Html Thymeleaf - 如何将选中的属性添加到有条件的输入中
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Thymeleaf - How to add checked attribute to input conditionally
提问by mtyurt
As you know, inputcomponent has an attribute, checkedto whether mark the checkbox as enabled by default or not.
如您所知，input组件有一个属性，checked用于是否将复选框标记为默认启用。
<input type="checkbox" name="mycheckbox" checked="checked"/>
To disable the checkbox by default, the checkedexception should be declared. Is it possible to set checkedattribute by a flag in Thymeleaf?
要默认禁用复选框，checked应声明异常。是否可以checked通过 Thymeleaf 中的标志设置属性？
回答by Faraj Farook
According to the official thymeleaf documentation
根据 thymeleaf 官方文档
http://www.thymeleaf.org/doc/tutorials/2.1/usingthymeleaf.html#fixed-value-boolean-attributes
http://www.thymeleaf.org/doc/tutorials/2.1/usingthymeleaf.html#fixed-value-boolean-attributes
th:checkedis considered as a fixed-value Boolean attribute.
th:checked被视为固定值布尔属性。
<input type="checkbox" name="active" th:checked="${user.active}" />
Where user.activeshould be a boolean.
哪里user.active应该是boolean.
So in your case it should be as Andreamentioned,
所以在你的情况下，应该像安德里亚提到的那样，
<input type="checkbox" name="mycheckbox" th:checked="${flag}" />
回答by mtyurt
After digging a little, I found out the solution. There is th:checkedattribute for that purpose.
经过一番挖掘，我找到了解决方案。th:checked为此目的有属性。
This works:
这有效：
<input type="checkbox" name="mycheckbox" th:checked="${flag} ? 'checked'">
This fails:
这失败了：
<input type="checkbox" name="mycheckbox" th:checked="${flag} ? 'checked' : ''">
If checked=""is set to inputcomponent, it's marked checked. This method is valid for custom attributesth:attralso. Consider following example:
如果checked=""设置为input组件，则标记为选中。此方法也适用于自定义属性th:attr。考虑以下示例：
<p th:attr="customattr=${flag}?'attr'></p>
If flagis true, it's replaced with:
如果flag为真，则替换为：
<p customattr="attr"></p>
If flagis false, it's replaced with:
如果flag为假，则替换为：
<p></p>
回答by Ameera Najah Kv
You can conditionally add checked attribute to radio input in thymeleaf as below:
您可以有条件地将选中的属性添加到百里香叶中的无线电输入，如下所示：
<input type="radio" th:checked="${sales.sales_head.sales_type} == CREDIT" class="sales_type" value="CREDIT" name="sales_type" >
Here if sales_type is CREDIT the radio will be checked. Otherwise it remains unchecked.
在这里，如果 sales_type 是 CREDIT，将检查收音机。否则它保持未选中状态。
回答by redochka
Neither suggested solutions worked for me.
没有建议的解决方案对我有用。
This one worked:
这个有效：
th:checked="${#strings.equals(param.myRequestParameterXYZ, 'foobar')}"
回答by Abdur Rahman
I faced problem for showing checkbox (tick mark on/off) in thymeleaf based on true or false value for the property. I solved it by following way.
我遇到了根据属性的 true 或 false 值在 thymeleaf 中显示复选框（勾选标记开/关）的问题。我通过以下方式解决了它。
Method in controller
控制器中的方法
@RequestMapping(value = "/test")
public String showCheckbox(Model model) {
boolean myBooleanVariable = false;
model.addAttribute("myBooleanVariable", myBooleanVariable);
return "sample-checkbox";
}
In HTML page:
在 HTML 页面中：
<input type="checkbox" name="myBooleanVariable" th:checked="${myBooleanVariable}"/>
