Create UserService.java

DSA practice/Arrays/UserService.java

@@ -0,0 +1,53 @@
+package com.kainskep.Services;
+
+import java.util.List;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Component;
+
+import com.kainskep.Entities.User;
+import com.kainskep.dao.UserRepository;
+
+@Component
+public class UserService {
+
+	@Autowired
+	private UserRepository userRepository;
+
+	//get all users data
+	public List<User> getAllUsers(){
+		List<User> list = (List<User>)this.userRepository.findAll();		
+		return list;
+	}
+
+	//get single user data by id
+	public User getUserById(int id) {
+		User user = null;
+		try{
+			user=this.userRepository.findById(id);	
+		}
+		catch(Exception e) {
+			e.printStackTrace();
+		}
+		return user;
+	}
+
+	// add a user data
+	public User addUser(User user) {
+		User result = userRepository.save(user);
+		return result;
+	}
+
+	// delete user data
+	public void deleteUser(int uid) {
+		userRepository.deleteById(uid);
+	}
+
+	// update user data
+	public void updateUser(User user, int userId) {
+		user.setId(userId);
+		userRepository.save(user);
+	}
+
+
+}