idea 搭建springcloud+springcloud alibaba项目（maven）

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## idea 搭建springcloud+springcloud alibaba项目 ##

版本：  
jdk：1.8  
springcloud alibaba：2.2.1  
springboot：2.2.5  
springcloud：Hoxton.SR6  
个人总结：  
（1）首先是服务注册中心以及配置中心（Nacos）  
（2）服务注册  
（3）openfeign组件实现服务调用（集成了Ribbon，故负载均衡）  
（4）gateway网关（实现了统一调用）：路由转发，过滤  
（5）sentinel流量哨兵（监控整个微服务，从流量控制，熔断降级，系统负载等多个维度保护服务）  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0hlbGxvd29ybGRfcGFuZw_size_16_color_FFFFFF_t_70_pic_center]  
1.新建无骨架的maven项目作为父项目  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0hlbGxvd29ybGRfcGFuZw_size_16_color_FFFFFF_t_70_pic_center 1]  
删掉src文件目录并引入依赖：

<parent>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-parent</artifactId>
            <version>2.2.5.RELEASE</version>
        </parent>
    
        <properties>
            <java.version>1.8</java.version>
            <spring.cloud.alibaba.version>2.2.1.RELEASE</spring.cloud.alibaba.version>
            <spring.cloud.version>Hoxton.SR6</spring.cloud.version>
        </properties>
        
        <dependencyManagement>
            <dependencies>
                
                <dependency>
                    <groupId>com.alibaba.cloud</groupId>
                    <artifactId>spring-cloud-alibaba-dependencies</artifactId>
                    <version>${spring.cloud.alibaba.version}</version>
                    <type>pom</type>
                    <scope>import</scope>
                </dependency>
                
                <dependency>
                    <groupId>org.springframework.cloud</groupId>
                    <artifactId>spring-cloud-dependencies</artifactId>
                    <version>${spring.cloud.version}</version>
                    <type>pom</type>
                    <scope>import</scope>
                </dependency>
            </dependencies>
        </dependencyManagement>

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0hlbGxvd29ybGRfcGFuZw_size_16_color_FFFFFF_t_70_pic_center 2]  
然后新建一个Module：commons，以后主要是放置公共实体类以及公共工具类以及公共依赖，所以不需要启动类，以及test  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0hlbGxvd29ybGRfcGFuZw_size_16_color_FFFFFF_t_70_pic_center 3]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0hlbGxvd29ybGRfcGFuZw_size_16_color_FFFFFF_t_70_pic_center 4]  
然后根据上面的方式在随意建两个module，这里一个user，一个product  
然后公共类引入Nacos注册发现依赖 以及 springboot的web依赖，两个新建的module引入commons

<dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-web</artifactId>
            </dependency>
            
            <dependency>
                <groupId>com.alibaba.cloud</groupId>
                <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
            </dependency>

创建resource文件夹以及application.properties文件并写入配置

server.port=6666
    spring.application.name=clouduser
    
    spring.cloud.nacos.server-addr=localhost:8848
    spring.cloud.nacos.discovery.server-addr=${spring.cloud.nacos.server-addr}
    management.endpoints.web.exposure.include=*

<dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-starter-openfeign</artifactId>
            </dependency>

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0hlbGxvd29ybGRfcGFuZw_size_16_color_FFFFFF_t_70_pic_center 10]  
入口类加入@EnableFeignClients注解  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0hlbGxvd29ybGRfcGFuZw_size_16_color_FFFFFF_t_70_pic_center 11]  
product服务写个接口：  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0hlbGxvd29ybGRfcGFuZw_size_16_color_FFFFFF_t_70_pic_center 12]  
user服务添加新建个clients包，用来存放服务调用接口  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0hlbGxvd29ybGRfcGFuZw_size_16_color_FFFFFF_t_70_pic_center 13]  
然后写user服务接口调用product服务的接口：  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0hlbGxvd29ybGRfcGFuZw_size_16_color_FFFFFF_t_70_pic_center 14]  
运行：Error:(3,43) java: 程序包org.springframework.cloud.openfeign不存在（报错的话clean/install一下commons服务）  
然后复制一个product服务测试负载均衡（这个方法上篇讲过https://blog.csdn.net/Helloworld\_pang/article/details/108281893）  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0hlbGxvd29ybGRfcGFuZw_size_16_color_FFFFFF_t_70_pic_center 15]  
访问：  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0hlbGxvd29ybGRfcGFuZw_size_16_color_FFFFFF_t_70_pic_center 16]  
刷新：  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0hlbGxvd29ybGRfcGFuZw_size_16_color_FFFFFF_t_70_pic_center 17]实现负载均衡

**接下来先实现流量卫兵的监控**  
公共依赖引入依赖：

<dependency>
                <groupId>com.alibaba.cloud</groupId>
                <artifactId>spring-cloud-starter-alibaba-sentinel</artifactId>
            </dependency>

然后配置user，product服务的配置文件  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0hlbGxvd29ybGRfcGFuZw_size_16_color_FFFFFF_t_70_pic_center 18]

spring.cloud.sentinel.enabled=true
    spring.cloud.sentinel.transport.dashboard=localhost:xxxx  //这个xxxx是自己的端口号
    spring.cloud.sentinel.transport.port=8719

先看下sentinel，暂时没有对应的服务  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0hlbGxvd29ybGRfcGFuZw_size_16_color_FFFFFF_t_70_pic_center 19]  
然后运行一下各自的接口，在看sentinel就有了（这里application配置文件没有配置**spring.cloud.sentinel.eager=true**  
（这个就是代表立即加在到sentinel就不需要访问一下对应的接口才能检测到））  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0hlbGxvd29ybGRfcGFuZw_size_16_color_FFFFFF_t_70_pic_center 20]  
哨兵监控完成  
**然后就是管理配置文件（统一配置管理中心）：**  
commons引入依赖

<dependency>
                <groupId>com.alibaba.cloud</groupId>
                <artifactId>spring-cloud-starter-alibaba-nacos-config</artifactId>
            </dependency>

**然后nacos新建一个生产命名空间：**  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0hlbGxvd29ybGRfcGFuZw_size_16_color_FFFFFF_t_70_pic_center 21]  
然后去生产环境中配置：  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0hlbGxvd29ybGRfcGFuZw_size_16_color_FFFFFF_t_70_pic_center 22]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0hlbGxvd29ybGRfcGFuZw_size_16_color_FFFFFF_t_70_pic_center 23]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0hlbGxvd29ybGRfcGFuZw_size_16_color_FFFFFF_t_70_pic_center 24]  
***然后修改user服务的properties文件为bootstrap***

spring.cloud.nacos.server-addr=localhost:8848
    spring.cloud.nacos.discovery.server-addr=${spring.cloud.nacos.server-addr}
    #这是上面环境下的唯一标识
    spring.cloud.nacos.config.namespace=732f14fe-5d92-4d02-a276-340d9398b3d8
    #这是分组
    spring.cloud.nacos.config.group=CLOUDALI
    #这三个合起来就是data id
    spring.application.name=clouduser
    spring.profiles.active=prod
    spring.cloud.nacos.config.file-extension=properties

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0hlbGxvd29ybGRfcGFuZw_size_16_color_FFFFFF_t_70_pic_center 25]

运行  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0hlbGxvd29ybGRfcGFuZw_size_16_color_FFFFFF_t_70_pic_center 26]  
成功  
**接下来是gateway：**  
新建一个module（cloud-server）并引入依赖（mvc的web依赖跟gateway依赖冲突，所以gateway依赖自己单独引入）：

<dependency>
                <groupId>com.alibaba.cloud</groupId>
                <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
            </dependency>
            
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-starter-gateway</artifactId>
            </dependency>
            
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-starter-openfeign</artifactId>
            </dependency>
    
            
            <dependency>
                <groupId>com.alibaba.cloud</groupId>
                <artifactId>spring-cloud-starter-alibaba-sentinel</artifactId>
            </dependency>
    
            
            <dependency>
                <groupId>com.alibaba.cloud</groupId>
                <artifactId>spring-cloud-starter-alibaba-nacos-config</artifactId>
            </dependency>

server:
      port: 7666
    spring:
      application:
        name: gateway
      cloud:
        nacos:
          config:
            server-addr: localhost:8848
          discovery:
            service-name: ${spring.application.name}
        gateway:
          routes:
            - id: user-route  #指定唯一标识
              #          uri: http://localhost:6666/ #指定路由服务的地址
              uri: lb://clouduser   #服务名，实现负载均衡
              predicates:
                - Path=/user/** #指定路由规则
    
            - id: product-route  #指定唯一标识
              #          uri: http://localhost:6667/ #指定路由服务的地址
              uri: lb://cloudproduct   # lb：服务名，实现负载均衡
              predicates:
                - Path=/product/** #指定路由规则
          discovery:
            locator:
              enabled: true  #开启动态服务名动态获取路由地址
    
    management:
      endpoints:
        web:
          exposure:
            include: "*"   #暴露路由的规则端点  /actuator/gateway/routes

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0hlbGxvd29ybGRfcGFuZw_size_16_color_FFFFFF_t_70_pic_center 28]

然后新建启动类：  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0hlbGxvd29ybGRfcGFuZw_size_16_color_FFFFFF_t_70_pic_center 29]  
启动  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0hlbGxvd29ybGRfcGFuZw_size_16_color_FFFFFF_t_70_pic_center 30]  
访问：  
![在这里插入图片描述][20200904112015616.png_pic_center]  
处理格式异常：[https://blog.csdn.net/Helloworld\_pang/article/details/108400636][https_blog.csdn.net_Helloworld_pang_article_details_108400636]  
通过gateway访问商品服务：  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0hlbGxvd29ybGRfcGFuZw_size_16_color_FFFFFF_t_70_pic_center 31]  
刷新：  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0hlbGxvd29ybGRfcGFuZw_size_16_color_FFFFFF_t_70_pic_center 32]  
负载均衡  
通过gateway访问user服务，user服务调用的product服务  
![在这里插入图片描述][20200904112534395.png_pic_center]  
刷新：  
![在这里插入图片描述][20200904112553746.png_pic_center]  
成功  
最后，查看路由规则：  
这里配置了路由暴露规则端点：  
![在这里插入图片描述][20200904114155108.png_pic_center]  
引入依赖：  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0hlbGxvd29ybGRfcGFuZw_size_16_color_FFFFFF_t_70_pic_center 33]  
重启：访问：http://localhost:7666/actuator/gateway/routes  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0hlbGxvd29ybGRfcGFuZw_size_16_color_FFFFFF_t_70_pic_center 34]  
结束

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[https_blog.csdn.net_Helloworld_pang_article_details_108400636]: https://blog.csdn.net/Helloworld_pang/article/details/108400636
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