Why Can't I Connect to MySQL Due to a `ClassCastException: java.math.BigInteger Cannot Be Cast to java.lang.Long`?-Mysql Tutorial-php.cn

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Why Can't I Connect to MySQL Due to a `ClassCastException: java.math.BigInteger Cannot Be Cast to java.lang.Long`?

Linda Hamilton

Dec 13, 2024 am 11:21 AM

Why Can't I Connect to MySQL Due to a `ClassCastException: java.math.BigInteger Cannot Be Cast to java.lang.Long`?

ClassCastException: java.math.BigInteger Cannot Be Cast to java.lang.Long on Connect to MySQL

Problem:

When attempting to connect to a MySQL database using Java, an error occurs:

java.sql.SQLException: java.lang.ClassCastException: java.math.BigInteger cannot be cast to java.lang.Long

Answer:

This error indicates an issue with the casting of a java.math.BigInteger object to a java.lang.Long object during the connection process. It suggests a mismatch between your MySQL version and the version of the mysql-connector.jar library.

Solution:

To resolve this issue, follow these steps:

Check your MySQL version. The error is known to occur with certain combinations of MySQL versions and mysql-connector.jar versions.
Upgrade your mysql-connector.jar to the latest version. Refer to the MySQL Connector/J website (https://dev.mysql.com/downloads/connector/j/) for the latest version.
Ensure that your MySQL version and mysql-connector.jar version are compatible. For example, if you are using MySQL 8.0.11, upgrade to mysql-connector.jar 5.1.47 or 8.0.12.
Recompile and rerun your Java program to establish the connection.

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