01_SpringCloud Alibaba环境搭建

SpringCloud Alibaba环境搭建

搭建分布式架构

1.新建springboot项目

父项目pom依赖加上

<packaging>pompackaging>
<properties>
    <java.version>1.8java.version>
properties>
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创建两个子项目

1.order

添加pom依赖

<dependencies>
    <dependency>
        <groupId>org.springframework.bootgroupId>
        <artifactId>spring-boot-starter-webartifactId>
    dependency>
dependencies>
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application.yml

server:
  port: 8080
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controller层

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;

@RestController
@RequestMapping("/order")
public class OrderController {
    @Autowired
    RestTemplate restTemplate;

    @RequestMapping("/add")
    public String add(){
        System.out.println("下单成功!");
        String msg = restTemplate.getForObject("http://localhost:8081/stock/reduct", String.class);
        return "hello world"+msg;
    }
}

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启动类

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


    @Bean
    public RestTemplate restTemplate(RestTemplateBuilder builder){
        RestTemplate restTemplate=builder.build();
        return  restTemplate;
    }
}

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2.stock

添加pom依赖

<dependencies>
    <dependency>
        <groupId>org.springframework.bootgroupId>
        <artifactId>spring-boot-starter-webartifactId>
    dependency>
dependencies>
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application.yml

server:
  port: 8081
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controller层

@RestController
@RequestMapping("/stock")
public class StockController {
    @RequestMapping("/reduct")
    public String reduct(){
        System.out.println("扣减库存");
        return "扣减库存";
    }
}

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启动类

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

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访问 http://localhost:8080/order/add

出现 hello world扣减库存

思考 String msg = restTemplate.getForObject(“http://localhost:8081/stock/reduct”, String.class);

需要维护ip地址 麻烦

SpringCloud Alibaba 环境搭建

版本对应很重要

Spring Cloud Alibaba:2.2.5.RELEASES

pring Boot :2.3.2.RELEASE

Spring Cloud:Hoxton.SR8

修改父工程的pom.xml

• 添加统一版本

<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>4.0.0modelVersion>
    <modules>
        <module>stockmodule>
        <module>ordermodule>
    modules>

    <groupId>com.tian.springcloudgroupId>
    <artifactId>springcloudalibabaartifactId>
    <version>0.0.1-SNAPSHOTversion>
    <name>springcloudalibabaname>
    <description>SpringCloud Alibabadescription>
    <packaging>pompackaging>
    <properties>
        <java.version>1.8java.version>
        <spring.cloud.alibaba.version>2.2.5.RELEASEspring.cloud.alibaba.version>
        <spring.boot.version>2.3.7.RELEASEspring.boot.version>
        <spring.cloud.version>Hoxton.SR8spring.cloud.version>
    properties>
    <dependencies>
        <dependency>
            <groupId>org.springframework.bootgroupId>
            <artifactId>spring-boot-starterartifactId>
        dependency>

        <dependency>
            <groupId>org.springframework.bootgroupId>
            <artifactId>spring-boot-starter-testartifactId>
            <scope>testscope>
        dependency>
    dependencies>

    <dependencyManagement>

        <dependencies>
            <dependency>
                <groupId>com.alibaba.cloudgroupId>
                <artifactId>spring-cloud-alibaba-dependenciesartifactId>
                <version>${spring.cloud.alibaba.version}version>
                <type>pomtype>
                <scope>importscope>
            dependency>

            <dependency>
                <groupId>org.springframework.bootgroupId>
                <artifactId>spring-boot-starter-parentartifactId>
                <version>${spring.boot.version}version>
                <type>pomtype>
                <scope>importscope>
            dependency>

            <dependency>
                <groupId>org.springframework.cloudgroupId>
                <artifactId>spring-cloud-dependenciesartifactId>
                <version>${spring.cloud.version}version>
                <type>pomtype>
                <scope>importscope>
            dependency>
        dependencies>
    dependencyManagement>

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

project>

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