Java连接Mysql数据库异常：Public Key Retrieval is not allowed

堆栈跟踪：

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)

连接代码：

public class ConnectionManager {    public static final String serverTimeZone = "UTC";    public static final String serverName = "localhost";    public static final String databaseName ="mysqldb";    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();    }}

解决异常问题

解决此异常问题需要将allowPublicKeyRetrieval=true和useSSL=false。

1）通过代码设置

dataSource.setAllowPublicKeyRetrieval(true);
dataSource.setUseSSL(false);

2）jdbc的url设置

jdbc:mysql://localhost:3306/Database_dbName?allowPublicKeyRetrieval=true&useSSL=false;

3）Spring boot配置

spring.datasource.url=jdbc:mysql://localhost:3306/db-name?useUnicode=true&characterEncoding=UTF-8&allowPublicKeyRetrieval=true&useSSL=falsespring.datasource.username=rootspring.datasource.password=root