

三种方式访问服务
- URL 写死,用new RestTemplate()访问url来获取消息。(在服务有多个节点,地址多个的情况下,该方法不适用)
- 使用loadBlancerClient获取到url,然后使用new RestTemplate()访问url来获取消息。(太繁琐了)
- 利用@LoadBlanced 注解restTemplate,然后restTemplate 就可以使用应用名称来访问。
spring:
application:
name: product
datasource:
driver-class-name: com.mysql.jdbc.Driver
username: root
password: 123456
url: jdbc:mysql://127.0.0.1:3306/SpringCloud_Sell?characterEncoding=utf-8&useSSL=false
jpa:
show-sql: true
eureka:
client:
service-url:
defaultZone: http://localhost:8761/eureka/
package com.imooc.product.controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;
@RestController
public class ServerController {
@GetMapping("/msg")
public String msg() {
return "this is product' msg";
}
}
package com.imooc.order.controller;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;
@RestController
@Slf4j
public class ClientController {
@Autowired
private RestTemplate restTemplate;
@GetMapping("/getProductMsg")
public String getProductMsg() {
String response = restTemplate.getForObject("http://PRODUCT/msg", String.class);
log.info("response={}", response);
return response;
}
}
package com.imooc.order.config;
import org.springframework.cloud.client.loadbalancer.LoadBalanced;
import org.springframework.context.annotation.Bean;
import org.springframework.stereotype.Component;
import org.springframework.web.client.RestTemplate;
@Component
public class RestTemplateConfig {
@Bean
@LoadBalanced
public RestTemplate restTemplate() {
return new RestTemplate();
}
}