springcloud-Feign 声明式 REST 调用

• Feign 基础
• 将前面的例子用 Feign 改写，让其达到与 Ribbon + RestTemplate 相同的效果。

 

• 如果系统业务非常复杂，而你是一个新人，当你看到这行代码，恐怕很难一眼看出其用途是什么。
• 这个例子构造的 URL 非常简单，但如果你需要构造类似如下这么丑陋的 URL 时，比如：https://www.baidu.com/s?wd=asf&rsv_spt=1&rsv_iqid=0xa25bbeba000047fd&，恐怕就有心无力了。尽管 RestTemplate 支持使用占位符，从而让我们避免字符串拼接的尴尬境地，但构造这么复杂的 URL 依然是很麻烦的。更可怕的是，互联网时代需求变化非常之快，你的参数可能会从 10 个变成 12 个、15 个，再后来又精简成 13 个……维护这个 URL 真的是想想都累……

 

Feign 是 Netflix 开发的声明式、模板化的 HTTP 客户端，其灵感来自 Retrofit、JAXRS-2.0 以及 WebSocket。Feign 可帮助我们更加便捷、优雅地调用 HTTP API。

在 Spring Cloud 中，使用 Feign 非常简单——只需创建接口，并在接口上添加注解即可。

Feign 支持多种注解，例如 Feign 自带的注解或者 JAX-RS 注解等。Spring Cloud 对 Feign 进行了增强，使其支持 Spring MVC 注解，另外还整合了 Ribbon 和 Eureka，从而使得 Feign 的使用更加方便。

 

 pom.xml

添加

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

　　

 

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<?xml version="1.0" encoding="UTF-8"?> <project xmlns="http://maven.apache.org/POM/4.0.0"          xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"          xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">     <modelVersion>4.0.0</modelVersion>       <groupId>com.lzj1234</groupId>     <artifactId>microservice-consumer-movie-feign</artifactId>     <version>1.0-SNAPSHOT</version>     <parent>         <groupId>org.springframework.boot</groupId>         <artifactId>spring-boot-starter-parent</artifactId>         <version>2.0.7.RELEASE</version>         <relativePath/>     </parent>     <properties>         <java.version>1.8</java.version>         <!--        <maven.compiler.source>8</maven.compiler.source>-->         <!--        <maven.compiler.target>8</maven.compiler.target>-->     </properties>     <dependencies>         <!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-data-jpa -->         <dependency>             <groupId>org.springframework.boot</groupId>             <artifactId>spring-boot-starter-data-jpa</artifactId>         </dependency>           <!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-web -->         <dependency>             <groupId>org.springframework.boot</groupId>             <artifactId>spring-boot-starter-web</artifactId>             <!--            <version>2.4.2</version>-->         </dependency>           <!-- 引入H2数据库，一种内嵌的数据库，语法类似MySQL -->         <!-- https://mvnrepository.com/artifact/com.h2database/h2 -->         <dependency>             <groupId>com.h2database</groupId>             <artifactId>h2</artifactId>             <version>1.4.200</version>             <!--            <scope>test</scope>-->         </dependency>           <!-- https://mvnrepository.com/artifact/org.projectlombok/lombok -->         <dependency>             <groupId>org.projectlombok</groupId>             <artifactId>lombok</artifactId>             <version>1.18.18</version>             <scope>provided</scope>         </dependency>           <!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-test -->         <dependency>             <groupId>org.springframework.boot</groupId>             <artifactId>spring-boot-starter-test</artifactId>             <!--            <version>2.4.2</version>-->             <scope>test</scope>         </dependency>         <!-- https://mvnrepository.com/artifact/org.apache.maven.plugins/maven-clean-plugin -->         <dependency>             <groupId>org.apache.maven.plugins</groupId>             <artifactId>maven-clean-plugin</artifactId>             <version>2.5</version>         </dependency>         <dependency>             <groupId>org.springframework.cloud</groupId>             <artifactId>spring-cloud-starter-openfeign</artifactId>         </dependency>         <!-- 新增依赖 -->         <dependency>             <groupId>org.springframework.cloud</groupId>             <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>         </dependency>     </dependencies>       <!-- 引入spring cloud的依赖，不能少，主要用来管理Spring Cloud生态各组件的版本 -->     <dependencyManagement>         <dependencies>             <dependency>                 <groupId>org.springframework.cloud</groupId>                 <artifactId>spring-cloud-dependencies</artifactId>                 <version>Finchley.SR2</version>                 <type>pom</type>                 <scope>import</scope>             </dependency>         </dependencies>     </dependencyManagement>       <build>         <plugins>             <plugin>                 <groupId>org.springframework.boot</groupId>                 <artifactId>spring-boot-maven-plugin</artifactId>             </plugin>             <plugin>                 <groupId>org.apache.maven.plugins</groupId>                 <artifactId>maven-compiler-plugin</artifactId>                 <version>2.5.1</version>                 <configuration>                     <source>1.8</source>                     <target>1.8</target>                 </configuration>             </plugin>         </plugins>     </build>   </project>

　　app.java

启动类添加

@EnableFeignClients

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package com.lzj1234;   import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.cloud.client.discovery.EnableDiscoveryClient; import org.springframework.cloud.openfeign.EnableFeignClients;   @SpringBootApplication @EnableDiscoveryClient @EnableFeignClients public class App {     public static void main(String[] args) {         SpringApplication.run(App.class,args);     } }

　　

User

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package com.lzj1234;     import lombok.AllArgsConstructor; import lombok.Data; import lombok.NoArgsConstructor;   import java.math.BigDecimal;   @Data @AllArgsConstructor @NoArgsConstructor public class User {     private Long id;     private String username;     private String name;     private Integer age;     private BigDecimal balance; }

　　

UserFeignClient

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package com.lzj1234;     import org.springframework.cloud.openfeign.FeignClient; import org.springframework.web.bind.annotation.GetMapping; import org.springframework.web.bind.annotation.PathVariable;   @FeignClient(name = "microservice-provider-user") public interface UserFeignClient {       @GetMapping("/users/{id}")     User findById(@PathVariable("id") Long id); }

　　这样一个 Feign Client 就写完啦！其中，@FeignClient 注解中的 microservice-provider-user 是想要请求服务的名称，这是用来创建 Ribbon Client 的（Feign 整合了 Ribbon）。在本例中，由于使用了 Eureka，所以 Ribbon 会把 microservice-provider-user 解析成 Eureka Server 中的服务。除此之外，还可使用 url 属性指定请求的 URL（URL 可以是完整的 URL 或主机名），例如 @FeignClient(name = "abcde", url = "http://localhost:8000/")。此外，name 可以是任意值，但不可省略，否则应用将无法启动！

 

MovieController

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package com.lzj1234;     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.RequestMapping; import org.springframework.web.bind.annotation.RestController;   @RequestMapping("/movies") @RestController public class MovieController {       @Autowired     private UserFeignClient userFeignClient;       @GetMapping("/users/{id}")     public User findById(@PathVariable Long id){         return this.userFeignClient.findById(id);     } }

　　application.yml

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server:   port: 8011 spring:   application:     name: microservice-consumer-movie-feign logging:   level:     root: INFO     # 配置日志级别，让hibernate打印出执行的SQL参数     org.hibernate: INFO     org.hibernate.type.descriptor.sql.BasicBinder: TRACE     org.hibernate.type.descriptor.sql.BasicExtractor: TRACE   # 新增配置 eureka:   client:     serviceUrl:       defaultZone: http://localhost:8080/eureka/   instance:     prefer-ip-address: true

　　mvn spring-boot:run 

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com.lzj1234.App 2021-02-19 22:56:29.452  INFO 11528 --- [           main] s.c.a.AnnotationConfigApplicationContext : Refreshing org.springframework.context.annotation.AnnotationConfigApplicationContext@223d2c72: startup date [Fri Feb 19 22:56:29 CST 2021]; root of context hierarchy 2021-02-19 22:56:29.620  INFO 11528 --- [           main] f.a.AutowiredAnnotationBeanPostProcessor : JSR-330 'javax.inject.Inject' annotation found and supported for autowiring 2021-02-19 22:56:29.656  INFO 11528 --- [           main] trationDelegate$BeanPostProcessorChecker : Bean 'configurationPropertiesRebinderAutoConfiguration' of type [org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration$$EnhancerBySpringCGLIB$$545391d9] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying)     .   ____          _            __ _ _  /\\ / ___'_ __ _ _(_)_ __  __ _ \ \ \ \ ( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \  \\/  ___)| |_)| | | | | || (_| |  ) ) ) )   '  |____| .__|_| |_|_| |_\__, | / / / /  =========|_|==============|___/=/_/_/_/  :: Spring Boot ::        (v2.0.7.RELEASE)   2021-02-19 22:56:31.220  INFO 11528 --- [           main] com.lzj1234.App                          : No active profile set, falling back to default profiles: default 2021-02-19 22:56:31.234  INFO 11528 --- [           main] ConfigServletWebServerApplicationContext : Refreshing org.springframework.boot.web.servlet.context.AnnotationConfigServletWebServerApplicationContext@71e9ebae: startup date [Fri Feb 19 22:56:31 CST 2021]; parent: org.springframework.context.annotation.AnnotationConfigApplicationContext@223d2c72 2021-02-19 22:56:31.862  INFO 11528 --- [           main] o.s.b.f.s.DefaultListableBeanFactory     : Overriding bean definition for bean 'dataSource' with a different definition: replacing [Root bean: class [null]; scope=refresh; abstract=false; lazyInit=false; autowireMode=3; dependencyCheck=0; autowireCandidate=false; primary=false; factoryBeanName=org.springframework.boot.autoconfigure.jdbc.DataSourceConfiguration$Hikari; factoryMethodName=dataSource; initMethodName=null; destroyMethodName=(inferred); defined in class path resource [org/springframework/boot/autoconfigure/jdbc/DataSourceConfiguration$Hikari.class]] with [Root bean: class [org.springframework.aop.scope.ScopedProxyFactoryBean]; scope=; abstract=false; lazyInit=false; autowireMode=0; dependencyCheck=0; autowireCandidate=true; primary=false; factoryBeanName=null; factoryMethodName=null; initMethodName=null; destroyMethodName=null; defined in BeanDefinition defined in class path resource [org/springframework/boot/autoconfigure/jdbc/DataSourceConfiguration$Hikari.class]] 2021-02-19 22:56:31.978  INFO 11528 --- [           main] o.s.cloud.context.scope.GenericScope     : BeanFactory id=0bdaccc7-6a04-30ed-b197-e7493782dde9 2021-02-19 22:56:32.005  INFO 11528 --- [           main] f.a.AutowiredAnnotationBeanPostProcessor : JSR-330 'javax.inject.Inject' annotation found and supported for autowiring 2021-02-19 22:56:32.110  INFO 11528 --- [           main] trationDelegate$BeanPostProcessorChecker : Bean 'org.springframework.transaction.annotation.ProxyTransactionManagementConfiguration' of type [org.springframework.transaction.annotation.ProxyTransactionManagementConfiguration$$EnhancerBySpringCGLIB$$38398edc] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying) 2021-02-19 22:56:32.147  INFO 11528 --- [           main] trationDelegate$BeanPostProcessorChecker : Bean 'org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration' of type [org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration$$EnhancerBySpringCGLIB$$545391d9] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying) 2021-02-19 22:56:32.512  INFO 11528 --- [           main] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat initialized with port(s): 8011 (http) 2021-02-19 22:56:32.539  INFO 11528 --- [           main] o.apache.catalina.core.StandardService   : Starting service [Tomcat] 2021-02-19 22:56:32.539  INFO 11528 --- [           main] org.apache.catalina.core.StandardEngine  : Starting Servlet Engine: Apache Tomcat/8.5.35 2021-02-19 22:56:32.545  INFO 11528 --- [ost-startStop-1] o.a.catalina.core.AprLifecycleListener   : The APR based Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path: [D:\kaifa\java\jdk\bin;C:\Windows\Sun\Java\bin;C:\Windows\system32;C:\Windows;D:\kaifa\anaconda;D:\kaifa\anaconda\Library\mingw-w64\bin;D:\kaifa\anaconda\Library\usr\bin;D:\kaifa\anaconda\Library\bin;D:\kaifa\anaconda\Scripts;C:\ProgramData\Oracle\Java\javapath;C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0\;C:\Windows\System32\OpenSSH\;D:\kaifa\Git\cmd;C:\Program Files\Pandoc\;D:\kaifa\java\jdk\bin;D:\kaifa\java\jdk\jre\bin;E:\kaifa\hadoop-2.6.5\bin;C:\Program Files\Microsoft VS Code\bin;D:\kaifa\platform-tools;D:\kaifa\nodejs\;D:\kaifa\nodejs\node_global;D:\kaifa\nodejs\node_global;C:\Users\l\Documents\逆向\soft\android-sdk_r24.4.1-windows\android-sdk-windows\platform-tools;C:\Users\l\Documents\逆向\soft\android-sdk_r24.4.1-windows\android-sdk-windows\tools;C:\Users\l\Documents\逆向\soft\android-ndk-r21b-windows-x86_64\android-ndk-r21b;D:\kaifa\apache-maven-3.6.3-bin\apache-maven-3.6.3\bin;%CATALINA_HOME%\bin;%CATALINA_HOME%\lib;C:\Users\l\AppData\Local\Android\Sdk\platform-tools;D:\kaifa\python3\Scripts\;D:\kaifa\python3\;C:\Users\l\AppData\Local\Microsoft\WindowsApps;;D:\kaifa\Fiddler;C:\Users\l\AppData\Roaming\npm;.] 2021-02-19 22:56:32.716  INFO 11528 --- [ost-startStop-1] o.a.c.c.C.[Tomcat].[localhost].[/]       : Initializing Spring embedded WebApplicationContext 2021-02-19 22:56:32.717  INFO 11528 --- [ost-startStop-1] o.s.web.context.ContextLoader            : Root WebApplicationContext: initialization completed in 1483 ms 2021-02-19 22:56:32.797  INFO 11528 --- [ost-startStop-1] o.s.b.w.servlet.ServletRegistrationBean  : Servlet dispatcherServlet mapped to [/] 2021-02-19 22:56:32.803  INFO 11528 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean   : Mapping filter: 'characterEncodingFilter' to: [/*] 2021-02-19 22:56:32.804  INFO 11528 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean   : Mapping filter: 'hiddenHttpMethodFilter' to: [/*] 2021-02-19 22:56:32.804  INFO 11528 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean   : Mapping filter: 'httpPutFormContentFilter' to: [/*] 2021-02-19 22:56:32.804  INFO 11528 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean   : Mapping filter: 'requestContextFilter' to: [/*] 2021-02-19 22:56:32.978  INFO 11528 --- [           main] com.zaxxer.hikari.HikariDataSource       : HikariPool-1 - Starting... 2021-02-19 22:56:33.189  INFO 11528 --- [           main] com.zaxxer.hikari.HikariDataSource       : HikariPool-1 - Start completed. 2021-02-19 22:56:33.238  INFO 11528 --- [           main] j.LocalContainerEntityManagerFactoryBean : Building JPA container EntityManagerFactory for persistence unit 'default' 2021-02-19 22:56:33.252  INFO 11528 --- [           main] o.hibernate.jpa.internal.util.LogHelper  : HHH000204: Processing PersistenceUnitInfo [     name: default     ...] 2021-02-19 22:56:33.325  INFO 11528 --- [           main] org.hibernate.Version                    : HHH000412: Hibernate Core {5.2.17.Final} 2021-02-19 22:56:33.327  INFO 11528 --- [           main] org.hibernate.cfg.Environment            : HHH000206: hibernate.properties not found 2021-02-19 22:56:33.368  INFO 11528 --- [           main] o.hibernate.annotations.common.Version   : HCANN000001: Hibernate Commons Annotations {5.0.1.Final} 2021-02-19 22:56:33.490  INFO 11528 --- [           main] org.hibernate.dialect.Dialect            : HHH000400: Using dialect: org.hibernate.dialect.H2Dialect 2021-02-19 22:56:33.738  INFO 11528 --- [           main] o.h.t.schema.internal.SchemaCreatorImpl  : HHH000476: Executing import script 'org.hibernate.tool.schema.internal.exec.ScriptSourceInputNonExistentImpl@421def93' 2021-02-19 22:56:33.741  INFO 11528 --- [           main] j.LocalContainerEntityManagerFactoryBean : Initialized JPA EntityManagerFactory for persistence unit 'default' 2021-02-19 22:56:33.772  INFO 11528 --- [           main] s.c.a.AnnotationConfigApplicationContext : Refreshing FeignContext-microservice-provider-user: startup date [Fri Feb 19 22:56:33 CST 2021]; parent: org.springframework.boot.web.servlet.context.AnnotationConfigServletWebServerApplicationContext@71e9ebae 2021-02-19 22:56:33.791  INFO 11528 --- [           main] f.a.AutowiredAnnotationBeanPostProcessor : JSR-330 'javax.inject.Inject' annotation found and supported for autowiring 2021-02-19 22:56:33.995  WARN 11528 --- [           main] c.n.c.sources.URLConfigurationSource     : No URLs will be polled as dynamic configuration sources. 2021-02-19 22:56:33.996  INFO 11528 --- [           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. 2021-02-19 22:56:34.003  WARN 11528 --- [           main] c.n.c.sources.URLConfigurationSource     : No URLs will be polled as dynamic configuration sources. 2021-02-19 22:56:34.003  INFO 11528 --- [           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. 2021-02-19 22:56:34.093  INFO 11528 --- [           main] o.s.w.s.handler.SimpleUrlHandlerMapping  : Mapped URL path [/**/favicon.ico] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler] 2021-02-19 22:56:34.313  INFO 11528 --- [           main] s.w.s.m.m.a.RequestMappingHandlerAdapter : Looking for @ControllerAdvice: org.springframework.boot.web.servlet.context.AnnotationConfigServletWebServerApplicationContext@71e9ebae: startup date [Fri Feb 19 22:56:31 CST 2021]; parent: org.springframework.context.annotation.AnnotationConfigApplicationContext@223d2c72 2021-02-19 22:56:34.348  WARN 11528 --- [           main] aWebConfiguration$JpaWebMvcConfiguration : spring.jpa.open-in-view is enabled by default. Therefore, database queries may be performed during view rendering. Explicitly configure spring.jpa.open-in-view to disable this warning 2021-02-19 22:56:34.382  INFO 11528 --- [           main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/movies/users/{id}],methods=[GET]}" onto public com.lzj1234.User com.lzj1234.MovieController.findById(java.lang.Long) 2021-02-19 22:56:34.385  INFO 11528 --- [           main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/error]}" onto public org.springframework.http.ResponseEntity<java.util.Map<java.lang.String, java.lang.Object>> org.springframework.boot.autoconfigure.web.servlet.error.BasicErrorController.error(javax.servlet.http.HttpServletRequest) 2021-02-19 22:56:34.386  INFO 11528 --- [           main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/error],produces=[text/html]}" onto public org.springframework.web.servlet.ModelAndView org.springframework.boot.autoconfigure.web.servlet.error.BasicErrorController.errorHtml(javax.servlet.http.HttpServletRequest,javax.servlet.http.HttpServletResponse) 2021-02-19 22:56:34.430  INFO 11528 --- [           main] o.s.w.s.handler.SimpleUrlHandlerMapping  : Mapped URL path [/webjars/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler] 2021-02-19 22:56:34.430  INFO 11528 --- [           main] o.s.w.s.handler.SimpleUrlHandlerMapping  : Mapped URL path [/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler] 2021-02-19 22:56:37.894  INFO 11528 --- [           main] o.s.j.e.a.AnnotationMBeanExporter        : Registering beans for JMX exposure on startup 2021-02-19 22:56:37.895  INFO 11528 --- [           main] o.s.j.e.a.AnnotationMBeanExporter        : Bean with name 'dataSource' has been autodetected for JMX exposure 2021-02-19 22:56:37.902  INFO 11528 --- [           main] o.s.j.e.a.AnnotationMBeanExporter        : Bean with name 'refreshScope' has been autodetected for JMX exposure 2021-02-19 22:56:37.904  INFO 11528 --- [           main] o.s.j.e.a.AnnotationMBeanExporter        : Bean with name 'configurationPropertiesRebinder' has been autodetected for JMX exposure 2021-02-19 22:56:37.904  INFO 11528 --- [           main] o.s.j.e.a.AnnotationMBeanExporter        : Bean with name 'environmentManager' has been autodetected for JMX exposure 2021-02-19 22:56:37.907  INFO 11528 --- [           main] o.s.j.e.a.AnnotationMBeanExporter        : Located managed bean 'environmentManager': registering with JMX server as MBean [org.springframework.cloud.context.environment:name=environmentManager,type=EnvironmentManager] 2021-02-19 22:56:37.920  INFO 11528 --- [           main] o.s.j.e.a.AnnotationMBeanExporter        : Located managed bean 'refreshScope': registering with JMX server as MBean [org.springframework.cloud.context.scope.refresh:name=refreshScope,type=RefreshScope] 2021-02-19 22:56:37.929  INFO 11528 --- [           main] o.s.j.e.a.AnnotationMBeanExporter        : Located managed bean 'configurationPropertiesRebinder': registering with JMX server as MBean [org.springframework.cloud.context.properties:name=configurationPropertiesRebinder,context=71e9ebae,type=ConfigurationPropertiesRebinder] 2021-02-19 22:56:37.935  INFO 11528 --- [           main] o.s.j.e.a.AnnotationMBeanExporter        : Located MBean 'dataSource': registering with JMX server as MBean [com.zaxxer.hikari:name=dataSource,type=HikariDataSource] 2021-02-19 22:56:37.939  INFO 11528 --- [           main] o.s.c.support.DefaultLifecycleProcessor  : Starting beans in phase 0 2021-02-19 22:56:37.951  INFO 11528 --- [           main] o.s.c.n.eureka.InstanceInfoFactory       : Setting initial instance status as: STARTING 2021-02-19 22:56:37.994  INFO 11528 --- [           main] com.netflix.discovery.DiscoveryClient    : Initializing Eureka in region us-east-1 2021-02-19 22:56:38.137  INFO 11528 --- [           main] c.n.d.provider.DiscoveryJerseyProvider   : Using JSON encoding codec LegacyJacksonJson 2021-02-19 22:56:38.137  INFO 11528 --- [           main] c.n.d.provider.DiscoveryJerseyProvider   : Using JSON decoding codec LegacyJacksonJson 2021-02-19 22:56:38.275  INFO 11528 --- [           main] c.n.d.provider.DiscoveryJerseyProvider   : Using XML encoding codec XStreamXml 2021-02-19 22:56:38.275  INFO 11528 --- [           main] c.n.d.provider.DiscoveryJerseyProvider   : Using XML decoding codec XStreamXml 2021-02-19 22:56:38.490  INFO 11528 --- [           main] c.n.d.s.r.aws.ConfigClusterResolver      : Resolving eureka endpoints via configuration 2021-02-19 22:56:39.196  INFO 11528 --- [           main] com.netflix.discovery.DiscoveryClient    : Disable delta property : false 2021-02-19 22:56:39.196  INFO 11528 --- [           main] com.netflix.discovery.DiscoveryClient    : Single vip registry refresh property : null 2021-02-19 22:56:39.196  INFO 11528 --- [           main] com.netflix.discovery.DiscoveryClient    : Force full registry fetch : false 2021-02-19 22:56:39.196  INFO 11528 --- [           main] com.netflix.discovery.DiscoveryClient    : Application is null : false 2021-02-19 22:56:39.196  INFO 11528 --- [           main] com.netflix.discovery.DiscoveryClient    : Registered Applications size is zero : true 2021-02-19 22:56:39.196  INFO 11528 --- [           main] com.netflix.discovery.DiscoveryClient    : Application version is -1: true 2021-02-19 22:56:39.196  INFO 11528 --- [           main] com.netflix.discovery.DiscoveryClient    : Getting all instance registry info from the eureka server 2021-02-19 22:56:39.371  INFO 11528 --- [           main] com.netflix.discovery.DiscoveryClient    : The response status is 200 2021-02-19 22:56:39.374  INFO 11528 --- [           main] com.netflix.discovery.DiscoveryClient    : Starting heartbeat executor: renew interval is: 30 2021-02-19 22:56:39.376  INFO 11528 --- [           main] c.n.discovery.InstanceInfoReplicator     : InstanceInfoReplicator onDemand update allowed rate per min is 4 2021-02-19 22:56:39.381  INFO 11528 --- [           main] com.netflix.discovery.DiscoveryClient    : Discovery Client initialized at timestamp 1613746599380 with initial instances count: 3 2021-02-19 22:56:39.386  INFO 11528 --- [           main] o.s.c.n.e.s.EurekaServiceRegistry        : Registering application MICROSERVICE-CONSUMER-MOVIE-FEIGN with eureka with status UP 2021-02-19 22:56:39.386  INFO 11528 --- [           main] com.netflix.discovery.DiscoveryClient    : Saw local status change event StatusChangeEvent [timestamp=1613746599386, current=UP, previous=STARTING] 2021-02-19 22:56:39.388  INFO 11528 --- [nfoReplicator-0] com.netflix.discovery.DiscoveryClient    : DiscoveryClient_MICROSERVICE-CONSUMER-MOVIE-FEIGN/DESKTOP-SRVQTV7:microservice-consumer-movie-feign:8011: registering service... 2021-02-19 22:56:39.431  INFO 11528 --- [           main] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat started on port(s): 8011 (http) with context path '' 2021-02-19 22:56:39.432  INFO 11528 --- [           main] .s.c.n.e.s.EurekaAutoServiceRegistration : Updating port to 8011 2021-02-19 22:56:39.436  INFO 11528 --- [           main] com.lzj1234.App                          : Started App in 11.967 seconds (JVM running for 13.749) 2021-02-19 22:56:39.436  INFO 11528 --- [nfoReplicator-0] com.netflix.discovery.DiscoveryClient    : DiscoveryClient_MICROSERVICE-CONSUMER-MOVIE-FEIGN/DESKTOP-SRVQTV7:microservice-consumer-movie-feign:8011 - registration status: 204 2021-02-19 22:56:54.836  INFO 11528 --- [nio-8011-exec-1] o.a.c.c.C.[Tomcat].[localhost].[/]       : Initializing Spring FrameworkServlet 'dispatcherServlet' 2021-02-19 22:56:54.836  INFO 11528 --- [nio-8011-exec-1] o.s.web.servlet.DispatcherServlet        : FrameworkServlet 'dispatcherServlet': initialization started 2021-02-19 22:56:54.859  INFO 11528 --- [nio-8011-exec-1] o.s.web.servlet.DispatcherServlet        : FrameworkServlet 'dispatcherServlet': initialization completed in 23 ms 2021-02-19 22:56:54.959  INFO 11528 --- [nio-8011-exec-1] s.c.a.AnnotationConfigApplicationContext : Refreshing SpringClientFactory-microservice-provider-user: startup date [Fri Feb 19 22:56:54 CST 2021]; parent: org.springframework.boot.web.servlet.context.AnnotationConfigServletWebServerApplicationContext@71e9ebae 2021-02-19 22:56:55.013  INFO 11528 --- [nio-8011-exec-1] f.a.AutowiredAnnotationBeanPostProcessor : JSR-330 'javax.inject.Inject' annotation found and supported for autowiring 2021-02-19 22:56:55.248  INFO 11528 --- [nio-8011-exec-1] c.netflix.config.ChainedDynamicProperty  : Flipping property: microservice-provider-user.ribbon.ActiveConnectionsLimit to use NEXT property: niws.loadbalancer.availabilityFilteringRule.activeConnectionsLimit = 2147483647 2021-02-19 22:56:55.267  INFO 11528 --- [nio-8011-exec-1] c.n.u.concurrent.ShutdownEnabledTimer    : Shutdown hook installed for: NFLoadBalancer-PingTimer-microservice-provider-user 2021-02-19 22:56:55.289  INFO 11528 --- [nio-8011-exec-1] c.netflix.loadbalancer.BaseLoadBalancer  : Client: microservice-provider-user instantiated a LoadBalancer: DynamicServerListLoadBalancer:{NFLoadBalancer:name=microservice-provider-user,current list of Servers=[],Load balancer stats=Zone stats: {},Server stats: []}ServerList:null 2021-02-19 22:56:55.296  INFO 11528 --- [nio-8011-exec-1] c.n.l.DynamicServerListLoadBalancer      : Using serverListUpdater PollingServerListUpdater 2021-02-19 22:56:55.318  INFO 11528 --- [nio-8011-exec-1] c.netflix.config.ChainedDynamicProperty  : Flipping property: microservice-provider-user.ribbon.ActiveConnectionsLimit to use NEXT property: niws.loadbalancer.availabilityFilteringRule.activeConnectionsLimit = 2147483647 2021-02-19 22:56:55.320  INFO 11528 --- [nio-8011-exec-1] c.n.l.DynamicServerListLoadBalancer      : DynamicServerListLoadBalancer for client microservice-provider-user initialized: DynamicServerListLoadBalancer:{NFLoadBalancer:name=microservice-provider-user,current list of Servers=[192.168.0.106:8000],Load balancer stats=Zone stats: {defaultzone=[Zone:defaultzone;    Instance count:1;   Active connections count: 0;    Circuit breaker tripped count: 0;   Active connections per server: 0.0;] },Server stats: [[Server:192.168.0.106:8000;    Zone:defaultZone;   Total Requests:0;   Successive connection failure:0;    Total blackout seconds:0;   Last connection made:Thu Jan 01 08:00:00 CST 1970;  First connection made: Thu Jan 01 08:00:00 CST 1970;    Active Connections:0;   total failure count in last (1000) msecs:0; average resp time:0.0;  90 percentile resp time:0.0;    95 percentile resp time:0.0;    min resp time:0.0;  max resp time:0.0;  stddev resp time:0.0] ]}ServerList:org.springframework.cloud.netflix.ribbon.eureka.DomainExtractingServerList@5da3e3ec 2021-02-19 22:56:56.298  INFO 11528 --- [erListUpdater-0] c.netflix.config.ChainedDynamicProperty  : Flipping property: microservice-provider-user.ribbon.ActiveConnectionsLimit to use NEXT property: niws.loadbalancer.availabilityFilteringRule.activeConnectionsLimit = 2147483647 2021-02-19 23:01:39.199  INFO 11528 --- [trap-executor-0] c.n.d.s.r.aws.ConfigClusterResolver      : Resolving eureka endpoints via configuration 2021-02-19 23:06:39.201  INFO 11528 --- [trap-executor-0] c.n.d.s.r.aws.ConfigClusterResolver      : Resolving eureka endpoints via configuration 2021-02-19 23:11:39.202  INFO 11528 --- [trap-executor-0] c.n.d.s.r.aws.ConfigClusterResolver      : Resolving eureka endpoints via configuration 2021-02-19 23:16:39.203  INFO 11528 --- [trap-executor-0] c.n.d.s.r.aws.ConfigClusterResolver      : Resolving eureka endpoints via configuration 2021-02-19 23:21:39.204  INFO 11528 --- [trap-executor-0] c.n.d.s.r.aws.ConfigClusterResolver      : Resolving eureka endpoints via configuration 2021-02-19 23:26:39.205  INFO 11528 --- [trap-executor-0] c.n.d.s.r.aws.ConfigClusterResolver      : Resolving eureka endpoints via configuration 2021-02-19 23:31:39.207  INFO 11528 --- [trap-executor-0] c.n.d.s.r.aws.ConfigClusterResolver      : Resolving eureka endpoints via configuration 2021-02-19 23:36:39.208  INFO 11528 --- [trap-executor-0] c.n.d.s.r.aws.ConfigClusterResolver      : Resolving eureka endpoints via configuration 2021-02-19 23:41:39.209  INFO 11528 --- [trap-executor-0] c.n.d.s.r.aws.ConfigClusterResolver      : Resolving eureka endpoints via configuration 2021-02-19 23:46:39.211  INFO 11528 --- [trap-executor-0] c.n.d.s.r.aws.ConfigClusterResolver      : Resolving eureka endpoints via configuration 2021-02-19 23:51:39.212  INFO 11528 --- [trap-executor-0] c.n.d.s.r.aws.ConfigClusterResolver      : Resolving eureka endpoints via configuration 2021-02-19 23:56:39.213  INFO 11528 --- [trap-executor-0] c.n.d.s.r.aws.ConfigClusterResolver      : Resolving eureka endpoints via configuration 2021-02-20 00:01:39.214  INFO 11528 --- [trap-executor-0] c.n.d.s.r.aws.ConfigClusterResolver      : Resolving eureka endpoints via configuration 2021-02-20 00:06:39.215  INFO 11528 --- [trap-executor-0] c.n.d.s.r.aws.ConfigClusterResolver      : Resolving eureka endpoints via configuration 2021-02-20 00:11:39.216  INFO 11528 --- [trap-executor-0] c.n.d.s.r.aws.ConfigClusterResolver      : Resolving eureka endpoints via configuration

　　

 

 

 

 

服务提供者打印日志

Hibernate: select user0_.id as id1_0_0_, user0_.age as age2_0_0_, user0_.balance as balance3_0_0_, user0_.name as name4_0_0_, user0_.username as username5_0_0_ from user user0_ where user0_.id=?
2021-02-20 00:18:39.839 TRACE 20804 --- [nio-8000-exec-8] o.h.type.descriptor.sql.BasicBinder : binding parameter [1] as [BIGINT] - [3]
2021-02-20 00:18:39.840 TRACE 20804 --- [nio-8000-exec-8] o.h.type.descriptor.sql.BasicExtractor : extracted value ([age2_0_0_] : [INTEGER]) - [32]
2021-02-20 00:18:39.840 TRACE 20804 --- [nio-8000-exec-8] o.h.type.descriptor.sql.BasicExtractor : extracted value ([balance3_0_0_] : [NUMERIC]) - [280.00]
2021-02-20 00:18:39.840 TRACE 20804 --- [nio-8000-exec-8] o.h.type.descriptor.sql.BasicExtractor : extracted value ([name4_0_0_] : [VARCHAR]) - [王五]
2021-02-20 00:18:39.840 TRACE 20804 --- [nio-8000-exec-8] o.h.type.descriptor.sql.BasicExtractor : extracted value ([username5_0_0_] : [VARCHAR]) - [account3]