如何解决“无法为连接URL创建类'com.mysql.jdbc.Driver'的JDBC驱动程序" [英] How to resolve "Cannot create JDBC driver of class 'com.mysql.jdbc.Driver' for connect URL"

问题描述

首先，我想说的是，我在stackoverflow上检查了所有答案，但我无法修复此错误！请帮帮我！我花了很多时间，但没有结果. 我正在尝试使用Tomcat8创建连接池. 我有一个例外:

Firstly I want to say that i checked all answers at stackoverflow, and i can't fix this bug! Help me please! I spend a lot of time, but no result. I'm trying to create connection pool using Tomcat8. I have an exception:

java.sql.SQLException:无法创建类的JDBC驱动程序 "com.mysql.jdbc.Driver"用于连接URL 'jdbc:mysql:/localhost:3306/autopark'在 org.apache.tomcat.dbcp.dbcp2.BasicDataSource.createConnectionFactory(BasicDataSource.java:2160) 在 org.apache.tomcat.dbcp.dbcp2.BasicDataSource.createDataSource(BasicDataSource.java:2032) 在 org.apache.tomcat.dbcp.dbcp2.BasicDataSource.getConnection(BasicDataSource.java:1532) 在ua.khpi.shapoval.db.DbConnector.init(DbConnector.java:31)处 ua.khpi.shapoval.db.DbContextListner.contextInitialized(DbContextListner.java:48) 在 org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4842) 在 org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5303) 在 org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:147) 在 org.apache.catalina.core.ContainerBase $ StartChild.call(ContainerBase.java:1407) 在 org.apache.catalina.core.ContainerBase $ StartChild.call(ContainerBase.java:1397) 在java.util.concurrent.FutureTask.run(FutureTask.java:266)在 java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) 在 java.util.concurrent.ThreadPoolExecutor $ Worker.run(ThreadPoolExecutor.java:617) 在java.lang.Thread.run(Thread.java:745)造成原因: java.sql.SQLException:在以下位置没有合适的驱动程序 org.apache.tomcat.dbcp.dbcp2.BasicDataSource.createConnectionFactory(BasicDataSource.java:2151) ...还有13个

java.sql.SQLException: Cannot create JDBC driver of class 'com.mysql.jdbc.Driver' for connect URL 'jdbc:mysql:/localhost:3306/autopark' at org.apache.tomcat.dbcp.dbcp2.BasicDataSource.createConnectionFactory(BasicDataSource.java:2160) at org.apache.tomcat.dbcp.dbcp2.BasicDataSource.createDataSource(BasicDataSource.java:2032) at org.apache.tomcat.dbcp.dbcp2.BasicDataSource.getConnection(BasicDataSource.java:1532) at ua.khpi.shapoval.db.DbConnector.init(DbConnector.java:31) at ua.khpi.shapoval.db.DbContextListner.contextInitialized(DbContextListner.java:48) at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4842) at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5303) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:147) at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1407) at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1397) at java.util.concurrent.FutureTask.run(FutureTask.java:266) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) at java.lang.Thread.run(Thread.java:745) Caused by: java.sql.SQLException: No suitable driver at org.apache.tomcat.dbcp.dbcp2.BasicDataSource.createConnectionFactory(BasicDataSource.java:2151) ... 13 more

DbConnector.class

public class DbConnector {
    private static Logger log = Logger.getLogger(DbConnector.class.getName());
    private static DataSource dataSource;
    private static Connection connection;

    public static void init() throws ServletException, SQLException, NamingException, ClassNotFoundException {

        Context initCtx = new InitialContext();

        Context envCtx = (Context) initCtx.lookup("java:comp/env/");

        DataSource ds = (DataSource) envCtx.lookup("jdbc/autopark");
        System.out.println(ds.getConnection());
    }

    public static Connection getConnection() throws SQLException {

        return dataSource.getConnection();
    }

}

位于META-INF文件夹中的

context.xml

context.xml that located in META-INF folder

    <?xml version="1.0" encoding="UTF-8"?>
<Context crossContext="true" reloadable="true">
    <Resource name="jdbc/autopark" auth="Container" type="javax.sql.DataSource"
        username="root" password="161acid161" driverClassName="com.mysql.jdbc.Driver"
        url="jdbc:mysql:/localhost:3306/autopark" maxActive="15" maxIdle="3" />
    <ResourceLink name="jdbc/autopark" global="jdbc/autopark"

        type="javax.sql.DataSource" />

</Context>

web.xml 文件

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns="http://xmlns.jcp.org/xml/ns/javaee"
    xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
    id="WebApp_ID" version="3.1">
    <display-name>Autostation</display-name>
    <welcome-file-list>

        <welcome-file>index.jsp</welcome-file>

    </welcome-file-list>


        <resource-ref>

            <description>Db</description>

            <res-ref-name>jdbc/autopark</res-ref-name>

            <res-type>javax.sql.DataSource</res-type>

            <res-auth>Container</res-auth>

        </resource-ref>


    <listener>
        <listener-class>ua.khpi.shapoval.db.DbContextListner</listener-class>
    </listener>
</web-app>

我的 tomcat/lib 目录的内容和我的项目结构.

Content of my tomcat/lib directory and my project structure.

推荐答案

JDBC URL不正确，实际上您缺少斜杠，因此请尝试以下操作:

The JDBC URL is not correct, indeed you have a missing slash so try this:

jdbc:mysql://localhost:3306/autopark

如果检查得很好，真正的错误是没有合适的驱动程序，这意味着它找不到支持所提供URL的任何JDBC驱动程序.

If you check well the real error is No suitable driver which means that it cannot find any JDBC driver that supports the provided URL.

这篇关于如何解决“无法为连接URL创建类'com.mysql.jdbc.Driver'的JDBC驱动程序"的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！