Derby データベースに接続すると、「SQLException: jdbc:derby://localhost:1527 に適したドライバーが見つかりません」というエラーが発生するのはなぜですか?

SQLException: No Suitable Driver Found for jdbc:derby://localhost:1527

Problem:

When attempting to connect to a Derby database through a Java application, you encounter the following error:

java.sql.SQLException: No suitable driver found for jdbc:derby://localhost:1527/

Causes:

This exception typically arises from one of two issues:

• Missing Driver: The JDBC driver required to connect to the Derby database has not been loaded.
• Malformed JDBC URL: The provided JDBC URL is incomplete or incorrect in its syntax.

Solution:

Loading the Driver:

Ensure that the Derby client JDBC driver (derbyclient.jar) is included in your application's classpath. Then, explicitly load the driver using the following line of code:

Class.forName("org.apache.derby.jdbc.ClientDriver");

JDBC URL Configuration:

Next, verify the syntax of the JDBC URL. Specifically, make sure that it includes the following components:

• jdbc:derby://: The protocol identifier
• localhost: The host address
• 1527: The port number
• Database Name: The name of the database to connect to
• Optional Parameters: Additional parameters, such as create=true to create the database if it does not exist

For example, the following JDBC URL would connect to a database named "mydb" with create=true:

jdbc:derby://localhost:1527/mydb;create=true

Additional Checks:

Since you are working in server mode, double-check the following:

• Derbyclient.jar is on your classpath.
• You are loading the correct driver, org.apache.derby.jdbc.ClientDriver.

以上がDerby データベースに接続すると、「SQLException: jdbc:derby://localhost:1527 に適したドライバーが見つかりません」というエラーが発生するのはなぜですか?の詳細内容です。詳細については、PHP 中国語 Web サイトの他の関連記事を参照してください。