delcollectionaction.java

前期开发时开发的新闻发布系统

package luceneAction;

import org.apache.struts.action.*;
import javax.servlet.http.*;
import javax.servlet.ServletContext;
import org.apache.lucene.index.IndexReader;
import org.apache.lucene.index.IndexWriter;
import org.apache.lucene.analysis.standard.StandardAnalyzer;
import org.bit.demo.*;
import luceneActionForm.delCollectionActionForm;

public class delCollectionAction extends Action 
{
	
	public ActionForward execute(ActionMapping actionMapping, ActionForm actionForm, HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse) 
	{
		delCollectionActionForm dForm = (delCollectionActionForm) actionForm;
		int index = dForm.getIndex();
		ServletContext application = httpServletRequest.getSession().getServletContext();
		InitialCollection ic = (InitialCollection) application.getAttribute("collection");
		DocCollection d = (DocCollection) ic.get(index);
		if(d.isIndexed()) 
		{
			String projectPath = httpServletRequest.getSession().getServletContext().getRealPath("/");
			StringBuffer delurl = new StringBuffer();
			delurl.append(projectPath).append("/collection/").append(d.getName());
			try 
			{
				IndexReader reader = IndexReader.open(Configuration.INDEX_STORE_PATH);
				DeleteCollection.delete(reader, delurl.toString());
				reader.close();
				IndexWriter writer = new IndexWriter(Configuration.INDEX_STORE_PATH, new StandardAnalyzer(), false);
				writer.maxFieldLength = 1000000;
				writer.optimize();
				writer.close();
			} 
			catch(Exception e) 
			{
				e.printStackTrace();
			}
		}
		ic.delete(index);
		return actionMapping.findForward("collection");
	}
}