Question

我正在使用mysql与我的数据库建立连接。代码工作正常，但如果我输入错误的用户名/传递/主机/数据库，我可以得到一个日志消息，该部分是错误的？这是代码：

private void connectDatabase()
{
    try {
        connection = DriverManager.getConnection("jdbc:mysql://" + hostname + ":" + port + "/"
                + database + "?autoReconnect=true", username, password);
        System.out.println("[MySQL] The connection to MySQL is made!");
    } catch (SQLException e) {
        System.out.println("[MySQL] The connection to MySQL couldn't be made! reason: "
                        + e.getMessage());
    }
}

Ex：我输入了错误的密码，我收到了这个错误日志：

[MySQL] The connection to MySQL couldn't be made! reason: Wrong password.

这可能吗？

Answer 1

对于MySQL，您将获得一个SQLExcpetion，如下所示：

Caused by: java.sql.SQLException: Access denied for user 'root'@'localhost' (using password: YES)
    at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1073) ~[mysql-connector-java-5.1.18.jar:na]
    at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3609) ~[mysql-connector-java-5.1.18.jar:na]
    at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3541) ~[mysql-connector-java-5.1.18.jar:na]
    at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:943) ~[mysql-connector-java-5.1.18.jar:na]
    at com.mysql.jdbc.MysqlIO.secureAuth411(MysqlIO.java:4113) ~[mysql-connector-java-5.1.18.jar:na]
...

SQLException将具有SQLState = 28000和vendorCode = 1045

Java＆amp; MySQL可以有调试日志吗？

1 个答案: