Eclipse使用jdbc连接MySql数据库报：java.sql.SQLException: Access denied for user 'root'@'localhost' (using password: YES)，

Eclipse使用jdbc连接MySql数据库报：java.sql.SQLException: Access denied for user 'root'@'localhost' (using password: YES)，

在使用eclipse连接mysql数据库时报异常： 

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

    at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1073)

    at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3609)

    at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3541)

    at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:943)

    at com.mysql.jdbc.MysqlIO.secureAuth411(MysqlIO.java:4113)

    at com.mysql.jdbc.MysqlIO.doHandshake(MysqlIO.java:1308)

    at com.mysql.jdbc.ConnectionImpl.coreConnect(ConnectionImpl.java:2336)

    at com.mysql.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:2369)

    at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2153)

    at com.mysql.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:792)

    at com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:47)

    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)

    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)

    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)

    at java.lang.reflect.Constructor.newInstance(Constructor.java:526)

    at com.mysql.jdbc.Util.handleNewInstance(Util.java:411)

    at com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:381)

    at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:305)

    at java.sql.DriverManager.getConnection(DriverManager.java:571)

    at java.sql.DriverManager.getConnection(DriverManager.java:233)

    at cn.itcast.mybatis.jdbc.jdbcTest.main(jdbcTest.java:36)

 jdk版本：1.7.0_79，mysql为5.7，使用mysql-connector-java-5.1.18.jar。

代码如下：

import java.sql.Connection; import java.sql.DriverManager; import java.sql.PreparedStatement; import java.sql.ResultSet; import java.sql.SQLException; /** * * @author lilia * */ public class jdbcTest { //mysql数据库地址 private static final String url = "jdbc:mysql://localhost:3306/mybatis?characterEncoding=utf-8"; //mysql数据库用户名 private static final String username = "root"; //myslq数据库密码 private static final String password = "root"; public static void main(String[] args) { //数据库连接 Connection connection = null; //预编译的statement（使用预编译的statement可以提高数据库的性能） PreparedStatement preparedStatement = null; //结果集对象 ResultSet resultSet = null; try { //加载数据驱动 Class.forName("com.mysql.jdbc.Driver"); //通过驱动管理类获取数据库连接 connection = DriverManager.getConnection(url, username, password); //定义sql语句 String sql = "select * from user where username = ?"; //获取预处理statement，并把sql放入到statement中。 preparedStatement = connection.prepareStatement(sql); //参数赋值，序号从1开始 preparedStatement.setString(1, "王五"); //向数据库发出sql执行查询，并返回查询结果集 resultSet = preparedStatement.executeQuery(); while (resultSet.next()) { System.out.println(resultSet.getString("id") + ":" + resultSet.getString("username")); } } catch (Exception e) { e.printStackTrace(); } finally { //释放资源 if (resultSet != null) { try { resultSet.close(); } catch (SQLException e) { e.printStackTrace(); } } if(preparedStatement != null){ try { preparedStatement.close(); } catch (SQLException e) { e.printStackTrace(); } } if(connection != null){ try { connection.close(); } catch (SQLException e) { e.printStackTrace(); } } } } } View Code

 

执行后报错如上。

网上搜索很多解决方案行不通，最终找到问题所在：root帐户默认不开放远程访问权限，所以需要修改一下相关权限。，参考：https://blog.csdn.net/jack__love/article/details/79019049

具体解决步骤如下：

 

问题解决。