My senario is ,I have edit link for every record, when i click the edit of a particular record then edit should be changed to save button, and field values to text boxes of that record only and that record should saved when updated.  

The below code works, when edit is clicked, all edit links are converted to save button and field values to text boxes . where it should not happen.  It should  function based on record...

Page:

<apex:page controller="Employ" sidebar="false" showHeader="true" id="pg">

<apex:pageBlock title="Employee List" id="pb2">
<apex:form id="f1" >
 <apex:outputPanel rendered="{!table1}">
<apex:pageBlockTable value="{!emplst}" var="e">
<apex:column headerValue="Action">
  <apex:commandLink value="edit" action="{!edit}"/>
   </apex:column>
<apex:column value="{!e.name}"/>
<apex:column value="{!e.Email__c}"/>
<apex:column value="{!e.Phone__c}"/>
</apex:pageBlockTable>
</apex:outputPanel>

 <apex:outputPanel rendered="{!table2}">
<apex:pageBlockTable value="{!emplst}" var="emp">
<apex:column headerValue="Action">
<apex:commandButton value="save" action="{!save}"/>
</apex:column>
<apex:column ><apex:inputText value="{!emp.name}"/></apex:column>
<apex:column ><apex:inputText value="{!emp.Email__c}"/></apex:column>
<apex:column ><apex:inputText value="{!emp.Phone__c}"/></apex:column>
  
</apex:pageBlockTable>
</apex:outputPanel>

</apex:form>
</apex:pageBlock>
</apex:page>

Controller:

public with sharing class Employ{
    boolean Table1=true;
    boolean Table2=false;


        public void save() {
        table2=false;
        table1=true;
        //system.debug('*************'+emplst);
        update emplst;
               
    }

    public boolean getTable2() {
        return Table2;
    }


  public boolean gettable1(){
 return table1;
 }
 

    public PageReference edit() {
        table1=false;
        table2=true;
        return null;
    }
    List<Employ__c> emplst;
    public List<Employ__c> 
    getemplst(){
    emplst=[select name,id,phone__c,Email__c from Employ__c];
        return emplst;
   }


  }

  --Regards,

    forceapp.