I want to copy file from one directory to another and then I want to open new copied document a new page using servlets. I wrote this code in my servlet to copying file.
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
String Docpath=request.getParameter("document");
String docname=request.getParameter("docName");
response.setContentType("application/pdf");
response.setHeader("Content-Disposition", "inline;filename="+docname);
ServletOutputStream outs = response.getOutputStream ();
BufferedInputStream bis=null;
BufferedOutputStream bos=null;
File file=new File("T:\\Temp\\"+docname);
try {
Path original=Paths.get(Docpath);
Path destination=Paths.get("T:\\Temp\\"+docname);
Files.copy(original, destination,StandardCopyOption.REPLACE_EXISTING);
InputStream input=new FileInputStream(file);
bis=new BufferedInputStream(input);
bos=new BufferedOutputStream(outs);
byte[] buf = new byte[1024];
int bytesRead;
while ((bytesRead = bis.read(buf)) > 0) {
bos.write(buf, 0, bytesRead);
}
}finally {
bis.close();
bos.close();
}
doGet(request, response);
}
}
But it gives me this error
java.lang.NullPointerException
at org.solr.openDocumentServlet.doPost(openDocumentServlet.java:74)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:661)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:742)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:199)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:493)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:81)
at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:650)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:342)
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:800)
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:806)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1498)
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Unknown Source)
I don't know how to fix it. Can you help me please?
