Sending data to another JSP file from action class

问题:

The main page has link to create new record and one to show all the existing records.

On the create_new_record page I am writing all the data to a file in an action class method called saveRecords and populating a List<Records> in retriveRecords methods.

My action class code:

public class MyRecordes{
  List<RecoredInfo> recoreds= new ArrayList<RecoredInfo>();
}

I have getters and setters for the same records in my action class(I am using Struts 2), but on the main page when I click to show all records (which shows a different JSP page), nothing is displayed. Do I have to use servlets and/or doGet, etc. methods?

EDIT:

Adding code for showList.jsp:

<table>         
<s:iterator value="arrayList" status="status">
<tr>
<td><s:property value="firstName"/> <s:property value="lastName"/>
</td>
</tr>
</s:iterator>
</table>

My action class has an arraylist named arrayList and I am using getters/setters to set the value.

回答1:

The different action will populate the list and return a result of the different JSP page. In the different JSP you can show records using

iterator

Iterator will iterate over a value. An iterable value can be any of: java.util.Collection, java.util.Iterator, java.util.Enumeration, java.util.Map, or an array.

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Whatever you show on the JSP the data should be bound to the beans properties that you can retrieve via OGNL expression and written to the JSP output.

OGNL

OGNL is the Object Graph Navigation Language (see commons-ognl for the full documentation of OGNL). Here, we will cover a few examples of OGNL features that co-exist with the framework. To review basic concepts, refer to OGNL Basics.

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If you are using Struts2 you don't need servlets and/or doGet etc. methods. Struts2 framework implements MVC pattern that you can follow while writing your web application. If you are new to the framework, then better get started from the Tutorials.

Tutorials

The framework documentation is written for active web developers and assumes a working knowledge about how Java web applications are built. For more about the underlying nuts and bolts, see the Key Technologies Primer.

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