thymeleaf selected动态回显
https://blog.csdn.net/u010739551/article/details/82784669
可用为：
<select th:value="${questionBean.review}" id="review" name="review" class="form-control" > <option th:selected="${questionBean.review}=='0'" value="0">已发布</option> <option th:selected="${questionBean.review}=='1'" value="1">审核中</option> <option th:selected="${questionBean.review}=='2'" value="2">通过审核</option> <option th:selected="${questionBean.review}=='3'" value="3">未通过审核</option> </select>