How to add HTTP status code with error message in spring - spring-data-jpa

Question

I created one spring data jpa Application. In this application my method request is GET. but if I am trying to access that method Request url as post request. In this situation I want to know how to add HTTP status code 405(Method Not Allowed) with my custom error message.
Here is my code snippet
DepartmentModel
package com.demo.model;
import java.io.Serializable;
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.Table;
#Entity
#Table(name = "department")
public class DepartmentModel implements Serializable {
private static final long serialVersionUID = 1L;
#Id
public Integer ndeptid;
public String sdeptname ;
public Integer ninstid ;
public Boolean bislocked;
public String sclientdeptid;
public Integer nsurveymethodid;
public Boolean bisjointuse;
public Integer ntempdeptid;
public Boolean balternatejointusepercentage;
public Integer ndivid;
//getter and setter
DepartmentRepository
#Repository
public interface DepaertmentRepository extends JpaRepository<DepartmentModel, Integer>
{
#Query("select new map(dep.sdeptname as sdeptname)"
+ " from DepartmentModel as dep where dep.ninstid=60")
Set<DepartmentModel> findBySDepName();
}
DepartmentService
#Service
public class DepartmentService
{
#Autowired
DepaertmentRepository depRepo;
public Set<DepartmentModel> findDepName()
{
return depRepo.findBySDepName();
}
}
DepartmentController
#RestController
#RequestMapping("/SpaceStudy/SpaceAdmin")
public class DepartmentController {
#Autowired
DepartmentService depService;
#CrossOrigin(origins="*")
#GetMapping("AccountMaintenance/LoadDepartment")
//#ResponseStatus( value = HttpStatus.METHOD_NOT_ALLOWED)
public Set<DepartmentModel> findDepName() {
return depService.findDepName();
}
}
can any one help me how to add HTTP status code (405) with proper message when i am accessing GET request as post

Answer 1

You can override the method handleHttpRequestMethodNotSupported of ResponseEntityExceptionHandler and implement your own error message object. For example:
#Override
protected ResponseEntity<Object> handleHttpRequestMethodNotSupported(HttpRequestMethodNotSupportedException ex, HttpHeaders headers, HttpStatus status, WebRequest req) {
headers.setAllow(ex.getSupportedHttpMethods());
ErrorMessage errorMessage = ErrorMessage.of(
status.value(),
"You cannot make this request - the method is not allowed!",
ex.getMessage(),
((ServletWebRequest) req).getRequest().getServletPath()
);
return new ResponseEntity<>(errorMessage, headers, status);
}
#Value(staticConstructor = "of")
private static class ErrorMessage {
private Instant timestamp = Instant.now();
private Integer status;
private String error;
private String message;
private String path;
}
See my full demo for more info.
You can override not only this method of ResponseEntityExceptionHandler but all the remaining to get custom handling of other exceptions.
Note: you can use another approach to handle exceptions (or use both) - implement an exception handler.
UPDATE
It's necessary to add #ControllerAdvice annotation to the class that extended ResponseEntityExceptionHandler.