我正在开发 SpringMvcJndiDataSourceXML 示例。在此示例中，我面临以下错误。我找到了很多链接，但没有一个对我有用。虽然这是重复的问题，但我仍然想得到以下问题的答案。请指导。
org.springframework.jdbc.CannotGetJdbcConnectionException: Could not get JDBC Connection; nested exception is java.sql.SQLException: Cannot create JDBC driver of class '' for connect URL 'null'
at org.springframework.jdbc.datasource.DataSourceUtils.getConnection(DataSourceUtils.java:80)
at org.springframework.jdbc.core.JdbcTemplate.execute(JdbcTemplate.java:394)
at org.springframework.jdbc.core.JdbcTemplate.query(JdbcTemplate.java:474)
at org.springframework.jdbc.core.JdbcTemplate.query(JdbcTemplate.java:484)
at net.codejava.spring.dao.UserDAOImpl.list(UserDAOImpl.java:24)
at net.codejava.spring.controller.HomeController.home(HomeController.java:21)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:221)
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:136)
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:114)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:827)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:738)
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:963)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:897)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970)
at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:861)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:622)
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:292)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:212)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:141)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:616)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:528)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1099)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:670)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1520)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1476)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.sql.SQLException: Cannot create JDBC driver of class '' for connect URL 'null'
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 org.springframework.jdbc.datasource.DataSourceUtils.doGetConnection(DataSourceUtils.java:111)
at org.springframework.jdbc.datasource.DataSourceUtils.getConnection(DataSourceUtils.java:77)
... 43 common frames omitted
Caused by: java.sql.SQLException: No suitable driver
at java.sql.DriverManager.getDriver(DriverManager.java:315)
at org.apache.tomcat.dbcp.dbcp2.BasicDataSource.createConnectionFactory(BasicDataSource.java:2144)
... 47 common frames omitted
我使用tomcat进行部署。spring-context.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd">
<mvc:annotation-driven />
<context:component-scan base-package="net.codejava.spring" />
<mvc:resources mapping="/resources/**" location="/resources/" />
<bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/views/" />
<property name="suffix" value=".jsp" />
</bean>
<bean id="dataSource" class="org.springframework.jndi.JndiObjectFactoryBean">
<property name="jndiName" value="java:comp/env/jdbc/UsersDB"/>
</bean>
<bean id="userDao" class="net.codejava.spring.dao.UserDAOImpl">
<constructor-arg>
<ref bean="dataSource" />
</constructor-arg>
</bean>
</beans>
web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="3.0" xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd">
<display-name>SpringMvcJndiDataSourceXML</display-name>
<servlet>
<servlet-name>SpringDispatcher</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/spring-context.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>SpringDispatcher</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
<!-- database JNDI reference -->
<description></description>
<resource-ref>
<description>DBConnection</description>
<res-ref-name>jdbc/test</res-ref-name>
<res-type>javax.sql.DataSource</res-type>
<res-auth>Container</res-auth>
</resource-ref>
<session-config>
<session-timeout>30</session-timeout>
</session-config>
</web-app>
tomcat 服务器.xml
<?xml version="1.0" encoding="UTF-8"?>
<!-- Licensed to the Apache Software Foundation (ASF) under one or more contributor
license agreements. See the NOTICE file distributed with this work for additional
information regarding copyright ownership. The ASF licenses this file to
You under the Apache License, Version 2.0 (the "License"); you may not use
this file except in compliance with the License. You may obtain a copy of
the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required
by applicable law or agreed to in writing, software distributed under the
License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS
OF ANY KIND, either express or implied. See the License for the specific
language governing permissions and limitations under the License. --><!-- Note: A "Server" is not itself a "Container", so you may not define
subcomponents such as "Valves" at this level. Documentation at /docs/config/server.html -->
<Server port="8005" shutdown="SHUTDOWN">
<Listener className="org.apache.catalina.startup.VersionLoggerListener" />
<!-- Security listener. Documentation at /docs/config/listeners.html <Listener
className="org.apache.catalina.security.SecurityListener" /> -->
<!--APR library loader. Documentation at /docs/apr.html -->
<Listener SSLEngine="on"
className="org.apache.catalina.core.AprLifecycleListener" />
<!-- Prevent memory leaks due to use of particular java/javax APIs -->
<Listener className="org.apache.catalina.core.JreMemoryLeakPreventionListener" />
<Listener className="org.apache.catalina.mbeans.GlobalResourcesLifecycleListener" />
<Listener className="org.apache.catalina.core.ThreadLocalLeakPreventionListener" />
<Resource auth="Container"
driverClassName="com.mysql.jdbc.Driver"
maxActive="20" maxIdle="10"
maxWait="-1"
name="jdbc/UsersDB"
type="javax.sql.DataSource"
username="root" password="root"
url="jdbc:mysql://localhost:3306/test" />
<!-- Global JNDI resources Documentation at /docs/jndi-resources-howto.html -->
<GlobalNamingResources>
<!-- Editable user database that can also be used by UserDatabaseRealm
to authenticate users -->
<Resource auth="Container" description="User database that can be updated and saved"
factory="org.apache.catalina.users.MemoryUserDatabaseFactory" name="UserDatabase"
pathname="conf/tomcat-users.xml" type="org.apache.catalina.UserDatabase" />
</GlobalNamingResources>
<!-- A "Service" is a collection of one or more "Connectors" that share
a single "Container" Note: A "Service" is not itself a "Container", so you
may not define subcomponents such as "Valves" at this level. Documentation
at /docs/config/service.html -->
<Service name="Catalina">
<!--The connectors can use a shared executor, you can define one or more
named thread pools -->
<!-- <Executor name="tomcatThreadPool" namePrefix="catalina-exec-" maxThreads="150"
minSpareThreads="4"/> -->
<!-- A "Connector" represents an endpoint by which requests are received
and responses are returned. Documentation at : Java HTTP Connector: /docs/config/http.html
(blocking & non-blocking) Java AJP Connector: /docs/config/ajp.html APR (HTTP/AJP)
Connector: /docs/apr.html Define a non-SSL/TLS HTTP/1.1 Connector on port
8080 -->
<Connector connectionTimeout="20000" port="8080" protocol="HTTP/1.1"
redirectPort="8443" />
<!-- A "Connector" using the shared thread pool -->
<!-- <Connector executor="tomcatThreadPool" port="8080" protocol="HTTP/1.1"
connectionTimeout="20000" redirectPort="8443" /> -->
<!-- Define a SSL/TLS HTTP/1.1 Connector on port 8443 This connector uses
the NIO implementation that requires the JSSE style configuration. When using
the APR/native implementation, the OpenSSL style configuration is required
as described in the APR/native documentation -->
<!-- <Connector port="8443" protocol="org.apache.coyote.http11.Http11NioProtocol"
maxThreads="150" SSLEnabled="true" scheme="https" secure="true" clientAuth="false"
sslProtocol="TLS" /> -->
<!-- Define an AJP 1.3 Connector on port 8009 -->
<Connector port="8009" protocol="AJP/1.3" redirectPort="8443" />
<!-- An Engine represents the entry point (within Catalina) that processes
every request. The Engine implementation for Tomcat stand alone analyzes
the HTTP headers included with the request, and passes them on to the appropriate
Host (virtual host). Documentation at /docs/config/engine.html -->
<!-- You should set jvmRoute to support load-balancing via AJP ie : <Engine
name="Catalina" defaultHost="localhost" jvmRoute="jvm1"> -->
<Engine defaultHost="localhost" name="Catalina">
<!--For clustering, please take a look at documentation at: /docs/cluster-howto.html
(simple how to) /docs/config/cluster.html (reference documentation) -->
<!-- <Cluster className="org.apache.catalina.ha.tcp.SimpleTcpCluster"/> -->
<!-- Use the LockOutRealm to prevent attempts to guess user passwords
via a brute-force attack -->
<Realm className="org.apache.catalina.realm.LockOutRealm">
<!-- This Realm uses the UserDatabase configured in the global JNDI resources
under the key "UserDatabase". Any edits that are performed against this UserDatabase
are immediately available for use by the Realm. -->
<Realm className="org.apache.catalina.realm.UserDatabaseRealm"
resourceName="UserDatabase" />
</Realm>
<Host appBase="webapps" autoDeploy="true" name="localhost"
unpackWARs="true">
<!-- SingleSignOn valve, share authentication between web applications
Documentation at: /docs/config/valve.html -->
<!-- <Valve className="org.apache.catalina.authenticator.SingleSignOn"
/> -->
<!-- Access log processes all example. Documentation at: /docs/config/valve.html
Note: The pattern used is equivalent to using pattern="common" -->
<Valve className="org.apache.catalina.valves.AccessLogValve"
directory="logs" pattern="%h %l %u %t "%r" %s %b" prefix="localhost_access_log"
suffix=".txt" />
<Context docBase="SpringMvcJndiDataSourceXML" path="/SpringMvcJndiDataSourceXML"
reloadable="true" source="org.eclipse.jst.jee.server:SpringMvcJndiDataSourceXML" />
</Host>
</Engine>
</Service>
</Server>
