public static String buildInsertSql(String table,String[] fields){    StringBuilder sb = new StringBuilder(1024);    sb.append("INSERT INTO ").append(table).append(" (");    String s = String.join(", ",fields);    String[] a1 = new String[fields.length];    for (int i=0;i< fields.length;i++){        a1[i] = "?";    }    String s2 = String.join(", ",a1);    sb.append(s).append(") VALUES (").append(s2).append(")");    return sb.toString();}