Springboot 内部服务调用方式

来源：脚本之家时间：2022-03-14 19:30:36

Eureka注册的服务之间互相调用

1.请求方

启动类添加注解,扫描Eureka 中的全部服务

@SpringBootApplication
@EnableEurekaClient
@EnableFeignClients
public class LoginServiceApplication {    
    public static void main(String[] args) {
        new SpringApplicationBuilder(LoginServiceApplication.class).web(true).run(args);
    }    
}

pom.xml 添加包 (版本号根据实际选择)


    org.springframework.cloud
    spring-cloud-starter-feign
    1.4.6.RELEASE

创建接口类

@FeignClient(name="hello-service") //spring service name
public interface FeignVehicle {
    
    @RequestMapping(value="/hello", method = RequestMethod.GET)
    @ResponseBody
    public List hello(@RequestParam Map params);
}

实现类注入此接口类

@Autowired
FeignVehicle feignVehicle;

使用的时候直接按照正常调用方式即可

Map map = new HashMap();
feignVehicle.hello(map);

跨服务调用的时候出现token信息取不到,在发送方添加拦截器

@Configuration
public class FeignConfiguration {
 
    @Bean
    public RequestInterceptor requestInterceptor() {
        return new RequestInterceptor() {
            @Override
            public void apply(RequestTemplate template) { 
                ServletRequestAttributes attributes = (ServletRequestAttributes) RequestContextHolder
                        .getRequestAttributes();
                HttpServletRequest request = attributes.getRequest();  //当前服务token
 
                template.header("Authorization","Bearer " + request.getSession().getId()); //template 接收请求方token
            } 
        };
    }
}

2.接收方

请求启动类

@SpringBootApplication
@EnableEurekaClient
public class HelloServiceApplication {    
    public static void main(String[] args) {
        new SpringApplicationBuilder(HelloServiceApplication.class).web(true).run(args);
    }    
}

请求Controller

@Controller
@RequestMapping("/hello")
public class HelloController {    
    @RequestMapping(value="/hello",method = RequestMethod.GET)
    @ResponseBody
    public List hello(@RequestParam Map queryParam) {
        return null;  
    }
}