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How to solve Exception in thread "main" java.sql.SQLException: Access denied for user ''#'localhost' (using password: NO) [duplicate]

Exception in thread "main" java.sql.SQLException: Access denied for user ''#'localhost' (using password: NO)
at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:129)
at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:97)
at com.mysql.cj.jdbc.exceptions.SQLExceptionsMapping.translateException(SQLExceptionsMapping.java:122)
at com.mysql.cj.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:836)
at com.mysql.cj.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:456)
at com.mysql.cj.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:246)
at com.mysql.cj.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:199)
at java.sql.DriverManager.getConnection(Unknown Source)
at java.sql.DriverManager.getConnection(Unknown Source)
at com.mysql.cj.jdbc.admin.TimezoneDump.main(TimezoneDump.java:70)
I get this error no matter what I do. I use MySQL Workbench, I've changed the password for the root user, I've granted all rights to the user root, I've tried to disconnect and connect again to the database. Nothing, no matter what I do. Could you please help me solve this? I don't know what else to do. The password an username are both correct.
Java code:
package Restaurant;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
public class MainApp {
public void main(String[] args) throws SQLException
{
String url="jdbc:mysql://localhost:3306/new_schema";
Statement sql;
ResultSet rs;
Connection con=DriverManager.getConnection(url, "root", "root");
sql=(Statement)con.createStatement();
rs=sql.executeQuery("select * from restaurant");
while(rs.next())
{
System.out.println("Nume: "+rs.getString("nume")+", Specific: "+rs.getString("specificul")+", Zona: "+rs.getString("zona"));
}
rs.close();
sql.close();
con.close();
}
}
Workbench

Your eclipse is running the class "com.mysql.cj.jdbc.admin.TimezoneDump" (which also contain a main method) instead of your MainApp class.
Try this manipulation:
Right click on MainApp.java -> Run As -> Java Application

SSL error when connecting to remote SQL server using Java (netbeans)

i asked this question before but got no answers, i think mainly because it was a mess, i'll state the facts and put some quotes from the code under
im using VMWare, and have one Windows Server 2003 with SQL Server 2005 on it, with a SQL Login, and it has a DNS Service running
i also have a windows 7 machine running NetBeans8.2 with JDK 8.1, using JDBC 4.2
i can connect to the server using SQL Manager from the Windows 7 machine
i can't connect using the java code because of an SSL Error, i am not sure what is causing it
this is for a school project so i must use SQL server 2005
here's my connection code :
package connectbd;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.sql.PreparedStatement;
public class ConnectBD {
public static void main(String[] args) {
String jdbcurl;
Connection con = null;
try {
Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");
} catch (ClassNotFoundException e) {
e.printStackTrace();
}
jdbcurl = "jdbc:sqlserver://SQLSERVER;instanceName=SQLE;user=****;password=****;database=LP_SIBD_GR15";
try {
con=DriverManager.getConnection(jdbcurl);
System.out.println("Connection success");
} catch(SQLException e) {
e.printStackTrace();
}
}
}
This is the error that i get :
com.microsoft.sqlserver.jdbc.SQLServerException: The driver could not establish a secure connection to the SQL Server using Secure Sockets Layer (SSL) encryption. Error: "The SQL Server server returned no response. The connection has been closed. ClientConnectionId:e9655c34-7c66-42c8-aaec-36601b53ff98 ».
at com.microsoft.sqlserver.jdbc.SQLServerConnection.terminate(SQLServerConnection.java:2826)
****at com.microsoft.sqlserver.jdbc.TDSChannel.enableSSL(IOBuffer.java:1829)
at com.microsoft.sqlserver.jdbc.SQLServerConnection.connectHelper(SQLServerConnection.java:2391)
at com.microsoft.sqlserver.jdbc.SQLServerConnection.login(SQLServerConnection.java:2042)
at com.microsoft.sqlserver.jdbc.SQLServerConnection.connectInternal(SQLServerConnection.java:1889)
at com.microsoft.sqlserver.jdbc.SQLServerConnection.connect(SQLServerConnection.java:1120)
at com.microsoft.sqlserver.jdbc.SQLServerDriver.connect(SQLServerDriver.java:700)
at java.sql.DriverManager.getConnection(DriverManager.java:664)
at java.sql.DriverManager.getConnection(DriverManager.java:270)
at connectbd.ConnectBD.main(ConnectBD.java:35)
Caused by: java.io.IOException:
The SQL Server server returned no response. The connection was closed. ClientConnectionId:e9655c34-7c66-42c8-aaec-36601b53ff98
****at com.microsoft.sqlserver.jdbc.TDSChannel$SSLHandshakeInputStream.ensureSSLPayload(IOBuffer.java:786)
at com.microsoft.sqlserver.jdbc.TDSChannel$SSLHandshakeInputStream.readInternal(IOBuffer.java:836)
at com.microsoft.sqlserver.jdbc.TDSChannel$SSLHandshakeInputStream.read(IOBuffer.java:829)
at com.microsoft.sqlserver.jdbc.TDSChannel$ProxyInputStream.readInternal(IOBuffer.java:999)
at com.microsoft.sqlserver.jdbc.TDSChannel$ProxyInputStream.read(IOBuffer.java:989)
at sun.security.ssl.InputRecord.readFully(InputRecord.java:465)
at sun.security.ssl.InputRecord.read(InputRecord.java:503)
at sun.security.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:983)
at sun.security.ssl.SSLSocketImpl.performInitialHandshake(SSLSocketImpl.java:1385)
at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1413)
at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1397)
at com.microsoft.sqlserver.jdbc.TDSChannel.enableSSL(IOBuffer.java:1756)
... 8 more
BUILD SUCCESSFUL (total time: 1 second)
i believe the causes are somewhere in these 2 lines: the ones marked by **** at the start
i have to deliver a webservices project for school in 2 weeks, and this is kind of a huge obstacle, any quick help or suggestion would be very appreciated

You will need to add few parameters to specify the ssl connection, such as integratedSecurity=true, encrypt=true and trustServerCertificate=true.
jdbcurl = "jdbc:sqlserver://SQLSERVER;instanceName=SQLE;user=****;password=****;database=LP_SIBD_GR15;integratedSecurity=true;encrypt=true;trustServerCertificate=true";

com.microsoft.sqlserver.jdbc.SQLServerException: Login failed for user 'sa' [duplicate]

This question already has answers here:
SqlServer: Login failed for user
(14 answers)
Closed 4 years ago.
I am simply trying to test my connection with SQL Server 2008 as follows:
public class ForJDBC {
public static void main(String[] args) {
try{
Connection conn = DriverManager.getConnection("jdbc:sqlserver://XX.XX.X.XXX:1433;databaseName=MyDB;user=sa;password=mypassword");
if(conn != null){
System.out.println("Connection is Successfull");
}
}
catch(SQLException ex){
ex.printStackTrace();
}
}
}
But I keep on getting the following exception:
com.microsoft.sqlserver.jdbc.SQLServerException: Login failed for user 'sa'. ClientConnectionId:96f7d048-9734-4fd8-8216-21231d89b2e6
at com.microsoft.sqlserver.jdbc.SQLServerException.makeFromDatabaseError(SQLServerException.java:216)
at com.microsoft.sqlserver.jdbc.SQLServerException.makeFromDatabaseError(SQLServerException.java:216)
at com.microsoft.sqlserver.jdbc.TDSTokenHandler.onEOF(tdsparser.java:254)
at com.microsoft.sqlserver.jdbc.TDSParser.parse(tdsparser.java:84)
at com.microsoft.sqlserver.jdbc.SQLServerConnection.sendLogon(SQLServerConnection.java:2908)
at com.microsoft.sqlserver.jdbc.SQLServerConnection.logon(SQLServerConnection.java:2234)
at com.microsoft.sqlserver.jdbc.SQLServerConnection.access$000(SQLServerConnection.java:41)
at com.microsoft.sqlserver.jdbc.SQLServerConnection$LogonCommand.doExecute(SQLServerConnection.java:2220)
at com.microsoft.sqlserver.jdbc.TDSCommand.execute(IOBuffer.java:5696)
at com.microsoft.sqlserver.jdbc.SQLServerConnection.executeCommand(SQLServerConnection.java:1715)
at com.microsoft.sqlserver.jdbc.SQLServerConnection.connectHelper(SQLServerConnection.java:1326)
at com.microsoft.sqlserver.jdbc.SQLServerConnection.login(SQLServerConnection.java:991)
at com.microsoft.sqlserver.jdbc.SQLServerConnection.connect(SQLServerConnection.java:827)
at com.microsoft.sqlserver.jdbc.SQLServerDriver.connect(SQLServerDriver.java:1012)
at java.sql.DriverManager.getConnection(DriverManager.java:664)
at java.sql.DriverManager.getConnection(DriverManager.java:270)
at forjdbc.ForJDBC.main(ForJDBC.java:35)
When I connect to MySQL 5.5, it works fine.
Troubleshooting Steps I have followed:
1) Tried Logging with the "sa" user name and password within the SQL Server Management Console
using SQL Server Management studio
2) I have sqljdbc4.jar in my Source Package folder of Netbeans 7.4
3) Updated to Java 8
Please let me know what am I doing wrong and let me know if I can answer any questions.

Connection String Problem...
Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");
Connection connection = DriverManager
.getConnection("jdbc:sqlserver://localhost:1433;\SQLEXPRESS;databaseName=Tema6","sa","123456")

I think you missed loading the Driver class and registering it.
Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");
If still it is not working then please ensure your SQLServer services is running

Click SQL --> click right mouse --> propretise --> Securiti -->tick SQL server and windows Authentication mode
90% success!

Create a jTDS connection string

my sql server instance name is MYPC\SQLEXPRESS and I'm trying to create a jTDS connection string to connect to the database 'Blog'. Can anyone please help me accomplish that?
I'm trying to do like this:
DriverManager.getConnection("jdbc:jtds:sqlserver://127.0.0.1:1433/Blog", "user", "password");
and I get this:
java.sql.SQLException: Network error IOException: Connection refused: connect
at net.sourceforge.jtds.jdbc.ConnectionJDBC2.<init>(ConnectionJDBC2.java:395)
at net.sourceforge.jtds.jdbc.ConnectionJDBC3.<init>(ConnectionJDBC3.java:50)
at net.sourceforge.jtds.jdbc.Driver.connect(Driver.java:184)
at java.sql.DriverManager.getConnection(Unknown Source)
at java.sql.DriverManager.getConnection(Unknown Source)
at SqlConnection.Connect(SqlConnection.java:19)
at main.main(main.java:11)
Caused by: java.net.ConnectException: Connection refused: connect
at java.net.PlainSocketImpl.socketConnect(Native Method)
at java.net.PlainSocketImpl.doConnect(Unknown Source)
at java.net.PlainSocketImpl.connectToAddress(Unknown Source)
at java.net.PlainSocketImpl.connect(Unknown Source)
at java.net.SocksSocketImpl.connect(Unknown Source)
at java.net.Socket.connect(Unknown Source)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at net.sourceforge.jtds.jdbc.SharedSocket.createSocketForJDBC3(SharedSocket.java:305)
at net.sourceforge.jtds.jdbc.SharedSocket.<init>(SharedSocket.java:255)
at net.sourceforge.jtds.jdbc.ConnectionJDBC2.<init>(ConnectionJDBC2.java:323)
... 6 more

As detailed in the jTDS Frequenlty Asked Questions, the URL format for jTDS is:
jdbc:jtds:<server_type>://<server>[:<port>][/<database>][;<property>=<value>[;...]]
So, to connect to a database called "Blog" hosted by a MS SQL Server running on MYPC, you may end up with something like this:
jdbc:jtds:sqlserver://MYPC:1433/Blog;instance=SQLEXPRESS;user=sa;password=s3cr3t
Or, if you prefer to use getConnection(url, "sa", "s3cr3t"):
jdbc:jtds:sqlserver://MYPC:1433/Blog;instance=SQLEXPRESS
EDIT: Regarding your Connection refused error, double check that you're running SQL Server on port 1433, that the service is running and that you don't have a firewall blocking incoming connections.

Really, really, really check if the TCP/IP protocol is enabled in your local SQLEXPRESS instance.
Follow these steps to make sure:
Open "Sql Server Configuration Manager" in "Start Menu\Programs\Microsoft SQL Server 2012\Configuration Tools\"
Expand "SQL Server Network Configuration"
Go in "Protocols for SQLEXPRESS"
Enable TCP/IP
If you have any problem, check this blog post for details, as it contains screenshots and much more info.
Also check if the "SQL Server Browser" windows service is activated and running:
Go to Control Panel -> Administrative Tools -> Services
Open "SQL Server Browser" service and enable it (make it manual or automatic, depends on your needs)
Start it.
That's it.
After I installed a fresh local SQLExpress, all I had to do was to enable TCP/IP and start the SQL Server Browser service.
Below a code I use to test the SQLEXPRESS local connection. Of course, you should change the IP, DatabaseName and user/password as needed.:
import java.sql.Connection;
import java.sql.DatabaseMetaData;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
public class JtdsSqlExpressInstanceConnect {
public static void main(String[] args) throws SQLException {
Connection conn = null;
ResultSet rs = null;
String url = "jdbc:jtds:sqlserver://127.0.0.1;instance=SQLEXPRESS;DatabaseName=master";
String driver = "net.sourceforge.jtds.jdbc.Driver";
String userName = "user";
String password = "password";
try {
Class.forName(driver);
conn = DriverManager.getConnection(url, userName, password);
System.out.println("Connected to the database!!! Getting table list...");
DatabaseMetaData dbm = conn.getMetaData();
rs = dbm.getTables(null, null, "%", new String[] { "TABLE" });
while (rs.next()) { System.out.println(rs.getString("TABLE_NAME")); }
} catch (Exception e) {
e.printStackTrace();
} finally {
conn.close();
rs.close();
}
}
}
And if you use Maven, add this to your pom.xml:
<dependency>
<groupId>net.sourceforge.jtds</groupId>
<artifactId>jtds</artifactId>
<version>1.2.4</version>
</dependency>

jdbc:jtds:sqlserver://x.x.x.x/database replacing x.x.x.x with the IP or hostname of your SQL Server machine.
jdbc:jtds:sqlserver://MYPC/Blog;instance=SQLEXPRESS
or
jdbc:jtds:sqlserver://MYPC:1433/Blog;instance=SQLEXPRESS
If you are wanting to set the username and password in the connection string too instead of against a connection object separately:
jdbc:jtds:sqlserver://MYPC/Blog;instance=SQLEXPRESS;user=foo;password=bar
(Updated my incorrect information and add reference to the instance syntax)

A shot in the dark, but
From the looks of your error message, it seems that either the sqlserver instance is not running on port 1433 or something is blocking the requests to that port

SQLServer runs the default instance over port 1433. If you specify the port as port 1433, SQLServer will only look for the default instance. The name of the default instance was created at setup and usually is SQLEXPRESSxxx_xx_ENU.
The instance name also matches the folder name created in Program Files -> Microsoft SQL Server. So if you look there and see one folder named SQLEXPRESSxxx_xx_ENU it is the default instance.
Folders named MSSQL12.myInstanceName (for SQLServer 2012) are named instances in SQL Server and are not accessed via port 1433.
So if your program is accessing a default instance in the database, specify port 1433, and you may not need to specify the instance name.
If your program is accessing a named instance (not the default instance) in the database DO NOT specify the port but you must specify the instance name.
I hope this clarifies some of the confusion emanating from the errors above.

ORA-12505 :TNS listener does not currently know of SID given in connect descriptor

I am using Oracle database. I've written a small JDBC connection program in Java but I am facing an issue with the listener.
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
public class JdbcConnection {
public static void main(String[] args) throws SQLException,ClassNotFoundException {
String url = "jdbc:oracle:thin:#localhost:1521:orcl";
String user = "system";
String password = "password";
Connection connection = null;
Class.forName("oracle.jdbc.driver.OracleDriver");
connection = DriverManager.getConnection(url, user, password);
if(connection!=null){
System.out.println("Success in connnection");
} else {
System.out.println("failure in connection ");
}
}
}
I am getting the following exception:
C:\Users\Administrator\Desktop>java JdbcConnection
Exception in thread "main" java.sql.SQLException: Listener refused the connectio
n with the following error:
ORA-12505, TNS:listener does not currently know of SID given in connect descriptor
The Connection descriptor used by the client was:
localhost:1521:orcl
at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java
:112)
at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java
:261)
at oracle.jdbc.driver.T4CConnection.logon(T4CConnection.java:387)
at oracle.jdbc.driver.PhysicalConnection.<init>(PhysicalConnection.java:
441)
at oracle.jdbc.driver.T4CConnection.<init>(T4CConnection.java:165)
at oracle.jdbc.driver.T4CDriverExtension.getConnection(T4CDriverExtensio
n.java:35)
at oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java:801)
at java.sql.DriverManager.getConnection(Unknown Source)
at java.sql.DriverManager.getConnection(Unknown Source)
at JdbcConnection.main(JdbcConnection.java:18)
This is the output of lsnrctl status
LSNRCTL for 64-bit Windows: Version 12.1.0.1.0 - Production on 16-JUN-2015 13:43
:41
Copyright (c) 1991, 2013, Oracle. All rights reserved.
Welcome to LSNRCTL, type "help" for information.
LSNRCTL> status
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC1521)))
STATUS of the LISTENER
------------------------
Alias LISTENER
Version TNSLSNR for 64-bit Windows: Version 12.1.0.1.0 - Produ
ction
Start Date 16-JUN-2015 12:02:52
Uptime 0 days 1 hr. 40 min. 52 sec
Trace Level off
Security ON: Local OS Authentication
SNMP OFF
Listener Parameter File C:\app\orauser\product\12.1.0\dbhome_1\network\admin\l
istener.ora
Listener Log File C:\app\orauser\diag\tnslsnr\hydwemvm\listener\alert\lo
g.xml
Listening Endpoints Summary...
(DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(PIPENAME=\\.\pipe\EXTPROC1521ipc)))
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=hydwemvm)(PORT=1521)))
Services Summary...
Service "CLRExtProc" has 1 instance(s).
Instance "CLRExtProc", status UNKNOWN, has 1 handler(s) for this service...
The command completed successfully

If you know your oracle database SID, then use
jdbc:oracle:thin:#localhost:1521:orcl
otherwise use below in case you have service name
jdbc:oracle:thin:#localhost:1521/orcl
Also, make sure service name with the name ORCL should be up and running. If still doesn't work, then you need to restart your machine and try again above.
Still, not working ? Then, try following :
Login with SYSTEM user and register LOCAL_LISTENER by running below SQLs.
alter system set local_listener = '(ADDRESS=(PROTOCOL=TCP)(HOST=localhost)(PORT=1521))' scope = both;
alter system register;
How to check oracle SID and service name :
SELECT sys_context('USERENV', 'SID') FROM DUAL; -- It will return your oracle database SID
SELECT sys_context('USERENV', 'SERVICE_NAME') FROM DUAL; -- It will return your oracle database service name

If you want to know the default SID of your database use this query in sqlplus:
SELECT sys_context('USERENV', 'SID') FROM DUAL;
Use this value in the JDBC URL instead of "orcl".

Can you use the below URL?
Note the difference, this is to use the SERVICENAME instead of a SID.
jdbc:oracle:thin:#localhost:1521/orclservice

I am facing the same problem.
Try removing the LAN cable or disconnect your net connectivity and
restart the services of Listener and run the code.
It worked for me.