Using Struts 2 Select Tag for dynamic values

[Abdul Mujeeb Md]

Hi,

I have an ArrayList which contains String[] array objects. How do i display a selected object using Struts 2 select tag?

Eg:

String[] strValues; 
strValues[0] = {'1','Apple','Red'};
strValues[0] = {'2','Banana','Yellow'};
strValues[0] = {'3','Leaves','Green'};

ArraList.add(strValues);

How do i access the 1, Apple using from the dropdown.

Thanks.

[Ankit Garg]

Abdul I don't think that code will compile. You are storing single quoted Strings arrays into an uninitialized one dimensional String array. And there is a logical mistake too, you are assigning all the values on the same index location i.e. 0. Then you have ArraList about which we don't know if it is a property inside your action or something else. Please clarify all this first...

[Nishan Patel]

Ankit Garg wrote:Abdul I don't think that code will compile. You are storing single quoted Strings arrays into an uninitialized one dimensional String array. And there is a logical mistake too, you are assigning all the values on the same index location i.e. 0. Then you have ArraList about which we don't know if it is a property inside your action or something else. Please clarify all this first...

Hi Ankit, yes code gives compile time error.

[Abdul Mujeeb Md]

Hi Ankit,

Extremely sorry. That was a typo. I have written it as an example. The code has compiled successfully and i am able to access the values of the String Array using <s:property> tag.

The exact representation goes this way.

String[] str1 = {"1","Apple","Red"};

I am unable to access the same in the drop down. I hope i made myself clear.

Thanks

[Nishan Patel]

Convert your array to list using

  String[] str1 = {"1","Apple","Red"};
	   List arrayList = Arrays.asList(str1);  

above code in your action class. Make arrayList global variable. Now your Jsp code looks like..

  <s:select label="Select Day" 
    name="xyz" 
    headerKey="1"
    headerValue="Please Select"
    list="arrayList"
    />  

[Abdul Mujeeb Md]

Nishan,

Thanks for your response.

That works fine for a single String Array.

String[] str1 = {"1","Apple","Red"};
String[] str2 = {"2","Banana","Yellow"};
String[] str3 = {"3","Leaves","Green"};

arrList.add(str1);
arrList.add(str2);
arrList.add(str3);

How do we extend it to work for the above scenario. What if i have to list the values Red, Yellow, Green in the drop down and access the selected value in the Action using its key i.e; 1 or 2 or 3

Thanks.

[Nishan Patel]

If you want to use <s:select with multiple list use ><s:merge...> tag..

refer below link for more details ...

Struts 2 merge

or

Java Ranch

[Abdul Mujeeb Md]

Hi Nishan,

You mean we have to have the String Array converted to a List to be accessed in the Struts Tag? Isn't there any other way we can achieve it?
I am using a Method which returns me an ArrayList(which contains String Array as its objects). The back end logic is hidden from me, what i only have is an ArrayList which has got the data in the said format. As I have only a single getter/setter method for the above ArrayList, i need to iterate it and fetch the data from it.

ArrayList arlInfo = (ArrayList)friutInfoDB.retrieveFruitInfo();
arlFruitInfo.set(arlInfo);

Now i have to only use arlFruitInfo to access the data from it.

How can this be done in the select drop-down.

Thanks.

[Abdul Mujeeb Md]

Hi,

Is there a way to use the select tag to display the bean contents, contained in a collection?

Eg:

CUserBean cUser = new CUser();
cUser.setId(10);
cUser.setName("xxx");
cUser.setAge(30);
ArrayList arlUserInfo = new ArrayList();
arlUserInfo.add(cUser);

How do we access "arlUserInfo" using Struts 2 Select option?

Thanks.

[Mike Cobelmach]

You must have appropriate getter for list arlUserInfo. For access this in JSP use attributes list, listkey and listvalue of select tag.

<s:select name="mySelectedUser" list="arlUserInfo" listKey="id" listValue="name" />