java 将 ArrayList 从 Servlet 传递到 JSP
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Passing an ArrayList from a Servlet to JSP
提问by Dhruv Gairola
my model returns an arraylist of strings to servlet in the form
我的模型以以下形式向 servlet 返回一个字符串数组列表
ArrayList<String> currentCustomer = model.getAllCustomers();
i want to pass this arraylist from the servlet to the jsp page. how do i do this? below is what i tried
我想将此数组列表从 servlet 传递到 jsp 页面。我该怎么做呢？下面是我试过的
req.setAttribute("currentCustomer", currentCustomer);
and in the jsp page, i want to use JSTL to loop over each value and display it. how do i do that? its frustrating me to no end. ive scoured the web but to no avail. any help is greatly appreciated.
在jsp页面中，我想使用JSTL来遍历每个值并显示它。我怎么做？它让我无休止地沮丧。我在网上搜索但无济于事。任何帮助是极大的赞赏。
here is the jsp code
这是jsp代码
<%@ taglib uri="http://java.sun.com/jstl/core" prefix="c" %>
<body>
<div>
<c:forEach var="customer" items="currentCustomer">
${customer}
</c:forEach>
</div>
</body>
回答by Filip Spiridonov
Let's make it work :)
让我们让它工作:)
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
...
<c:forEach var="customer" items="${currentCustomer}">
<c:out value="${customer.name}" />
<c:out value="${customer.age}" />
</c:forEach>
P.S. jsp:useBean is another way to go...
PS jsp:useBean 是另一种方法......
P.P.S. I also made a correction in the taglib import. That's one of these hard-visible mistakes when you can look on two different entries and think they are the same :)
PPS 我还在 taglib 导入中进行了更正。当您可以查看两个不同的条目并认为它们相同时，这是这些明显的错误之一:)
回答by Dhruv Gairola
its allrite guys, i solved the problem.. thanks for your help..
它的 allrite 家伙，我解决了问题.. 感谢您的帮助..
apparently the code i was using was outdated (thanks internet!) i was writing this on the header:
显然我使用的代码已经过时（感谢互联网！）我在标题上写了这个：
<%@ taglib uri="http://java.sun.com/jstl/core" prefix="c" %>
while it should have been
虽然它应该是
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
回答by Stan Kurilin
It will be smt like
它会像 smt
<c:forEach var="currentCustomer" items="${customers}">
${currentCustomer.name}
${currentCustomer.age}
</c:forEach>
