bug 61286/bug 61287 -- allow WriteProtectRecord to have 2 bytes, and allow for HeaderFooter to be empty.

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1801966 13f79535-47bb-0310-9956-ffa450edef68

src/java/org/apache/poi/hssf/record/HeaderFooterBase.java

 	protected HeaderFooterBase(RecordInputStream in) {
 		if (in.remaining() > 0) {
 			int field_1_footer_len = in.readShort();
+			//61287 -- if the footer_len == 0, there may not be a multibyte flag
+			if (field_1_footer_len == 0) {
+				field_3_text = "";
+				if (in.remaining() == 0) {
+					return;
+				}
+			}
 			field_2_hasMultibyte = in.readByte() != 0x00;
 
 			if (field_2_hasMultibyte) {

src/java/org/apache/poi/hssf/record/WriteProtectRecord.java

      */
     public WriteProtectRecord(RecordInputStream in)
     {
+        if (in.remaining() == 2) {
+            in.readShort();
+        }
     }
 
     public String toString()

src/testcases/org/apache/poi/hssf/usermodel/TestBugs.java

 import static org.junit.Assert.assertTrue;
 import static org.junit.Assert.fail;
 
+import javax.imageio.ImageIO;
 import java.awt.image.BufferedImage;
 import java.io.ByteArrayInputStream;
 import java.io.ByteArrayOutputStream;
 import java.util.Locale;
 import java.util.TimeZone;
 
-import javax.imageio.ImageIO;
-
 import org.apache.poi.EncryptedDocumentException;
 import org.apache.poi.hssf.HSSFITestDataProvider;
 import org.apache.poi.hssf.HSSFTestDataSamples;
         wb.getCreationHelper().createFormulaEvaluator().evaluateAll();
         wb.close();
     }
+
+    @Test
+    public void test61287() throws IOException {
+        final Workbook wb = HSSFTestDataSamples.openSampleWorkbook("61287.xls");
+        ExcelExtractor ex = new ExcelExtractor((HSSFWorkbook)wb);
+        String text = ex.getText();
+        assertContains(text, "资产负债表");
+        wb.close();
+    }
+
 }