import com.mysql.jdbc.LoadBalancedConnectionProxy; //导入依赖的package包/类
@Override
public com.mysql.jdbc.ConnectionImpl pickConnection(LoadBalancedConnectionProxy proxy, List<String> configuredHosts,
        Map<String, ConnectionImpl> liveConnections, long[] responseTimes, int numRetries) throws SQLException {
    if (forcedFutureServer == null || forceFutureServerTimes == 0 || !configuredHosts.contains(forcedFutureServer)) {
        return super.pickConnection(proxy, configuredHosts, liveConnections, responseTimes, numRetries);
    }
    if (forceFutureServerTimes > 0) {
        forceFutureServerTimes--;
    }
    ConnectionImpl conn = liveConnections.get(forcedFutureServer);

    if (conn == null) {
        conn = proxy.createConnectionForHost(forcedFutureServer);

    }
    return conn;
}
 

import com.mysql.jdbc.LoadBalancedConnectionProxy; //导入依赖的package包/类
public JDBC4LoadBalancedMySQLConnection(LoadBalancedConnectionProxy proxy) throws SQLException {
    super(proxy);
}