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我正在尝试创建到我的数据库的连接，当我使用 main 方法测试我的代码时，它可以无缝运行。但是，当尝试通过 Tomcat 7 访问它时，它失败并出现错误:
No suitable driver found for jdbc:mysql://localhost/dbname.
我正在使用池化。我在 WEB-INF/lib 和 .classpath 中也放入了 mysql 连接器 (5.1.15)、dbcp (1.4) 和 pool(1.4.5) 库。我正在使用 Eclipse IDE。我的数据库驱动程序代码是:
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import org.apache.tomcat.dbcp.dbcp.ConnectionFactory;
import org.apache.tomcat.dbcp.dbcp.DriverManagerConnectionFactory;
import org.apache.tomcat.dbcp.dbcp.PoolableConnectionFactory;
import org.apache.tomcat.dbcp.dbcp.PoolingDriver;
import org.apache.tomcat.dbcp.pool.impl.GenericObjectPool;
public class DatabaseConnector {
public static String DB_URI = "jdbc:mysql://localhost/dbname";
public static String DB_USER = "test";
public static String DB_PASS = "password";
// Singleton instance
protected static DatabaseConnector _instance;
protected String _uri;
protected String _username;
protected String _password;
/**
* Singleton, so no public constructor
*/
protected DatabaseConnector(String uri, String username, String password) {
_uri = uri;
_username = username;
_password = password;
GenericObjectPool connectionPool = new GenericObjectPool(null);
ConnectionFactory connectionFactory = new DriverManagerConnectionFactory(
_uri, _username, _password);
PoolableConnectionFactory poolableConnectionFactory =
new PoolableConnectionFactory(connectionFactory, connectionPool,
null, null, false, true);
PoolingDriver driver = new PoolingDriver();
driver.registerPool("test", connectionPool);
}
/**
* Returns the singleton instance
*/
public static DatabaseConnector getInstance() {
if (_instance == null) {
_instance = new DatabaseConnector(DB_URI, DB_USER, DB_PASS);
}
return _instance;
}
/**
* Returns a connection to the database
*/
public Connection getConnection() {
Connection con = null;
try {
con = DriverManager.getConnection("jdbc:apache:commons:dbcp:test");
} catch (SQLException e) {
throw new RuntimeException(e);
}
return con;
}
}
我的堆栈跟踪的开始:
Apr 5, 2011 9:49:14 PM org.apache.catalina.core.StandardWrapperValve invoke
SEVERE: Servlet.service() for servlet [Login] in context with path [/Project]
threw exception
java.lang.RuntimeException: java.sql.SQLException:
No suitable driver found for jdbc:mysql://localhost/dbname
是什么导致了这个错误？