Java SqlRowSet返回null,但为什么?
这就是我试图从数据库获取数据的地方,但是我的sqlRowSet一直返回null 我定义了它Java SqlRowSet返回null,但为什么?,java,spring,Java,Spring,这就是我试图从数据库获取数据的地方,但是我的sqlRowSet一直返回null 我定义了它 private SqlRowSet sqlRowSet; @Override public Timeseddel read() { String sql = "SELECT * FROM timeseddel"; sqlRowSet = jdbc.queryForRowSet(sql); while (sqlRowSet.next()) { return
private SqlRowSet sqlRowSet;
@Override
public Timeseddel read() {
String sql = "SELECT * FROM timeseddel";
sqlRowSet = jdbc.queryForRowSet(sql);
while (sqlRowSet.next()) {
return new Timeseddel(sqlRowSet.getInt("timeseddel_id"), sqlRowSet.getDouble("appendix"), sqlRowSet.getDouble("c_time_fredag"),
sqlRowSet.getDouble("c_time_lordag"), sqlRowSet.getDouble("c_time_mandah"), sqlRowSet.getDouble("c_time_onsdag"),
sqlRowSet.getDouble("c_time_sondag"), sqlRowSet.getDouble("c_time_tirsdag"), sqlRowSet.getDouble("c_time_torsdag"),
sqlRowSet.getInt("fk_user_id"), sqlRowSet.getDouble("i_alt_timer"), sqlRowSet.getString("kunde"),
sqlRowSet.getDouble("o_time_fredag"), sqlRowSet.getDouble("o_time_lordag"), sqlRowSet.getDouble("o_time_mandag"),
sqlRowSet.getDouble("o_time_onsdag"), sqlRowSet.getDouble("o_time_sondag"), sqlRowSet.getDouble("o_time_tirsdag"),
sqlRowSet.getDouble("o_time_torsdag"), sqlRowSet.getDouble("p_time_fredag"), sqlRowSet.getDouble("p_time_lordag"),
sqlRowSet.getDouble("p_time_mandag"), sqlRowSet.getDouble("p_time_onsdag"), sqlRowSet.getDouble("p_time_sondag"),
sqlRowSet.getDouble("p_time_tirsdag"), sqlRowSet.getDouble("p_time_torsdag"), sqlRowSet.getInt("uge_nr"));
}
return null;
}
ArrayList ret=new ArrayList()代码>
while (sqlRowSet.next()) {
ret.add( new Timeseddel(sqlRowSet.getInt("timeseddel_id"), sqlRowSet.getDouble("appendix"), sqlRowSet.getDouble("c_time_fredag"),
sqlRowSet.getDouble("c_time_lordag"), sqlRowSet.getDouble("c_time_mandah"), sqlRowSet.getDouble("c_time_onsdag"),
sqlRowSet.getDouble("c_time_sondag"), sqlRowSet.getDouble("c_time_tirsdag"), sqlRowSet.getDouble("c_time_torsdag"),
sqlRowSet.getInt("fk_user_id"), sqlRowSet.getDouble("i_alt_timer"), sqlRowSet.getString("kunde"),
sqlRowSet.getDouble("o_time_fredag"), sqlRowSet.getDouble("o_time_lordag"), sqlRowSet.getDouble("o_time_mandag"),
sqlRowSet.getDouble("o_time_onsdag"), sqlRowSet.getDouble("o_time_sondag"), sqlRowSet.getDouble("o_time_tirsdag"),
sqlRowSet.getDouble("o_time_torsdag"), sqlRowSet.getDouble("p_time_fredag"), sqlRowSet.getDouble("p_time_lordag"),
sqlRowSet.getDouble("p_time_mandag"), sqlRowSet.getDouble("p_time_onsdag"), sqlRowSet.getDouble("p_time_sondag"),
sqlRowSet.getDouble("p_time_tirsdag"), sqlRowSet.getDouble("p_time_torsdag"), sqlRowSet.getInt("uge_nr"));
}
return ret;