while (rs.next()) {
for (int j = 0; j < list.size(); j++) {
System.out.println(list.get(j));
pw.write(rs.getString(list.get(j)) + " ");
// pw.write(rs.getString("userid") + " "
// + rs.getString("phoneid") + " "
// + rs.getString("duanxin"));
pw.write("\n");
} }java
for (int j = 0; j < list.size(); j++) {
System.out.println(list.get(j));
pw.write(rs.getString(list.get(j)) + " ");
// pw.write(rs.getString("userid") + " "
// + rs.getString("phoneid") + " "
// + rs.getString("duanxin"));
pw.write("\n");
} }java
System.out.println(list.get(j));//这一行打印出来的字段名在数据库中有吗?