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| /** | |
| * <h2> Converts ResultSet to HashMap of List<String,Object></h2> | |
| * @param row | |
| * @param rs_SubItemType | |
| * @throws SQLException | |
| */ | |
| private static void getHashMap( List<Map<String, Object>> row, ResultSet rs_SubItemType) throws SQLException { | |
| ResultSetMetaData metaData = rs_SubItemType.getMetaData(); | |
| int colCount = metaData.getColumnCount(); | |
| while (rs_SubItemType.next()) { | |
| Map<String, Object> columns = new HashMap<String, Object>(); | |
| for (int i = 1; i <= colCount; i++) { | |
| columns.put(metaData.getColumnLabel(i), rs_SubItemType.getObject(i)); | |
| } | |
| row.add(columns); | |
| } | |
| } |
saleemdev
commented
May 20, 2018
For dynamic query results you can try something like:
public <T> List<T> findWithDynamicQuery(String query){ Connection conn = null; PreparedStatement statement = null; List<Object> mResults = new ArrayList<>(); try { conn = UtilConnection.getDBConnection().getConnection(); } catch (SQLException e) { e.printStackTrace(out); return (List<T>) mResults; } try { statement = conn.prepareStatement(query); ResultSet result = statement.executeQuery(); ResultSetMetaData metaData = result.getMetaData(); int column = metaData.getColumnCount(); while (result.next()) { HashMap<Object, Object> rows = new HashMap<>(); for(int i = 1; i <= column; i++){ rows.put(metaData.getColumnLabel(i), result.getObject(i)); } mResults.add(rows); } result.close(); return (List<T>) mResults; } catch (SQLException e) { e.printStackTrace(out); }finally{ if(statement != null){ try { statement.close(); } catch (SQLException e) { } } if(conn != null){ try { conn.close(); } catch (SQLException e) { } } } return (List<T>) mResults; }
**Connection utility (Amend it to match your needs:**
`public static javax.sql.DataSource getDBConnection(){
DriverManagerDataSource dataSource = new DriverManagerDataSource();
dataSource.setDriverClassName("org.mariadb.jdbc.Driver");
dataSource.setUrl("jdbc:mariadb://.........");
dataSource.setUsername("db_user");
dataSource.setPassword("db_password");
return dataSource;
}`