Mybatis的resultMap返回map问题 Mybatis的resultMap返回map问题

resultMap返回map问题
简单封装resultMap返回对象为map

resultMap返回map问题

select bank_name,maintain_time_intervalfromfp_channel_prd_bankwhere channel_prd_id=7 andmaintain_time_interval

简单封装resultMap返回对象为map

public class DbUtils {private static String host = "47.93.******"; private static String port = "3306"; private static String username = "*****"; private static String password = "******"; private static String database = "******"; static {try {Class.forName("com.mysql.jdbc.Driver"); } catch (Exception e) {}}private static Connection getConn() {Connection conn = null; try {String url = "jdbc:mysql://" + host + ":" + port + "/" + database; conn = DriverManager.getConnection(url, username, password); } catch (Exception e) {e.printStackTrace(); }return conn; }public static List execQuery(String sql, Object[] args) throws Exception {Connection conn = getConn(); PreparedStatement ps = conn.prepareCall(sql); ResultSet rs = null; int count = StringUtils.countMatches(sql, "?"); //变量赋值。。。。。。for (int i = 0; i < count; i++) {ps.setObject(i, args[i]); }List list = new ArrayList(); rs = ps.executeQuery(); ResultSetMetaData metaData = https://www.it610.com/article/rs.getMetaData(); //注意。。metaData.getColumnName 获取字段名，rs.getObject 获取属性是从 1 开始的，而不是从0 开始while (rs.next()) {int rowSize = metaData.getColumnCount(); Map map = new HashMap<>(); for (int i = 1; i <= rowSize; i++) {String labelName = metaData.getColumnName(i); Object obj = rs.getObject(labelName); map.put(labelName, obj); }list.add(map); }close(conn, ps, rs); return list; }/*** @param conn* @param ps* @param rs* @throws Exception*/private static void close(Connection conn, PreparedStatement ps, ResultSet rs) throws Exception {rs.close(); ps.close(); conn.close(); }

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