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From ye...@apache.org
Subject svn commit: r1301923 - in /poi/trunk/src: documentation/content/xdocs/status.xml java/org/apache/poi/ss/util/DateFormatConverter.java testcases/org/apache/poi/ss/util/TestDateFormatConverter.java
Date Sat, 17 Mar 2012 12:16:45 GMT
Author: yegor
Date: Sat Mar 17 12:16:45 2012
New Revision: 1301923

URL: http://svn.apache.org/viewvc?rev=1301923&view=rev
Log:
Bugzilla >52928 - DateFormatConverter: an utility to convert instances of java.text.DateFormat
to Excel format patterns

Added:
    poi/trunk/src/java/org/apache/poi/ss/util/DateFormatConverter.java
    poi/trunk/src/testcases/org/apache/poi/ss/util/TestDateFormatConverter.java
Modified:
    poi/trunk/src/documentation/content/xdocs/status.xml

Modified: poi/trunk/src/documentation/content/xdocs/status.xml
URL: http://svn.apache.org/viewvc/poi/trunk/src/documentation/content/xdocs/status.xml?rev=1301923&r1=1301922&r2=1301923&view=diff
==============================================================================
--- poi/trunk/src/documentation/content/xdocs/status.xml (original)
+++ poi/trunk/src/documentation/content/xdocs/status.xml Sat Mar 17 12:16:45 2012
@@ -34,6 +34,7 @@
 
     <changes>
         <release version="3.8-beta6" date="2012-??-??">
+           <action dev="poi-developers" type="add">52928 - DateFormatConverter: an
utility to convert instances of java.text.DateFormat to Excel format patterns</action>
            <action dev="poi-developers" type="fix">52895 - show SSTIndex instead of
XFIndex in LabelSSTRecord.toString()</action>
            <action dev="poi-developers" type="fix">52835 - Tolerate missing Count and
UniqueCount attributes when parsing shared strings table in XSSF eventusermodel</action>
            <action dev="poi-developers" type="add">52818 - Added implementation for
RANK()</action>

Added: poi/trunk/src/java/org/apache/poi/ss/util/DateFormatConverter.java
URL: http://svn.apache.org/viewvc/poi/trunk/src/java/org/apache/poi/ss/util/DateFormatConverter.java?rev=1301923&view=auto
==============================================================================
--- poi/trunk/src/java/org/apache/poi/ss/util/DateFormatConverter.java (added)
+++ poi/trunk/src/java/org/apache/poi/ss/util/DateFormatConverter.java Sat Mar 17 12:16:45
2012
@@ -0,0 +1,426 @@
+/* ====================================================================
+   Licensed to the Apache Software Foundation (ASF) under one or more
+   contributor license agreements.  See the NOTICE file distributed with
+   this work for additional information regarding copyright ownership.
+   The ASF licenses this file to You under the Apache License, Version 2.0
+   (the "License"); you may not use this file except in compliance with
+   the License.  You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+==================================================================== */
+package org.apache.poi.ss.util;
+
+import java.text.DateFormat;
+import java.text.SimpleDateFormat;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Locale;
+import java.util.Map;
+
+/**
+ *  Convert java DateFormat patterns into Excel custom number formats.
+ *  For example, to format a date in excel using the "dd MMMM, yyyy" pattern and Japanese
+ *  locale, use the following code:
+ *
+ *  <pre><code>
+ *      // returns "[$-0411]dd MMMM, yyyy;@" where the [$-0411] prefix tells Excel to use
the Japanese locale
+ *      String excelFormatPattern = DateFormatConverter.convert(Locale.JAPANESE, "dd MMMM,
yyyy");
+ *
+ *      CellStyle cellStyle = workbook.createCellStyle();
+ *
+ *      DataFormat poiFormat = workbook.createDataFormat();
+ *      cellStyle.setDataFormat(poiFormat.getFormat(excelFormatPattern));
+ *      cell.setCellValue(new Date());
+ *      cell.setCellStyle(cellStyle);  // formats date as '2012\u5e743\u670817\u65e5'
+ *
+ *  </code></pre>
+ *
+ *
+ */
+public class DateFormatConverter  {
+	
+	public static class DateFormatTokenizer {
+		String format;
+		int pos;
+		
+		public DateFormatTokenizer(String format) {
+			this.format = format;
+		}
+		
+		public String getNextToken() {
+			if( pos >= format.length() ) {
+				return null;
+			}
+			int subStart = pos;
+			char curChar = format.charAt(pos);
+			++pos;
+			if( curChar == '\'' ) {
+				while( ( pos < format.length() ) && ( ( curChar = format.charAt(pos) ) !=
'\'' ) ) {
+					++pos;
+				}
+				if( pos < format.length() ) {
+					++pos;
+				}
+			} else {
+				char activeChar = curChar;
+				while( ( pos < format.length() ) && ( ( curChar = format.charAt(pos) ) ==
activeChar ) ) {
+					++pos;
+				}
+			}
+			return format.substring(subStart,pos);
+		}
+		
+		public static String[] tokenize( String format ) {
+			List<String> result = new ArrayList<String>();
+			
+			DateFormatTokenizer tokenizer = new DateFormatTokenizer(format);
+			String token;
+			while( ( token = tokenizer.getNextToken() ) != null ) {
+				result.add(token);
+			}
+			
+			return result.toArray(new String[0]);
+		}
+		
+		public String toString() {
+			StringBuilder result = new StringBuilder();
+			
+			DateFormatTokenizer tokenizer = new DateFormatTokenizer(format);
+			String token;
+			while( ( token = tokenizer.getNextToken() ) != null ) {
+				if( result.length() > 0 ) {
+					result.append( ", " );
+				}
+				result.append("[").append(token).append("]");
+			}
+			
+			return result.toString();
+		}		
+	}		
+	
+	private static Map<String,String> tokenConversions = prepareTokenConversions();
+	private static Map<String,String> localePrefixes = prepareLocalePrefixes();
+	
+	private static Map<String,String> prepareTokenConversions() {
+		Map<String,String> result = new HashMap<String,String>();
+		
+		result.put( "EEEE", "dddd" );
+		result.put( "EEE", "ddd" );
+		result.put( "EE", "ddd" );
+		result.put( "E", "d" );
+		result.put( "Z", "" );
+		result.put( "z", "" );
+		result.put( "a", "am/pm" );
+		result.put( "A", "AM/PM" );
+		result.put( "K", "H" );
+		result.put( "KK", "HH" );
+		result.put( "k", "h" );
+		result.put( "kk", "hh" );
+		result.put( "S", "0" );
+		result.put( "SS", "00" );
+		result.put( "SSS", "000" );
+		
+		return result;
+	}
+	
+	private static Map<String,String> prepareLocalePrefixes() {
+		Map<String,String> result = new HashMap<String,String>();
+		
+		result.put( "af", "[$-0436]" );
+		result.put( "am", "[$-45E]" );
+		result.put( "ar_ae", "[$-3801]" );
+		result.put( "ar_bh", "[$-3C01]" );
+		result.put( "ar_dz", "[$-1401]" );
+		result.put( "ar_eg", "[$-C01]" );
+		result.put( "ar_iq", "[$-0801]" );
+		result.put( "ar_jo", "[$-2C01]" );
+		result.put( "ar_kw", "[$-3401]" );
+		result.put( "ar_lb", "[$-3001]" );
+		result.put( "ar_ly", "[$-1001]" );
+		result.put( "ar_ma", "[$-1801]" );
+		result.put( "ar_om", "[$-2001]" );
+		result.put( "ar_qa", "[$-4001]" );
+		result.put( "ar_sa", "[$-0401]" );
+		result.put( "ar_sy", "[$-2801]" );
+		result.put( "ar_tn", "[$-1C01]" );
+		result.put( "ar_ye", "[$-2401]" );
+		result.put( "as", "[$-44D]" );
+		result.put( "az_az", "[$-82C]" );
+		result.put( "az_az", "[$-42C]" );
+		result.put( "be", "[$-0423]" );
+		result.put( "bg", "[$-0402]" );
+		result.put( "bn", "[$-0845]" );
+		result.put( "bn", "[$-0445]" );
+		result.put( "bo", "[$-0451]" );
+		result.put( "bs", "[$-141A]" );
+		result.put( "ca", "[$-0403]" );
+		result.put( "cs", "[$-0405]" );
+		result.put( "cy", "[$-0452]" );
+		result.put( "da", "[$-0406]" );
+		result.put( "de_at", "[$-C07]" );
+		result.put( "de_ch", "[$-0807]" );
+		result.put( "de_de", "[$-0407]" );
+		result.put( "de_li", "[$-1407]" );
+		result.put( "de_lu", "[$-1007]" );
+		result.put( "dv", "[$-0465]" );
+		result.put( "el", "[$-0408]" );
+		result.put( "en_au", "[$-C09]" );
+		result.put( "en_bz", "[$-2809]" );
+		result.put( "en_ca", "[$-1009]" );
+		result.put( "en_cb", "[$-2409]" );
+		result.put( "en_gb", "[$-0809]" );
+		result.put( "en_ie", "[$-1809]" );
+		result.put( "en_in", "[$-4009]" );
+		result.put( "en_jm", "[$-2009]" );
+		result.put( "en_nz", "[$-1409]" );
+		result.put( "en_ph", "[$-3409]" );
+		result.put( "en_tt", "[$-2C09]" );
+		result.put( "en_us", "[$-0409]" );
+		result.put( "en_za", "[$-1C09]" );
+		result.put( "es_ar", "[$-2C0A]" );
+		result.put( "es_bo", "[$-400A]" );
+		result.put( "es_cl", "[$-340A]" );
+		result.put( "es_co", "[$-240A]" );
+		result.put( "es_cr", "[$-140A]" );
+		result.put( "es_do", "[$-1C0A]" );
+		result.put( "es_ec", "[$-300A]" );
+		result.put( "es_es", "[$-40A]" );
+		result.put( "es_gt", "[$-100A]" );
+		result.put( "es_hn", "[$-480A]" );
+		result.put( "es_mx", "[$-80A]" );
+		result.put( "es_ni", "[$-4C0A]" );
+		result.put( "es_pa", "[$-180A]" );
+		result.put( "es_pe", "[$-280A]" );
+		result.put( "es_pr", "[$-500A]" );
+		result.put( "es_py", "[$-3C0A]" );
+		result.put( "es_sv", "[$-440A]" );
+		result.put( "es_uy", "[$-380A]" );
+		result.put( "es_ve", "[$-200A]" );
+		result.put( "et", "[$-0425]" );
+		result.put( "eu", "[$-42D]" );
+		result.put( "fa", "[$-0429]" );
+		result.put( "fi", "[$-40B]" );
+		result.put( "fo", "[$-0438]" );
+		result.put( "fr_be", "[$-80C]" );
+		result.put( "fr_ca", "[$-C0C]" );
+		result.put( "fr_ch", "[$-100C]" );
+		result.put( "fr_fr", "[$-40C]" );
+		result.put( "fr_lu", "[$-140C]" );
+		result.put( "gd", "[$-43C]" );
+		result.put( "gd_ie", "[$-83C]" );
+		result.put( "gn", "[$-0474]" );
+		result.put( "gu", "[$-0447]" );
+		result.put( "he", "[$-40D]" );
+		result.put( "hi", "[$-0439]" );
+		result.put( "hr", "[$-41A]" );
+		result.put( "hu", "[$-40E]" );
+		result.put( "hy", "[$-42B]" );
+		result.put( "id", "[$-0421]" );
+		result.put( "is", "[$-40F]" );
+		result.put( "it_ch", "[$-0810]" );
+		result.put( "it_it", "[$-0410]" );
+		result.put( "ja", "[$-0411]" );
+		result.put( "kk", "[$-43F]" );
+		result.put( "km", "[$-0453]" );
+		result.put( "kn", "[$-44B]" );
+		result.put( "ko", "[$-0412]" );
+		result.put( "ks", "[$-0460]" );
+		result.put( "la", "[$-0476]" );
+		result.put( "lo", "[$-0454]" );
+		result.put( "lt", "[$-0427]" );
+		result.put( "lv", "[$-0426]" );
+		result.put( "mi", "[$-0481]" );
+		result.put( "mk", "[$-42F]" );
+		result.put( "ml", "[$-44C]" );
+		result.put( "mn", "[$-0850]" );
+		result.put( "mn", "[$-0450]" );
+		result.put( "mr", "[$-44E]" );
+		result.put( "ms_bn", "[$-83E]" );
+		result.put( "ms_my", "[$-43E]" );
+		result.put( "mt", "[$-43A]" );
+		result.put( "my", "[$-0455]" );
+		result.put( "ne", "[$-0461]" );
+		result.put( "nl_be", "[$-0813]" );
+		result.put( "nl_nl", "[$-0413]" );
+		result.put( "no_no", "[$-0814]" );
+		result.put( "or", "[$-0448]" );
+		result.put( "pa", "[$-0446]" );
+		result.put( "pl", "[$-0415]" );
+		result.put( "pt_br", "[$-0416]" );
+		result.put( "pt_pt", "[$-0816]" );
+		result.put( "rm", "[$-0417]" );
+		result.put( "ro", "[$-0418]" );
+		result.put( "ro_mo", "[$-0818]" );
+		result.put( "ru", "[$-0419]" );
+		result.put( "ru_mo", "[$-0819]" );
+		result.put( "sa", "[$-44F]" );
+		result.put( "sb", "[$-42E]" );
+		result.put( "sd", "[$-0459]" );
+		result.put( "si", "[$-45B]" );
+		result.put( "sk", "[$-41B]" );
+		result.put( "sl", "[$-0424]" );
+		result.put( "so", "[$-0477]" );
+		result.put( "sq", "[$-41C]" );
+		result.put( "sr_sp", "[$-C1A]" );
+		result.put( "sr_sp", "[$-81A]" );
+		result.put( "sv_fi", "[$-81D]" );
+		result.put( "sv_se", "[$-41D]" );
+		result.put( "sw", "[$-0441]" );
+		result.put( "ta", "[$-0449]" );
+		result.put( "te", "[$-44A]" );
+		result.put( "tg", "[$-0428]" );
+		result.put( "th", "[$-41E]" );
+		result.put( "tk", "[$-0442]" );
+		result.put( "tn", "[$-0432]" );
+		result.put( "tr", "[$-41F]" );
+		result.put( "ts", "[$-0431]" );
+		result.put( "tt", "[$-0444]" );
+		result.put( "uk", "[$-0422]" );
+		result.put( "ur", "[$-0420]" );
+		result.put( "UTF_8", "[$-0000]" );
+		result.put( "uz_uz", "[$-0843]" );
+		result.put( "uz_uz", "[$-0443]" );
+		result.put( "vi", "[$-42A]" );
+		result.put( "xh", "[$-0434]" );
+		result.put( "yi", "[$-43D]" );
+		result.put( "zh_cn", "[$-0804]" );
+		result.put( "zh_hk", "[$-C04]" );
+		result.put( "zh_mo", "[$-1404]" );
+		result.put( "zh_sg", "[$-1004]" );
+		result.put( "zh_tw", "[$-0404]" );
+		result.put( "zu", "[$-0435]" );
+
+		result.put( "ar", "[$-0401]" );
+		result.put( "bn", "[$-0845]" );
+		result.put( "de", "[$-0407]" );
+		result.put( "en", "[$-0409]" );
+		result.put( "es", "[$-40A]" );
+		result.put( "fr", "[$-40C]" );
+		result.put( "it", "[$-0410]" );
+		result.put( "ms", "[$-43E]" );
+		result.put( "nl", "[$-0413]" );
+		result.put( "nn", "[$-0814]" );
+		result.put( "no", "[$-0414]" );
+		result.put( "pt", "[$-0816]" );
+		result.put( "sr", "[$-C1A]" );
+		result.put( "sv", "[$-41D]" );
+		result.put( "uz", "[$-0843]" );
+		result.put( "zh", "[$-0804]" );
+		
+		result.put( "ga", "[$-43C]" );
+		result.put( "ga_ie", "[$-83C]" );
+		result.put( "in", "[$-0421]" );
+		result.put( "iw", "[$-40D]" );
+		
+		return result;
+	}
+	
+	public static String getPrefixForLocale( Locale locale ) {
+		String localeString = locale.toString().toLowerCase();
+		String result = localePrefixes.get( localeString );
+		if( result == null ) {
+			result = localePrefixes.get( localeString.substring( 0, 2 ) );
+			if( result ==  null ) {
+				Locale parentLocale = new Locale(localeString.substring( 0, 2 ));
+				System.out.println( "Unable to find prefix for " + locale + "(" + locale.getDisplayName()
+ ") or " 
+						+ localeString.substring( 0, 2 ) + "(" + parentLocale.getDisplayName() + ")" );
+				return "";
+			}
+		}
+		return result;
+	}
+
+    public static String convert( Locale locale, DateFormat df ) {
+        String ptrn = ((SimpleDateFormat)df).toPattern();
+        return convert(locale, ptrn);
+    }
+
+    public static String convert( Locale locale, String format ) {
+		StringBuilder result = new StringBuilder();
+		
+		result.append(getPrefixForLocale(locale));
+		DateFormatTokenizer tokenizer = new DateFormatTokenizer(format);
+		String token;
+		while( ( token = tokenizer.getNextToken() ) != null ) {
+			if( token.startsWith("'") ) {
+				result.append( token.replaceAll("'", "\"") );
+			} else if( ! Character.isLetter( token.charAt( 0 ) ) ) {
+				result.append( token );
+			} else {
+				// It's a code, translate it if necessary
+				String mappedToken = tokenConversions.get(token);
+				result.append( mappedToken == null ? token : mappedToken );
+			}
+		}
+        result.append(";@");
+		return result.toString().trim();
+	}
+	
+	public static String getJavaDatePattern(int style, Locale locale) {
+    	DateFormat df = DateFormat.getDateInstance(style, locale);
+    	if( df instanceof SimpleDateFormat ) {
+    		return ((SimpleDateFormat)df).toPattern();
+    	} else {
+    		switch( style ) {
+    		case DateFormat.SHORT:
+    			return "d/MM/yy";
+    		case DateFormat.MEDIUM:
+    			return "MMM d, yyyy";
+    		case DateFormat.LONG:
+    			return "MMMM d, yyyy";
+    		case DateFormat.FULL:
+    			return "dddd, MMMM d, yyyy";
+    		default:
+    			return "MMM d, yyyy";
+    		}
+    	}
+	}
+	
+	public static String getJavaTimePattern(int style, Locale locale) {
+    	DateFormat df = DateFormat.getTimeInstance(style, locale);
+    	if( df instanceof SimpleDateFormat ) {
+    		return ((SimpleDateFormat)df).toPattern();
+    	} else {
+    		switch( style ) {
+    		case DateFormat.SHORT:
+    			return "h:mm a";
+    		case DateFormat.MEDIUM:
+    			return "h:mm:ss a";
+    		case DateFormat.LONG:
+    			return "h:mm:ss a";
+    		case DateFormat.FULL:
+    			return "h:mm:ss a";
+    		default:
+    			return "h:mm:ss a";
+    		}
+    	}
+	}
+	
+	public static String getJavaDateTimePattern(int style, Locale locale) {
+    	DateFormat df = DateFormat.getDateTimeInstance(style, style, locale);
+    	if( df instanceof SimpleDateFormat ) {
+    		return ((SimpleDateFormat)df).toPattern();
+    	} else {
+    		switch( style ) {
+    		case DateFormat.SHORT:
+    			return "M/d/yy h:mm a";
+    		case DateFormat.MEDIUM:
+    			return "MMM d, yyyy h:mm:ss a";
+    		case DateFormat.LONG:
+    			return "MMMM d, yyyy h:mm:ss a";
+    		case DateFormat.FULL:
+    			return "dddd, MMMM d, yyyy h:mm:ss a";
+    		default:
+    			return "MMM d, yyyy h:mm:ss a";
+    		}
+    	}
+	}
+		
+}

Added: poi/trunk/src/testcases/org/apache/poi/ss/util/TestDateFormatConverter.java
URL: http://svn.apache.org/viewvc/poi/trunk/src/testcases/org/apache/poi/ss/util/TestDateFormatConverter.java?rev=1301923&view=auto
==============================================================================
--- poi/trunk/src/testcases/org/apache/poi/ss/util/TestDateFormatConverter.java (added)
+++ poi/trunk/src/testcases/org/apache/poi/ss/util/TestDateFormatConverter.java Sat Mar 17
12:16:45 2012
@@ -0,0 +1,130 @@
+/*
+ *  ====================================================================
+ *    Licensed to the Apache Software Foundation (ASF) under one or more
+ *    contributor license agreements.  See the NOTICE file distributed with
+ *    this work for additional information regarding copyright ownership.
+ *    The ASF licenses this file to You under the Apache License, Version 2.0
+ *    (the "License"); you may not use this file except in compliance with
+ *    the License.  You may obtain a copy of the License at
+ *
+ *        http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *    Unless required by applicable law or agreed to in writing, software
+ *    distributed under the License is distributed on an "AS IS" BASIS,
+ *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *    See the License for the specific language governing permissions and
+ *    limitations under the License.
+ * ====================================================================
+ */
+
+package org.apache.poi.ss.util;
+
+import junit.framework.TestCase;
+import org.apache.poi.hssf.usermodel.HSSFWorkbook;
+import org.apache.poi.ss.usermodel.*;
+import org.apache.poi.util.TempFile;
+
+import java.io.File;
+import java.io.FileOutputStream;
+import java.text.DateFormat;
+import java.text.SimpleDateFormat;
+import java.util.Date;
+import java.util.Locale;
+
+public final class TestDateFormatConverter extends TestCase {
+    private void outputLocaleDataFormats( Date date, boolean dates, boolean times, int style,
String styleName ) throws Exception {
+
+        Workbook workbook = new HSSFWorkbook();
+        String sheetName;
+        if( dates ) {
+            if( times ) {
+                sheetName = "DateTimes";
+            } else {
+                sheetName = "Dates";
+            }
+        } else {
+            sheetName = "Times";
+        }
+        Sheet sheet = workbook.createSheet(sheetName);
+        Row header = sheet.createRow(0);
+        header.createCell(0).setCellValue("locale");
+        header.createCell(1).setCellValue("DisplayName");
+        header.createCell(2).setCellValue("Excel " + styleName);
+        header.createCell(3).setCellValue("java.text.DateFormat");
+        header.createCell(4).setCellValue("Equals");
+        header.createCell(5).setCellValue("Java pattern");
+        header.createCell(6).setCellValue("Excel pattern");
+
+        int rowNum = 1;
+        for( Locale locale : DateFormat.getAvailableLocales() ) {
+            Row row = sheet.createRow(rowNum++);
+
+            row.createCell(0).setCellValue(locale.toString());
+            row.createCell(1).setCellValue(locale.getDisplayName());
+
+            DateFormat dateFormat;
+            if( dates ) {
+                if( times ) {
+                    dateFormat = DateFormat.getDateTimeInstance(style, style, locale);
+                } else {
+                    dateFormat = DateFormat.getDateInstance(style, locale);
+                }
+            } else {
+                dateFormat = DateFormat.getTimeInstance(style, locale);
+            }
+
+            Cell cell = row.createCell(2);
+
+            cell.setCellValue(date);
+            CellStyle cellStyle = row.getSheet().getWorkbook().createCellStyle();
+
+            String javaDateFormatPattern = ((SimpleDateFormat)dateFormat).toPattern();
+            String excelFormatPattern = DateFormatConverter.convert(locale, javaDateFormatPattern);
+
+            DataFormat poiFormat = row.getSheet().getWorkbook().createDataFormat();
+            cellStyle.setDataFormat(poiFormat.getFormat(excelFormatPattern));
+            row.createCell(3).setCellValue(dateFormat.format(date));
+
+            cell.setCellStyle(cellStyle);
+
+            // the formula returns TRUE is the formatted date in column C equals to the string
in column D
+            row.createCell(4).setCellFormula("TEXT(C"+rowNum+",G"+rowNum+")=D" + rowNum);
+            row.createCell(5).setCellValue(javaDateFormatPattern);
+            row.createCell(6).setCellValue(excelFormatPattern);
+        }
+
+        File outputFile = TempFile.createTempFile("Locale" + sheetName + styleName, ".xlsx");
+        FileOutputStream outputStream = new FileOutputStream(outputFile);
+        try {
+            workbook.write(outputStream);
+        } finally {
+            outputStream.close();
+        }
+        System.out.println("Open " + outputFile.getAbsolutePath()+" in Excel");
+
+    }
+
+    public void testJavaDateFormatsInExcel() throws Exception {
+
+        Date date = new Date();
+
+        outputLocaleDataFormats(date, true, false, DateFormat.DEFAULT, "Default" );
+        outputLocaleDataFormats(date, true, false, DateFormat.SHORT, "Short" );
+        outputLocaleDataFormats(date, true, false, DateFormat.MEDIUM, "Medium" );
+        outputLocaleDataFormats(date, true, false, DateFormat.LONG, "Long" );
+        outputLocaleDataFormats(date, true, false, DateFormat.FULL, "Full" );
+
+        outputLocaleDataFormats(date, true, true, DateFormat.DEFAULT, "Default" );
+        outputLocaleDataFormats(date, true, true, DateFormat.SHORT, "Short" );
+        outputLocaleDataFormats(date, true, true, DateFormat.MEDIUM, "Medium" );
+        outputLocaleDataFormats(date, true, true, DateFormat.LONG, "Long" );
+        outputLocaleDataFormats(date, true, true, DateFormat.FULL, "Full" );
+
+        outputLocaleDataFormats(date, false, true, DateFormat.DEFAULT, "Default" );
+        outputLocaleDataFormats(date, false, true, DateFormat.SHORT, "Short" );
+        outputLocaleDataFormats(date, false, true, DateFormat.MEDIUM, "Medium" );
+        outputLocaleDataFormats(date, false, true, DateFormat.LONG, "Long" );
+        outputLocaleDataFormats(date, false, true, DateFormat.FULL, "Full" );
+    }
+
+}



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