first commit

src/main/java/com/owrawww/service/UserService.java

@@ -0,0 +1,44 @@
+package com.owrawww.service;
+
+import com.owrawww.domain.User;
+import com.owrawww.domain.mapper.UserMapper;
+import lombok.RequiredArgsConstructor;
+import org.springframework.security.core.userdetails.UserDetails;
+import org.springframework.security.core.userdetails.UserDetailsService;
+import org.springframework.security.core.userdetails.UsernameNotFoundException;
+import org.springframework.security.crypto.password.PasswordEncoder;
+import org.springframework.stereotype.Service;
+
+import java.util.List;
+
+@Service
+@RequiredArgsConstructor
+public class UserService implements UserDetailsService {
+
+    private final UserMapper userMapper;
+    private final PasswordEncoder passwordEncoder;
+
+    @Override
+    public UserDetails loadUserByUsername(String username) throws UsernameNotFoundException {
+        User user = userMapper.findByUsername(username)
+                .orElseThrow(() -> new UsernameNotFoundException("사용자를 찾을 수 없습니다: " + username));
+
+        return org.springframework.security.core.userdetails.User.builder()
+                .username(user.getUsername())
+                .password(user.getPassword())
+                .roles(user.getRole().replace("ROLE_", ""))
+                .disabled(!user.isEnabled())
+                .build();
+    }
+
+    public List<User> findAll() {
+        return userMapper.findAll();
+    }
+
+    public void register(User user) {
+        user.setPassword(passwordEncoder.encode(user.getPassword()));
+        user.setRole("ROLE_USER");
+        user.setEnabled(true);
+        userMapper.insert(user);
+    }
+}