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How to pass a hidden value from a jsp to Action class in struts2

 
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Hi I am new to struts2.
I have a form with a table of a list of values.I had a Edit link for every row.Whenever I am clicking the edit row.It fetch the corresponding values to the edit form.But Whenever I change the values in the form and click submit.Its not updating.I think i have to pass the value of the primary key as hidden value to the Action class method.Please find the below code


by this I am getting the values and



now i have set this masterbean as a hidden value in the jsp.Please tell me how to do this.
 
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Try the following Struts2 Hidden Variable Example
 
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