testhssfdateutil.java

Office格式转换代码

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package org.apache.poi.hssf.usermodel;

import junit.framework.TestCase;

import java.util.Date;
import java.util.GregorianCalendar;

/**
 * Class TestHSSFDateUtil
 *
 *
 * @author
 * @author  Dan Sherman (dsherman at isisph.com)
 * @version %I%, %G%
 */

public class TestHSSFDateUtil
    extends TestCase
{
    public TestHSSFDateUtil(String s)
    {
        super(s);
    }

    /**
     * Checks the date conversion functions in the HSSFDateUtil class.
     */

    public void testDateConversion()
        throws Exception
    {

        // Iteratating over the hours exposes any rounding issues.
        for (int hour = 0; hour < 23; hour++)
        {
            GregorianCalendar date      = new GregorianCalendar(2002, 0, 1,
                                              hour, 1, 1);
            double            excelDate =
                HSSFDateUtil.getExcelDate(date.getTime());

            assertEquals("Checking hour = " + hour, date.getTime().getTime(),
                         HSSFDateUtil.getJavaDate(excelDate).getTime());
        }
        
        // check 1900 and 1904 date windowing conversions
        double excelDate = 36526.0;
                 // with 1900 windowing, excelDate is Jan. 1, 2000
                 // with 1904 windowing, excelDate is Jan. 2, 2004
        GregorianCalendar cal = new GregorianCalendar(2000,0,1); // Jan. 1, 2000
        Date dateIf1900 = cal.getTime();
        cal.add(GregorianCalendar.YEAR,4); // now Jan. 1, 2004
        cal.add(GregorianCalendar.DATE,1); // now Jan. 2, 2004
        Date dateIf1904 = cal.getTime();
        // 1900 windowing
        assertEquals("Checking 1900 Date Windowing",
                        dateIf1900.getTime(),
                           HSSFDateUtil.getJavaDate(excelDate,false).getTime());
        // 1904 windowing
        assertEquals("Checking 1904 Date Windowing",
                        dateIf1904.getTime(),
                           HSSFDateUtil.getJavaDate(excelDate,true).getTime());
    }
}