ribbon服务消费者(入门)

1. 创建SpringBoot项目,添加eureka discovery client和web的jar包:

​ eureka discovery client 中已经包含 ribbon 的依赖

2. 在pom.xml中添加实际项目的common工具项目依赖:

3.在yml文件中配置ribbon的相关信息:

4. 创建 RestTemplate 实例,并交给Spring容器管理:

4. 创建RibbonController类(根据需求编写此方法,这里是模拟数据):

package com.tedu.sp06.consoller;

import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;

import com.tedu.sp01.pojo.Item;
import com.tedu.sp01.pojo.Order;
import com.tedu.sp01.pojo.User;
import com.tedu.web.util.JsonResult;

@RestController
public class RibbonController {
	@Autowired
	private RestTemplate rt;
	
	@GetMapping("/item-service/{orderId}")
	public JsonResult<List<Item>> getItems(@PathVariable String orderId) {
	    //向指定微服务地址发送 get 请求，并获得该服务的返回结果 
	    //{1} 占位符，用 orderId 填充
		return rt.getForObject("http://localhost:8001/{1}", JsonResult.class, orderId);
	}

	@PostMapping("/item-service/decreaseNumber")
	public JsonResult decreaseNumber(@RequestBody List<Item> items) {
	    //发送 post 请求
		return rt.postForObject("http://localhost:8001/decreaseNumber", items, JsonResult.class);
	}

	/////////////////////////////////////////
	
	@GetMapping("/user-service/{userId}")
	public JsonResult<User> getUser(@PathVariable Integer userId) {
		return rt.getForObject("http://localhost:8101/{1}", JsonResult.class, userId);
	}

	@GetMapping("/user-service/{userId}/score") 
	public JsonResult addScore(
			@PathVariable Integer userId, Integer score) {
		return rt.getForObject("http://localhost:8101/{1}/score?score={2}", JsonResult.class, userId, score);
	}
	
	/////////////////////////////////////////
	
	@GetMapping("/order-service/{orderId}")
	public JsonResult<Order> getOrder(@PathVariable String orderId) {
		return rt.getForObject("http://localhost:8201/{1}", JsonResult.class, orderId);
	}

	@GetMapping("/order-service")
	public JsonResult addOrder() {
		return rt.getForObject("http://localhost:8201/", JsonResult.class);
	}
}

6. 启动测试: