Spring-Clould-Alibaba-Nacos
概述:
- Spring Cloud Alibaba 致力于提供微服务开发的一站式解决方案。此项目包含开发分布式应用服务的必需组件，
- 方便开发者通过 Spring Cloud 编程模型轻松使用这些组件来开发分布式应用服务。
- 依托 Spring Cloud Alibaba，您只需要添加一些注解和少量配置，
- 就可以将 Spring Cloud 应用接入阿里分布式应用解决方案，通过阿里中间件来迅速搭建分布式应用系统。
版本介绍:
Nacos概述
- 什么是Nacos
- Nacos 致力于帮助您发现、配置和管理微服务。Nacos 提供了一组简单易用的特性集，
- 帮助您快速实现动态服务发现、服务配置、服务元数据及流量管理。
- 搭建NacosServer
1.下载 官网地址
2.网盘地址：百度网盘 提取码：rest
3.启动
双击startup.cmd
浏览器输入http://localhost:8848/nacos/
用户名和密码都是 nacos
服务注册与发现
1. 创建父工程,在父工程当中导入依赖
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.2.3.RELEASE</version>
</parent>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-dependencies</artifactId>
<version>Hoxton.SR1</version>
<type>pom</type>
<scope>import</scope>
</dependency>
<dependency>
<groupId>com.alibaba.cloud</groupId>
<artifactId>spring-cloud-alibaba-dependencies</artifactId>
<version>2.1.1.RELEASE</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
- 创建两个子工程user与goods工程
- 导入依赖
- 在启动类添加@EnableDiscoveryClient注解
- 创建util包和ResponseResult类用于返回信息
public class ResponseResult extends HashMap {
public static String SUCCESS_CODE = "200";
public static String ERROR_CODE = "500";
public static String DATA_KEY = "data";
public static String MSG_KEY = "msg";
private ResponseResult() {
}
public ResponseResult set(String key, Object object) {
super.put(key, object);
return this;
}
private static ResponseResult newResponseResult() {
return new ResponseResult();
}
public static ResponseResult success() {
return ResponseResult.newResponseResult()
.set("code", ResponseResult.SUCCESS_CODE)
.set(ResponseResult.MSG_KEY, "操作成功");
}
public static ResponseResult success(String msg) {
return ResponseResult.newResponseResult()
.set("code", ResponseResult.SUCCESS_CODE)
.set(ResponseResult.MSG_KEY, msg);
}
public static ResponseResult success(String msg, Object object) {
return ResponseResult.newResponseResult()
.set("code", ResponseResult.SUCCESS_CODE)
.set(ResponseResult.MSG_KEY, msg)
.set(ResponseResult.DATA_KEY, object);
}
public ResponseResult data(Object obj) {
return this.set("data", obj);
}
public static ResponseResult error() {
return ResponseResult.newResponseResult()
.set(ResponseResult.MSG_KEY, "操作失败")
.set("code", ResponseResult.ERROR_CODE);
}
public static ResponseResult error(String msg) {
return ResponseResult.newResponseResult()
.set(ResponseResult.MSG_KEY, msg)
.set("code", ResponseResult.ERROR_CODE);
}
public static ResponseResult error(String msg, Object object) {
return ResponseResult.newResponseResult()
.set(ResponseResult.MSG_KEY, msg)
.set(ResponseResult.DATA_KEY, object)
.set("code", ResponseResult.ERROR_CODE);
}
}
- 创建controller
@RestController
public class goodsController {
@RequestMapping("/getGoods")
public ResponseResult getGoods(){
return ResponseResult.success("操作成功");
}
}
- 在配置文件添加添加配置
spring:
application:
name: goods-provide
cloud:
nacos:
discovery:
server-addr: localhost:8848 #nacos服务的地址 不要加http
server:
port: 8001
- 启动运行，在nacos服务端查看
- 使用相同方式 把user注册到nacos上
- 6.在user工程中通过服务发现调用goods工程
在user的启动类中添加RestTemplate
@Bean
public RestTemplate restTemplate(){
return new RestTemplate();
}
在controller中添加
@Autowired
public RestTemplate restTemplate;
@Autowired
private DiscoveryClient discoveryClient;
@RequestMapping("/getGoods")
public ResponseResult getGoods() {
List<ServiceInstance> instances = discoveryClient.getInstances("goods-provide");
System.out.println(instances);
ServiceInstance serviceInstance = instances.get(0);
String url = serviceInstance.getUri()+"/getGoods".toString();
return ResponseResult.success("操作成功",
restTemplate.getForObject(url,Object.class));
}
启动访问http://localhost:8000/getGoods
joker_dj
