用thymeleaf用标签给页面select下拉框赋值
<div class="form-group">
<label>性别
</label> <select class="form-control" id="sex">
<option value="1" th:selected="${sex=='1'}">男
</option>
<option value="2" th:selected="${sex=='2'}">女
</option>
</select>
</div>
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