JAVA TOMCAT 连MYSQL 出现了问题（急）

Question

这个程序完成的是在页面输入用户名和密码，提交，我想连到数据库看有没有此用户名用密码，可现在连不上。请高手指点
错误：java.lang.ClassCastException: org.apache.tomcat.dbcp.dbcp.BasicDataSource
at org.webb.login.LoginServlet.doGet(LoginServlet.java:36)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:617)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
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:233)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:286)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:845)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
at java.lang.Thread.run(Thread.java:595)我的配置：apache-tomcat-6.0.18\conf\contxet.xml
<Resource name="jdbc/mysql" auth="Container" type="javax.sql.DataSource"           maxActive="100" maxIdle="30" maxWait="10000"               username="root" password="123456" driverClassName="com.mysql.jdbc.Driver"  url="jdbc:mysql://127.0.0.1:3306 liuupeng?characterEncoding=utf8"/>
</Context>我的源代码：
import java.io.IOException;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.Statement;import javax.naming.Context;
import javax.naming.InitialContext;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;import sun.jdbc.odbc.ee.DataSource;public class LoginServlet extends HttpServlet { public LoginServlet() {
super();
} public void destroy() {
super.destroy(); 
} public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException { Context initContext; try {
initContext = new InitialContext();

Context envContext = (Context) initContext.lookup("java:/comp/env");
DataSource ds = (DataSource) envContext.lookup("jdbc/mysql");
 if(ds==null){
 System.out.println("获得数据源成功");
 }
Connection conn = ds.getConnection();
Statement stmt = conn.createStatement();
ResultSet set = stmt.executeQuery("SELECT * FROM lp1");
while (set.next()) {
System.out.println(set.getString("appid"));
} } catch (Exception e) {
e.printStackTrace();
} String name = request.getParameter("yourname");
System.out.println("yourname=" + name);

}
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException { doGet(request, response);
}
public void init() throws ServletException {
}
}

Answer 1

web.xml 文件你是怎么配置的?

Answer 2

apache-tomcat-6.0.18\conf\web.xml配置
<resource-ref>   
    <description>DB Connection</description>   
    <res-ref-name>jdbc/sotpas</res-ref-name>   
    <res-type>javax.sql.DataSource</res-type>   
    <res-auth>Container</res-auth>   
  </resource-ref>   

Answer 3

是这个，还是WEB-INF下的？

Answer 4

apache-tomcat-6.0.18\conf\web.xml配置 
<resource-ref>  
    <description>DB Connection </description>  
    <res-ref-name>jdbc/mysql</res-ref-name>  
    <res-type>javax.sql.DataSource </res-type>  
    <res-auth>Container </res-auth>  
  </resource-ref>  该过来试一试.

Answer 5

我的配置：apache-tomcat-6.0.18\conf\contxet.xml 
<Resource name="jdbc/mysql" 
auth="Container" 
type="javax.sql.DataSource"
maxActive="100" maxIdle="30" maxWait="10000"              
username="root" password="123456" 
driverClassName="com.mysql.jdbc.Driver" 
url="jdbc:mysql://127.0.0.1:3306 liuupeng?characterEncoding=utf8"/> 
</Context> web.xml的配置:apache-tomcat-6.0.18\conf\web.xml配置 
<resource-ref>  
    <description>DB Connection </description>  
    <res-ref-name>jdbc/mysql </res-ref-name>  
    <res-type>javax.sql.DataSource </res-type>  
    <res-auth>Container </res-auth>  
  </resource-ref>  注意: 红色部分要写相同的连接名称.