在运维旧项目时候，碰上sql查询结果只能返回List<Map>，key为表单字段名，value为获取到的结果数据。
懒得一个一个敲出来，就直接写个方法转换，并赋值到相应实体对象里去。

• Map中KEY去除下划线并首字母转换为大写（通用）

private Map<String,Object> mapKeyToUpper(Map<String,Object> map){Map<String, Object> newMap = new HashMap<>();for (String key : map.keySet()) {StringBuilder newKey = new StringBuilder();boolean nextToUpper = false;for (int i = 0; i < key.length(); i++) {char c = key.charAt(i);newKey.append(nextToUpper?Character.toUpperCase(c):Character.toLowerCase(c));nextToUpper = ('_' == c)?true:false;}newMap.put(newKey.toString().replace("_",""), map.get(key));}return newMap;
}

• 实际使用示例

public List<Test> getInfos(){String sql = "select r.* from t_test r left join t_test_log  sl on r.id = sl.bs_id";List<Map> results = testDao.findBySql(sql);List<Test> tests= new ArrayList<>();try {for (Map map : results) {Test rf = new Test();Map newMap = mapKeyToUpper(map);BeanUtils.populate(rf, newMap);tests.add(rf);}} catch (Exception e) {throw new RuntimeException(e);}return tests;
}