java.sql.SQLException:拒绝用户“root"@“localhost"的访问(使用密码:YES) [英] java.sql.SQLException: Access denied for user 'root'@'localhost' (using password: YES)
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问题描述
以下代码:
Class.forName("com.mysql.jdbc.Driver");Connection m_connection = DriverManager.getConnection("jdbc:mysql://localhost","root","root");
在 getConnection()
上抛出这个异常:
java.sql.SQLException: 用户 'root'@'localhost' 的访问被拒绝(使用密码:YES)在 com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1074)在 com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:4074)在 com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:4006)在 com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:919)在 com.mysql.jdbc.MysqlIO.proceedHandshakeWithPluggableAuthentication(MysqlIO.java:1694)在 com.mysql.jdbc.MysqlIO.doHandshake(MysqlIO.java:1244)在 com.mysql.jdbc.ConnectionImpl.coreConnect(ConnectionImpl.java:2397)在 com.mysql.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:2430)在 com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2215)在 com.mysql.jdbc.ConnectionImpl.(ConnectionImpl.java:813)在 com.mysql.jdbc.JDBC4Connection.(JDBC4Connection.java:47)在 sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)在 sun.reflect.NativeConstructorAccessorImpl.newInstance(来源不明)在 sun.reflect.DelegatingConstructorAccessorImpl.newInstance(未知来源)在 java.lang.reflect.Constructor.newInstance(Unknown Source)在 com.mysql.jdbc.Util.handleNewInstance(Util.java:411)在 com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:399)在 com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:334)在 java.sql.DriverManager.getConnection(Unknown Source)在 java.sql.DriverManager.getConnection(Unknown Source)在 db.Database.(Database.java:91)在 db.Main.main(Main.java:10)
这是怎么引起的,我该如何解决?
public static void main(String[] args) 抛出 ClassNotFoundException、ServletException、SQLException{尝试{Connection conn = (Connection) DriverManager.getConnection("jdbc:mysql://localhost/?user=root&password=rootpassword");语句 s = (Statement) conn.createStatement();int result = s.executeUpdate("创建数据库数据库名");}捕获(异常 e){e.printStackTrace();}}
产生:
java.sql.SQLException: 用户 'root'@'localhost' 的访问被拒绝(使用密码:YES)在 com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1074)在 com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:4074)在 com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:4006)在 com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:919)在 com.mysql.jdbc.MysqlIO.proceedHandshakeWithPluggableAuthentication(MysqlIO.java:1694)在 com.mysql.jdbc.MysqlIO.doHandshake(MysqlIO.java:1244)在 com.mysql.jdbc.ConnectionImpl.coreConnect(ConnectionImpl.java:2397)在 com.mysql.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:2430)在 com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2215)在 com.mysql.jdbc.ConnectionImpl.(ConnectionImpl.java:813)在 com.mysql.jdbc.JDBC4Connection.(JDBC4Connection.java:47)在 sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)在 sun.reflect.NativeConstructorAccessorImpl.newInstance(来源不明)在 sun.reflect.DelegatingConstructorAccessorImpl.newInstance(未知来源)在 java.lang.reflect.Constructor.newInstance(Unknown Source)在 com.mysql.jdbc.Util.handleNewInstance(Util.java:411)在 com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:399)在 com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:334)在 java.sql.DriverManager.getConnection(Unknown Source)在 java.sql.DriverManager.getConnection(Unknown Source)在 db.Main.main(Main.java:19)
解决方案
当您从头开始创建数据库时,您可以使用:
Connection connection = DriverManager.getConnection("jdbc:mysql://localhost/?user=root&password=rootpassword");PreparedStatement ps = connection.prepareStatement("CREATE DATABASE databasename");int 结果 = ps.executeUpdate();
这是一个相同的场景.>
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)
解决方案
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.
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