测试CP30连接池，怎么报这样的异常？ 



import java.beans.PropertyVetoException; 
import java.sql.Connection; 
import java.sql.SQLException; 
import com.mchange.v2.c3p0.ComboPooledDataSource; 

public final class ConnectionManager { 

    private static ConnectionManager instance; 
    private static ComboPooledDataSource dataSource; 

    private ConnectionManager() throws SQLException, PropertyVetoException { 
        dataSource = new ComboPooledDataSource(); 

        dataSource.setUser("root"); 
        dataSource.setPassword("root"); 
        dataSource.setJdbcUrl("jdbc:mysql://loachost:3306/test"); 
        dataSource.setDriverClass("com.mysql.jdbc.Driver"); 
        dataSource.setInitialPoolSize(5); 
        dataSource.setMinPoolSize(1); 
        dataSource.setMaxPoolSize(10); 
        dataSource.setMaxStatements(50); 
        dataSource.setMaxIdleTime(60); 
    } 

    public static final ConnectionManager getInstance() { 
        if (instance == null) { 
            try { 
                instance = new ConnectionManager(); 
            } catch (Exception e) { 
                e.printStackTrace(); 
            } 
        } 
        return instance; 
    } 

    public synchronized final Connection getConnection() { 
        Connection conn = null; 
        try { 
            conn = dataSource.getConnection(); 
        } catch (SQLException e) { 
            e.printStackTrace(); 
        } 
        return conn; 
    } 
} 


import java.sql.Connection; 
import java.sql.PreparedStatement; 
import java.sql.ResultSet; 
import java.sql.SQLException; 


public class ConnectionDemo { 

    public static void main(String[] args)  { 
        System.out.println("使用连接池................................"); 
        for (int i = 0; i < 20; i++) { 
            long beginTime = System.currentTimeMillis(); 
            Connection conn = ConnectionManager.getInstance().getConnection(); 
            try { 
                PreparedStatement pstmt = conn.prepareStatement("SELECT * FROM t_fmscpy200"); 
                ResultSet rs = pstmt.executeQuery(); 
                while (rs.next()) { 
                } 
            } catch (SQLException e) { 
                e.printStackTrace(); 
            } finally { 
                try { 
                    conn.close(); 
                } catch (SQLException e) { 
                    e.printStackTrace(); 
                } 
            } 

            long endTime = System.currentTimeMillis(); 
            System.out.println("第" + (i + 1) + "次执行花费时间为:" + (endTime - beginTime)); 
        } 

    } 
} 


2010-7-4 21:12:52 com.mchange.v2.log.MLog <clinit> 
信息: MLog clients using java 1.4+ standard logging. 
2010-7-4 21:12:53 com.mchange.v2.c3p0.C3P0Registry banner 
信息: Initializing c3p0-0.9.2-pre1 [built 27-May-2010 01:00:49 -0400; debug? true; trace: 10] 
Exception in thread "main" java.lang.NoSuchMethodError: com.mchange.v2.async.ThreadPoolAsynchronousRunner.<init>(IZLjava/util/Timer;Ljava/lang/String;)V 
at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPoolManager.createTaskRunner(C3P0PooledConnectionPoolManager.java:132) 
at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPoolManager.poolsInit(C3P0PooledConnectionPoolManager.java:143) 
at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPoolManager.<init>(C3P0PooledConnectionPoolManager.java:262) 
at com.mchange.v2.c3p0.impl.AbstractPoolBackedDataSource.getPoolManager(AbstractPoolBackedDataSource.java:508) 
at com.mchange.v2.c3p0.impl.AbstractPoolBackedDataSource.getConnection(AbstractPoolBackedDataSource.java:128) 
at ConnectionManager.getConnection(ConnectionManager.java:39) 
at ConnectionDemo.main(ConnectionDemo.java:14) 

结果报这样的异常，jar用到的是cp300.9.1.2.jar