Jersey - get parameter always null - spring

Question

I changed my code according to R4J answer.
I think there's something more to correct since I can't display anything now...
result I get - console is clear (no errors)
Could anyone be so kind and help me find the issue?
Below I describe my project:
DB:
database table "users"
TestUser.java
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.Table;
#Entity
#Table(name = "USERS")
public class TestUser {
#Id
#GeneratedValue(strategy = GenerationType.AUTO)
private Integer id;
#Column(name = "email", nullable = false)
private String email;
#Column(name = "password", nullable = false)
private String password;
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
}
TestService.class
import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import com.test.testapp.dao.UserDao;
import com.test.testapp.model.TestUser;
#Component
public class TestService {
#Autowired
UserDao userDao;
public List<TestUser> getUsers() {
return userDao.findAll();
}
}
UserDao.class
import java.util.List;
import javax.persistence.PersistenceException;
import com.test.testapp.model.TestUser;
public interface UserDao /* extends CrudRepository<TestUser, Integer>*/{
public List<TestUser> findAll() throws PersistenceException;
}
UserDaoImpl.java
import java.util.List;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
import javax.transaction.Transactional;
import org.jvnet.hk2.annotations.Service;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Repository;
import com.test.testapp.dao.UserDao;
import com.test.testapp.model.TestUser;
#Repository("userDao")
#Service
public class UserDaoImpl implements UserDao {
#Autowired
private EntityManager entityManager;
#PersistenceContext
public void setEntityManager(EntityManager entityManager) {
this.entityManager = entityManager;
}
public TestUser findPersonById(Integer id) {
return entityManager.find(TestUser.class, id);
}
#Override
#Transactional
public List<TestUser> findAll() {
try {
return entityManager.createQuery("SELECT u FROM Users u ORDER BY p.id", TestUser.class).getResultList();
} finally {
entityManager.close();
}
}
}
TestWebApi.java
import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.Produces;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.Response;
#Controller
#Path("test")
public interface TestWebApi {
#GET
#Produces(MediaType.APPLICATION_JSON)
#Path("/")
public Response getUsers();
}
TestWebApiImpl.java
import java.util.List;
import javax.inject.Inject;
import javax.ws.rs.core.Response;
import com.test.testapp.model.TestUser;
import com.test.testapp.service.TestService;
import com.test.testapp.web.TestWebApi;
public class TestWebApiImpl implements TestWebApi {
#Inject
TestService testService;
#Override
public Response getUsers() {
List<TestUser> test = testService.getUsers();
return Response.ok().entity(test).build();
}
}

Answer 1

You are mixing JAX-RS annotations with Spring-MVC annotations. If you want to stick to JAX-RS then your code should look like this:
#Path("users")
#Component
public class UserController {
#Inject
UserService userService;
#GET
#Produces(MediaType.APPLICATION_JSON)
#Path("/")
public List<User> getUsers() {
return userService.findAll();
}
#GET
#Path("/users/{name}")
#Produces(MediaType.APPLICATION_JSON)
public Response getUserByName(#NotNull #PathParam("name") String username) {
User user = userService.findByName(username);
return Response.ok().entity(user).build();
}
}
Currently, you have #RestController on your Class which makes it a Spring Rest Controller. So Spring scans all methods and finds '#RequestMapping("/user/{name}")' and '#RequestMapping("/users")' so it binds these methods to default GET operations and ignores completely #PathVariable annotation because it comes from JAX-RS not Spring.
Spring-MVC version of your code would be:
#RestController
#RequestMapping("/")
public class UserController {
#Inject
UserService userService;
#RequestMapping(value = "/users", method = RequestMethod.GET, produces = MediaType.APPLICATION_JSON_VALUE)
public List<User> getUsers() {
return userService.findAll();
}
#RequestMapping(value = "/users/{name}", method = RequestMethod.GET, produces = MediaType.APPLICATION_JSON_VALUE)
public Response getUserByName(#NotNull #PathVariable("name") String username) {
User user = userService.findByName(username);
return Response.ok().entity(user).build();
}
}