1. Error information

Feb 02, 2022 10:44:44 AM com.alibaba.druid.pool.DruidDataSource error
WARNING: init datasource error, url: jdbc:mysql://localhost:3306/xuesheng?useSSL=false&useUnicode=true&characterEncoding=utf-8&serverTimezone=Asia/Shanghai
java.sql.SQLException: Access denied for user ''@'localhost' (using password: YES)
	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:198)
	at com.alibaba.druid.pool.DruidAbstractDataSource.createPhysicalConnection(DruidAbstractDataSource.java:1570)
	at com.alibaba.druid.pool.DruidAbstractDataSource.createPhysicalConnection(DruidAbstractDataSource.java:1636)
	at com.alibaba.druid.pool.DruidDataSource.init(DruidDataSource.java:874)
	at com.alibaba.druid.pool.DruidDataSource.getConnection(DruidDataSource.java:1246)
	at com.alibaba.druid.pool.DruidDataSource.getConnection(DruidDataSource.java:1242)
	at com.alibaba.druid.pool.DruidDataSource.getConnection(DruidDataSource.java:89)
	at com.qzxiaofeng.jdbc.DruidDemo.main(DruidDemo.java:21)

Feb 02, 2022 10:44:44 AM com.alibaba.druid.pool.DruidDataSource error
WARNING: {dataSource-1} init error
java.sql.SQLException: Access denied for user ''@'localhost' (using password: YES)
	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:198)
	at com.alibaba.druid.pool.DruidAbstractDataSource.createPhysicalConnection(DruidAbstractDataSource.java:1570)
	at com.alibaba.druid.pool.DruidAbstractDataSource.createPhysicalConnection(DruidAbstractDataSource.java:1636)
	at com.alibaba.druid.pool.DruidDataSource.init(DruidDataSource.java:874)
	at com.alibaba.druid.pool.DruidDataSource.getConnection(DruidDataSource.java:1246)
	at com.alibaba.druid.pool.DruidDataSource.getConnection(DruidDataSource.java:1242)
	at com.alibaba.druid.pool.DruidDataSource.getConnection(DruidDataSource.java:89)
	at com.qzxiaofeng.jdbc.DruidDemo.main(DruidDemo.java:21)

Feb 02, 2022 10:44:44 AM com.alibaba.druid.pool.DruidDataSource info
WARNING: {dataSource-1} inited
Exception in thread "main" java.sql.SQLException: Access denied for user ''@'localhost' (using password: YES)
	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:198)
	at com.alibaba.druid.pool.DruidAbstractDataSource.createPhysicalConnection(DruidAbstractDataSource.java:1570)
	at com.alibaba.druid.pool.DruidAbstractDataSource.createPhysicalConnection(DruidAbstractDataSource.java:1636)
	at com.alibaba.druid.pool.DruidDataSource.init(DruidDataSource.java:874)
	at com.alibaba.druid.pool.DruidDataSource.getConnection(DruidDataSource.java:1246)
	at com.alibaba.druid.pool.DruidDataSource.getConnection(DruidDataSource.java:1242)
	at com.alibaba.druid.pool.DruidDataSource.getConnection(DruidDataSource.java:89)
	at com.qzxiaofeng.jdbc.DruidDemo.main(DruidDemo.java:21)

II My configuration is as follows
1 Test code

public class DruidDemo {
    public static void main(String[] args) throws Exception {

        //3.Load the configuration file
        Properties prop=new Properties();
        prop.load(new FileInputStream("src/druid.properties"));
        //4. Get the connection pool object
        DataSource dataSource = DruidDataSourceFactory.createDataSource(prop);
        //5. Get the corresponding database connection
        Connection connection = dataSource.getConnection();
        System.out.println(connection);

//        System.out.println(System.getProperty("user.dir"));
    }
}

2. Configuration of guide package in maven

<!--         druid-->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
            <version>1.1.12</version>
        </dependency>

3.druid.properties configuration

driverClassName=com.mysql.cj.jdbc.Driver
url=jdbc:mysql://localhost:3306/xuesheng?useSSL=false&useUnicode=true&characterEncoding=utf-8&serverTimezone=Asia/Shanghai
user=root
password=123456
# initialize the number of connections
initialSize=5
#Maximum number of connections
maxActive=10
#Maximum waiting time
maxWait=3000

3. Solution

Change the user to username in druid.properties