@[TOC](SpringCloud-2.X 學習筆記03.1 Eureka Consumer (Feign) 搭建)

1 搭建服務

2 添加注解

package com.xu.eureka.consumer.feign;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.openfeign.EnableFeignClients;

@EnableFeignClients
@SpringBootApplication
public class FeignApplication {

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

}

3 修改配置

applocation.properties

# 應用名稱
spring.application.name=EurekaConsumer_Feign
# 應用服務 WEB 訪問端口
server.port=8088
# spring 靜態資源掃描路徑
spring.resources.static_locations=classpath:/static/
# 訪問template下的html文件需要配置模板
spring.thymeleaf.prefix.classpath=classpath:/templates/
# 是否啟用緩存
spring.thymeleaf.cache=false
# 模板文件后綴
spring.thymeleaf.suffix=.html
# 模板文件編碼
spring.thymeleaf.encoding=UTF-8
# Eureka 注冊中心
eureka.client.serviceUrl.defaultZone=http://127.0.0.1:8761/eureka/

pom.xml

<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>com.xu.eureka.consumer</groupId>
    <artifactId>feign</artifactId>
    <version>1.0.0-SNAPSHOT</version>
    <name>feign</name>
    <description>Demo project for Spring Boot</description>

    <properties>
        <java.version>1.8</java.version>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <spring-boot.version>2.3.0.RELEASE</spring-boot.version>
        <spring-cloud.version>Hoxton.SR4</spring-cloud.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-thymeleaf</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-openfeign</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <scope>runtime</scope>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
            <exclusions>
                <exclusion>
                    <groupId>org.junit.vintage</groupId>
                    <artifactId>junit-vintage-engine</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
    </dependencies>

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>${spring-cloud.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-dependencies</artifactId>
                <version>${spring-boot.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>

    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.8.1</version>
                <configuration>
                    <source>1.8</source>
                    <target>1.8</target>
                    <encoding>UTF-8</encoding>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <version>2.3.0.RELEASE</version>
                <configuration>
                    <mainClass>com.xu.eureka.consumer.feign.FeignApplication</mainClass>
                </configuration>
                <executions>
                    <execution>
                        <id>repackage</id>
                        <goals>
                            <goal>repackage</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>
        </plugins>
    </build>

</project>

4 測試代碼

ArticleController.java

package com.xu.eureka.consumer.feign.controler;

import com.xu.eureka.consumer.feign.service.ArticleService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.cloud.client.ServiceInstance;
import org.springframework.cloud.client.loadbalancer.LoadBalancerClient;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;

/**
 * <p>
 * 前端控制器
 * </p>
 *
 * @author hyacinth
 * @since 2020-09-22
 */
@RestController
@RequestMapping("/feign/client/article")
public class ArticleController {

    @Autowired
    private ArticleService articleService;

    @RequestMapping("/v1/t3")
    public Object test() {
        return  articleService.getAllArticleByPage(1);
    }

}

ArticleFeignService.java

package com.xu.eureka.consumer.feign.service;

import org.springframework.cloud.openfeign.FeignClient;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;

@FeignClient(name = "EUREKECLIENT")
public interface ArticleFeignService {

    @RequestMapping(value = "/client/article/get/{index}")
    Object getAllArticleByPage(@PathVariable("index") Integer index);

}

ArticleService.java

package com.xu.eureka.consumer.feign.service;

public interface ArticleService {

    Object getAllArticleByPage(Integer index);

}

ArticleServiceImpl.java

package com.xu.eureka.consumer.feign.service.impl;

import com.xu.eureka.consumer.feign.service.ArticleFeignService;
import com.xu.eureka.consumer.feign.service.ArticleService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

@Service
public class ArticleServiceImpl implements ArticleService {

    @Autowired
    private ArticleFeignService articleFeignService;

    @Override
    public Object getAllArticleByPage(Integer index) {
        return articleFeignService.getAllArticleByPage(index);
    }

}