springboot-springcloud-nacos服务搭建与实现

最新推荐文章于 2025-05-12 22:11:53 发布

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最新推荐文章于 2025-05-12 22:11:53 发布

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文章标签： spring boot spring cloud java

本文链接：https://blog.youkuaiyun.com/qq_24981615/article/details/123014780

准备阶段

1.搭建微服务工程，创建多个微服务，实现多个服务之间的注册和调用

2.下载Nacos 并安装

创建工程springcloudnacos

springcloudnacos 下pom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">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.ws</groupId>
    <artifactId>springcloudnacos</artifactId>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.2.10.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>

    <modules>
        <module>api</module>
        <module>service</module>
<!--        <module>util</module>-->
        <module>service/service-school</module>
        <module>service/service-stu</module>
        <module>service/service-tea</module>
        <module>api/api-school</module>
        <module>api/api-teacher</module>
        <module>api/api-student</module>
    </modules>
    <description>nacos Program</description>

    <properties>
        <java.version>1.8</java.version>
    </properties>

    <packaging>pom</packaging>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>

        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>

    </dependencies>



</project>

在springcloudnacos下分别创建项目service和api

api下创建项目 api-school、api-student、api-teacher

service下创建项目 service-school、service-student、service-teacher

最终结构目录如下

三个项目分别实现查询功能

Nacos调用流程

1.把 service-school、service-student、service-teacher 三个服务在nacos中进行注册

引入依赖（只需引入一次依赖加在service文件下的pom文件里）

        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
            <version>2.2.5.RELEASE</version>
        </dependency>

2.配置文件进行配置

#配置nacos第一步加依赖 第二步设置nacos服务地址
spring.cloud.nacos.discovery.server-addr=127.0.0.1:8848

以 service-student为例

# 服务端口
server.port=8002
# 服务名
spring.application.name=service-student

# 环境设置：dev、test、prod
spring.profiles.active=dev

# mysql数据库连接
spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
spring.datasource.url=jdbc:mysql://localhost:3306/education?serverTimezone=GMT%2B8
spring.datasource.username=root
spring.datasource.password=root

#返回json的全局时间格式
spring.jackson.date-format=yyyy-MM-dd HH:mm:ss
spring.jackson.time-zone=GMT+8

# 设置日志级别
logging.level.root=info

#配置nacos第一步加依赖 第二步设置nacos服务地址
spring.cloud.nacos.discovery.server-addr=127.0.0.1:8848

#解决报错问题
spring.mvc.pathmatch.matching-strategy=ANT_PATH_MATCHER

#mybatis日志
#mybatis-plus.configuration.log-impl=org.apache.ibatis.logging.stdout.StdOutImpl

@EnableDiscoveryClient//nacos第三步启动类加注解

对三个服务分别添加

访问本地的nacos http://localhost:8848/nacos/

以 service-student为例

@SpringBootApplication
@EnableDiscoveryClient//nacos第三步启动类加注解
@MapperScan(basePackages = {"com.ws.mapper"})
public class StudentApplication {
    public static void main(String[] args) {
        SpringApplication.run(StudentApplication.class,args);
    }
}

服务直接的接口调用

1.需要服务调用的依赖引入

引入依赖（只需引入一次依赖加在service文件下的pom文件里）

        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-openfeign</artifactId>
            <version>2.2.5.RELEASE</version>
        </dependency>

2.启动类添加注解

@EnableFeignClients//服务调用端启动类需要加

以service-teacher工程为例

@SpringBootApplication
@EnableDiscoveryClient//nacos第三步启动类加注解
@EnableFeignClients//服务调用端启动类需要加
@MapperScan(basePackages = {"com.ws.mapper"})
public class TeacherApplication {
    public static void main(String[] args) {
        SpringApplication.run(TeacherApplication.class,args);
    }
}

3.在调用端创建interface接口，使用注解调用指定服务名称，定义调用方法的路径

以service-teacher为例调用service-student中的方法

a.首先创建 StuClient 接口（查询老师信息的时候，同事查询出学生信息）

@Component
@FeignClient(name = "service-student",fallback = StuFeignClient.class)
public interface StuClient {

    //定义调用方法路径
    @GetMapping("student/queryAll")
    public List queryAllSchool();
}

b.实现查询老师信息的时候，同事查询出学生信息，如果调用service-student服务失败返回null

@Component
public class StuFeignClient implements StuClient {
    @Override
    public List queryAllSchool() {
        System.out.println("查询失败了 出错了！！！");
        return null;
    }
}

c.可以在service-teacher服务中调用service-student接口

附：

service下的pom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>
        <groupId>com.ws</groupId>
        <artifactId>springcloudnacos</artifactId>
        <version>2.2.10.RELEASE</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>



    <groupId>org.example</groupId>
    <artifactId>service</artifactId>
    <packaging>pom</packaging>
    <version>1.0-SNAPSHOT</version>
    <description>管理所有服务</description>
    <modules>
        <module>service-stu</module>
        <module>service-tea</module>
        <module>service-school</module>
    </modules>

    <dependencies>
<!--        nacos-->
        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-nacos-config</artifactId>
            <version>2.2.5.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
            <version>2.2.5.RELEASE</version>
        </dependency>
        <!--服务调用-->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-openfeign</artifactId>
            <version>2.2.5.RELEASE</version>
        </dependency>
<!--        nacos配置中心-->
        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-nacos-config</artifactId>
            <version>2.2.5.RELEASE</version>
        </dependency>
<!--        mybatis-plus-->
        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus-boot-starter</artifactId>
            <version>3.3.2</version>
        </dependency>
<!--        sql驱动-->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>8.0.27</version>
        </dependency>

    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <configuration>
                    <excludes>
                        <exclude>
                            <groupId>org.projectlombok</groupId>
                            <artifactId>lombok</artifactId>
                        </exclude>
                    </excludes>
                </configuration>
            </plugin>
        </plugins>
    </build>

</project>