SpringCloud和SpringBoot的关系
SpringBoot专注于快速、方便地开发单个个体微服务,SpringCloud关注全局的治理框架,它将SpringBoot开发的一个个单体微服务整合并管理起来,为各个微服务之间提供:管理配置、服务发现、断路器、路由、微代理、事件总线、全局锁、决策竞选、分布式会话等等集成服务
SpringCloud
SpringCloud和Dubbo的最大区别:SpringCloud抛弃了Dubbo的RPC通信,采用的是基于HTTP的REST方式
自学网站
Spring Cloud Netfix:Spring Cloud Netflix【spring cloud中文版】--spring cloud中文文档
中文API文档:Spring Cloud Dalston 中文文档 参考手册 中文版
SpringCloud中国社区:Spring Cloud中国社区
SpringCloud中文网:Spring Cloud中文网-官方文档中文版
SpringCloud版本选择
版本说明
实际开发版本关系
创建父工程
创建一个maven工程,去掉src目录
配置pom.xml
4.0.0
org.example
SpringCloud
1.0-SNAPSHOT
pom
UTF-8
1.8
1.8
4.12
1.2.17
1.16.18
org.springframework.cloud
spring-cloud-dependencies
Greenwich.SR1
pom
import
org.springframework.boot
spring-boot-dependencies
2.1.4.RELEASE
pom
import
mysql
mysql-connector-java
5.1.47
com.alibaba
druid
1.1.10
org.mybatis.spring.boot
mybatis-spring-boot-starter
1.3.2
ch.qos.logback
logback-core
1.2.3
junit
junit
${junit.version}
log4j
log4j
${log4j.version}
org.projectlombok
lombok
${lombok.version}
服务提供者
一、创建子module1(springcloud-api)
1、创建数据库
create database db01
use db01
create table dept(
deptno int primary key not null auto_increment,
dname varchar(20),
db_source varchar(20)
)
insert into dept(dname,db_source) values('开发部',DATABASE());
insert into dept(dname,db_source) values('销售部',DATABASE());
insert into dept(dname,db_source) values('运维部',DATABASE());
insert into dept(dname,db_source) values('测试部',DATABASE());
insert into dept(dname,db_source) values('财务部',DATABASE());
2、创建实体类
@Data
@NoArgsConstructor
@Accessors(chain = true) //链式写法
public class Dept implements Serializable {
private Integer deptno;
private String dname;
//表示这个数据是存在哪个数据库的字段
//微服务:一个服务对应一个数据库,同一个信息可能存在不同的数据库
private String dbSource;
public Dept(String dname) {
this.dname = dname;
}
}
二、创建子模块2(springcloud-provider-dept-8081)
1、pom.xml
SpringCloud
org.example
1.0-SNAPSHOT
4.0.0
springcloud-provider-dept-8001
org.example
springcloud-api
1.0-SNAPSHOT
junit
junit
test
mysql
mysql-connector-java
com.alibaba
druid
ch.qos.logback
logback-core
org.mybatis.spring.boot
mybatis-spring-boot-starter
org.springframework.boot
spring-boot-test
org.springframework.boot
spring-boot-starter-web
org.springframework.boot
spring-boot-starter-jetty
org.springframework.boot
spring-boot-devtools
org.example
springcloud-api
1.0-SNAPSHOT
compile
2、Dao
①DeptDao
@Mapper
@Repository
public interface DeptDao {
public Integer addDept(Dept dept);
public Dept queryById(Integer deptno);
public List queryAll();
}
②DeptMapper.xml
insert into dept(dname, db_source) values(#{dname}, DATABASE())
3、application.xml
server:
port: 8001
#mybatis配置
mybatis:
type-aliases-package: com.springcloud.pojo
mapper-locations: classpath:mybatis/mapper/*.xml
#spring配置
spring:
application:
name: springcloud-provider-dept
datasource:
type: com.alibaba.druid.pool.DruidDataSource
drive-class-name: org.gjt.mm.mysql.Driver
url: jdbc:mysql://localhost:3306/db01?useSSL=false&useUnicode=true&characterEncoding=UTF-8&serverTimezone=GMT%2B8
username: root
password: 666666QIU
4、service
①DeptService
public interface DeptService {
public Integer addDept(Dept dept);
public Dept queryById(Integer deptno);
public List queryAll();
}
②DeptServiceImpl
@Service
public class DeptServiceImpl implements DeptService {
@Autowired
private DeptDao deptDao;
@Override
public Integer addDept(Dept dept) {
return deptDao.addDept(dept);
}
@Override
public Dept queryById(Integer deptno) {
return deptDao.queryById(deptno);
}
@Override
public List queryAll() {
return deptDao.queryAll();
}
}
5、controller
@RestController
public class DeptController {
@Autowired
private DeptService deptService;
@PostMapping("/dept/add")
public Integer addDept(Dept dept){
return deptService.addDept(dept);
}
@GetMapping("/dept/get/{deptno}")
public Dept queryById(@PathVariable("deptno") Integer deptno){
return deptService.queryById(deptno);
}
@GetMapping("/dept/list")
public List queryAll(){
return deptService.queryAll();
}
}
6、主启动类
//启动类
@SpringBootApplication
public class DeptProvider_8001 {
public static void main(String[] args){
SpringApplication.run(DeptProvider_8001.class,args);
}
}
服务消费者
三、创建子模块3(springcloud-consumer-dept-80)
1、pom.xml
SpringCloud
org.example
1.0-SNAPSHOT
4.0.0
springcloud-consumer-dept-80
org.example
springcloud-api
1.0-SNAPSHOT
org.springframework.boot
spring-boot-starter-web
org.springframework.boot
spring-boot-devtools
2、 application.xml
server:
port: 8080
3、ConfigBean(用来注册RestTemplate的Bean)
@Configuration
public class ConfigBean {
@Bean
public RestTemplate getRestTemplate(){
return new RestTemplate();
}
}
4、controller
@RestController
public class DeptConsumerController {
//理解:消费者,不应该有service
@Autowired
private RestTemplate restTemplate; //提供多种便捷访问远程http服务的方法,简单的Restful服务模板
private static final String REST_URL_PREFIX = "http://localhost:8001";
@RequestMapping("/consumer/dept/add")
public Integer addDept(Dept dept){
return restTemplate.postForObject(REST_URL_PREFIX+"/dept/add", dept,Integer.class);
}
@RequestMapping("/consumer/dept/get/{deptno}")
public Dept queryById(@PathVariable("deptno") Integer deptno){
return restTemplate.getForObject(REST_URL_PREFIX + "/dept/get/" + deptno, Dept.class);
}
@RequestMapping("/consumer/dept/list")
public List list(){
return restTemplate.getForObject(REST_URL_PREFIX + "/dept/list", List.class);
}
}