如何解决“无法为连接URL创建类'com.mysql.jdbc.Driver'的JDBC驱动程序”

时间:2016-08-04 17:55:49

标签: java apache tomcat jdbc connection-pooling

首先,我想说我检查了stackoverflow的所有答案,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:

  

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'at   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)at   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)at   java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)     在   java.util.concurrent.ThreadPoolExecutor中的$ Worker.run(ThreadPoolExecutor.java:617)     在java.lang.Thread.run(Thread.java:745)引起:   java.sql.SQLException:没有合适的驱动程序   org.apache.tomcat.dbcp.dbcp2.BasicDataSource.createConnectionFactory(BasicDataSource.java:2151)     ......还有13个

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();
    }

}

context.xml 位于META-INF文件夹

    <?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 目录和我的项目结构的内容。 enter image description here

enter image description here

1 个答案:

答案 0 :(得分:10)

JDBC URL不正确,实际上你有一个丢失的斜杠,所以试试这个:

jdbc:mysql://localhost:3306/autopark

如果检查一下,真正的错误是No suitable driver,这意味着它找不到任何支持提供的URL的JDBC驱动程序。