java list.get(i) 报类型错误

Question

下面代码块的行：SysUserTableConfig tableConfig = list.get(i);
报错：com.abc.entity.SysUserTableConfig cannot be cast to com.abc.entity.SysUserTableConfig
莫名其妙，list 的类型是 List<SysUserTableConfig>,为什么 get(i) 会报类型转换错误

 public Map<String, ColumnConfigDTO> calculate(@RequestBody List<ColumnConfigDTO> record) {
        List<SysUserTableConfig> list = util.transSourceToTarget(record, SysUserTableConfig.class);
        log.debug(list != null ? list.toString() : "NULL");
        Integer userLoginId = getLoginUserId();
        if (CollectionUtils.isEmpty(list)) return null;

        for(int i=0;i<list.size();i++){
            SysUserTableConfig tableConfig = list.get(i);
            tableConfig.setSysUserId(userLoginId);
        }
}

Answer 1

跟上次问的是不是同一个？……
https://segmentfault.com/q/10...