tomcat 6.0 数据库连接池问题

  我的数据库连接池总是报错：请那位好人帮我看看。先谢谢！！！
org.apache.tomcat.dbcp.dbcp.SQLNestedException: Cannot create JDBC driver of class '' for connect URL 'null'
    at org.apache.tomcat.dbcp.dbcp.BasicDataSource.createDataSource(BasicDataSource.java:1150)
    at org.apache.tomcat.dbcp.dbcp.BasicDataSource.getConnection(BasicDataSource.java:880)
    at com.dao.BascDao.getCon(BascDao.java:27)
    at com.dao.ShapeDao.getList(ShapeDao.java:20)
    at com.servlet.PrintServlet.doGet(PrintServlet.java:37)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:690)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:230)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:104)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:261)
    at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
    at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:581)
    at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
    at java.lang.Thread.run(Thread.java:619)
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.createDataSource(BasicDataSource.java:1143)
    ... 18 more
我的tomcat C:\Program Files\Apache Software Foundation\Tomcat 6.0\lib
中有数据驱动包 mssqljdbc2.jar文件也存在

我的web.xml中配置为：

<resource-ref>
    <description>my/print</description>
    <res-ref-name>my/print</res-ref-name>
    <res-type>javax.sql.DataSource</res-type>
  </resource-ref>

我的C:\Program Files\Apache Software Foundation\Tomcat 6.0\conf中的context.xml中是这样写的

  <Resource
     name="my/print"
     auth="Container"
     type="javax.sql.DataSource"
     maxActive="100"
     maxIdle="30"
     maxWait="10000"
     username="sa"
     password="123456"
     driverClassName="com.microsoft.sqlserver.jdbc.SQLServerDriver"
     utl="jdbc:sqlserver://localhost:1433;database=print"/>

连接类中：

public Connection getCon(){
       try {
        Context context=new InitialContext();
        //Class.forName(driver);
        //con=DriverManager.getConnection("jdbc:sqlserver://localhost:1433;database=print","sa","123456");
        DataSource dat=(DataSource) context.lookup("java:comp/env/my/print");
        
        con=dat.getConnection();
        
    } catch (Exception e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }  
      
      
       return con;
   }




----------------解决方案--------------------------------------------------------
额。。。  你打开那个驱动包，看可不可以找到你写在配置文件中的驱动类。

还有



你那 url 写错了吧！！！不是 utl 哦。。

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• maxliz 积分 +1 2010-11-17 03:01