package cn.itcast.jdbc;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.Statement;

public class Dbunit {
	
	
	private static final String URl ="jdbc:mysql://localhost:3306/admin";
	private static final String USRE="admin";
	private static final String PASSWORD="admin";
	
	public static void main(String[] args) throws Exception {
		
		Class.forName("com.mysql.jdbc.Driver");
		
		Connection conn = DriverManager.getConnection(URl, USRE, PASSWORD);
		
		Statement stmt = conn.createStatement();
		ResultSet rs = stmt.executeQuery("select * from students");
		
		while(rs.next()){
			System.out.println(rs.getInt("ID") + rs.getString("name"));
		}
	}

}



Exception in thread "main" java.sql.SQLException: Access denied for user 'admin'@'localhost' (using password: NO)
	at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:957)
	at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3878)
	at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3814)
	at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:871)
	at com.mysql.jdbc.MysqlIO.proceedHandshakeWithPluggableAuthentication(MysqlIO.java:1694)
	at com.mysql.jdbc.MysqlIO.doHandshake(MysqlIO.java:1215)
	at com.mysql.jdbc.ConnectionImpl.coreConnect(ConnectionImpl.java:2255)
	at com.mysql.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:2286)
	at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2085)
	at com.mysql.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:795)
	at com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:44)
	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:404)
	at com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:400)
	at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:327)
	at java.sql.DriverManager.getConnection(Unknown Source)
	at java.sql.DriverManager.getConnection(Unknown Source)
	at cn.itcast.jdbc.Dbunit.main(Dbunit.java:19)