解决抽词word2003之前版本文档报错问题

抽词扩展名为.doc的word文档报一系列异常如下：

异常一：

java.lang.IndexOutOfBoundsException: Index: 10, Size: 7
at java.util.ArrayList.RangeCheck(Unknown Source)
at java.util.ArrayList.get(Unknown Source)
at org.apache.poi.hwpf.model.PlexOfCps.getProperty(PlexOfCps.java:70)
at org.apache.poi.hwpf.usermodel.HeaderStories.getAt(HeaderStories.java:155)
at org.apache.poi.hwpf.usermodel.HeaderStories.getFirstHeader(HeaderStories.java:87)
at org.apache.poi.hwpf.extractor.WordExtractor.getHeaderText(WordExtractor.java:178)
at org.apache.poi.hwpf.extractor.WordExtractor.getText(WordExtractor.java:254)
at com.index.extractor.impl.WordFileTextExtractor.getText(WordFileTextExtractor.java:23)
at test.TextConvert.convert(TextConvert.java:147)
at test.TextConvert.getEFiles(TextConvert.java:111)
at test.TextConvert.getEFiles(TextConvert.java:130)
at test.TextConvert.getEFiles(TextConvert.java:130)
at test.TextConvert.getEFiles(TextConvert.java:130)
at test.TextConvert.getEFiles(TextConvert.java:130)
at test.TextConvert.go(TextConvert.java:47)
at test.TextConvert.main(TextConvert.java:42)

异常二：

java.lang.ArrayIndexOutOfBoundsException: 218636
at org.apache.poi.util.LittleEndian.getShort(LittleEndian.java:45)
at org.apache.poi.hwpf.model.ListLevel.<init>(ListLevel.java:120)
at org.apache.poi.hwpf.model.ListFormatOverrideLevel.<init>(ListFormatOverrideLevel.java:48)
at org.apache.poi.hwpf.model.ListTables.<init>(ListTables.java:88)
at org.apache.poi.hwpf.HWPFDocument.<init>(HWPFDocument.java:267)
at org.apache.poi.hwpf.HWPFDocument.<init>(HWPFDocument.java:157)
at org.apache.poi.hwpf.extractor.WordExtractor.<init>(WordExtractor.java:62)
at org.apache.poi.hwpf.extractor.WordExtractor.<init>(WordExtractor.java:54)
at com.index.extractor.impl.WordFileTextExtractor.getText(WordFileTextExtractor.java:22)
at test.TextConvert.convert(TextConvert.java:147)
at test.TextConvert.getEFiles(TextConvert.java:111)
at test.TextConvert.getEFiles(TextConvert.java:130)
at test.TextConvert.getEFiles(TextConvert.java:130)
at test.TextConvert.getEFiles(TextConvert.java:130)
at test.TextConvert.getEFiles(TextConvert.java:130)
at test.TextConvert.go(TextConvert.java:47)
at test.TextConvert.main(TextConvert.java:42)


异常三：

java.lang.NullPointerException
at org.apache.poi.hwpf.sprm.ParagraphSprmUncompressor.uncompressPAP(ParagraphSprmUncompressor.java:47)
at org.apache.poi.hwpf.model.StyleSheet.createPap(StyleSheet.java:241)
at org.apache.poi.hwpf.model.StyleSheet.<init>(StyleSheet.java:116)
at org.apache.poi.hwpf.HWPFDocument.<init>(HWPFDocument.java:260)
at org.apache.poi.hwpf.HWPFDocument.<init>(HWPFDocument.java:157)
at org.apache.poi.hwpf.extractor.WordExtractor.<init>(WordExtractor.java:62)
at org.apache.poi.hwpf.extractor.WordExtractor.<init>(WordExtractor.java:54)
at com.index.extractor.impl.WordFileTextExtractor.getText(WordFileTextExtractor.java:22)
at test.TextConvert.convert(TextConvert.java:147)
at test.TextConvert.getEFiles(TextConvert.java:111)
at test.TextConvert.getEFiles(TextConvert.java:130)
at test.TextConvert.getEFiles(TextConvert.java:130)
at test.TextConvert.getEFiles(TextConvert.java:130)
at test.TextConvert.getEFiles(TextConvert.java:130)
at test.TextConvert.go(TextConvert.java:47)
at test.TextConvert.main(TextConvert.java:42)
程序抽词主要调用源代码：
WordExtractor extractor = new WordExtractor(in);

str = extractor.getText();

其实就只有简单的两行代码，但在poi3.7源代码中发现一个类 Word6Extractor，其注释说明如下：

Class to extract the text from old (Word 6 / Word 95) Word Documents.
*
* This should only be used on the older files, for most uses you
* should call {@link WordExtractor} which deals properly
* with HWPF.

修改代码为：

Word6Extractor extractor = new Word6Extractor(in);

str = extractor.getText();

再次运行错误都不见了。