java - Get specific value from Object in spring controller -

i have student class, studentdao class, studentdetails class , studentcontroller
student class have following instances:

 private string studentid;  private string studentname;  private string studentgrade; 

studentdao gets these details db, studentdetails class returns list of these details in following method:-

public list<student> getspecificstudentinfo(string studentid) {     list<student> studentinfo=studentdao.getspecificstudentinfo(studentid);          return studentinfo;  } 

in controller use hashmap student details like

public map<string, object> referencedata(httpservletrequest req)throws servletexception, ioexception  {      string studentid=req.getparameter("studentid");     map<string, object> studentrecord = new hashmap<string, object>(); studentrecord.put("students",studentdetails.getspecificstudentinfo(studentid));     return studentrecord; } 

i m able display these values in jsp using students.studentname, students.studentgrade, etc. 1 requirement.

but problem want use studentname , studentgrade further in controller in referencedata method (before return statement ofcourse) m not getting right way.

i don't think did understand question. in referencedata, have studentid request. still extract grade using loop on list.

public map<string, object> referencedata(httpservletrequest req)throws servletexception, ioexception  {      string studentid=req.getparameter("studentid");     map<string, object> studentrecord = new hashmap<string, object>();     list<student> listofstudents = studentdetails.getspecificstudentinfo(studentid);      string studentgrad = getgradefor(studentid);  studentrecord.put("students",listofstudents);     return studentrecord; } /* check nulls, empty list etc. */ public string getgradefor(list<student> listofstudent, string id) {        (student student: listofstudent) {             if (student.getid().equals(id)) return student.getgrade();        }        return null; } 

or build database query more , 1 object in list. student looking for.