配tomcat数据连接池的时候出现这样的错误，太邪门了！！！！

Question

1,"mysql-connector-java.....jar"文件有没有放对.
    2,你的配置有没有写对
    <parameter>
       <name>driverClassName</name>
       <value>org.gjt.mm.mysql.Driver</value>
    </parameter>

Answer 1

jdbc 我放在 tomcat\common\lib 里面阿！！怎么还是这样呢？？

Answer 2

我连ｊｄｂｃ没问题啊！！　学ｊｓｐ也有段时间了！！
现在想学ｈｉｂｅｒｎａｔｅ可是发现自己数据库连接池都不会配
我是在server.xml里面　的　 
<GlobalNamingResources>
<Resource name="jdbc/mysql" type="javax.sql.DataSource"/>
<ResourceParams name="jdbc/mysql">
      <parameter>
        <name>factory</name>
        <value>org.apache.commons.dbcp.BasicDataSourceFactory</value>
      </parameter>
      <parameter>
        <name>maxWait</name>
        <value>-1</value>
      </parameter>
      <parameter>
        <name>maxActive</name>
        <value>20</value>
      </parameter>
      <parameter>
        <name>password</name>
        <value>wujiang</value>
      </parameter>
      <parameter>
        <name>url</name>
        <value>jdbc:mysql://192.168.5.254:3306/test</value>
      </parameter>
      <parameter>
        <name>driverClassName</name>
        <value>org.gjt.mm.mysql.Driver</value>
      </parameter>
      <parameter>
        <name>maxIdle</name>
        <value>10</value>
      </parameter>
      <parameter>
        <name>username</name>
        <value>root</value>
      </parameter>
    </ResourceParams>
    <ResourceParams name="jdbc/oracle">
      <parameter>
        <name>maxWait</name>
        <value>5000</value>
      </parameter>
      <parameter>
        <name>maxActive</name>
        <value>4</value>
      </parameter>
      <parameter>
        <name>password</name>
        <value>system</value>
      </parameter>
      <parameter>
        <name>url</name>
        <value>jdbc:oracle:thin:@192.168.5.214:1521:bkwww</value>
      </parameter>
      <parameter>
        <name>driverClassName</name>
        <value>oracle.jdbc.driver.OracleDriver</value>
      </parameter>
      <parameter>
        <name>maxIdle</name>
        <value>2</value>
      </parameter>
      <parameter>
        <name>username</name>
        <value>wujiang</value>
      </parameter>
    </ResourceParams>
 </GlobalNamingResources>

Answer 3

这个错误一般是连接的url有错误导致的
你仔细检查一下

Answer 4

<GlobalNamingResources>
    <Environment name="simpleValue" type="java.lang.Integer" value="30"/>
    <Resource auth="Container" description="User database that can be updated and saved" name="UserDatabase" type="org.apache.catalina.UserDatabase"/>
    <Resource auth="Container" name="jdbc/mysql" type="javax.sql.DataSource"/>
    <Resource name="jdbc/oracle" type="javax.sql.DataSource"/>
<Resource name="jdbc/mysql" type="javax.sql.DataSource"/>
    <ResourceParams name="UserDatabase">
      <parameter>
        <name>factory</name>
        <value>org.apache.catalina.users.MemoryUserDatabaseFactory</value>
      </parameter>
      <parameter>
        <name>pathname</name>
        <value>conf/tomcat-users.xml</value>
      </parameter>
    </ResourceParams>
    <ResourceParams name="jdbc/mysql">
      <parameter>
        <name>factory</name>
        <value>org.apache.commons.dbcp.BasicDataSourceFactory</value>
      </parameter>
      <parameter>
        <name>maxWait</name>
        <value>-1</value>
      </parameter>
      <parameter>
        <name>maxActive</name>
        <value>20</value>
      </parameter>
      <parameter>
        <name>password</name>
        <value>wujiang</value>
      </parameter>
      <parameter>
        <name>url</name>
        <value>jdbc:mysql://192.168.5.254:3306/test</value>
      </parameter>
      <parameter>
        <name>driverClassName</name>
        <value>org.gjt.mm.mysql.Driver</value>
      </parameter>
      <parameter>
        <name>maxIdle</name>
        <value>10</value>
      </parameter>
      <parameter>
        <name>username</name>
        <value>root</value>
      </parameter>
    </ResourceParams>
    <ResourceParams name="jdbc/oracle">
      <parameter>
        <name>maxWait</name>
        <value>5000</value>
      </parameter>
      <parameter>
        <name>maxActive</name>
        <value>4</value>
      </parameter>
      <parameter>
        <name>password</name>
        <value>system</value>
      </parameter>
      <parameter>
        <name>url</name>
        <value>jdbc:oracle:thin:@192.168.5.214:1521:bkwww</value>
      </parameter>
      <parameter>
        <name>driverClassName</name>
        <value>oracle.jdbc.driver.OracleDriver</value>
      </parameter>
      <parameter>
        <name>maxIdle</name>
        <value>2</value>
      </parameter>
      <parameter>
        <name>username</name>
        <value>wujiang</value>
      </parameter>
    </ResourceParams>
  </GlobalNamingResources>

Answer 5

mysql oracle 驱动　我都能用阿。　我在ｊｂｕｉｌｄｅｒ下都用的好好的
我的class12.jar mysql.jar两个文件都放在　ｔｏｍｃａｔ\common\lib里面了阿！！！
为什么会　javax.servlet.ServletException: cannot get Connection pool.org.apache.commons.dbcp.SQLNestedException: Cannot create JDBC driver of class '' for connect URL 'null', cause: No suitable driver