[英]java.io.IOException: read past EOF Lucene in Java with Eclipse
我想做什么:我有一個用Lucene創建的本地索引,我需要為索引中的所有文檔獲取一個值。
我的問題是我無法閱讀索引!
我的程序:
public class index {
public static void main(String[] args) {
try {
read();
} catch (CorruptIndexException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
public static void read() throws CorruptIndexException, IOException {
System.out.println("step");
IndexReader r = IndexReader.open("D:/index/DEV_IdxDOSSIER/data/index");
System.out.println("step");
int num = r.numDocs();
for (int i = 0; i < num; i++)
{
System.out.println("step3");
Document d = r.document(i);
System.out.println("DC_KEY: ");
System.out.println(d.get("DC_KEY"));
}
/*if (!r.isDeleted(i))
{
Document d = r.document(i);
System.out.println("d=" +d);
}*/
r.close();
System.out.println("read doesn't work yet!");
}
}
這是我得到的錯誤:
step1
java.io.IOException: read past EOF
at org.apache.lucene.store.BufferedIndexInput.refill(BufferedIndexInput.java:151)
at org.apache.lucene.store.BufferedIndexInput.readBytes(BufferedIndexInput.java:116)
at org.apache.lucene.store.BufferedIndexInput.readBytes(BufferedIndexInput.java:92)
at org.apache.lucene.store.ChecksumIndexInput.readBytes(ChecksumIndexInput.java:43)
at org.apache.lucene.store.IndexInput.readString(IndexInput.java:124)
at org.apache.lucene.index.SegmentInfo.<init>(SegmentInfo.java:148)
at org.apache.lucene.index.SegmentInfos.read(SegmentInfos.java:234)
at org.apache.lucene.index.DirectoryIndexReader$1.doBody(DirectoryIndexReader.java:95)
at org.apache.lucene.index.SegmentInfos$FindSegmentsFile.run(SegmentInfos.java:653)
at org.apache.lucene.index.DirectoryIndexReader.open(DirectoryIndexReader.java:115)
at org.apache.lucene.index.IndexReader.open(IndexReader.java:316)
at org.apache.lucene.index.IndexReader.open(IndexReader.java:206)
at indexation.index.read(index.java:152)
at indexation.index.main(index.java:49)
PS:我是Lucene的新手。 我是1天前開始的,這是一份工作。
Lucene發行版中包含一個有關如何搜索索引的演示 。 您可能想看看。
我成功了:
public static void read() throws IOException {
System.out.println("Etape1");
File indexDirectory = new File("D:/index/DEV_IdxDOSSIER/data/index");
IndexReader r = IndexReader.open(FSDirectory.open(indexDirectory));
System.out.println("Etape2");
int num = r.numDocs();
int nbrUA = 0 ;
for (int i = 0; i < num; i++) {
Document d = r.document(i);
System.out.println("DC_KEY: " + d.get("DC_KEY"));
try {
FileWriter fw = new FileWriter("D:\\index\\test.txt", true);
BufferedWriter output = new BufferedWriter(fw);
if (d.get("DC_KEY") != null) {
output.write(d.get("DC_KEY") + "\r\n");
System.out.println("fichier mis à jour");
} else {
System.out.println("Le DC_KEY est null c'est une Unité d'Archive");
nbrUA++;
}
output.flush();
output.close();
} catch (IOException ioe) {
System.out.println("the fonction write didn't Work, here is the Error");
ioe.printStackTrace();
} catch (NullPointerException ioe) {
System.out.println("Erreur : pointeur null");
System.out.println("the fonction write didn't Work, here is the Error");
ioe.printStackTrace();
}
System.out.println("nombre de document traité : " + (i + 1) + "\r\n");
}
r.close();
System.out.println("nombre d'Unité d'Archive : " + nbrUA + "\r\n");
}
您必須將lucene-core-4.4.0.jar
導入到您的庫中,在此處閱讀添加lucene-core-4.4.0的教程。
這個lucene-core-4.4.0.jar
可能與您有所不同(僅4.4.0會更改)。
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