/**
* 創建一個或多個新用戶 insert 字段和表名不確定時動態添加
*/
@Test
public void createAccount() {
  String lineColumn = "";
  Map<String, Object> paramsMap = new HashMap<String, Object>();
  Map<String, Object> dataMap = new HashMap<String, Object>();
  // map的key值為字段，value為需要insert 用戶的值。一個map即是一個新用戶
  List<Map<String, Object>> lineList = new ArrayList<Map<String, Object>>();
  dataMap.put("name", "魚多");
  dataMap.put("password", "123456");
  dataMap.put("gender", "女");
  dataMap.put("id_no", "14");
  lineList.add(dataMap);
  // 為了使字段和values()里面的值對應起來，遍歷出map的key,構建出動態字段。
  // 相應的，在accountMapper.xml中用遍歷出lineList，然后遍歷map的value,構建出insert 的值
  for (String key : dataMap.keySet()) {
    lineColumn += key + ",";
  }
  // id不會自動遞增，加上id字段
  // 相應的，在accountMapper.xml中 用序列的nextval生成id
  lineColumn += "id";
  paramsMap.put("lineColumn", lineColumn);
  paramsMap.put("table", "account");
  paramsMap.put("lineList", lineList);
  if (accountMapper.createAccount(paramsMap) > 0) {
    System.out.println("創建成功");
  }
}

<insert id="createAccount" parameterType="java.util.Map">
  INSERT INTO ${table}(${lineColumn}) select result.*,seq.nextval id from(
      <foreach collection="lineList" item="item" index="index" separator="union all">
      (select
        <foreach collection="item" index="key" item="_value" separator=","> #{_value}
        </foreach>
      from dual)
     </foreach>
  ) result
</insert>