使用intellij和spring boot，用代码设计并实现shipping and transportation services，用restful api，结合spring mvc,jpa,mysql和jwt，这些api可以直接用postapi测试

好的，以下是一个简单的Shipping和Transportation Services的API设计和实现示例：

1. 首先，我们需要定义一个实体类来表示货物信息：

@Entity
public class Shipping {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;
    private String name;
    private String description;
    private Double weight;
    private String origin;
    private String destination;
    //其他属性
    //getter和setter方法
}

2. 接下来，我们需要定义一个Repository类来处理数据持久化：

@Repository
public interface ShippingRepository extends JpaRepository<Shipping, Long> {
    //其他方法
}

3. 然后，我们需要定义一个Service类来处理业务逻辑：

@Service
public class ShippingService {
    @Autowired
    private ShippingRepository shippingRepository;

    public List<Shipping> getAllShippings() {
        return shippingRepository.findAll();
    }

    public Shipping getShippingById(Long id) {
        return shippingRepository.findById(id).orElse(null);
    }

    public void addShipping(Shipping shipping) {
        shippingRepository.save(shipping);
    }

    public void updateShipping(Long id, Shipping shipping) {
        Shipping oldShipping = shippingRepository.findById(id).orElse(null);
        if (oldShipping != null) {
            oldShipping.setName(shipping.getName());
            oldShipping.setDescription(shipping.getDescription());
            oldShipping.setWeight(shipping.getWeight());
            oldShipping.setOrigin(shipping.getOrigin());
            oldShipping.setDestination(shipping.getDestination());
            //其他属性
            shippingRepository.save(oldShipping);
        }
    }

    public void deleteShipping(Long id) {
        shippingRepository.deleteById(id);
    }
}

4. 接下来，我们需要定义一个Controller类来处理HTTP请求和响应：

@RestController
@RequestMapping("/api")
public class ShippingController {
    @Autowired
    private ShippingService shippingService;

    @GetMapping("/shippings")
    public List<Shipping> getAllShippings() {
        return shippingService.getAllShippings();
    }

    @GetMapping("/shippings/{id}")
    public Shipping getShippingById(@PathVariable Long id) {
        return shippingService.getShippingById(id);
    }

    @PostMapping("/shippings")
    public void addShipping(@RequestBody Shipping shipping) {
        shippingService.addShipping(shipping);
    }

    @PutMapping("/shippings/{id}")
    public void updateShipping(@PathVariable Long id, @RequestBody Shipping shipping) {
        shippingService.updateShipping(id, shipping);
    }

    @DeleteMapping("/shippings/{id}")
    public void deleteShipping(@PathVariable Long id) {
        shippingService.deleteShipping(id);
    }
}

5. 最后，我们需要配置JWT实现身份验证和授权：

@Configuration
@EnableWebSecurity
public class SecurityConfig extends WebSecurityConfigurerAdapter {
    @Autowired
    private UserDetailsService userDetailsService;
    @Autowired
    private JwtRequestFilter jwtRequestFilter;

    @Autowired
    public void configureGlobal(AuthenticationManagerBuilder auth) throws Exception {
        auth.userDetailsService(userDetailsService).passwordEncoder(passwordEncoder());
    }

    @Bean
    public PasswordEncoder passwordEncoder() {
        return new BCryptPasswordEncoder();
    }

    @Bean
    @Override
    public AuthenticationManager authenticationManagerBean() throws Exception {
        return super.authenticationManagerBean();
    }

    @Override
    protected void configure(HttpSecurity http) throws Exception {
        http.csrf().disable()
            .authorizeRequests().antMatchers("/authenticate").permitAll()
            .anyRequest().authenticated()
            .and().sessionManagement().sessionCreationPolicy(SessionCreationPolicy.STATELESS);
        http.addFilterBefore(jwtRequestFilter, UsernamePasswordAuthenticationFilter.class);
    }
}

现在，我们可以使用POSTMAN工具测试API了。例如：

- GET /api/shippings：获取所有货物信息
- GET /api/shippings/1：根据ID获取货物信息
- POST /api/shippings：添加新的货物信息
- PUT /api/shippings/1：根据ID更新货物信息
- DELETE /api/shippings/1：根据ID删除货物信息

当然，这只是一个简单的示例，实际的API设计和实现可能更加复杂。