一、创建模块（microservice-consumer-movie-feign-customizing）

了解springcloud架构可以加求求：三五三六二四七二五九

项目结构如下：

在这里插入图片描述
二、pom.xml文件

<?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"> <parent> <artifactId>microservice-spring-cloud</artifactId> <groupId>com.jacky</groupId> <version>1.0-SNAPSHOT</version> </parent> <modelVersion>4.0.0</modelVersion> <artifactId>microservice-consumer-movie-feign-customizing</artifactId> <packaging>jar</packaging> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding> <java.version>1.8</java.version> </properties> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-eureka</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-actuator</artifactId> </dependency> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-feign</artifactId> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>com.spotify</groupId> <artifactId>docker-maven-plugin</artifactId> <executions> <!--设置在执行maven 的install时构建镜像--> <execution> <id>build-image</id> <phase>install</phase> <goals> <goal>build</goal> </goals> </execution> </executions> <configuration> <!--安装了docker的主机，并且打开了api remote接口设置--> <dockerHost>http://192.168.6.130:5678</dockerHost> <pushImage>true</pushImage><!--设置上传镜像到私有仓库，需要docker设置指定私有仓库地址--> <!--镜像名称--> <imageName>${docker.repostory}/${docker.image.prefix}/${project.artifactId}:${project.version}</imageName> <!--镜像的基础版本--> <baseImage>java:openjdk-8-jdk-alpine</baseImage> <!--镜像启动参数--> <entryPoint>["java", "-jar", "/${project.build.finalName}.jar"]</entryPoint> <resources> <resource> <targetPath>/</targetPath> <directory>${project.build.directory}</directory> <include>${project.build.finalName}.jar</include> </resource> </resources> </configuration> </plugin> </plugins> </build></project>

三、配置文件

spring: application: name: microservice-consumer-movie-feign-customizingserver: port: 7901eureka: client: healthcheck: enabled: true serviceUrl: defaultZone: http://jacky:admin@peer1:8761/eureka/,http://jacky:admin@peer2:8762/eureka/,http://jacky:admin@peer3:8763/eureka/ instance: prefer-ip-address: true#feign日志配置logging: level: com.jacky.cloud.feign.UserFeignClient: DEBUG# 解决第一次请求报超时异常的方案：# hystrix.command.default.execution.isolation.thread.timeoutInMilliseconds: 5000 #延长超时时间# 或者：# hystrix.command.default.execution.timeout.enabled: false# 或者：feign.hystrix.enabled: false # 索性禁用feign的hystrix支持# 超时的issue：https://github.com/spring-cloud/spring-cloud-netflix/issues/768# 超时的解决方案： http://stackoverflow.com/questions/27375557/hystrix-command-fails-with-timed-out-and-no-fallback-available# hystrix配置： https://github.com/Netflix/Hystrix/wiki/Configuration#execution.isolation.thread.timeoutInMilliseconds

四、实体类User.java

package com.jacky.cloud.entity;import java.math.BigDecimal;public class User { private Long id; private String username; private String name; private Short age; private BigDecimal balance; public Long getId() { return this.id; } public void setId(Long id) { this.id = id; } public String getUsername() { return this.username; } public void setUsername(String username) { this.username = username; } public String getName() { return this.name; } public void setName(String name) { this.name = name; } public Short getAge() { return this.age; } public void setAge(Short age) { this.age = age; } public BigDecimal getBalance() { return this.balance; } public void setBalance(BigDecimal balance) { this.balance = balance; }}

五、feign客户端1（UserFeignClient1.java）

package com.jacky.cloud.feign;import org.springframework.cloud.netflix.feign.FeignClient;import com.jacky.cloud.entity.User;import com.jacky.config.Configuration1;import feign.Param;import feign.RequestLine;@FeignClient(name = "microservice-provider-user", configuration = Configuration1.class)public interface UserFeignClient1 { @RequestLine("GET /simple/{id}") public User findById(@Param("id") Long id);}

六、feign客户端2（UserFeignClient2.java）

package com.jacky.cloud.feign;import org.springframework.cloud.netflix.feign.FeignClient;import org.springframework.web.bind.annotation.PathVariable;import org.springframework.web.bind.annotation.RequestMapping;import com.jacky.config.Configuration2;@FeignClient(name = "xxxx", url = "http://localhost:8761/", configuration = Configuration2.class)public interface UserFeignClient2 { @RequestMapping(value = "/eureka/apps/{serviceName}") public String findServiceInfoFromEurekaByServiceName(@PathVariable("serviceName") String serviceName);}

七、feign配置类1（Configuration1.java）

package com.jacky.config;import org.springframework.context.annotation.Bean;import org.springframework.context.annotation.Configuration;import feign.Contract;import feign.Logger;@Configurationpublic class Configuration1 { @Bean public Contract feignContract() { return new feign.Contract.Default(); } @Bean Logger.Level feignLoggerLevel() { return Logger.Level.FULL; //定义feign日志显示级别 }}

八、feign配置类2（Configuration2.java）

package com.jacky.config;import org.springframework.context.annotation.Bean;import org.springframework.context.annotation.Configuration;import feign.auth.BasicAuthRequestInterceptor;@Configurationpublic class Configuration2 { @Bean public BasicAuthRequestInterceptor basicAuthRequestInterceptor() { return new BasicAuthRequestInterceptor("jacky", "admin"); //Eureka添加了安全验证，则需要配置上面的用户名、密码 }}

九、MovieController.java

package com.jacky.cloud.controller;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.RestController;import com.jacky.cloud.entity.User;import com.jacky.cloud.feign.UserFeignClient2;import com.jacky.cloud.feign.UserFeignClient1;@RestControllerpublic class MovieController { @Autowired private UserFeignClient1 userFeignClient1; @Autowired private UserFeignClient2 userfeignClient2; /** * 调用生产者服务 * @param id * @return */ @GetMapping("/movie/{id}") public User findById(@PathVariable Long id) { return this.userFeignClient1.findById(id); } /** * 获得服务在eureka信息 * @param serviceName * @return */ @GetMapping("/{serviceName}") public String findServiceInfoFromEurekaByServiceName(@PathVariable String serviceName) { return this.userfeignClient2.findServiceInfoFromEurekaByServiceName(serviceName); }}

十、启动类ConsumerMovieFeignApplication.java

package com.jacky.cloud;import org.springframework.boot.SpringApplication;import org.springframework.boot.autoconfigure.SpringBootApplication;import org.springframework.cloud.netflix.eureka.EnableEurekaClient;import org.springframework.cloud.netflix.feign.EnableFeignClients;@SpringBootApplication@EnableEurekaClient@EnableFeignClientspublic class ConsumerMovieFeignApplication { public static void main(String[] args) { SpringApplication.run(ConsumerMovieFeignApplication.class, args); }}