如何使用Java查询Xml文件

Question

I am having Xml file which contains about 50 Tables <tables></tables> . All tables are linked to each other.

<table name="Information">
        <row>
            <field name="aggregateMID">123</field>
            <field name="MID">345</field>
            <field name="sequenceNum">1</field>
        </row>
        <row>
            <field name="aggregateMID">123</field>
            <field name="MID">346</field>
            <field name="sequenceNum">2</field>
        </row>
</table>

Can it be possible to query xml according to linking and fetch all required information? Please suggest what methods and API's will help me to do this job.

Answer 1

You can parse the XML file using a Java DOM Parser.

you can try this.

try {
    Document document = builder.parse(new FileInputStream("c:\\table.xml"));
} catch (SAXException e) {
    e.printStackTrace();
} catch (IOException e) {
    e.printStackTrace();
}

You can refer these links: http://viralpatel.net/blogs/java-xml-xpath-tutorial-parse-xml/

http://www.journaldev.com/1194/java-xpath-tutorial-with-examples

Answer 2

I assume you have good reason not to use XPATH/XSLT directly.

If you want sql like queries, may be you can take a look at XQUERY

Also, please remember that Xquery doesn't come with JAVA by dafault. You have to download a suitable implementation jar from internet

Answer 3

答案可能是XQuery，但是直到看到问题我们才能确定。