PDFServlet.java , servlet-pdf-read-save to client side

import java.io.File;
import java.io.FileInputStream;
import java.io.PrintWriter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class PDFServlet extends javax.servlet.http.HttpServlet{
static genIR56EPDF genIR56EPDF = new genIR56EPDF();
final static String CONTENT_TYPE = "application/pdf";
publicPDFServlet(){ }
public void doGet(HttpServletRequest request, HttpServletResponse response){
processRequest(request, response);
}

public void doPost(HttpServletRequest request, HttpServletResponse response){
doGet(request, response);
}

public void processRequest(HttpServletRequest request, HttpServletResponse response){
response.setContentType(this.CONTENT_TYPE);
try{
genIR56EPDF.run();
File file1 = new File("/hr/payrollSlip.pdf");
FileInputStream fs = new FileInputStream(file1);
byte[] byteArray = new byte[(int) file1.length()];
fs.read(byteArray);
fs.close();
response.getOutputStream().write(byteArray);
}catch(Exception e){
this.outErrorMessage(response, "Some exception occurred: " + e.getMessage());
return;
}
}

private void outErrorMessage(HttpServletResponse response, String errorMsg){
response.setContentType("text/plain");
try{
PrintWriter out = response.getWriter();
out.println(errorMsg);
}catch(Exception e){ }
}
}