JDBC tomcat连接池不起作用
[英]JDBC tomcat connection pool is not working
问题描述
Apache tomcat log 
Apache tomcat日志
Jul 19, 2014 9:31:31 PM org.apache.catalina.core.StandardWrapperValve invoke SEVERE: Servlet.service() for servlet [FrontController] in context with path [/GroupFound] threw exception java.lang.ClassCastException: org.apache.tomcat.dbcp.dbcp.BasicDataSource cannot be cast to org.apache.tomcat.jdbc.pool.DataSource at models.bean.Customer.act(Customer.java:32) at controller.FrontController.processRequest(FrontController.java:40) at controller.FrontController.doGet(FrontController.java:61) at javax.servlet.http.HttpServlet.service(HttpServlet.java:621) at javax.servlet.http.HttpServlet.service(HttpServlet.java:722) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210) at org.netbeans.modules.web.monitor.server.MonitorFilter.doFilter(MonitorFilter.java:393) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:
Error 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 models.bean.Customer.act(Customer.java:33) at controller.FrontController.processRequest(FrontController.java:40) at controller.FrontController.doGet(FrontController.java:61) at javax.servlet.http.HttpServlet.service(HttpServlet.java:621) at javax.servlet.http.HttpServlet.service(HttpServlet.java:722) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210) at org.netbeans.modules.web.monitor.server.MonitorFilter.doFilter(MonitorFilter.java:393) at org.apache.catalina.co
context.xml changed from META-INF folder. 从META-INF文件夹更改了context.xml 。 catalina-home/conf/Catalina/localhost/[projectname].xml also have been changed while changing META-INF copy. 在更改META-INF副本时，catalina-home / conf / Catalina / localhost / [项目名称] .xml也已更改。
<?xml version="1.0" encoding="UTF-8"?>
<Context antiJARLocking="true" path="/GroupFound">
<Resource auth="Container"
defaultReadOnly="false"
driverClassName="com.mysql.jdbc.jdbc2.optional"
factory="org.apache.tomcat.jdbc.pool.DataSourceFactory"
initialSize="0"
jdbcInterceptors="org.apache.tomcat.jdbc.pool.interceptor.ConnectionState;org.apache.tomcat.jdbc.pool.interceptor.StatementFinalizer"
jmxEnabled="true"
logAbandoned="true"
maxActive="300" maxIdle="50"
maxWait="10000"
minEvictableIdleTimeMillis="300000"
minIdle="30"
name="jdbc/testcp"
password=""
removeAbandoned="true"
removeAbandonedTimeout="60"
testOnBorrow="true"
testOnReturn="false"
testWhileIdle="true"
timeBetweenEvictionRunsMillis="30000"
type="javax.sql.DataSource"
url="jdbc:mysql://localhost:3306/test"
username="root"
validationInterval="30000"
validationQuery="SELECT 1"/>
</Context>
Web.xml changed from application context (netbeans IDE) Web.xml从应用程序上下文更改（netbeans IDE）
<?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" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd">
<servlet>
<servlet-name>FrontController</servlet-name>
<servlet-class>controller.FrontController</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>FrontController</servlet-name>
<url-pattern>/index</url-pattern>
</servlet-mapping>
<session-config>
<session-timeout>
30
</session-timeout>
</session-config>
<resource-ref>
<description>DB Connection</description>
<res-ref-name>/jdbc/testcp</res-ref-name>
<res-type>javax.sql.DataSource</res-type>
<res-auth>Container</res-auth>
</resource-ref>
</web-app>
Have been trying to fix it from hours. 一直试图从几个小时内修复它。 Searched google and similar issues with no success. 搜索google和类似问题均未成功。 I am exhausted. 我累死。 How to fix it? 如何解决？ I just want to see DataSource working. 我只想看到DataSource工作。
Details JDK 6.1 netbeans 7.2 tomcat 7.0.27 详细信息 JDK 6.1 netbeans 7.2 tomcat 7.0.27
1 个解决方案
解决方案1
0 2014-07-19 19:39:21
This appears to be the best guide that I can find: 这似乎是我可以找到的最佳指南：
http://tomcat.apache.org/tomcat-7.0-doc/jndi-datasource-examples-howto.html http://tomcat.apache.org/tomcat-7.0-doc/jndi-datasource-examples-howto.html
A quick test would be to put it here: 一个快速的测试是将其放在这里：
$CATALINA_BASE/conf/context.xml $ CATALINA_BASE / conf / context.xml
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