springcloud快速入门

一、项目思路

1. 使用idea工具创建一个maven空项目，删除不需要的src目录等东西，用来做父项目，只剩下pom.xml文件
2. 在父项目中依次创建三个模块module，分别为eruekaservice、provide、consumer三个子项目（springboot项目）。
3. 在erueka中添加配置信息、在启动类上添加@EnableEurekaServer注解。
4. 在provide中添加配置信息、在启动类上添加@EnableEurekaClient注解（consumer的步骤相同）。
5. 在provide子项目中创建entity实体类、DAO层、service层、controller层，此处使用mybatis连接数据库、Druid连接池来连接MySQL（DataSource配置略）。
6. 在consumer子项目中创建controller层，使用restTemplate来访问provide中的api（消费者controller的接口）。
7. 项目运行顺序，erueka>provide>comsumer。

二、实现步骤

1、创建maven空项目

删除不需要的目录和文件

2、创建erueka-service

选择需要导入的模块（依赖）

java;gutter:true; 4.0.0 com.yiblue eureka-server 0.0.1-SNAPSHOT eureka-server eureka-server</p> <pre><code> 1.8 UTF-8 UTF-8 2.3.7.RELEASE Hoxton.SR9 org.springframework.cloud spring-cloud-starter-netflix-eureka-server org.springframework.boot spring-boot-starter-test test org.junit.vintage junit-vintage-engine org.springframework.cloud spring-cloud-dependencies ${spring-cloud.version} pom import org.springframework.boot spring-boot-dependencies ${spring-boot.version} pom import //编译插件 org.apache.maven.plugins maven-compiler-plugin 3.8.1 1.8 1.8 UTF-8 //maven插件 org.springframework.boot spring-boot-maven-plugin 2.3.7.RELEASE com.yiblue.eurekaserver.EurekaServerApplication repackage repackage </code></pre> <pre><code> 修改配置文件application.yml ;gutter:true;
server:
port: 8080
spring:
application:
name: eureka-server
eureka:
instance:
hostname: localhost
client:
register-with-eureka: false
fetch-registry: false
service-url:
defaultZone: http://${eureka.instance.hostname}:${server.port}/eureka/

在启动类EurekaServerApplication 上添加注解：@EnableEurekaServer

java;gutter:true; @SpringBootApplication @EnableEurekaServer public class EurekaServerApplication { public static void main(String[] args) { SpringApplication.run(EurekaServerApplication.class, args); } }</p> <pre><code> 3、创建provider项目（与erueka一样，这省略） pom.xml依赖导入 ;gutter:true;
4.0.0
com.yiblue
provider-8001
0.0.1-SNAPSHOT
provider-8001
provider-8001

1.8
UTF-8
UTF-8
2.3.7.RELEASE
Hoxton.SR9

org.springframework.cloud
spring-cloud-starter-netflix-eureka-client

org.springframework.boot
spring-boot-starter-web

org.mybatis.spring.boot
mybatis-spring-boot-starter
2.1.4

org.springframework.boot
spring-boot-devtools
runtime
true

mysql
mysql-connector-java
runtime

org.projectlombok
lombok
true

org.springframework.boot
spring-boot-starter-test
test

org.junit.vintage
junit-vintage-engine

com.alibaba
druid
1.1.17

org.springframework.cloud
spring-cloud-dependencies
${spring-cloud.version}
pom
import

org.springframework.boot
spring-boot-dependencies
${spring-boot.version}
pom
import

org.apache.maven.plugins
maven-compiler-plugin
3.8.1

1.8
1.8
UTF-8

org.springframework.boot
spring-boot-maven-plugin
2.3.7.RELEASE

com.yiblue.provider8001.Provider8001Application

repackage

repackage

application.yml修改配置（provider），配置mybatis连接MySQL信息

spring:  datasource:    type: com.alibaba.druid.pool.DruidDataSource    driver-class-name: com.mysql.cj.jdbc.Driver    url: jdbc:mysql://localhost:3306/shiro?serverTimezone=UTC&useUnicode=true&characterEncoding=utf8    username: caidongji    password: abc123  application:    name: provider-8001eureka:  client:    service-url:      defaultZone: http://localhost:8080/eureka/server:  port: 8001mybatis:  type-aliases-package: com.yiblue.provider8001.entity  mapper-locations: classpath:mappers/*xml

在启动类Provider8001Application上添加注解@EnableEurekaClient

java;gutter:true; @SpringBootApplication @EnableEurekaClient public class Provider8001Application { public static void main(String[] args) { SpringApplication.run(Provider8001Application.class, args); } }</p> <pre><code> 编写实体类 ;gutter:true;
@Data
@AllArgsConstructor
@NoArgsConstructor
public class ShiroUser {
private Integer uid;
private String uname;
private String password;
private String datasource;
}

编写接口（这里省略dao，合并到service中了）

java;gutter:true; @Mapper @Repository public interface ShiroUserService { @Select("select * from usershiro") public List selectAll();</p> <pre><code>@Select("select * from usershiro where uname=#{uname}") public ShiroUser selectOne(String uname); @Select("insert into usershiro (uname,password,datasource) values (#{uname},#{password},#{datasource})") void insertOne(ShiroUser shiroUser); @Select("delete from usershiro where uname=#{uname}") void deleteOne(String uname); </code></pre> <p>}</p> <pre><code> 编写controller ;gutter:true;
@RestController
public class ShiroUserController {
@Autowired
ShiroUserService shiroUserService;

@GetMapping("/getAll")
public List getAll(){
return shiroUserService.selectAll();
}
@GetMapping("/getOne")
public ShiroUser getOne(String uname){ return shiroUserService.selectOne(uname);}
}

4、创建comsumer项目（与erueka一样，这省略）

配置依赖，pom.xml

java;gutter:true; 4.0.0 com.yiblue eureka-server 0.0.1-SNAPSHOT eureka-server eureka-server</p> <pre><code> 1.8 UTF-8 UTF-8 2.3.7.RELEASE Hoxton.SR9 org.springframework.cloud spring-cloud-starter-netflix-eureka-server org.springframework.boot spring-boot-starter-test test org.junit.vintage junit-vintage-engine org.springframework.cloud spring-cloud-dependencies ${spring-cloud.version} pom import org.springframework.boot spring-boot-dependencies ${spring-boot.version} pom import org.apache.maven.plugins maven-compiler-plugin 3.8.1 1.8 1.8 UTF-8 org.springframework.boot spring-boot-maven-plugin 2.3.7.RELEASE com.yiblue.eurekaserver.EurekaServerApplication repackage repackage </code></pre> <pre><code> 修改application.yml文件 ;gutter:true;
server:
port: 8080
spring:
application:
name: eureka-server
eureka:
instance:
hostname: localhost
client:
register-with-eureka: false
fetch-registry: false
service-url:
defaultZone: http://${eureka.instance.hostname}:${server.port}/eureka/

在启动类Consumer8002Application上添加注解

java;gutter:true; @SpringBootApplication @EnableEurekaClient public class Consumer8002Application { public static void main(String[] args) { SpringApplication.run(Consumer8002Application.class, args); } }</p> <pre><code> spring不会自动装配restTemplate，需要配置类注入容器中 ;gutter:true;
@Configuration
public class restTemplateconfig {

@Bean
// @LoadBalanced
RestTemplate restTemplate(){ return new RestTemplate();}
}

创建controller类，调用提供者的api

java;gutter:true; @RestController public class ShiroUserController { @Resource RestTemplate restTemplate;</p> <pre><code>@GetMapping("/findAll") public List findAll(){ return restTemplate.getForObject("http://localhost:8001/getAll", List.class); } </code></pre> <p>}

5、项目运行顺序：erueka>provider>consumer

在浏览器中访问：localhost:8002/findAll

6、end

Original: https://www.cnblogs.com/yiblue/p/16726914.html
Author: 一个不会玩的狗子
Title: springcloud快速入门