用jdbc的prepared statement取得mysql的自增id的方法

String sql = "insert into usr (email, usr, pwd) values (?, ?, ?)";
		Connection conn = null;
		try {
			conn = dataSource.getConnection();
			PreparedStatement ps = conn.prepareStatement(sql, Statement.RETURN_GENERATED_KEYS);
			ResultSet rs = null;
			ps.setString(1, usr.getEmail());
			ps.setString(2, usr.getUsr());
			ps.setString(3, usr.getPwd());
			ps.executeUpdate();
			rs = ps.getGeneratedKeys();
			if (rs.next()) {
				usr.setId(rs.getInt(1));
			}
			ps.close();
			UserResult userResult = new UserResult();
			userResult.setSuccess(true);
			userResult.setUsr(usr);
			return userResult;
		} catch (SQLException e) {
			throw new RuntimeException(e);
		} finally {
			if (conn != null) {
				try {
					conn.close();
				} catch (SQLException e) {
					
				}
			}
		}

应该很简单吧，大家都能看懂的，只试了mysql可以，不知其他的数据库行不行

参考： 《Is ther a way to retrieve the autoincrement ID from a prepared statement》