手把手教你SpringCloud项目搭建

手把手教你搭建spring cloud项目

IDE开发工具：IntelliJ IDEA 14.0.2

版本管理：Maven

技术栈：spring cloud

环境：JDK 1.8

1.创建Maven项目

(1)文件->新建项目->maven，如图：

文件->新建项目

(2)填写模块名称和项目路径

按照以下步骤创建 Maven 项目。

这时候的项目不是spring boot项目!!

2.将maven项目转为spring boot项目

(1)pom.xml 引入所需的jar包

注：根据各项目实际情况，建筑业主为maven私人仓库

介绍SpringBoot所需的jar包

引入spring cloud需要的jar包

引入ereka服务注册发现客户端需要的jar包

介绍mybatis spring cloud 依赖的jar包

介绍kafka需要的jar包

引入redis需要的jar包

配置中心Spring config client的引入依赖jar包等，根据各个项目的需要。

<?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.**inks.e**s</groupId>
    <artifactId>msg</artifactId>
    <version>1.0-SNAPSHOT</version>
    <packaging>jar</packaging> 
    <name>msg</name>
    <description>Demo project for Spring Boot</description> 
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.5.6.RELEASE</version>
        <relativePath /> <!-- lookup parent from repository -->
    </parent> 
    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <java.version>1.8</java.version>
        <tomcat.version>8.5.30</tomcat.version>
    </properties> 
    <dependencies>
        <!--spring-cloud-config introduce -->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-config</artifactId>
        </dependency>
        <!--spring-cloud Monitoring function is introduced, which can be used to refresh configuration files dynamically -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-eureka</artifactId>
        </dependency>
        <!-- introduce feign rely on -->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-feign</artifactId>
        </dependency>
        <!-- kafka rely on -->
        <dependency>
            <groupId>org.springframework.kafka</groupId>
            <artifactId>spring-kafka</artifactId>
        </dependency>
        <!-- redis rely on -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-redis</artifactId>
        </dependency>
        <!-- Spring Boot -->
        <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>
        <!--mybatis to configure-->
        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
            <version>1.1.1</version>
        </dependency>
        <dependency>
            <groupId>org.mybatis.generator</groupId>
            <artifactId>mybatis-generator-core</artifactId>
            <version>1.3.2</version>
        </dependency>
        <dependency>
            <groupId>com.epaylinks.efps</groupId>
            <artifactId>common</artifactId>
            <version>0.0.1-SNAPSHOT</version>
        </dependency>
        <dependency>
            <groupId>com.epaylinks.efps</groupId>
            <artifactId>logtracer</artifactId>
            <version>0.0.1-SNAPSHOT</version>
        </dependency> 
        <dependency>
            <groupId>org.apache.commons</groupId>
            <artifactId>commons-math</artifactId>
            <version>2.2</version>
        </dependency>
        <dependency>
            <groupId>org.apache.httpcomponents</groupId>
            <artifactId>httpclient</artifactId>
            <version>4.5.3</version>
        </dependency>
        <dependency>
            <groupId>org.apache.httpcomponents</groupId>
            <artifactId>httpasyncclient</artifactId>
            <version>4.1.1</version>
        </dependency>
        <dependency>
            <groupId>io.github.openfeign.form</groupId>
            <artifactId>feign-form-spring</artifactId>
            <version>3.2.2</version>
        </dependency>
        <dependency>
            <groupId>io.github.openfeign.form</groupId>
            <artifactId>feign-form</artifactId>
            <version>3.2.2</version>
        </dependency>
    </dependencies>
    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>Dalston.SR2</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>
    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
            <plugin>
                <groupId>org.mybatis.generator</groupId>
                <artifactId>mybatis-generator-maven-plugin</artifactId>
                <version>1.3.2</version>
                <configuration>
                    <configurationFile>src/main/resources/generatorConfig-mch.xml</configurationFile>
                    <verbose>true</verbose>
                    <overwrite>true</overwrite>
                </configuration>
                <dependencies>
                    <dependency>
                        <groupId>com.oracle</groupId>
                        <artifactId>ojdbc6</artifactId>
                        <version>11.1.0.7.0</version>
                    </dependency>
                    <dependency>
                        <groupId>org.mybatis.generator</groupId>
                        <artifactId>mybatis-generator-core</artifactId>
                        <version>1.3.2</version>
                    </dependency>
                </dependencies>
            </plugin>
        </plugins>
    </build>
</project>

(2)创建spring cloud项目的主入口类** Application

package com.**s.**s;
import com.**ks.e**.common.util.SpringContextUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.web.client.RestTemplateBuilder;
import org.springframework.cloud.context.config.annotation.RefreshScope;
import org.springframework.cloud.netflix.eureka.EnableEurekaClient;
import org.springframework.cloud.netflix.feign.EnableFeignClients;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.EnableAspectJAutoProxy;
import org.springframework.kafka.annotation.EnableKafka;
import org.springframework.scheduling.annotation.EnableScheduling;
import org.springframework.web.client.RestTemplate; 
@RefreshScope
@EnableEurekaClient
@EnableFeignClients
@EnableKafka
@EnableScheduling
@EnableAspectJAutoProxy(proxyTargetClass=true , exposeProxy=true)
@SpringBootApplication
public class MsgApplication {
    // Note that since we inject RestTemplate into the controller, we need to instantiate an instance of this class at startup
    @Autowired
    private RestTemplateBuilder builder; 
        // Use RestTemplateBuilder to instantiate the RestTemplate object. spring has injected the RestTemplateBuilder instance by default
    @Bean
    public RestTemplate restTemplate() {
        return builder.build();
    } 
    public static void main(String[] args) {
        SpringApplication springApplication = new SpringApplication(MsgApplication.class);
        SpringContextUtils.setApplicationContext(springApplication.run(args));
    }
}

@SpringBootApplication的注解说明这个项目是一个SpringBoot项目，这个类是项目的主入口类。

使用以下主要方法启动应用程序

    public static void main(String[] args) {
        SpringApplication springApplication = new SpringApplication(MsgApplication.class);
        SpringContextUtils.setApplicationContext(springApplication.run(args));
    }

至此，spring boot项目已经完成了大半。接下来是配置数据库连接和registry config、ereka等配置文件

3.Registry和服务发现配置

(1)读取Spring Config Center配置项目的配置文件

楼主使用Spring Config Center作为配置中心，配置读取项目所需的各种连接和配置信息(Spring Config Center这里不再详细介绍)

(2)GitLab远程托管配置信息

Spring Config Center配置项目的连接和读取权限后，在gitlab上配置项目的各种需要的信息

在此处查看另一篇文章

spring cloud项目使用gitLab作为配置中心

(3)加载项目中各个环境对应的配置文件信息(dev、test、prod、uat)

以dev开发环境为例

按图标顺序加载

所有spring cloud项目都是从bootstrap.yml文件开始加载项目所需的各种连接和配置信息。这是spring cloud core自带的决定。可以研究源码，这里不详述。

4.bootstrap-dev.yml的配置如下：

spring:
  application:
    name: msg
  cloud:
    config:
      uri: http://172.20 *. 4 *. 80:9000 / ා configure the url of the spring cloud config server
      profile: dev                      # Specify profile
      label: master                     # Specify the branch of the gitlab repository

主要是连接spring cloud config server获取远程gitlab上的配置信息。

5.application-dev.yml的配置如下：

eureka:
  client:
    registerWithEureka: true
    service-url:
      defaultZone: http://172.20.4.80:8000/eureka/
swagger:
  enable: true

主要用于连接eureka服务注册和发现

至此，春关工程已基本完成。下一步就是为各种数据库建表，配置Mybatis，更新代码。