java.sql.SQLException: Access denied for user 'root'@'localhost' (using password: YES)

问题

The following code:

Class.forName("com.mysql.jdbc.Driver");
Connection m_connection = DriverManager.getConnection("jdbc:mysql://localhost","root","root");

Throws this exception on getConnection():

java.sql.SQLException: Access denied for user 'root'@'localhost' (using password: YES)
    at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1074)
    at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:4074)
    at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:4006)
    at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:919)
    at com.mysql.jdbc.MysqlIO.proceedHandshakeWithPluggableAuthentication(MysqlIO.java:1694)
    at com.mysql.jdbc.MysqlIO.doHandshake(MysqlIO.java:1244)
    at com.mysql.jdbc.ConnectionImpl.coreConnect(ConnectionImpl.java:2397)
    at com.mysql.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:2430)
    at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2215)
    at com.mysql.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:813)
    at com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:47)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
    at java.lang.reflect.Constructor.newInstance(Unknown Source)
    at com.mysql.jdbc.Util.handleNewInstance(Util.java:411)
    at com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:399)
    at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:334)
    at java.sql.DriverManager.getConnection(Unknown Source)
    at java.sql.DriverManager.getConnection(Unknown Source)
    at db.Database.<init>(Database.java:91)
    at db.Main.main(Main.java:10)

How is this caused and how can I solve it?

EDIT:

    public static void main(String[] args) throws ClassNotFoundException, ServletException, SQLException 
    {

        try
        {
            Connection conn = (Connection) DriverManager.getConnection("jdbc:mysql://localhost/?user=root&password=rootpassword"); 
            Statement   s = (Statement) conn.createStatement();
            int result = s.executeUpdate("CREATE DATABASE databasename");
        }


        catch ( Exception e)
        {
            e.printStackTrace();
        }
}

Produces :

java.sql.SQLException: Access denied for user 'root'@'localhost' (using password: YES)
    at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1074)
    at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:4074)
    at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:4006)
    at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:919)
    at com.mysql.jdbc.MysqlIO.proceedHandshakeWithPluggableAuthentication(MysqlIO.java:1694)
    at com.mysql.jdbc.MysqlIO.doHandshake(MysqlIO.java:1244)
    at com.mysql.jdbc.ConnectionImpl.coreConnect(ConnectionImpl.java:2397)
    at com.mysql.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:2430)
    at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2215)
    at com.mysql.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:813)
    at com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:47)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
    at java.lang.reflect.Constructor.newInstance(Unknown Source)
    at com.mysql.jdbc.Util.handleNewInstance(Util.java:411)
    at com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:399)
    at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:334)
    at java.sql.DriverManager.getConnection(Unknown Source)
    at java.sql.DriverManager.getConnection(Unknown Source)
    at db.Main.main(Main.java:19)

回答1:

As you are creating a database from scratch, you could use:

Connection connection = DriverManager.getConnection("jdbc:mysql://localhost/?user=root&password=rootpassword"); 
PreparedStatement ps = connection.prepareStatement("CREATE DATABASE databasename");
int result = ps.executeUpdate();

Here is an identical scenario.

回答2:

This can help you:

GRANT ALL PRIVILEGES ON *.* TO 'root'@'localhost' IDENTIFIED BY '%password%' WITH GRANT OPTION;

Execute it with command line or some GUI tool.

Don't forget to replace %password% with real password.

回答3:

I had a similar problem, but the differemce was: I didn't executed my JavaApp from localhost, but from a remote PC. So I got something like java.sql.SQLException: Access denied for user 'root'@'a.remote.ip.adress' (using password: YES) To solve this, you can simply login to phpMyAdmin, go to Users, click add user and enter the host from which you want to execute your JavaApp (or choose Any Host)

回答4:

you can use this

   static final String JDBC_DRIVER = "com.mysql.jdbc.Driver";  
   static final String DB_URL = "jdbc:mysql://localhost:3306/YOUR_DB_NAME";


   static final String USER = "root";
   static final String PASS = "YOUR_ROOT_PASSWORD"; 

  Connection conn = DriverManager.getConnection(DB_URL,USER,PASS);

you have to give the right root password .

回答5:

This is specific to Ubuntu 18.04 LTS and MySQL 5.x Followed this link Follow everything from here onwards:

sudo mysql_secure_installation

sudo mysql

Once logged into MySQL then from the MySQL prompt execute these commands:

ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY 'password';
FLUSH PRIVILEGES;

Now verify that the table has the password for the root

SELECT user,authentication_string,plugin,host FROM mysql.user;

This solved my issue and now i am able to login.

回答6:

You should specify the db you are connecting to:

jdbc:mysql://localhost:3306/mydb

回答7:

I had the same issue "java.sql.SQLException: Access denied for user 'root'@'localhost' (using password: YES)". Problem was "WRONG PASSWORD". Copy and paste the query as-it-is in the shell to check whether it gives the desired output or not. Small errors consumes more time.

回答8:

I was hitting the same issue. Added mysql service port number(3307), resolved the issue.

conn = DriverManager.getConnection("jdbc:mysql://localhost:3307/?" + "user=root&password=password");

回答9:

Try it like this....

public static Connection getConnection() throws SQLException{

    String driver = "com.mysql.jdbc.Driver";
    String url    = "jdbc:mysql://localhost:3306/test";
    String username = "root";
    String password = "vicky";            // Change it to your Password
    System.setProperty(driver,"");

    return DriverManager.getConnection(url,username,password);
}

回答10:

Although this may not be the cause of your issue, you'll get the same error if there are two MySQL services running on the same port. You can check on windows by looking at the list of services in the services tab of Task Manager.

回答11:

This Exception is also caused due to version mismatch of mysql db and your pom.xml/jar.

Make sure your pom.xml/jar version is higher than your mysql db version. Because higher versions are compatible with lower version's, but the same is not true for the inverse.

Solution's for java project

Replace the Jar with suitable version.

Solution for maven based

Change the dependency Version in pom.xml

Solution for spring boot - Override the spring boot dependency by adding 5.1.5.Final

回答12:

This appears to mostly happens when the MySQL username and password are not correct. Check your MySQL username and password.

回答13:

I had to change my SQL setup (in my host, Dreamhost in my case) to allow the username to access the database from other hosts, not just Dreamhost since I'm running a program from the IDE on my computer. I did that for now by adding % to the list of Allowable Hosts. It now works!

回答14:

If you are connecting a remote mysql server from your local machine using java see the below steps. Error : "java.sql.SQLException: Access denied for user 'xxxxx'@'101.123.163.141' (using password: YES) "

for remote access may be cpanel or others grant the remote access for your local ip address.

In the above error message: "101.123.163.141" is my local machine ip. So First we have to give remote access in the Cpanel-> Remote MySQL®. Then run your application to connect.

Class.forName("com.mysql.jdbc.Driver");  
Connection con=DriverManager.getConnection(  
    "jdbc:mysql://www.xyz.com/abc","def","ghi");  
//here abc is database name, def is username and ghi        
Statement stmt=con.createStatement();  
ResultSet rs=stmt.executeQuery("select * from employee");  
    while(rs.next())  
        System.out.println(rs.getInt(1)+" "+rs.getString(2)+"  
                          "+rs.getString(3));  
con.close();

Hope it will resolve your issue.

Thanks

回答15:

The order of declaring:

Driver
Connection string
username
password

If we declaring in order

Connection string
username
password
Driver

the application will fail

回答16:

I encountered this error. The problem was that I had the wrong database name.

回答17:

I also have this problem, this solved it.

Change the:

Sring url = "jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=UTF-8&serverTimezone=UTC&user=root&password=password";

Set:

"serverTimezone=UTC" is "Unified standard world time". "useUnicode=true&characterEncoding=UTF-8" is "Solve Chinese garbled".

Although my database have not any Chinese words. But it is working. Reference from https://www.cnblogs.com/EasonJim/p/6906713.html

来源：https://stackoverflow.com/questions/11922323/java-sql-sqlexception-access-denied-for-user-rootlocalhost-using-password

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java

mysql

exception

jdbc

connection