从0到一创建springcloudalibaba项目

本次使用的是cloudalibaba2.2.6，算是比较稳定的版本，springboot3需要jdk17 这个版本的jdk可能会收费所以还是用jdk8了

 

创建项目：

1 

 2 

项目创建完成就只有一个pom.xml文件 具体的配置我就不细致的说明了 大概的提一下

<?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>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.2.6.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.example</groupId>
    <artifactId>demo</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>demo</name>
    <description>Demo project for Spring Boot</description>
    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <maven.compiler.source>1.8</maven.compiler.source>
        <maven.compiler.target>1.8</maven.compiler.target>
        <java.version>8</java.version>
        <!-- Spring Cloud -->
        <spring.cloud.version>Hoxton.SR12</spring.cloud.version>

        <!-- Spring Boot -->
        <spring-boot.version>2.3.12.RELEASE</spring-boot.version>
        <!-- Spring Cloud alibaba -->
        <project.version>2.2.9.RELEASE</project.version>
    </properties>
    <dependencies>
        <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>
        </dependency>
    </dependencies>

    <dependencyManagement>
        <dependencies>

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

            <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>com.alibaba.cloud</groupId>
                <artifactId>spring-cloud-alibaba-dependencies</artifactId>
                <version>2.2.9.RELEASE</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>

        </dependencies>
    </dependencyManagement>

    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
            </plugin>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

需要注意的就是 

<!-- Spring Cloud -->
<spring.cloud.version>Hoxton.SR12</spring.cloud.version>
<!-- Spring Boot -->
<spring-boot.version>2.3.12.RELEASE</spring-boot.version>
<!-- Spring Cloud alibaba -->
<project.version>2.2.9.RELEASE</project.version>
这三个版本需要对应起来，要不然创建的项目会有问题 版本不兼容具体的对应版本可以查看spring的官网
贴一个别人写的文章也说的很清楚 Spring Boot、Spring Cloud与Spring Cloud Alibaba版本对应关系-阿里云开发者社区

到此基础的项目工程就创建完成了

在项目中创建模块：

选择工程名右键 -new - module

 type 要选择maven

 创建完成后目录的样子

 修改test1模块的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>
    <parent>
        <groupId>com.example</groupId>
        <artifactId>demo</artifactId>
        <version>0.0.1-SNAPSHOT</version>
    </parent>
    <artifactId>test1</artifactId>
    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <maven.compiler.source>1.8</maven.compiler.source>
        <maven.compiler.target>1.8</maven.compiler.target>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

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

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

创建一个controller类

package com.example.demo.controller;

import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import java.util.HashMap;
import java.util.Map;

@RequestMapping("/user")
@RestController
public class UserController {

    @RequestMapping("/getUser")
    public Map getUser() {
        HashMap<String, String> map = new HashMap<>();
        map.put("name","zhangsan");
        map.put("addr","武汉市");

        return map;
    }
}

把项目build一下看看能不能启动

 项目正常启动，访问一下接口

 到此基于项目创建模块也是没有问题的

后续就是整合cloudAlibaba相关的组件了

nacos

怎么安装这里就不多说了 请看 Docker安装nacos（图文并茂，避免踩坑，一步到位）_docker安装nacos挂载-CSDN博客

本次用的nacos2.1.0说明一下 cloud的这些组件也是需要对应版本的要不然整合起开会有很多问题

本地启动一下nacos

 下面是组件整合

test1模块引入：
<!--naocs客户端依赖-->
<dependency>
    <groupId>com.alibaba.cloud</groupId>
    <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
</dependency>

application.yml 整体的配置如下：

server:
  port: 8080
spring:
  application:
    name: test1
  cloud:
    nacos:
      discovery:
        server-addr: 127.0.0.1:8848 #注册中心地址
        namespace: public # 命名空间 public是默认的

management:
  endpoints:
    web:
      exposure:
        include: "*"

 

启动一下项目看一下

登录nacos看看 服务是否注册完成

http://localhost:8848/nacos

 

 

到此项目整合nacos也完成了
后续再写 openFegen sentinel getaway seata