取得資料表的欄位名稱

It's userful method.

public void getColumnNames(ResultSet rs) throws SQLException {
ResultSetMetaData rsMetaData = rs.getMetaData();
int nCol = rsMetaData.getColumnCount();

// get the column names
for (int i = 0; i < nCol; i++) {
String colName = rsMetaData.getColumnName(i);
// Get table
String tableName = rsMetaData.getTableName(i);
}
}