-11-22 19:51:16 发布

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分类专栏： J2SE&J2EE 文章标签： Oracle Linux Apache XML Windows

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本文介绍如何在Sun JDK中切换JAXP的实现，包括使用Oracle JAXP和Apache Xerces JAXP的方法。同时探讨了在不同JAXP实现下，CDATA段在XML文件中存储原始数据的行为差异。

How to switch bewteen differenct JAXP

1 JAXP in Sun JDK uses the implementation from Apache Xerces by default. But we can change it by setting the system properties.
         1.1 How to use the Oracle JAXP implementation?
                 1.1.1 Find the jar - JDEVELOPER_HOME/lib/xmlparserv2.jar
                 1.1.2 Put the jar in the classpath.
                 1.1.3 Set the system variants in the JVM startup.
                        -Djavax.xml.transform.TransformerFactory=oracle.xml.jaxp.JXSAXTransformerFactory
                        -Djavax.xml.parsers.SAXParserFactory=oracle.xml.jaxp.JXSAXParserFactory
                        -Djavax.xml.parsers.DocumentBuilderFactory=oracle.xml.jaxp.JXDocumentBuilderFactory
         1.2 How to use the apache xerces JAXP implementation?
                -Djavax.xml.transform.TransformerFactory=com.sun.org.apache.xalan.internal.xsltc.trax.TransformerFactoryImpl
                -Djavax.xml.parsers.SAXParserFactory=com.sun.org.apache.xerces.internal.jaxp.SAXParserFactoryImpl
                -Djavax.xml.parsers.DocumentBuilderFactory=com.sun.org.apache.xerces.internal.jaxp.DocumentBuilderFactoryImpl

2 How to use the CDATA section to store the raw data in xml file? With the CDATA section, parser or builder encapsulate the raw data within <![CDATA[ and ]] theorially. But for different implementations, it leads to differenct results. Sometimes it decides if it should encapsulate the raw data based on if it is necesary. Sometimes the raw data are legal from the start, so it ignores it. Sometimes not.
        2.1 Program:
                Element eTemp = document.createElement("value");
                String sValue = "test-legal";
                Node nodeValue = document.createCDATASection(vlaue);
                eTemp.appendChild(nodeValue);
        2.2 Result:

                Apache JAXP Impl - Windows
                <![CDATA[test-legal]]

                Apache JAXP Impl - Linux
                test-legal

                Oracle JAXP Impl - Windows
                test-legal

                Oracle JAXP Impl - Linux
                test-legal

        2.3 Program:
                Element eTemp = document.createElement("value");
                String sValue = "test-legal<><><>";
                Node nodeValue = document.createCDATASection(vlaue);
                eTemp.appendChild(nodeValue);
        2.4 Result:

                Apache JAXP Impl - Windows
                <![CDATA[test-legal<><><>]]

                Apache JAXP Impl - Linux
                <![CDATA[test-legal<><><>]]

                Oracle JAXP Impl - Windows
                <![CDATA[test-legal<><><>]]

                Oracle JAXP Impl - Linux
                <![CDATA[test-legal<><><>]]