elementbyidtest.java

解决如何把XML应用到JAVA里问题

/*
 * Copyright 2001-2005 (C) MetaStuff, Ltd. All Rights Reserved.
 *
 * This software is open source.
 * See the bottom of this file for the licence.
 */

package org.dom4j;

import junit.textui.TestRunner;

/**
 * Tests the elementByID() method
 * 
 * @author <a href="mailto:[e-mail]">James Strachan </a>
 * @version $Revision: 1.4 $
 */
public class ElementByIDTest extends AbstractTestCase {
    /** Input XML file to read */
    protected static final String INPUT_XML_FILE = "xml/test/elementByID.xml";

    public static void main(String[] args) {
        TestRunner.run(ElementByIDTest.class);
    }

    // Test case(s)
    // -------------------------------------------------------------------------
    public void testElementByID() throws Exception {
        String id = "message";
        Document document = getDocument(INPUT_XML_FILE);

        // test XPath
        Element element = (Element) document.selectSingleNode("//*[@ID='" + id
                + "']");
        assertTrue("Found element by ID: " + id, element != null);
        assertEquals("ID is equal", id, element.attributeValue("ID"));

        // test with elementByID
        element = document.elementByID(id);

        assertTrue("Found element by ID: " + id, element != null);
        assertEquals("ID is equal", id, element.attributeValue("ID"));

        log("Found element: " + element.getText());

        element = document.elementByID("DoesNotExist");

        assertTrue("Found no element", element == null);
    }
}

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 * 
 * Copyright 2001-2005 (C) MetaStuff, Ltd. All Rights Reserved.
 */