package com.itsv.gankao.common;import java.sql.*;public abstract class Query {  protected ResultSet result_ = null;  protected Statement statement_ = null;  public Query() {  }  public boolean next()      throws java.sql.SQLException {      if (result_ == null){          return false;      } else{          return result_.next();      }  }  public void close()      throws java.sql.SQLException {      if (result_ != null){          result_.close();          result_ = null;      }      if (statement_ != null){          statement_.close();          statement_ = null;      }  }}