最佳答案
如何修复: “没有找到适合 jdbc: mysql://localhost/dbname 的驱动程序”错误时使用池？
我试图创建一个到我的数据库的连接，当我使用 main 方法测试我的代码时，它可以无缝地工作。然而，当尝试通过 Tomcat 7访问它时，它失败了，并且出现了错误:
No suitable driver found for jdbc:mysql://localhost/dbname.
我正在使用共享。我在 WEB-INF/lib 和 in 中放入 mysql 连接器(5.1.15)、 dbcp (1.4)和 pool (1.4.5)库。还有类路径。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;
}
}
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？
