org.apache.lucene.queryParser.ParseException: Encountered "<EOF>" at line 1, column 0.
Was expecting one of:
    <NOT> ...
    "+" ...
    "-" ...
    "(" ...
    <QUOTED> ...
    <TERM> ...
    <PREFIXTERM> ...
    <WILDTERM> ...
    "[" ...
    "{" ...
    <NUMBER> ...
    
 at org.apache.lucene.queryParser.QueryParser.generateParseException(QueryParser.java:1152)
 at org.apache.lucene.queryParser.QueryParser.jj_consume_token(QueryParser.java:1035)
 at org.apache.lucene.queryParser.QueryParser.Clause(QueryParser.java:682)
 at org.apache.lucene.queryParser.QueryParser.Query(QueryParser.java:607)
 at org.xiang.IndexDAO.Searcher(IndexDAO.java:63)
 at com.xiang.struts.TextAction.execute(TextAction.java:70)
 at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:419)
 at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:224)
 at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1194)
 at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:432)
 at javax.servlet.http.HttpServlet.service(HttpServlet.java:763)
 at javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
 at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:284)
 at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:204)
 at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:256)
 at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:151)
 at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:564)
 at org.apache.catalina.core.StandardContextValve.invokeInternal(StandardContextValve.java:245)
 at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:199)
 at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:151)
 at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:564)
 at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:195)
 at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:151)
 at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:164)
 at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:149)
 at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:564)
 at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:156)
 at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:151)
 at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:564)
 at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:972)
 at org.apache.coyote.tomcat5.CoyoteAdapter.service(CoyoteAdapter.java:211)
 at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:805)
 at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:696)
 at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:605)
 at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:677)
 at java.lang.Thread.run(Thread.java:595)