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SpringCloud集成Nacos的使用小结

作者:以梦为马、不负韶华

这篇文章主要介绍了SpringCloud集成Nacos的使用小结,文中通过示例代码介绍的非常详细,对大家的学习或者工作具有一定的参考学习价值,需要的朋友们下面随着小编来一起学习学习吧

Nacos 注册中心

Nacos 是 Dubbo 生态系统中重要的注册中心实现,其中 dubbo-registry-nacos 则是 Dubbo 融合 Nacos 注册中心的实现。

Nacos服务安装与启动

安装地址: https://github.com/alibaba/nacos/releases

#*************** Spring Boot Related Configurations ***************#
### Default web context path:
server.servlet.contextPath=/nacos
### Default web server port:
server.port=8848

#*************** Network Related Configurations ***************#
### If prefer hostname over ip for Nacos server addresses in cluster.conf:
# nacos.inetutils.prefer-hostname-over-ip=false

### Specify local server's IP:
# nacos.inetutils.ip-address=



#*************** Config Module Related Configurations ***************#
### If user MySQL as datasource:
spring.datasource.platform=mysql

### Count of DB:
db.num=1

### Connect URL of DB:
db.url.0=jdbc:mysql://127.0.0.1:3306/nacos?serverTimezone=UTC&characterEncoding=utf8
db.user=root
db.password=123456


#*************** Naming Module Related Configurations ***************#
### Data dispatch task execution period in milliseconds:
# nacos.naming.distro.taskDispatchPeriod=200

### Data count of batch sync task:
# nacos.naming.distro.batchSyncKeyCount=1000

### Retry delay in milliseconds if sync task failed:
# nacos.naming.distro.syncRetryDelay=5000

初始化数据库,脚本位于conf目录下nacos-mysql.sql

启动nacos服务,在cmd中执行bin目录下startup.cmd:

D:\>cd nacos/bin

D:\nacos\bin>startup.cmd

     ,--.
    ,--.'|
  ,--,: : |                      Nacos 1.2.1
,`--.'`| ' :            ,---.        Running in stand alone mode, All function modules
|  : : | |           '  ,'\  .--.--.  Port: 8848
:  |  \ | : ,--.--.   ,---. /  /  | / /  '  Pid: 20700
|  : ' '; | /    \  /   \.  ; ,. :| : /`./  Console: http://10.118.37.75:8848/nacos/index.html
'  ' ;.  ;.--. .-. | /  / ''  | |: :| : ;_
|  | | \  | \__\/: . ..  ' / '  | .; : \ \  `.   https://nacos.io
'  : | ; .' ," .--.; |'  ; :__|  :  | `----.  \
|  | '`--' / / ,. |'  | '.'|\  \ / / /`--' /
'  : |   ; :  .'  \  :  : `----' '--'.   /
;  |.'   | ,   .-./\  \ /      `--'---'
'---'    `--`---'   `----'

2020-05-07 16:09:06,639 INFO Bean 'org.springframework.security.config.annotation.configuration.ObjectPostProcessorConfiguration' of type [org.springframework.security.config.annotation.configuration.ObjectPostProcessorConfiguration$$EnhancerBySpringCGLIB$$d2a494f3] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying)

2020-05-07 16:09:06,713 INFO Bean 'objectPostProcessor' of type [org.springframework.security.config.annotation.configuration.AutowireBeanFactoryObjectPostProcessor] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying)

2020-05-07 16:09:06,715 INFO Bean 'org.springframework.security.access.expression.method.DefaultMethodSecurityExpressionHandler@2de56eb2' of type [org.springframework.security.access.expression.method.DefaultMethodSecurityExpressionHandler] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying)

2020-05-07 16:09:06,717 INFO Bean 'org.springframework.security.config.annotation.method.configuration.GlobalMethodSecurityConfiguration' of type [org.springframework.security.config.annotation.method.configuration.GlobalMethodSecurityConfiguration$$EnhancerBySpringCGLIB$$f77937a5] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying)

2020-05-07 16:09:06,721 INFO Bean 'methodSecurityMetadataSource' of type [org.springframework.security.access.method.DelegatingMethodSecurityMetadataSource] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying)

2020-05-07 16:09:07,176 INFO Tomcat initialized with port(s): 8848 (http)

2020-05-07 16:09:07,280 INFO Root WebApplicationContext: initialization completed in 2308 ms

2020-05-07 16:09:16,998 INFO Initializing ExecutorService 'applicationTaskExecutor'

2020-05-07 16:09:17,138 INFO Adding welcome page: class path resource [static/index.html]

2020-05-07 16:09:17,390 INFO Creating filter chain: Ant [pattern='/**'], []

2020-05-07 16:09:17,418 INFO Creating filter chain: any request, [org.springframework.security.web.context.request.async.WebAsyncManagerIntegrationFilter@163d04ff, org.springframework.security.web.context.SecurityContextPersistenceFilter@1698fc68, org.springframework.security.web.header.HeaderWriterFilter@56a4479a, org.springframework.security.web.csrf.CsrfFilter@565b064f, org.springframework.security.web.authentication.logout.LogoutFilter@53d1b9b3, org.springframework.security.web.savedrequest.RequestCacheAwareFilter@207b8649, org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter@57eda880, org.springframework.security.web.authentication.AnonymousAuthenticationFilter@7c209437, org.springframework.security.web.session.SessionManagementFilter@20a8a64e, org.springframework.security.web.access.ExceptionTranslationFilter@73163d48]

2020-05-07 16:09:17,502 INFO Exposing 2 endpoint(s) beneath base path '/actuator'

2020-05-07 16:09:17,528 INFO Initializing ExecutorService 'taskScheduler'

2020-05-07 16:09:17,639 INFO Tomcat started on port(s): 8848 (http) with context path '/nacos'

2020-05-07 16:09:17,645 INFO Nacos logs files: D:\nacos\logs\

2020-05-07 16:09:17,646 INFO Nacos conf files: D:\nacos\conf\

2020-05-07 16:09:17,646 INFO Nacos data files: D:\nacos\data\

2020-05-07 16:09:17,646 INFO Nacos started successfully in stand alone mode.

2020-05-07 16:09:17,851 INFO Initializing Servlet 'dispatcherServlet'

2020-05-07 16:09:17,858 INFO Completed initialization in 6 ms

Nacos平台

访问路径:http://localhost:8848/nacos

在这里插入图片描述

可以新建多个环境,项目中通过命名空间映射相应的环境配置

spring:
 profiles:
  active: dev
 datasource:
  driverClassName: com.mysql.cj.jdbc.Driver
  jdbc-url: jdbc:mysql://106.13.181.6:3306/demo
  username: root
  password: 123456

新增配置后发布

在这里插入图片描述

SpringCloud项目配置

依赖配置

<dependency>
   <groupId>com.alibaba.cloud</groupId>
   <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
   <version>2.1.1.RELEASE</version>
 </dependency>
 <dependency>
   <groupId>com.alibaba.cloud</groupId>
   <artifactId>spring-cloud-starter-alibaba-nacos-config</artifactId>
   <version>2.1.1.RELEASE</version>
 </dependency>

通过bootstrap.yml配置启动,bootstrap-dev.yml配置文件如下:

spring:
 application:
  name: demo
 cloud:
  nacos:
   server-addr: 127.0.0.1:8848
   config:
    namespace: 9c6b8156-d045-463d-8fe6-4658ce78d0cc
    file-extension: yml

启动类配置

package com.example.demo;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;

@SpringBootApplication
@EnableDiscoveryClient
public class DemoApplication {

  public static void main(String[] args) {
    SpringApplication.run(DemoApplication.class, args);
  }
}

数据源配置

package com.example.demo.config;
import com.baomidou.mybatisplus.extension.plugins.PaginationInterceptor;
import com.baomidou.mybatisplus.extension.spring.MybatisSqlSessionFactoryBean;
import org.apache.ibatis.plugin.Interceptor;
import org.mybatis.spring.mapper.MapperScannerConfigurer;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.boot.jdbc.DataSourceBuilder;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.io.support.PathMatchingResourcePatternResolver;
import javax.sql.DataSource;

@Configuration
public class SqlSessionConfig {

  private Logger logger = LoggerFactory.getLogger(SqlSessionConfig.class);

  @Bean("datasource")
  @ConfigurationProperties(prefix="spring.datasource")
  public DataSource masterDataSource() {
    return DataSourceBuilder.create().build();
  }

  @Bean("mySqlSessionFactoryBean")
  public MybatisSqlSessionFactoryBean createSqlSessionFactory(@Qualifier("datasource") DataSource dataSource,
                                @Qualifier("paginationInterceptor") PaginationInterceptor paginationInterceptor) {
    // MybatisSqlSessionFactory
    MybatisSqlSessionFactoryBean sqlSessionFactoryBean = null;
    try {
      // 实例SessionFactory
      sqlSessionFactoryBean = new MybatisSqlSessionFactoryBean();
      // 配置数据源
      sqlSessionFactoryBean.setDataSource(dataSource);
      // 设置 MyBatis-Plus 分页插件
      Interceptor [] plugins = {paginationInterceptor};
      sqlSessionFactoryBean.setPlugins(plugins);
      // 加载MyBatis配置文件
      PathMatchingResourcePatternResolver resourcePatternResolver = new PathMatchingResourcePatternResolver();
      sqlSessionFactoryBean.setMapperLocations(resourcePatternResolver.getResources("classpath*:mapper/*.xml"));
    } catch (Exception e) {
      logger.error("创建SqlSession连接工厂错误:{}", e.getMessage());
    }
    return sqlSessionFactoryBean;
  }

  @Bean
  public MapperScannerConfigurer myGetMapperScannerConfigurer() {
    MapperScannerConfigurer myMapperScannerConfigurer = new MapperScannerConfigurer();
    myMapperScannerConfigurer.setBasePackage("com.example.demo.mapper");
    myMapperScannerConfigurer.setSqlSessionFactoryBeanName("mySqlSessionFactoryBean");
    return myMapperScannerConfigurer;
  }
}

controller

package com.example.demo.controller;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.example.demo.bean.UserDTO;
import com.example.demo.constants.SexEnum;
import com.example.demo.entity.User;
import com.example.demo.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;
import java.time.LocalDateTime;
import java.util.List;

@RestController
@RequestMapping(value = "/demo")
public class UserController {

  @Autowired
  private UserService userService;

  @RequestMapping(value = "/create", method = RequestMethod.POST)
  public String create(@RequestBody UserDTO userDTO){
    User user = new User();
    user.setName(userDTO.getName());
    user.setPhone(userDTO.getPhone());
    user.setCreateTime(LocalDateTime.now());
    user.setEnable(true);
    user.setVersion(1L);
    user.setSex(SexEnum.getSexEnum(userDTO.getSex()));
    userService.insert(user);
    return "ok";
  }
}

启动项目

2020-05-08 15:37:26.384 INFO 12544 --- [      main] trationDelegate$BeanPostProcessorChecker : Bean 'org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration' of type [org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration$$EnhancerBySpringCGLIB$$9ea5255e] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying)

 .  ____     _      __ _ _
 /\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
 \\/ ___)| |_)| | | | | || (_| | ) ) ) )
 ' |____| .__|_| |_|_| |_\__, | / / / /
 =========|_|==============|___/=/_/_/_/
 :: Spring Boot ::    (v2.2.6.RELEASE)

2020-05-08 15:37:26.601 INFO 12544 --- [      main] c.a.c.n.c.NacosPropertySourceBuilder   : Loading nacos data, dataId: 'demo', group: 'DEFAULT_GROUP', data: spring:
 profiles:
  active: dev
 datasource:
  driverClassName: com.mysql.cj.jdbc.Driver
  jdbc-url: jdbc:mysql://106.13.181.6:3306/demo
  username: root
  password: 123456
2020-05-08 15:37:26.608 WARN 12544 --- [      main] c.a.c.n.c.NacosPropertySourceBuilder   : Ignore the empty nacos configuration and get it based on dataId[demo.yml] & group[DEFAULT_GROUP]
2020-05-08 15:37:26.612 WARN 12544 --- [      main] c.a.c.n.c.NacosPropertySourceBuilder   : Ignore the empty nacos configuration and get it based on dataId[demo-dev.yml] & group[DEFAULT_GROUP]
2020-05-08 15:37:26.612 INFO 12544 --- [      main] b.c.PropertySourceBootstrapConfiguration : Located property source: CompositePropertySource {name='NACOS', propertySources=[NacosPropertySource {name='demo-dev.yml'}, NacosPropertySource {name='demo.yml'}, NacosPropertySource {name='demo'}]}
2020-05-08 15:37:26.616 INFO 12544 --- [      main] com.example.demo.DemoApplication     : The following profiles are active: dev
2020-05-08 15:37:26.984 WARN 12544 --- [      main] o.m.s.mapper.ClassPathMapperScanner   : Skipping MapperFactoryBean with name 'userMapper' and 'com.example.demo.mapper.UserMapper' mapperInterface. Bean already defined with the same name!
2020-05-08 15:37:26.984 WARN 12544 --- [      main] o.m.s.mapper.ClassPathMapperScanner   : No MyBatis mapper was found in '[com.example.demo.mapper]' package. Please check your configuration.
2020-05-08 15:37:26.985 INFO 12544 --- [      main] o.s.c.a.ConfigurationClassPostProcessor : Cannot enhance @Configuration bean definition 'sqlSessionConfig' since its singleton instance has been created too early. The typical cause is a non-static @Bean method with a BeanDefinitionRegistryPostProcessor return type: Consider declaring such methods as 'static'.
2020-05-08 15:37:27.004 INFO 12544 --- [      main] o.s.cloud.context.scope.GenericScope   : BeanFactory id=118dc0e1-e30f-3c3e-b857-cf20ba8b4123
2020-05-08 15:37:27.131 INFO 12544 --- [      main] trationDelegate$BeanPostProcessorChecker : Bean 'org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration' of type [org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration$$EnhancerBySpringCGLIB$$9ea5255e] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying)
2020-05-08 15:37:27.302 INFO 12544 --- [      main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat initialized with port(s): 8080 (http)
2020-05-08 15:37:27.309 INFO 12544 --- [      main] o.a.coyote.http11.Http11NioProtocol   : Initializing ProtocolHandler ["http-nio-8080"]
2020-05-08 15:37:27.309 INFO 12544 --- [      main] o.apache.catalina.core.StandardService  : Starting service [Tomcat]
2020-05-08 15:37:27.309 INFO 12544 --- [      main] org.apache.catalina.core.StandardEngine : Starting Servlet engine: [Apache Tomcat/9.0.33]
2020-05-08 15:37:27.434 INFO 12544 --- [      main] o.a.c.c.C.[Tomcat].[localhost].[/]    : Initializing Spring embedded WebApplicationContext
2020-05-08 15:37:27.435 INFO 12544 --- [      main] o.s.web.context.ContextLoader      : Root WebApplicationContext: initialization completed in 810 ms
 _ _  |_ _ _|_. ___ _ |  _ 
| | |\/|_)(_| | |_\ |_)||_|_\ 
   /        |     
            3.3.1 
2020-05-08 15:37:27.822 WARN 12544 --- [      main] c.n.c.sources.URLConfigurationSource   : No URLs will be polled as dynamic configuration sources.
2020-05-08 15:37:27.823 INFO 12544 --- [      main] c.n.c.sources.URLConfigurationSource   : To enable URLs as dynamic configuration sources, define System property archaius.configurationSource.additionalUrls or make config.properties available on classpath.
2020-05-08 15:37:27.825 WARN 12544 --- [      main] c.n.c.sources.URLConfigurationSource   : No URLs will be polled as dynamic configuration sources.
2020-05-08 15:37:27.826 INFO 12544 --- [      main] c.n.c.sources.URLConfigurationSource   : To enable URLs as dynamic configuration sources, define System property archaius.configurationSource.additionalUrls or make config.properties available on classpath.
2020-05-08 15:37:27.951 INFO 12544 --- [      main] o.s.s.concurrent.ThreadPoolTaskExecutor : Initializing ExecutorService 'applicationTaskExecutor'
2020-05-08 15:37:28.151 INFO 12544 --- [      main] o.s.s.c.ThreadPoolTaskScheduler     : Initializing ExecutorService
2020-05-08 15:37:28.391 INFO 12544 --- [      main] o.a.coyote.http11.Http11NioProtocol   : Starting ProtocolHandler ["http-nio-8080"]
2020-05-08 15:37:28.409 INFO 12544 --- [      main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat started on port(s): 8080 (http) with context path ''
2020-05-08 15:37:28.549 INFO 12544 --- [      main] c.a.c.n.registry.NacosServiceRegistry  : nacos registry, DEFAULT_GROUP demo 10.118.37.75:8080 register finished
2020-05-08 15:37:28.618 INFO 12544 --- [      main] com.example.demo.DemoApplication     : Started DemoApplication in 2.941 seconds (JVM running for 3.791)
2020-05-08 15:37:33.589 INFO 12544 --- [nio-8080-exec-2] o.a.c.c.C.[Tomcat].[localhost].[/]    : Initializing Spring DispatcherServlet 'dispatcherServlet'
2020-05-08 15:37:33.590 INFO 12544 --- [nio-8080-exec-2] o.s.web.servlet.DispatcherServlet    : Initializing Servlet 'dispatcherServlet'
2020-05-08 15:37:33.597 INFO 12544 --- [nio-8080-exec-2] o.s.web.servlet.DispatcherServlet    : Completed initialization in 5 ms
2020-05-08 15:37:33.663 INFO 12544 --- [nio-8080-exec-2] com.example.demo.config.LogAspect    : 

测试

2020-05-08 16:05:13.994 INFO 12544 --- [nio-8080-exec-4] com.example.demo.config.LogAspect    : 
 请求信息:
【请求地址】:/demo/create
【请求头】:content-type = application/json, user-agent = PostmanRuntime/7.24.0, accept = */*, postman-token = fc010815-8e7b-4e11-9fed-3d061f388faf, host = localhost:8080, accept-encoding = gzip, deflate, br, connection = keep-alive, content-length = 49
【请求方法】:String com.example.demo.controller.UserController.create(UserDTO)
【请求参数】:[UserDTO(id=null, name=zhangsan, phone=17751033130, sex=1)]
2020-05-08 16:05:14.004 WARN 12544 --- [nio-8080-exec-4] com.zaxxer.hikari.pool.PoolBase     : HikariPool-1 - Failed to validate connection com.mysql.cj.jdbc.ConnectionImpl@2bacd020 (No operations allowed after connection closed.). Possibly consider using a shorter maxLifetime value.
2020-05-08 16:05:14.008 WARN 12544 --- [nio-8080-exec-4] com.zaxxer.hikari.pool.PoolBase     : HikariPool-1 - Failed to validate connection com.mysql.cj.jdbc.ConnectionImpl@5283f4ad (No operations allowed after connection closed.). Possibly consider using a shorter maxLifetime value.
2020-05-08 16:05:14.009 WARN 12544 --- [nio-8080-exec-4] com.zaxxer.hikari.pool.PoolBase     : HikariPool-1 - Failed to validate connection com.mysql.cj.jdbc.ConnectionImpl@1fe3130d (No operations allowed after connection closed.). Possibly consider using a shorter maxLifetime value.
2020-05-08 16:05:14.010 WARN 12544 --- [nio-8080-exec-4] com.zaxxer.hikari.pool.PoolBase     : HikariPool-1 - Failed to validate connection com.mysql.cj.jdbc.ConnectionImpl@11977567 (No operations allowed after connection closed.). Possibly consider using a shorter maxLifetime value.
2020-05-08 16:05:14.011 WARN 12544 --- [nio-8080-exec-4] com.zaxxer.hikari.pool.PoolBase     : HikariPool-1 - Failed to validate connection com.mysql.cj.jdbc.ConnectionImpl@641256c2 (No operations allowed after connection closed.). Possibly consider using a shorter maxLifetime value.
2020-05-08 16:05:14.013 WARN 12544 --- [nio-8080-exec-4] com.zaxxer.hikari.pool.PoolBase     : HikariPool-1 - Failed to validate connection com.mysql.cj.jdbc.ConnectionImpl@29f9f071 (No operations allowed after connection closed.). Possibly consider using a shorter maxLifetime value.
2020-05-08 16:05:14.015 WARN 12544 --- [nio-8080-exec-4] com.zaxxer.hikari.pool.PoolBase     : HikariPool-1 - Failed to validate connection com.mysql.cj.jdbc.ConnectionImpl@2e05f538 (No operations allowed after connection closed.). Possibly consider using a shorter maxLifetime value.
2020-05-08 16:05:14.016 WARN 12544 --- [nio-8080-exec-4] com.zaxxer.hikari.pool.PoolBase     : HikariPool-1 - Failed to validate connection com.mysql.cj.jdbc.ConnectionImpl@41391d2 (No operations allowed after connection closed.). Possibly consider using a shorter maxLifetime value.
2020-05-08 16:05:14.017 WARN 12544 --- [nio-8080-exec-4] com.zaxxer.hikari.pool.PoolBase     : HikariPool-1 - Failed to validate connection com.mysql.cj.jdbc.ConnectionImpl@72c163d4 (No operations allowed after connection closed.). Possibly consider using a shorter maxLifetime value.
2020-05-08 16:05:14.019 WARN 12544 --- [nio-8080-exec-4] com.zaxxer.hikari.pool.PoolBase     : HikariPool-1 - Failed to validate connection com.mysql.cj.jdbc.ConnectionImpl@145d7f85 (No operations allowed after connection closed.). Possibly consider using a shorter maxLifetime value.
2020-05-08 16:05:14.545 DEBUG 12544 --- [nio-8080-exec-4] c.example.demo.mapper.UserMapper.insert : ==> Preparing: INSERT INTO user ( name, sex, phone, create_time, enable, version ) VALUES ( ?, ?, ?, ?, ?, ? ) 
2020-05-08 16:05:14.548 DEBUG 12544 --- [nio-8080-exec-4] c.example.demo.mapper.UserMapper.insert : ==> Parameters: zhangsan(String), MAN(String), 17751033130(String), 2020-05-08T16:05:13.995(LocalDateTime), true(Boolean), 1(Long)
2020-05-08 16:05:14.686 DEBUG 12544 --- [nio-8080-exec-4] c.example.demo.mapper.UserMapper.insert : <==  Updates: 1
2020-05-08 16:05:14.697 INFO 12544 --- [nio-8080-exec-4] com.example.demo.config.LogAspect    : 
 执行结果:
【响应结果】:"ok"
【执行耗时】:701毫秒

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