org.springframework.web.bind.MissingServletRequestParameterException: Required int parameter - spring

Question

Hi i am new for WebServices and In my My-Sql Database I have student table with some columns those are "user_id", and "name" and "marks"
I want to update one row based on userId for this i wrote below code but i am getting exception like below can some one help me please
Controller [com.ensis.sample.controller.SampleController]
Method [public com.ensis.sample.model.StatusObject com.ensis.sample.controller.SampleController.updateStudentListById(int)]
org.springframework.web.bind.MissingServletRequestParameterException: Required int parameter 'userId' is not present
controller:-
#RequestMapping(value="/update",method=RequestMethod.POST,produces={"application/json"})
#ResponseBody
public StatusObject updateStudentListById(#RequestParam int userId){
return userService.updateStudentDetailsById(userId);
}
UserService:-
#Transactional
public StatusObject updateStudentDetailsById(int id){
Users users = usersdao.updateStudentDetailsById(id);
if(users!=null){
users.setName("Sample");
users.setMarks(99.99);
}
StatusObject statusObject = new StatusObject();
boolean status = usersdao.updateUser(users);
if(status==true){
statusObject.setStatus(false);
statusObject.setMessage("Success");
return statusObject;
}else{
statusObject.setStatus(true);
statusObject.setMessage("Failure");
return statusObject;
}
}
UserDao:-
public Users updateStudentDetailsById(int userId){
System.out.println("UserId is=====>"+userId);
String hql = "FROM Users s WHERE " + "s.user_id = :userId";
Session session = sessionFactory.getCurrentSession();
Query query = session.createQuery(hql);
query.setParameter("user_id", userId);
List<?>list = query.list();
Iterator<?>itr = list.iterator();
if(itr.hasNext()){
Users users = (Users)itr.next();
return users;
}
session.flush();
session.clear();
return null;
}
Users:-
#Entity
#Table(name = "student")
public class Users {
#Id
private int user_id;
private String name;
private int rank;
private double marks;
public int getUser_id() {
return user_id;
}
public void setUser_id(int user_id) {
this.user_id = user_id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public int getRank() {
return rank;
}
public void setRank(int rank) {
this.rank = rank;
}
public double getMarks() {
return marks;
}
public void setMarks(double marks) {
this.marks = marks;
}

Answer 1

#Krish, when you are posting something, you usually use Spring's #RequestBodyas seen below:
#RequestMapping(value="/update",method=RequestMethod.POST,produces={"application/json"})
#ResponseBody
public StatusObject updateStudentListById(#RequestBody User user){
return userService.updateStudentDetailsById(userId);
}
You need to pass the JSON object to this controller method. Spring will deserialize the JSON for you.
When you say #RequestParam, it expects to find the request parameters like
/update?userId=1
PS: It is not good practice to send just the ID to update a resource.

Answer 2

Are you using it as a RestController.The excecption is coming from the controller as it expects a parameter from the client.Please verify if you are passing the userID in the pathParam.