e531. getting a dom element by id.txt

这里面包含了一百多个JAVA源文件

// Obtain an XML document; this method is implemented in
    // e510 The Quintessential Program to Create a DOM Document from an XML File
    Document doc = parseXmlFile("infilename.xml", true);
    
    // Retrieve the element using id
    Element element = doc.getElementById("key1");
    
    // Get the element's attribute
    String attrValue = element.getAttribute("value");  // value1

This is the sample input for the example: 
    <?xml version="1.0" encoding="UTF-8"?>
    <!DOCTYPE map [ <!ELEMENT map (entry*) >
                    <!ELEMENT entry EMPTY >
                    <!ATTLIST entry key   ID    #REQUIRED
                                    value CDATA "mydefault"> ]>
    <map>
        <entry key="key1" value="value1"/>
        <entry key="key2" />
    </map>

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