<c:forEach items="${list}" var="type"> {value:${type.counts}, name:'${type.name}'}, </c:forEach> 这串jsp代码什么意思
时间: 2024-04-05 07:32:33 浏览: 106
这段JSP代码使用了JSTL的<c:forEach>标签,它的作用是遍历一个名为"list"的集合,并将每个元素赋值给一个名为"type"的变量。在循环体内,代码将每个元素的"counts"属性的值赋值给"value"属性,将每个元素的"name"属性的值赋值给"name"属性, 最终生成一组JavaScript对象。这些对象的格式可以用于生成图表等可视化工具显示数据。
相关问题
<form:select class="form-control input-sm selectpicker" path="productCode" data-live-search="true" data-max-options="10" data-actions-box="true" title="${productTitle}"> <form:option value="">--${productTitle}--</form:option> <c:forEach items="${ALL_PRODUCTS}" var="item" > <form:option value="${item.productCode}" label="${item.productCode}" data-subtext="${item.productName}"/> </c:forEach> </form:select>如何控制宽度
你可以使用 `style` 属性或者在 `class` 属性中添加自定义的 CSS 类来控制 select 元素的宽度。例如,你可以将 `style` 属性设置为 `width: 200px;` 或者在 `class` 属性中添加一个自定义的 CSS 类来设置宽度。下面是一个示例:
```html
<form:select class="form-control input-sm selectpicker my-custom-class" path="productCode"
data-live-search="true" data-max-options="10" data-actions-box="true"
title="${productTitle}" style="width: 200px;">
<form:option value="">--${productTitle}--</form:option>
<c:forEach items="${ALL_PRODUCTS}" var="item">
<form:option value="${item.productCode}" label="${item.productCode}"
data-subtext="${item.productName}"/>
</c:forEach>
</form:select>
```
在上面的示例中,我添加了一个名为 `my-custom-class` 的自定义 CSS 类,并将 `style` 属性设置为 `width: 200px;`。你可以根据自己的需求修改这些值。
<c:forEach items="" var="">
This is a JSTL (JavaServer Pages Standard Tag Library) tag used in JSP (JavaServer Pages) to iterate over a collection of objects.
The "items" attribute specifies the collection of objects to be iterated over, and the "var" attribute specifies the variable name used to store each object in the collection during each iteration.
For example, if we have a list of names in a variable called "namesList", we can use the forEach tag to iterate over each name in the list and print it out:
<c:forEach items="${namesList}" var="name">
${name}
</c:forEach>
In the above example, ${namesList} is an expression that evaluates to the list of names we want to iterate over, and "name" is the variable name we're using to store each name during each iteration. The ${name} expression is used to print out the current name during each iteration.
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