数据源配置并测试通过后，代码如下：packagech3;importjava.sql.*;importjavax.sql.*;importjavax.naming.*;importjava.io.*;importjava.util.*;publicclassJDBCPoolDemo{publicstati...

数据源配置并测试通过后，代码如下：

package ch3;

import java.sql.*;

import javax.sql.*;

import javax.naming.*;

import java.io.*;

import java.util.*;

public class JDBCPoolDemo {

public static void main(String[] args) {

// TODO Auto-generated method stub

String tablename="student";

String sqlstr;

Connection con=null;

Statement stmt=null;

ResultSet rs=null;

Context ctx=null;

Hashtable ht=new Hashtable();

try{

ht.put(Context.INITIAL_CONTEXT_FACTORY, "weblogic.jndi.WLInitialContextFactory");

ht.put(Context.PROVIDER_URL, "t3://localhost:7001");

ctx=new InitialContext(ht);

DataSource ds=(DataSource)ctx.lookup("MysqlDataSource");

con=ds.getConnection();

sqlstr="select * from "+tablename;

rs=stmt.executeQuery(sqlstr);

while(rs.next()){

System.out.print(rs.getString("id"));

System.out.print("\t");

System.out.print(rs.getString("name"));

System.out.print("\t");

System.out.print(rs.getString("age"));

System.out.print("\t");

System.out.print("\n");

}

}catch(NamingException e1){

System.out.println(e1.toString());

System.out.println("驱动程序没找到！");

}catch(SQLException e2){

System.out.println(e2.toString());

System.out.println("数据库异常！");

}

finally{

try{

if(rs!=null)

rs.close();

if(stmt!=null)

rs.close();

if(con!=null)

rs.close();

}catch(Exception e){

System.out.println(e.toString());

}

}

}

}

当程序运行到con=ds.getConnection()是就会报错：

Exception in thread "main" java.lang.ClassCastException: weblogic.jdbc.common.internal.ConnectionEnv cannot be cast to java.io.Serializable

请问各位高手这是什么原因啊？

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试了一下 加上一个catch(Exception e3){}; 也不好使，会不会是少了些东西，如某某jar包之类的

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