Upload image file into database using java servlet, jdbc and mysql

In this example we are going to create a project which will enable users to upload the image into the database.
First of all turn on mysql database connection and open the mysql command line and paste the following sql script and create the new database as well as table.

create database AppDB;

use AppDB;

CREATE TABLE `contacts` (
  `contact_id` int(11) NOT NULL AUTO_INCREMENT,
  `first_name` varchar(45) DEFAULT NULL,
  `last_name` varchar(45) DEFAULT NULL,
  `photo` mediumblob,
  PRIMARY KEY (`contact_id`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1


Now, lets create a dynamic web project into the eclipse and design the structure as follows:



Now, let's create the front end using the jsp pages.
uploadImage.jsp

<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
    pageEncoding="ISO-8859-1"%>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>File Upload</title>
</head>
<body>
    <h1>Upload any image to mysql DB</h1>
    <form method="post" action="fileUpload"
        enctype="multipart/form-data">
        <table>
            <tr>
                <td>First Name:</td>
                <td><input type="text" name="firstName" size="10"
                    required="required" /></td>
            </tr>
            <tr>
                <td>Last Name:</td>
                <td><input type="text" name="lastName" size="10"
                    required="required" /></td>
            </tr>
            <tr>
                <td>Choose Image:</td>
                <td><input type="file" name="photo" size="10"
                    required="required" /></td>
            </tr>
            <tr>
                <td><input type="submit" value="Submit"></td>
                <td><input type="reset" value="Clear" /></td>
            </tr>
        </table>
    </form>
</body>
</html>


submit.jsp

<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
    pageEncoding="ISO-8859-1"%>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Success</title>
</head>
<body>
    <h3><%=request.getAttribute("Message")%></h3>
</body>
</html>


db.properties

driver=com.mysql.jdbc.Driver
url=jdbc:mysql://localhost:3306/AppDB
user=root
password=password 


DbUtil.java

package com.amzi.util;

import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.util.Properties;

public class DbUtil {

    private static Connection connection = null;

    public static Connection getConnection() {
        if (connection != null)
            return connection;
        else {
            try {
                Properties prop = new Properties();
                InputStream inputStream = DbUtil.class.getClassLoader().getResourceAsStream("/db.properties");
                prop.load(inputStream);
                String driver = prop.getProperty("driver");
                String url = prop.getProperty("url");
                String user = prop.getProperty("user");
                String password = prop.getProperty("password");
                Class.forName(driver);
                connection = DriverManager.getConnection(url, user, password);
            } catch (ClassNotFoundException e) {
                e.printStackTrace();
            } catch (SQLException e) {
                e.printStackTrace();
            } catch (FileNotFoundException e) {
                e.printStackTrace();
            } catch (IOException e) {
                e.printStackTrace();
            }
            return connection;
        }

    }
}


UploadServlet.java

package com.amzi.servlet;

import java.io.IOException;
import java.io.InputStream;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.SQLException;

import javax.servlet.ServletException;
import javax.servlet.annotation.MultipartConfig;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.Part;

import com.amzi.util.DbUtil;

@WebServlet("/fileUpload")
@MultipartConfig(maxFileSize = 16177215) // upload file up to 16MB
public class UploadServlet extends HttpServlet {

    private static final long serialVersionUID = -1623656324694499109L;
    private Connection conn;

    public UploadServlet() {
        conn = DbUtil.getConnection();
    }

    protected void doPost(HttpServletRequest request,
            HttpServletResponse response) throws ServletException, IOException {
        
        // gets values of text fields
        String firstName = request.getParameter("firstName");
        String lastName = request.getParameter("lastName");

        InputStream inputStream = null;

        // obtains the upload file part in this multipart request
        Part filePart = request.getPart("photo");
        if (filePart != null) {
            // debug messages
            System.out.println(filePart.getName());
            System.out.println(filePart.getSize());
            System.out.println(filePart.getContentType());

            // obtains input stream of the upload file
            inputStream = filePart.getInputStream();
        }

        String message = null; // message will be sent back to client

        try {
            // constructs SQL statement
            String sql = "INSERT INTO contacts (first_name, last_name, photo) values (?, ?, ?)";
            PreparedStatement statement = conn.prepareStatement(sql);
            statement.setString(1, firstName);
            statement.setString(2, lastName);

            if (inputStream != null) {
                // fetches input stream of the upload file for the blob column
                statement.setBlob(3, inputStream);
            }

            // sends the statement to the database server
            int row = statement.executeUpdate();
            if (row > 0) {
                message = "Image is uploaded successfully into the Database";
            }
        } catch (SQLException ex) {
            message = "ERROR: " + ex.getMessage();
            ex.printStackTrace();
        }
        // sets the message in request scope
        request.setAttribute("Message", message);

        // forwards to the message page
        getServletContext().getRequestDispatcher("/submit.jsp").forward(
                request, response);
    }
}


Now, we are ready to run the project and once we run the project we are able to view the following result.





Click here to download the code.

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40 comments:

  1. what does Part interface do in the above code?????

    ReplyDelete
  2. hi i m getting null pointer exception

    ReplyDelete
    Replies
    1. At what line you are getting null pointer. What is your stack trace also if everything is configured as I mentioned then it shouldn't be. Try to download the source code which I have provided and then give it a shot.

      Delete

    2. FileUploadDBServlet.java:54: package com.mysql.jdbc does not exist
      DriverManager.registerDriver(new com.mysql.jdbc.Driver());
      ^
      1 error

      Delete
  3. i have got the error in uploadimage,java file at "Part" object

    ReplyDelete
  4. import javax.servlet.annotation.MultipartConfig;
    import javax.servlet.annotation.WebServlet;
    the annotations does not exist............

    ReplyDelete
  5. cannot find symbol
    symbol: class Part
    location: class UploadServlet

    cannot find symbol
    symbol: method getPart(java.lang.String)
    location: interface javax.servlet.http.HttpServletReques


    what to do for this????

    ReplyDelete
    Replies
    1. What run time environment are you using. Make sure you have the run time set up and properly configured in your project structure. That should fix the issue.

      Delete
    2. I'm getting the same issue... Can you help me? How can I set up and configure the run time?

      Delete
  6. what is this error :
    : JAVAX.SERVLET.SERVLETEXCEPTION: ORG.APACHE.TOMCAT.UTIL.HTTP.FILEUPLOAD.FILEUPLOADBASE$INVALIDCONTENTTYPEEXCEPTION: THE REQUEST DOESN'T CONTAIN A MULTIPART/FORM-DATA OR MULTIPART/FORM-DATA STREAM, CONTENT TYPE HEADER IS APPLICATION/X-WWW-FORM-URLENCODED

    ReplyDelete
  7. Hello sir , i am getting this type of exception
    so plz help me

    type Exception report

    message Error instantiating servlet class com.UploadServletq

    description The server encountered an internal error that prevented it from fulfilling this request.

    exception

    javax.servlet.ServletException: Error instantiating servlet class com.UploadServletq
    org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
    org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
    org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:947)
    org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
    org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1009)
    org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)
    org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:312)
    java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source)
    java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
    java.lang.Thread.run(Unknown Source)

    root cause

    java.lang.ClassNotFoundException: com.UploadServletq
    org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1713)
    org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1558)
    org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
    org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
    org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:947)
    org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
    org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1009)
    org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)
    org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:312)
    java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source)
    java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
    java.lang.Thread.run(Unknown Source)

    note The full stack trace of the root cause is available in the Apache Tomcat/7.0.39 logs.

    ReplyDelete
    Replies
    1. Looks like its not able to find the class named "UploadServletq". If you have taken the source code from the link I've provided or you have copied the source make sure the servlet name(UploadServlet) is correct.

      Delete
  8. HTTP Status 500 - Servlet execution threw an exception

    type Exception report

    message Servlet execution threw an exception

    description The server encountered an internal error that prevented it from fulfilling this request.

    exception

    javax.servlet.ServletException: Servlet execution threw an exception
    org.netbeans.modules.web.monitor.server.MonitorFilter.doFilter(MonitorFilter.java:393)

    root cause

    java.lang.AbstractMethodError: Method com/mysql/jdbc/PreparedStatement.setBlob(ILjava/io/InputStream;)V is abstract
    com.mysql.jdbc.PreparedStatement.setBlob(PreparedStatement.java)
    UploadServlet.doPost(UploadServlet.java:54)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:647)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
    org.netbeans.modules.web.monitor.server.MonitorFilter.doFilter(MonitorFilter.java:393)

    note The full stack trace of the root cause is available in the Apache Tomcat/7.0.41 logs.
    Apache Tomcat/7.0.41

    ReplyDelete
  9. hello sir, i'm selvamptl how to create properties class now i'm using netbeans 6.0.1 beta version?

    ReplyDelete
    Replies
    1. Not sure about netbeans, however try this
      right click on your src folder and New> Other> Other> Properties file or something like that

      Delete
  10. Thanks perfectly working......................

    ReplyDelete
  11. hello sir i...
    i got just face this type of error -> No value specified for parameter 1
    filePart has no values it still contains null

    ReplyDelete
  12. How can I retrieve the image stored from the database using a servlet?

    ReplyDelete
  13. I not able to solve getPart().Please suggest....
    I am used following jar files

    1.commons-fileupload-1.2.1.jar
    2.commons-io-1.4.jar
    3.javax.servlet-3.0.jar
    4.javax.servlet-api-3.0.1.jar
    5.mysql-connector-java-5.1.7-bin.jar

    ReplyDelete
  14. Hi! Great effort but..
    Where's your dao?Mvc?Hibernate?Beans?
    Spaghettis ...

    ReplyDelete
  15. thank u so much it runs in first attempt

    ReplyDelete
  16. hi sir i am getting a abstractmethod error.can you please help me.

    java.lang.AbstractMethodError: com.mysql.jdbc.PreparedStatement.setBlob(ILjava/io/InputStream;)V
    at com.amzi.servlet.UploadServlet.doPost(ImgStoringServlet.java:62)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:647)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
    at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100)
    at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:953)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
    at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1041)
    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:603)
    at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:310)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
    at java.lang.Thread.run(Thread.java:745)

    ReplyDelete
  17. hello sir i...
    i got this type of error ->

    type Exception report

    message

    description The server encountered an internal error () that prevented it from fulfilling this request.

    exception

    java.lang.NullPointerException
    org.servlet.UploadServlet.doPost(UploadServlet.java:56)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:641)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:722)

    note The full stack trace of the root cause is available in the Apache Tomcat/7.0.22 logs.

    can i know where the error occur at ...

    ReplyDelete
  18. could you please post the xml file?

    ReplyDelete
  19. hi i am getting

    java.sql.SQLException: Missing IN or OUT parameter at index:: 6
    at oracle.jdbc.driver.OraclePreparedStatement.processCompletedBindRow(OraclePreparedStatement.java:1844)
    at oracle.jdbc.driver.OraclePreparedStatement.executeInternal(OraclePreparedStatement.java:3608)
    at oracle.jdbc.driver.OraclePreparedStatement.executeUpdate(OraclePreparedStatement.java:3694)
    at oracle.jdbc.driver.OraclePreparedStatementWrapper.executeUpdate(OraclePreparedStatementWrapper.java:1354)
    at ProductServlet.doPost(ProductServlet.java:77)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:650)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:731)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
    at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:505)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:170)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
    at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:956)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:423)
    at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1079)
    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:625)
    at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:316)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
    at java.lang.Thread.run(Thread.java:745)


    how to resolve this issue

    ReplyDelete
  20. Hello sir ,
    I am facing below error Please suggest which jar files we have to use ? and plse give the solution this error
    java.lang.NoSuchMethodError: javax.servlet.http.HttpServletRequest.getPart(Ljava/lang/String;)Ljavax/servlet/http/Part;
    at com.sangamone.FileUploadDatabase.FileUploadDatabase.doPost(FileUploadDatabase.java:45)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293)
    at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:859)
    at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:602)
    at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
    at java.lang.Thread.run(Unknown Source)

    ReplyDelete
  21. Hi it works perfectly... for me but how can i retrieve the image from db and have to show in jsp. Plzz help me out.

    ReplyDelete
  22. Hey there ! Thanks for the code,but i am getting "java.lang.AbstractMethodError: com.mysql.jdbc.PreparedStatement.setBlob(ILjava/io/InputStream;)V"
    exception ...
    Can you please tell me the versions of all the tools and the jar files used, starting from the JRE,Tomcat Server,Mysql-connect driver,mysql workbench and etc.

    ReplyDelete
  23. thank you its perfectly working....

    ReplyDelete
  24. 404 error. The requested resource is not available.

    ReplyDelete
  25. PLEASE HELP ME where i try this code i have
    java.lang.NullPointerException
    servlet.UploadServlet.doPost(UploadServlet.java:84)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:648)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
    org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)

    ReplyDelete
  26. HTTP Status 500 - Error instantiating servlet class com.upload.UploadServlet

    type Exception report

    message Error instantiating servlet class com.upload.UploadServlet

    description The server encountered an internal error that prevented it from fulfilling this request.

    exception

    javax.servlet.ServletException: Error instantiating servlet class com.upload.UploadServlet
    org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
    org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
    org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:616)
    org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:528)
    org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1100)
    org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:687)
    org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1520)
    org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1476)
    java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
    java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
    org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
    java.lang.Thread.run(Unknown Source)
    root cause

    java.lang.NullPointerException
    java.util.Properties$LineReader.readLine(Unknown Source)
    java.util.Properties.load0(Unknown Source)
    java.util.Properties.load(Unknown Source)
    com.jspexample.util.DbUtil.geConnection(DbUtil.java:25)
    com.upload.UploadServlet.(UploadServlet.java:30)
    sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
    sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
    java.lang.reflect.Constructor.newInstance(Unknown Source)
    java.lang.Class.newInstance(Unknown Source)
    org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
    org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
    org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:616)
    org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:528)
    org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1100)
    org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:687)
    org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1520)
    org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1476)
    java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
    java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
    org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
    java.lang.Thread.run(Unknown Source)
    note The full stack trace of the root cause is available in the Apache Tomcat/8.0.37 logs.

    Apache Tomcat/8.0.37

    ReplyDelete
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  30. HTTP Status 500 - Internal Server Error

    type Exception report

    messageInternal Server Error

    descriptionThe server encountered an internal error that prevented it from fulfilling this request.

    exception

    javax.servlet.ServletException: Error instantiating servlet class UploadServlet

    root cause

    com.sun.enterprise.container.common.spi.util.InjectionException: Error creating managed object for class: class UploadServlet

    root cause

    java.lang.reflect.InvocationTargetException

    root cause

    java.lang.NullPointerException

    note The full stack traces of the exception and its root causes are available in the GlassFish Server Open Source Edition 4.1.1 logs.
    GlassFish Server Open Source Edition 4.1.1

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  31. how to retrieve the same file from the database to the folder using jsp-servlet?

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