Spring JdbcTemplate 使用总结
1、查询Object
public Classify queryClassifById(int id){ String sql="select * from t_classify where id=?"; Object[] args = new Object[] { id }; Classify classify = jdbcTemplate.queryForObject( sql, args, ParameterizedBeanPropertyRowMapper.newInstance(Classify.class)); return classify; }
2、查询List
public List<Classify> getAllMenu(){ String sql="select * from t_classify"; List<Classify> list = jdbcTemplate.query( sql, ParameterizedBeanPropertyRowMapper.newInstance(Classify.class)); return list; }
3、查询记录数
public int getCount(){ String sql="select count(*) from t_classify"; return jdbcTemplate.queryForInt(sql); }
4、获得自增长主键
public int insert(final News news) { final String sql = "insert into t_news(title, content)" + " values(?,?)"; KeyHolder keyHolder=new GeneratedKeyHolder(); jdbcTemplate.update(new PreparedStatementCreator() { @Override public PreparedStatement createPreparedStatement(Connection conn) throws SQLException { PreparedStatement ps=conn.prepareStatement(sql); ps.setString(1, news.getTitle()); ps.setString(2, news.getContent());return ps; } },keyHolder); return keyHolder.getKey().intValue(); }
作者:何海洋
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