Add a HSSF/XSSF example relating to cell styles and colours

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1177793 13f79535-47bb-0310-9956-ffa450edef68

src/examples/src/org/apache/poi/ss/examples/CellStyleDetails.java

@@ -0,0 +1,94 @@
+/* ====================================================================
+   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.examples;
+
+import java.io.File;
+
+import org.apache.poi.hssf.usermodel.HSSFFont;
+import org.apache.poi.hssf.usermodel.HSSFWorkbook;
+import org.apache.poi.hssf.util.HSSFColor;
+import org.apache.poi.ss.usermodel.Cell;
+import org.apache.poi.ss.usermodel.CellStyle;
+import org.apache.poi.ss.usermodel.Color;
+import org.apache.poi.ss.usermodel.DataFormatter;
+import org.apache.poi.ss.usermodel.Font;
+import org.apache.poi.ss.usermodel.Row;
+import org.apache.poi.ss.usermodel.Sheet;
+import org.apache.poi.ss.usermodel.Workbook;
+import org.apache.poi.ss.usermodel.WorkbookFactory;
+import org.apache.poi.ss.util.CellReference;
+import org.apache.poi.xssf.usermodel.XSSFColor;
+import org.apache.poi.xssf.usermodel.XSSFFont;
+
+/**
+ * Demonstrates how to read excel styles for cells
+ */
+public class CellStyleDetails {
+    public static void main(String[] args) throws Exception {
+        if(args.length == 0) {
+           throw new IllegalArgumentException("Filename must be given");
+        }
+        
+        Workbook wb = WorkbookFactory.create(new File(args[0]));
+        DataFormatter formatter = new DataFormatter();
+       
+        for(int sn=0; sn<wb.getNumberOfSheets(); sn++) {
+           Sheet sheet = wb.getSheetAt(sn);
+           System.out.println("Sheet #" + sn + " : " + sheet.getSheetName());
+           
+           for(Row row : sheet) {
+              System.out.println("  Row " + row.getRowNum());
+              
+              for(Cell cell : row) {
+                 CellReference ref = new CellReference(cell);
+                 System.out.print("    " + ref.formatAsString());
+                 System.out.print(" (" + cell.getColumnIndex() + ") ");
+                 
+                 CellStyle style = cell.getCellStyle();
+                 System.out.print("Format=" + style.getDataFormatString() + " ");
+                 System.out.print("FG=" + renderColor(style.getFillForegroundColorColor()) + " ");
+                 System.out.print("BG=" + renderColor(style.getFillBackgroundColorColor()) + " ");
+                 
+                 Font font = wb.getFontAt( style.getFontIndex() );
+                 System.out.print("Font=" + font.getFontName() + " ");
+                 System.out.print("FontColor=");
+                 if(font instanceof HSSFFont) {
+                    System.out.print( renderColor( ((HSSFFont)font).getHSSFColor((HSSFWorkbook)wb)) );
+                 }
+                 if(font instanceof XSSFFont) {
+                    System.out.print( renderColor( ((XSSFFont)font).getXSSFColor()) );
+                 }
+                 
+                 System.out.println();
+                 System.out.println("        " + formatter.formatCellValue(cell));
+              }
+           }
+           
+           System.out.println();
+        }
+    }
+    
+    private static String renderColor(Color color) {
+       if(color instanceof HSSFColor) {
+          return ((HSSFColor)color).getHexString();
+       } else if(color instanceof XSSFColor) {
+          return ((XSSFColor)color).getARGBHex();
+       } else {
+          return "(none)";
+       }
+    }
+}