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org.apache.tomcat.dbcp.dbcp.SQLNestedException：无法创建类“”的 JDBC 驱动程序对于连接 URL“null”

发布于 2024-10-20 02:19:16 字数 5862 浏览 5 评论 0原文

你好 当我尝试使用 JNDI 连接到数据源时，出现以下错误：

    [org.apache.tomcat.dbcp.dbcp.SQLNestedException: Cannot create JDBC driver of class '' for connect URL 'null'
    at org.apache.tomcat.dbcp.dbcp.BasicDataSource.createConnectionFactory(BasicDataSource.java:1452)
    at org.apache.tomcat.dbcp.dbcp.BasicDataSource.createDataSource(BasicDataSource.java:1371)
    at org.apache.tomcat.dbcp.dbcp.BasicDataSource.getConnection(BasicDataSource.java:1044)
    at org.apache.roller.weblogger.business.DatabaseProvider.getConnection(DatabaseProvider.java:179)
    at org.apache.roller.weblogger.business.DatabaseProvider.<init>(DatabaseProvider.java:141)
    at org.apache.roller.weblogger.business.startup.WebloggerStartup.prepare(WebloggerStartup.java:171)
    at org.apache.roller.weblogger.ui.core.RollerContext.contextInitialized(RollerContext.java:138)
    at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4205)
    at org.apache.catalina.core.StandardContext.start(StandardContext.java:4704)
    at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:799)
    at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:779)
    at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:601)
    at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:1079)
    at org.apache.catalina.startup.HostConfig.deployDirectories(HostConfig.java:1002)
    at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:506)
    at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1315)
    at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:324)
    at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:142)
    at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1061)
    at org.apache.catalina.core.StandardHost.start(StandardHost.java:840)
    at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1053)
    at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:463)
    at org.apache.catalina.core.StandardService.start(StandardService.java:525)
    at org.apache.catalina.core.StandardServer.start(StandardServer.java:754)
    at org.apache.catalina.startup.Catalina.start(Catalina.java:595)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:289)
    at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:414)
Caused by: java.lang.NullPointerException
    at sun.jdbc.odbc.JdbcOdbcDriver.getProtocol(JdbcOdbcDriver.java:507)
    at sun.jdbc.odbc.JdbcOdbcDriver.knownURL(JdbcOdbcDriver.java:476)
    at sun.jdbc.odbc.JdbcOdbcDriver.acceptsURL(JdbcOdbcDriver.java:307)
    at java.sql.DriverManager.getDriver(DriverManager.java:253)
    at org.apache.tomcat.dbcp.dbcp.BasicDataSource.createConnectionFactory(BasicDataSource.java:1437)
    ... 30 more]

Context.xml

<Context path="/roller" docBase="c:\Program Files\Apache Software Foundation\Tomcat 6.0\webapps\roller" debug="0">
    <Resource name="jdbc/rollerdb" auth="Container"
        type="javax.sql.DataSource"
        driverClassName="com.mysql.jdbc.Driver"
        url="jdbc:mysql://localhost:3306/rollerdb?autoReconnect=true&amp;useUnicode=true&amp;characterEncoding=utf8-&amp;mysqlEncoding=utf8"
        username="roller_user"
        password="password"
        maxActive="20" maxIdle="3" removeAbandoned="true"
        maxWait="3000" 
    />
    <Resource name="mail/Session"
        auth="Container"
        type="javax.mail.Session"
        username="[email protected]"
        password="password"
        mail.debug="false"
        mail.user="[email protected]"
        mail.password="password"
        mail.smtp.from="[email protected]"
        mail.transport.protocol="smtp"
        mail.smtp.port="465"
        mail.smtp.host="smtp.gmail.com"
        mail.smtp.auth="true"
        mail.smtp.starttls.enable="true"
        mail.smtp.socketFactory.port="465"
        mail.smtp.socketFactory.class="javax.net.ssl.SSLSocketFactory"
        mail.smtp.socketFactory.fallback="false" 
    />
</Context>

web.xml

<web-app .. >
...
    <!-- jndi resources -->
    <resource-ref>
        <res-ref-name>jdbc/rollerdb</res-ref-name>
        <res-type>javax.sql.DataSource</res-type>
        <res-auth>Container</res-auth>
    </resource-ref>

    <resource-ref>
        <res-ref-name>mail/Session</res-ref-name>
        <res-type>javax.mail.Session</res-type>
        <res-auth>Container</res-auth>
    </resource-ref>

</web-app>

roller-custom.properties

installation.type=auto
database.configurationType=jndi
database.jndi.name=jdbc/rollerdb
mail.configurationType=jndi
mail.jndi.name=mail/Session

I在tomcat的lib目录中有mysql-connector-java-5.1.15-bin.jar、activation.jar和mail.jar，在tomcat的webapps文件夹中有Web应用程序roller。

我无法理解我在这里做错了什么。有人可以帮助我理解我在这里缺少什么吗？

谢谢。

谢谢。

原文

Hi
When I try to connect to the datasource using JNDI, I am getting this error:

    [org.apache.tomcat.dbcp.dbcp.SQLNestedException: Cannot create JDBC driver of class '' for connect URL 'null'
    at org.apache.tomcat.dbcp.dbcp.BasicDataSource.createConnectionFactory(BasicDataSource.java:1452)
    at org.apache.tomcat.dbcp.dbcp.BasicDataSource.createDataSource(BasicDataSource.java:1371)
    at org.apache.tomcat.dbcp.dbcp.BasicDataSource.getConnection(BasicDataSource.java:1044)
    at org.apache.roller.weblogger.business.DatabaseProvider.getConnection(DatabaseProvider.java:179)
    at org.apache.roller.weblogger.business.DatabaseProvider.<init>(DatabaseProvider.java:141)
    at org.apache.roller.weblogger.business.startup.WebloggerStartup.prepare(WebloggerStartup.java:171)
    at org.apache.roller.weblogger.ui.core.RollerContext.contextInitialized(RollerContext.java:138)
    at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4205)
    at org.apache.catalina.core.StandardContext.start(StandardContext.java:4704)
    at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:799)
    at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:779)
    at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:601)
    at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:1079)
    at org.apache.catalina.startup.HostConfig.deployDirectories(HostConfig.java:1002)
    at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:506)
    at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1315)
    at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:324)
    at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:142)
    at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1061)
    at org.apache.catalina.core.StandardHost.start(StandardHost.java:840)
    at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1053)
    at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:463)
    at org.apache.catalina.core.StandardService.start(StandardService.java:525)
    at org.apache.catalina.core.StandardServer.start(StandardServer.java:754)
    at org.apache.catalina.startup.Catalina.start(Catalina.java:595)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:289)
    at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:414)
Caused by: java.lang.NullPointerException
    at sun.jdbc.odbc.JdbcOdbcDriver.getProtocol(JdbcOdbcDriver.java:507)
    at sun.jdbc.odbc.JdbcOdbcDriver.knownURL(JdbcOdbcDriver.java:476)
    at sun.jdbc.odbc.JdbcOdbcDriver.acceptsURL(JdbcOdbcDriver.java:307)
    at java.sql.DriverManager.getDriver(DriverManager.java:253)
    at org.apache.tomcat.dbcp.dbcp.BasicDataSource.createConnectionFactory(BasicDataSource.java:1437)
    ... 30 more]

Context.xml

<Context path="/roller" docBase="c:\Program Files\Apache Software Foundation\Tomcat 6.0\webapps\roller" debug="0">
    <Resource name="jdbc/rollerdb" auth="Container"
        type="javax.sql.DataSource"
        driverClassName="com.mysql.jdbc.Driver"
        url="jdbc:mysql://localhost:3306/rollerdb?autoReconnect=true&useUnicode=true&characterEncoding=utf8-&mysqlEncoding=utf8"
        username="roller_user"
        password="password"
        maxActive="20" maxIdle="3" removeAbandoned="true"
        maxWait="3000" 
    />
    <Resource name="mail/Session"
        auth="Container"
        type="javax.mail.Session"
        username="[email protected]"
        password="password"
        mail.debug="false"
        mail.user="[email protected]"
        mail.password="password"
        mail.smtp.from="[email protected]"
        mail.transport.protocol="smtp"
        mail.smtp.port="465"
        mail.smtp.host="smtp.gmail.com"
        mail.smtp.auth="true"
        mail.smtp.starttls.enable="true"
        mail.smtp.socketFactory.port="465"
        mail.smtp.socketFactory.class="javax.net.ssl.SSLSocketFactory"
        mail.smtp.socketFactory.fallback="false" 
    />
</Context>

web.xml

<web-app .. >
...
    <!-- jndi resources -->
    <resource-ref>
        <res-ref-name>jdbc/rollerdb</res-ref-name>
        <res-type>javax.sql.DataSource</res-type>
        <res-auth>Container</res-auth>
    </resource-ref>

    <resource-ref>
        <res-ref-name>mail/Session</res-ref-name>
        <res-type>javax.mail.Session</res-type>
        <res-auth>Container</res-auth>
    </resource-ref>

</web-app>

roller-custom.properties

installation.type=auto
database.configurationType=jndi
database.jndi.name=jdbc/rollerdb
mail.configurationType=jndi
mail.jndi.name=mail/Session

I've got mysql-connector-java-5.1.15-bin.jar, activation.jar and mail.jar in tomcat's lib diectory and the web application roller in tomcat's webapps folder.

I've not been able to understand what I am doing wrong here. Could someone help me understand what am I missing here?

Thanks.

Thanks.

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评论（4）

浅笑轻吟梦一曲 2024-10-27 02:19:16

我刚刚遇到了类似的错误，结果发现我的 context.xml 文件略有损坏。我认为这很可能就是问题所在。

我建议在我和你之间比较 context.xml 文件，我说尝试这个

driverClass

代替

driverClassName

I just got through a similar error and it turns out my context.xml file was slightly mangled. I think this most likely is where the problem resides.

My suggestion in comparing context.xml files between myself and you, I say try this

driverClass

In place of

driverClassName
回复 原文
ゃ人海孤独症 2024-10-27 02:19:16

我已经解决了这个问题，将导入引用（在我的情况下）从：

import org.apache.tomcat.dbcp.dbcp.BasicDataSource;

更改为：

import org.apache.commons.dbcp.BasicDataSource;

生成了我的错误，因为我总是使用 CRTL+o 进行导入引用，并且当我进行导入时，我的引用中没有 .jar 。
我希望这对其他人有用。

I've solved this problem changing the import reference (in my case) from:

import org.apache.tomcat.dbcp.dbcp.BasicDataSource;

to

import org.apache.commons.dbcp.BasicDataSource;

My error was generated because I always use CRTL+o for import references, and when I made the import I had not the .jar in my references.
I hope this may be useful for others.

回复 原文
缱倦旧时光 2024-10-27 02:19:16

如果您的 Tomcat 版本不同，您也可能会遇到此错误..那么您的 context.xml 必须看起来不同...有关详细信息，请转到此页面..必须阅读此问题：

http://www.crazysquirrel.com/computing/java/connection-pooling.jspx

regs
卡西克语

You could also encounter this error if your Tomcat version is different ..then ur context.xml would have to look different ...for detail go to this page ..a must read for this problem :

http://www.crazysquirrel.com/computing/java/connection-pooling.jspx

regs
Karthic

回复 原文
不回头走下去 2024-10-27 02:19:16

在我的例子中，帮助进行了以下更改：在 APPLICATION_PATH/WebContent/META_INF/context.xml 中

，旧代码：

<resource name="jdbc/internships_db" auth="Container" type="javax.sql.DataSource">
    <param name="username" value="my_user" />
    <param name="password" value="my_password" />
    <param name="url" value="jdbc:mysql://localhost:3306/internships_db" />
</resource>

新代码：

<Resource name="jdbc/internships_db"
    auth="Container"
    type="javax.sql.DataSource"
    maxActive="100"
    maxIdle="30"
    username="my_user"
    maxWait="10000"
    driverClassName="com.mysql.jdbc.Driver"
    password="my_password"  
    url="jdbc:mysql://localhost:3306/internships_db"/>

Jdbc-Driver 类放置在路径下
/user_path/tomcat-instance_path/webapps/app_name/WEB-INF/lib/com.mysql.jdbc_5.1.5.jar

In my case helped following changes: in APPLICATION_PATH/WebContent/META_INF/context.xml

old code:

<resource name="jdbc/internships_db" auth="Container" type="javax.sql.DataSource">
    <param name="username" value="my_user" />
    <param name="password" value="my_password" />
    <param name="url" value="jdbc:mysql://localhost:3306/internships_db" />
</resource>

new code:

<Resource name="jdbc/internships_db"
    auth="Container"
    type="javax.sql.DataSource"
    maxActive="100"
    maxIdle="30"
    username="my_user"
    maxWait="10000"
    driverClassName="com.mysql.jdbc.Driver"
    password="my_password"  
    url="jdbc:mysql://localhost:3306/internships_db"/>

Jdbc-Driver class is placed under the path
/user_path/tomcat-instance_path/webapps/app_name/WEB-INF/lib/com.mysql.jdbc_5.1.5.jar

回复 原文
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