jstl / jsp - 遍历bean的向量 [英] jstl/jsp - iterating over a vector of beans

问题描述

我有一个bean矢量，用于保存我想在jsp页面中显示的信息。我目前只是使用标准的java表达式来显示它，我想研究使用jstl来分离问题。这有可能，怎么样？我一直在谷歌搜索，但我似乎找不到任何东西。

I have a vector of beans that holds information I want to display in my jsp page. I'm currently just using standard java expressions to display this, I want to look into using jstl to separate concerns. Is this possible, and how? I've been googling but I can't seem to find anything.

推荐答案

我认为你所寻找的是的 < c：foreach> 标记。

I think that what you are looking for is the < c:foreach > tag.

例如，在MyClass实例上打印myInt属性值（定义如下）：

for example, printing the value myInt property on instances of MyClass (defined below):

<c:foreach items="${vectors name}" var="pos" >
       <!-- print the value of myInt for each position of the array. 
            Method getMyInt() must exist in pos object.-->
       <c:out value="${pos.myInt}"/>

       <!-- print the value of myInt for each composed instance.
            Method getRelatedInstance() must exist in pos object.  -->
       <c:out value="${pos.relatedInstance.myInt}"/>
</c:foreach> 

其中矢量名称是矢量的名称，例如，做一个

where vector name is the name of the vector ,for example, after doing a

假设你有一个类myClass。

Suppose you have a class myClass.

public class MyClass{
   private MyClass relatedInstance;     
   //some members and methods

   public int getMyInt(){
     //return something
   }

   public MyClass getRelatedInstance(){
     return this.relatedInstance;
}

List<myClass> my_vector = getFilledList();
request.setAttribute("vectors name",my_vector)

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