线程“ main”中的异常java.lang.NoSuchFieldError：文件系统

Question

i have written a program for reading the contents of my microsoft word document file. actualy my requirement is to get the document map of the word.doc, i throught of getting started with reading the doc file my code is ..

public static void readParagraphs(HWPFDocument doc) throws Exception
        {
            WordExtractor we = new WordExtractor(doc);
            /**Get the total number of paragraphs**/
            String[] paragraphs = we.getParagraphText();
            System.out.println("Total Paragraphs: "+paragraphs.length);
            for (int i = 0; i < paragraphs.length; i++) 
            {
                System.out.println("Length of paragraph "+(i +1)+": "+ paragraphs[i].length());
                System.out.println(paragraphs[i].toString());
            }
        }

---

but am getting Exception in thread "main" java.lang.NoSuchFieldError: filesystem
    at org.apache.poi.hwpf.HWPFDocument.<init>(HWPFDocument.java:218)
    at org.apache.poi.hwpf.HWPFDocument.<init>(HWPFDocument.java:158)
    at com.honeywell.corept.srd.ReadDocFileFromJava.readMyDocument(ReadDocFileFromJava.java:25)
    at com.honeywell.corept.srd.ReadDocFileFromJava.main(ReadDocFileFromJava.java:18)

this exception am not able to solve this. please help.

Answer 1

Please check if you have two copies of POI JAR on your classpath.

If yes, keep single copy.