struts2 + display tags + maps

[vanlalhmangaiha khiangte]

Hi all,

I am using struts2 + display tags for pagination.
In my StudentAction.java, i have qualificationMap which has a mapping qualification code with qualification name.

private Map<String,String> qualificationMap=new HashMap<String,String>();

In my query.jsp, the following is the display part

 <display:table id="student" name="studentList" pagesize="10" export="true" requestURI="/queryStudent" >
				<display:column property="std_fname" title="std_fname"  />
				<display:column property="std_lname" title="std_lname" />
				<display:column property="father_name" title="father_name" />
				<s:property value="qualificationMap[qualification_code]"/>   // ***** PROBLEM HERE *******
				<display:column property="qualification_code"></display:column>
				<display:column property="contact_no" sortable="true" />
				<display:column property="address" sortable="true" />
				<display:column property="gender" sortable="true" />
				<display:column property="category" sortable="true" />
					
		 <display:setProperty name="paging.banner.placement" value="bottom" />
		</display:table>

1. I am only able to display the qualification code and not the qualification name using display:column
2. The qualification name is the one that needs to displayed.


Regards,
Vanlal

[Jesus Mireles]

Whats the error. Do you have a getter for that map?

[vanlalhmangaiha khiangte]

Yes i have a getter and setter ...
If i use the struts property like below , i am able to get the value

<s:property value="qualificationMap[2]"/>  

I can display qualification code like below

<display:column title="Qualification code" >${student.qualification_code} </display:column>
  OR
<display:column property="qualification_code" sortable="true" />

But i don't know how to combine this with display tags..

Regards,
Vanlal

[Jesus Mireles]

Have you tried setting the value to some variable as so:

<s:set name="qualname" value="qualificationMap[2]" /> <display:column property="qualname" sortable="true" />

[vanlalhmangaiha khiangte]

Hi Lucas,

	<display:column title="Qualification code" >${student.qualification_code}</display:column>

The above line will give me some integer values like 2,3,4 etc...


Map ===> 2 , Graduate
3, P.G.

The below will give me the string value mapped to this integer in struts tag

<s:property value="qualificationMap[qualification_code]"/>  

So, i do not know how to do this using display tags ....

	<display:column title="Qualification code" >qualificationMap.${student.qualification_code}</display:column> // **** PROBLEM HERE ****

Regards,
Vanlal

[Jesus Mireles]

Again ... since you can get the value using just struts tags im saying to set the value to some variable and using it in the display tag.

Lucas Mireles wrote:Have you tried setting the value to some variable as so:

<s:set name="qualname" value="qualificationMap[2]" /> <display:column property="qualname" sortable="true" />

[vanlalhmangaiha khiangte]

Hi Lucas,

Lucas Mireles wrote:

Lucas Mireles wrote:Have you tried setting the value to some variable as so:

<s:set name="qualname" value="qualificationMap[2]" /> <display:column property="qualname" sortable="true" />

This doesn't work .. the number inside qualificationMap varies from record to record.

<s:set name="qualname" value="qualificationMap[${student.qualification_code}]" />

Error : "value" does not support runtime expression.

regards,
Vanlal

[Jesus Mireles]

I obviously have very little understanding of your actual project/problem ... so i'm going to assume some things in my response but maybe what you need to do is provide a getter in your student object like getQualificationName which takes the qualification code and returns the mapped value. My understanding is that this student object has some codes which in turn you have mapped to display values which you are keeping in a map.

This should solve the problem if I'm understanding correctly ...

[vanlalhmangaiha khiangte]

Hi Lucas,

I am using struts2 + hibernate for the current project ...
I cannot just put a getter / setter / object in my Student class because this in turn will be mapped with the database <Hibernate used here>
I have a List<Student> which will contain student's details. this is student's table.
Eg
"std_fname"-"std_lname"-"father_name"-"qualification_code"-"contact_no"-"address"-"gender"-"category"
Johnny-Quest-Ramos-12-93232323-LA-Male-General

Qualfication code is mapped with a qualification name .. i.e 1->BE , 2->ME etc... This is a seperate table ...

Using struts tags , this will work when iterating each and every record in the studentList .
My StudentAction class contains getters for qualificationMap

<s:property value="qualificationMap[qualification_code]"/>  

Now when i am using displaytags , i iterate over the studentList, but when i come to qualification_code

 <display:column property="qualification_code"  />  

This will give me only the integer part for each and every student ... This values keeps on changing for each and every student.
So i cannot just set one value.

But i want to display the mapped name from qualficationMap which is inside my StudentAction class.

So i tried combining different things like the qualificationMap[qualification_code] but it does not work.

Hope that you'll be able to understand the problem.
If i just know how to get the dynamic value in the display tag and get the mapped value from the Map, this will defenitely solve the problem.

Regards,
Vanlal

[vanlalhmangaiha khiangte]

Hi all,

After spending lots and lots of hours on this , finally got the solution ..

 <display:column titleKey="student.qualification_code"><s:property value="qualificationMap[#attr.student.qualification_code]" /></display:column>

The above code works absolutely 100% Yipeee


regards,
Vanlal

[Aniket Kumbhoje]

I am also working on display tag but i have small problem..i am giving my code below..

<display:table  id="employeeList" name="employeeList" cellpadding="7" cellspacing="5" pagesize="5" export="true" requestURI="/viewEmployeeAction">
			    <display:column property="employeeNo" title="EMPLOYEE_NO" sortable="true"/>
			    <display:column property="firstName" title="FIRST_NAME" sortable="true"/>
                            <display:column property="lastName" title="LAST_NAME" sortable="true"/>
			    <display:column property="position.unit.section.department.departmentName" title="Dept" sortable="true"/>
			    <display:column property="joiningDate" title="JOINING_DATE"  sortable="true"/>
			    <display:column property="contactInformation.contact.mobileNo" title="Mobile No." sortable="true"/>
			    <display:column property="contactInformation.contact.emailId" title="Email" sortable="true"/>
			    <display:setProperty name="paging.banner.placement" value="bottom"/>
			</display:table>

but i want different format which is not working..

<display:table  id="employeeList" name="employeeList" cellpadding="7" cellspacing="5" pagesize="5" export="true" requestURI="/viewEmployeeAction">
			    <display:column property="employeeNo" title="EMPLOYEE_NO" sortable="true"/>

                            <display:column property="firstName+'  '+lastName" title="EMP_NAME" sortable="true"/>  //*****Problem Here*******//

                            <display:column property="" title="LAST_NAME" sortable="true"/>
			    <display:column property="position.unit.section.department.departmentName" title="Dept" sortable="true"/>
			    <display:column property="joiningDate" title="JOINING_DATE"  sortable="true"/>
			    <display:column property="contactInformation.contact.mobileNo" title="Mobile No." sortable="true"/>
			    <display:column property="contactInformation.contact.emailId" title="Email" sortable="true"/>
			    <display:setProperty name="paging.banner.placement" value="bottom"/>
			</display:table>

above example i want to display first name and last name in one column...please any one give me solution Thanks in Advance..