Spring利用GeneratedKeyHolder,提供了一个可以返回新增记录对应主键值的方法:
int update(PreparedStatementCreator psc, KeyHolder generatedKeyHolder)
Spring为KeyHolder接口指代了一个通用的实现类GeneratedKeyHolder,该类返回新增记录时的自增长主键值。假设我们希望在新增论坛板块对象后,希望将主键值加载到对象中,则可以按以下代码进行调整:
final String INSERT_SQL = "insert into gtable(username,callback) values(?,?)"; KeyHolder keyHolder = new GeneratedKeyHolder(); jdbcTemplate.update(new PreparedStatementCreator() { public PreparedStatement createPreparedStatement( Connection connection) throws SQLException { PreparedStatement ps = connection.prepareStatement(INSERT_SQL, new String[] { "id" }); ps.setString(1, request.getUsername()); ps.setString(2, request.getCallback()); return ps; } }, keyHolder); logger.debug("id:" + keyHolder.getKey()+"long:"+keyHolder.getKey().longValue());