RDF文件的解析

开发过程中的XML解析有很多种方式

一次偶然的机会，碰到RDF格式的，和传统的xml有点区别，可能有他自己的独特之处

普通的xml解析可能无效，在网上搜索了下，建议用jena解析

可以在主页下载：http://jena.sourceforge.net/ 当前版本为 jena-2.6.4

先看下RDF的大致格式

<?xml version="1.0"?>
<rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
 xmlns:prf="http://www.wapforum.org/profiles/UAPROF/ccppschema-20010430#">
 <rdf:Description rdf:about="Nokia3330">
  <prf:component>
   <rdf:Description rdf:about="HardwarePlatform">
    <rdf:type
     rdf:resource="http://www.wapforum.org/profiles/UAPROF/ccppschema-20010430#HardwarePlatform" />
    <prf:Keyboard>PhoneKeypad</prf:Keyboard>
    <prf:NumberOfSoftKeys>1</prf:NumberOfSoftKeys>
    <prf:ScreenSize>84x30</prf:ScreenSize>
    <prf:ScreenSizeChar>10x3</prf:ScreenSizeChar>
    <prf:StandardFontProportional>
     Yes
    </prf:StandardFontProportional>
    <prf:Vendor>Nokia</prf:Vendor>
    <prf:Model>3330</prf:Model>
    <prf:TextInputCapable>Yes</prf:TextInputCapable>
   </rdf:Description>
  </prf:component>

 </rdf:Description>
</rdf:RDF>

解析部分代码

/**
     * 
     * 解析RDF 文件
     * 
     * @param inputFile
     * @author
     * @date 2011-9-1 上午09:17:16
     */
    private void parseRdfFile(File inputFile)
    {
        try
        {

            Model model = ModelFactory.createDefaultModel();
            // use the FileManager to find the input file
            InputStream in = new FileInputStream(inputFile);
            if (in == null)
            {
                throw new IllegalArgumentException("File:  not found");
            }
            model.read(new InputStreamReader(in), "");
            StmtIterator stmtIt = model.listStatements();

            String key1 = "";
            String key2 = "";
            String value = "";

            while (stmtIt.hasNext())
            {

                Statement stmt = stmtIt.nextStatement();
                // resource
                key1 = stmt.getSubject().getURI();

                if (null == key1)
                {
                    continue;
                }

                // Property
                key2 = stmt.getPredicate().getLocalName();

                // RDFNode
                if (stmt.getBag().size() > 0)
                {
                    value = getBagStr(stmt.getBag());
                } else
                {
                    value = stmt.getObject().toString();
                }

                // key1
                logger.trace("resource:" + key1);

                // key2
                logger.trace("Property = " + key2);

                // value
                logger.trace("RDFNode/bag = " + value);

               
            }

        } catch (Exception e)
        {
            logger.error("parseRdfFile Failed", e);
        }
    }

    /**
     * 
     * 获取bag 的值
     * 
     * @param bags
     * @return
     * @author
     * @date 2011-9-1 上午07:26:51
     */
    private String getBagStr(Bag bags)
    {
        if (null == bags || bags.size() == 0)
        {
            return "";
        }
        StringBuilder sb = new StringBuilder();
        NodeIterator bagIt = bags.iterator();
        if (bagIt.hasNext())
        {
            while (bagIt.hasNext())
            {
                sb.append(bagIt.next());
                sb.append(MARK_SEP);
            }
        }

        return sb.substring(0, sb.length() - 1 - MARK_SEP.length());
    }

RDF文件的解析

浏览过的版块