FileReader fr = new FileReader(new File("D:\\folder\\mySQLFile1.txt"));
BufferedReader br = new BufferedReader(fr);

while((s = br.readLine()) != null) {
    sb.append(s);
}
br.close();

String sbq=sb.toString();
String S1 = sbq.replaceAll("(?:/\\*(?:[^*]|(?:\\*+[^*/]))*\\*+/)|(?://.*)","");
String[] inst = S1.split(";|/");

for (int i = 0; i<inst.length; i++) {           
    if (!inst[i].trim().equals("")) { 
        ResultSet resultSet = stmt.executeQuery(inst[i]);
        ResultSetMetaData rsmd = resultSet.getMetaData();
        int columnsNumber = rsmd.getColumnCount();
        // while (resultSet.next()) {
            for (int x = 1; x <= columnsNumber; x++) {
                String columnValue = resultSet.getString(x);
                System.out.print(columnValue + " " );
            }
            System.out.println("");
        // }
    }
    System.out.println();
}

如果没有while循环，select将不起作用，而while则不接受下一个查询。