我尝试使用连接器8.0.11连接MySQL数据库与Java。一切似乎都很好,但我得到这个异常:

Exception in thread "main" java.sql.SQLNonTransientConnectionException: Public Key Retrieval is not allowed at
     com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:108) at 
     com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:95) at
     com.mysql.cj.jdbc.exceptions.SQLExceptionsMapping.translateException(SQLExceptionsMapping.java:122) at     
     com.mysql.cj.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:862) at 
     com.mysql.cj.jdbc.ConnectionImpl.(ConnectionImpl.java:444) at
     com.mysql.cj.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:230) at
     com.mysql.cj.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:226) at
     com.mysql.cj.jdbc.MysqlDataSource.getConnection(MysqlDataSource.java:438) at
     com.mysql.cj.jdbc.MysqlDataSource.getConnection(MysqlDataSource.java:146) at
     com.mysql.cj.jdbc.MysqlDataSource.getConnection(MysqlDataSource.java:119) at
     ConnectionManager.getConnection(ConnectionManager.java:28) at
     Main.main(Main.java:8)
 

下面是我的Connection Manager类:

public class ConnectionManager {

    public static final String serverTimeZone = "UTC";
    public static final String serverName = "localhost";
    public static final String databaseName ="biblioteka";
    public static final int portNumber = 3306;
    public static final String user = "anyroot";
    public static final String password = "anyroot";
    
    public static Connection getConnection() throws SQLException {
    
        MysqlDataSource dataSource = new MysqlDataSource();
    
        dataSource.setUseSSL( false );
        dataSource.setServerTimezone( serverTimeZone );
        dataSource.setServerName( serverName );
        dataSource.setDatabaseName( databaseName );
        dataSource.setPortNumber( portNumber );
        dataSource.setUser( user );
        dataSource.setPassword( password );
        
        return dataSource.getConnection();
    }
}

当前回答

给出连接URL jdbc: mysql: / / localhost: 3306 / hb_student_tracker吗?allowPublicKeyRetrieval = true&useSSL = false&serverTimezone = UTC

其他回答

更新useSSL=true在春季启动应用程序连接mysql;

jdbc:mysql://localhost:3306/demo?useUnicode=true&characterEncoding=utf8&useSSL=true&useLegacyDatetimeCode=false&serverTimezone=UTC

当从DBeaver这样做时,我必须去“连接设置”->“SSL”选项卡,然后:

取消选中“验证服务器证书” 检查“允许公钥检索”

这就是它的样子。

注意,这只适用于本地开发。

作为建议的答案,您可以尝试使用mysql_native_password身份验证插件而不是caching_sha2_password身份验证插件。

ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY 'your_password_here'; 

首先,请确保您的数据库服务器已启动并运行。 我得到了同样的错误,在尝试了这里列出的所有答案后,我发现我的数据库服务器没有运行。

您可以从MySQL工作台或命令行中检查相同的使用

mysql -u USERNAME -p

这听起来很明显,但很多时候我们假设数据库服务器一直在运行,特别是当我们在本地机器上工作时,当我们重新启动/关闭机器时,数据库服务器将自动关闭。

spring.datasource.url=jdbc:mysql://localhost:3306/database?createDatabaseIfNotExist=true&allowPublicKeyRetrieval=true&useSSL=false

您可以将这一行插入到应用程序中。属性文件,这意味着,

spring.datasource.url=jdbc:mysql://localhost:3306/ This one uses mysql as the database service. I think this can changed by using relavent name and the port of your database name. database?createDatabaseIfNotExist=true = use the database named database if you haven't already make a database like that, make a new one. allowPublicKeyRetrieval=true = to allow the client to automatically request the public key from the server. (This part might be additional) useSSL=false = This will disable SSL and also suppress the SSL errors

此外,要警惕同一文件中的spring.jpa.database-platform=org.hibernate.dialect.MySQL8Dialect属性。

最后检查是否在pom.xml文件的dependencies中添加了以下依赖项。

<dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
        <version>8.0.23</version>
</dependency>