Web2.0 Tutorials » iterator http://www.zulutown.com/blog All the Guides You Need to Become a Web2.0 Expert Wed, 24 Aug 2011 10:06:02 +0000 en hourly 1 http://wordpress.org/?v=3.3.1 Accessing current item properties in a Struts2 iterator http://www.zulutown.com/blog/2009/01/21/accessing-current-item-properties-in-a-struts2-iterator/ http://www.zulutown.com/blog/2009/01/21/accessing-current-item-properties-in-a-struts2-iterator/#comments Wed, 21 Jan 2009 17:21:10 +0000 Zulutown Webmaster http://www.zulutown.com/blog/?p=17 Often you can experience some troubles accessing correctly the objects (and their properties) on which you’re iterating through a iterator tag.

Let’s consider this action that simply returns an Item list obtained from our business service.

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public class MyAction extends ActionSupport {
  private List<MyItem> myList;
  private MyService myService;
 
  public String myMethod() {
    myList = myService.getItemList();
    return ActionSupport.SUCCESS;
 }
  public List<MyItem> getMyList() {
    return myList;
  }
}

The MyItem bean class:

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public class MyItem {
  private String name;
  public String getName() {
    return name;
  }
  public void setName(String name) {
    this.name = name;
  }
}

In the jsp we iterate on myList (that results in the execution of getMyList() in the action) and we try to display the name property of each item (defined in the id attribute of the iterator tag) that calls the getName() method of the Item bean.

These are the results:

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<s:iterator value="myList" status="status" id="item" > 
<s:property value="%{attr.item.name}"/> Doesn't work 
<s:property value="%{#attr.item.name}"/> Works 
<s:property value="attr.item.name"/> Doesn't work 
<s:property value="#attr.item.name"/> Works 
<s:property value="item.name"/> Doesn't work 
<s:property value="name"/> Works 
<s:property value="#attr.item.name"/> Works 
</s:iterator>

I hope this little test can be useful.

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