本案例为一个大项目下的几个模块,父项目只负责管理依赖版本控制
注意使用pom方式打包
<groupId>ganxie.xiaowen.cloudgroupId>
<artifactId>springcloudartifactId>
<version>1.0-SNAPSHOTversion>
<packaging>pompackaging>
<modules>
<module>cloud-provider-payment8001module>
<module>cloud-consumer-order80module>
<module>cloud-api-commonsmodule>
<module>cloud-eureka-server7001module>
<module>cloud-eureka-server7002module>
<module>cloud-provider-payment8002module>
modules>
<properties>
<project.build.sourceEncoding>UTF-8project.build.sourceEncoding>
<maven.compiler.source>1.8maven.compiler.source>
<maven.compiler.target>1.8maven.compiler.target>
<junit.version>4.12junit.version>
<log4j.version>1.2.17log4j.version>
<lombok.version>1.16.18lombok.version>
<mysql.version>8.0.17mysql.version>
<druid.version>1.1.16druid.version>
<mybatis.spring.boot.version>1.3.0mybatis.spring.boot.version>
properties>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.apache.maven.pluginsgroupId>
<artifactId>maven-project-info-reports-pluginartifactId>
<version>3.0.0version>
dependency>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-bootartifactId>
<version>2.2.2.RELEASEversion>
<type>pomtype>
<scope>importscope>
dependency>
<dependency>
<groupId>org.springframework.cloudgroupId>
<artifactId>spring-cloud-dependenciesartifactId>
<version>Hoxton.SR1version>
<type>pomtype>
<scope>importscope>
dependency>
<dependency>
<groupId>com.alibaba.cloudgroupId>
<artifactId>spring-cloud-alibaba-dependenciesartifactId>
<version>2.1.0.RELEASEversion>
<type>pomtype>
<scope>importscope>
dependency>
<dependency>
<groupId>mysqlgroupId>
<artifactId>mysql-connector-javaartifactId>
<version>${mysql.version}version>
<scope>runtimescope>
dependency>
<dependency>
<groupId>com.alibabagroupId>
<artifactId>druidartifactId>
<version>${druid.version}version>
dependency>
<dependency>
<groupId>org.mybatis.spring.bootgroupId>
<artifactId>mybatis-spring-boot-starterartifactId>
<version>${mybatis.spring.boot.version}version>
dependency>
<dependency>
<groupId>junitgroupId>
<artifactId>junitartifactId>
<version>${junit.version}version>
dependency>
<dependency>
<groupId>log4jgroupId>
<artifactId>log4jartifactId>
<version>${log4j.version}version>
dependency>
dependencies>
dependencyManagement>
入门案例分为四个模块,Eureka注册中心,服务提供者,服务消费者,公共资源模块,其中注册中心分别使用7001,7002端口模拟集群,服务提供者使用8001,8002端口模拟集群
把服务提供者和服务消费者中相同的实体类提出到一个独立的模块,并分别引入pom依赖即可
<dependencies>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-devtoolsartifactId>
<scope>runtimescope>
<optional>trueoptional>
dependency>
<dependency>
<groupId>org.projectlombokgroupId>
<artifactId>lombokartifactId>
<optional>trueoptional>
dependency>
<dependency>
<groupId>cn.hutoolgroupId>
<artifactId>hutool-allartifactId>
<version>5.1.0version>
dependency>
dependencies>
@Data
@AllArgsConstructor
@NoArgsConstructor
public class CommonResult<T> {
private Integer code;
private String message;
private T data;
public CommonResult(Integer code, String message) {
this.code = code;
this.message = message;
}
}
@Data
@AllArgsConstructor
@NoArgsConstructor
public class Payment implements Serializable {
private Long id;
private String serial;
}
在末尾添加
127.0.0.1 eureka7001
127.0.0.1 eureka7002
<dependencies>
<dependency>
<groupId>org.springframework.cloudgroupId>
<artifactId>spring-cloud-starter-netflix-eureka-serverartifactId>
dependency>
<dependency>
<groupId>ganxie.xiaowen.cloudgroupId>
<artifactId>cloud-api-commonsartifactId>
<version>1.0-SNAPSHOTversion>
dependency>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-webartifactId>
dependency>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-actuatorartifactId>
dependency>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-devtoolsartifactId>
<scope>runtimescope>
<optional>trueoptional>
dependency>
<dependency>
<groupId>org.projectlombokgroupId>
<artifactId>lombokartifactId>
dependency>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-testartifactId>
<scope>testscope>
dependency>
<dependency>
<groupId>junitgroupId>
<artifactId>junitartifactId>
dependency>
dependencies>
server:
port: 7001
eureka:
instance:
hostname: eureka7001 #eureka服务端的实例名字
client:
register-with-eureka: false #表识不向注册中心注册自己
fetch-registry: false #表示自己就是注册中心,职责是维护服务实例,并不需要去检索服务
service-url:
#设置与eureka server交互的地址查询服务和注册服务都需要依赖这个地址
defaultZone: http://eureka7002:7002/eureka/
#server:
#关闭自我保护机制
#enable-self-preservation: false
#eviction-interval-timer-in-ms: 2000
@SpringBootApplication
@EnableEurekaServer
public class Eureka7001 {
public static void main(String[] args) {
SpringApplication.run(Eureka7001.class,args);
}
}
server:
port: 7002
eureka:
instance:
hostname: eureka7002 #eureka服务端的实例名字
client:
register-with-eureka: false #表识不向注册中心注册自己
fetch-registry: false #表示自己就是注册中心,职责是维护服务实例,并不需要去检索服务
service-url:
#设置与eureka server交互的地址查询服务和注册服务都需要依赖这个地址
defaultZone: http://eureka7001:7001/eureka/
#server:
#关闭自我保护机制
#enable-self-preservation: false
#eviction-interval-timer-in-ms: 2000
<dependencies>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-webartifactId>
dependency>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-actuatorartifactId>
dependency>
<dependency>
<groupId>org.mybatis.spring.bootgroupId>
<artifactId>mybatis-spring-boot-starterartifactId>
dependency>
<dependency>
<groupId>com.alibabagroupId>
<artifactId>druid-spring-boot-starterartifactId>
<version>1.1.10version>
dependency>
<dependency>
<groupId>mysqlgroupId>
<artifactId>mysql-connector-javaartifactId>
dependency>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-jdbcartifactId>
dependency>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-devtoolsartifactId>
<scope>runtimescope>
<optional>trueoptional>
dependency>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-testartifactId>
<scope>testscope>
dependency>
<dependency>
<groupId>org.projectlombokgroupId>
<artifactId>lombokartifactId>
<version>1.18.12version>
dependency>
<dependency>
<groupId>ganxie.xiaowen.cloudgroupId>
<artifactId>cloud-api-commonsartifactId>
<version>1.0-SNAPSHOTversion>
dependency>
<dependency>
<groupId>org.springframework.cloudgroupId>
<artifactId>spring-cloud-starter-netflix-eureka-clientartifactId>
dependency>
dependencies>
server:
port: 8001
spring:
application:
name: cloud-provider-payment #三个服务名称一致
datasource:
type: com.alibaba.druid.pool.DruidDataSource
driver-class-name: com.mysql.cj.jdbc.Driver
url: jdbc:mysql:///cloud2020?serverTimezone=UTC&useUnicode=true&characterEncoding=utf-8&userSSL=false
username: root
password: 1234
mybatis:
type-aliases-package: ganxie.xiaowen.entity
mapper-locations: classpath:mybatis/mapper/*.xml
eureka:
client:
#是否将自己注册金EurekaServer,默认是true
register-with-eureka: true
#是否从EurekaServer抓取已有的注册信息,默认为true。单节点无所谓,集群必须设置为true才能配合ribbon使用负载均衡
fetch-registry: true
service-url:
defaultZone: http://eureka7001:7001/eureka/,http://eureka7002:7002/eureka/
instance:
instance-id: cloud-provider-payment8001
prefer-ip-address: true
#Eureka客户端想服务端发送心跳的时间间隔(默认三十秒)
#lease-renewal-interval-in-seconds: 1
#Eureka服务端在收到最后一次心跳后等待时间上线,单位为秒(默认是九十秒),超时将剔除服务
#lease-expiration-duration-in-seconds: 2
注意这里的注解是@EnableEurekaClient
@SpringBootApplication
@EnableEurekaClient
@EnableDiscoveryClient
public class Payment8001 {
public static void main(String[] args) {
SpringApplication.run(Payment8001.class,args);
}
}
dao层和service层只是普通增查操作,不做演示
使用DiscoveryClient需要在主启动类上配置@EnableDiscoveryClient
@RestController
@Slf4j
public class PaymentController {
@Resource
private PaymentService paymentService;
@Resource
private DiscoveryClient discoveryClient;
@Value("${server.port}")
private String serverPort;
@PostMapping("/payment")
public CommonResult create(@RequestBody Payment payment){
int result = paymentService.create(payment);
log.info("******插入结果:"+result);
if (result>0) {
return new CommonResult(200,"插入数据库成功,serverPort="+serverPort,result);
}
return new CommonResult(444,"插入数据库失败",null);
}
@GetMapping("/payment/{id}")
public CommonResult selectById(@PathVariable("id") Long id){
Payment payment = paymentService.selectPaymentById(id);
log.info("******查询结果:"+payment);
if (payment != null) {
return new CommonResult(200,"查询成功,serverPort="+serverPort,payment);
}
return new CommonResult(444,"没有对应记录",null);
}
@GetMapping("/payment/discovery")
public Object discoveryClient(){
List<String> services = discoveryClient.getServices();
for (String service : services) {
log.info("*********service:"+service);
}
List<ServiceInstance> instances = discoveryClient.getInstances("CLOUD-PROVIDER-PAYMENT");
for (ServiceInstance instance : instances) {
log.info(instance.getServiceId()+"\t"+
instance.getHost()+"\t"+
instance.getPort()+"\t"+
instance.getUri());
}
return discoveryClient;
}
}
除配置文件中端口为8002外完全同上
<dependencies>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-webartifactId>
dependency>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-actuatorartifactId>
dependency>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-devtoolsartifactId>
<scope>runtimescope>
<optional>trueoptional>
dependency>
<dependency>
<groupId>org.projectlombokgroupId>
<artifactId>lombokartifactId>
<optional>trueoptional>
dependency>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-testartifactId>
<scope>testscope>
dependency>
<dependency>
<groupId>ganxie.xiaowen.cloudgroupId>
<artifactId>cloud-api-commonsartifactId>
<version>1.0-SNAPSHOTversion>
dependency>
<dependency>
<groupId>org.springframework.cloudgroupId>
<artifactId>spring-cloud-starter-netflix-eureka-clientartifactId>
dependency>
dependencies>
server:
port: 80
spring:
application:
name: cloud-order-service
eureka:
client:
#是否将自己注册金EurekaServer,默认是true,也可以不注册
register-with-eureka: true
#是否从EurekaServer抓取已有的注册信息,默认为true。单节点无所谓,集群必须设置为true才能配合ribbon使用负载均衡
fetch-registry: true
service-url:
defaultZone: http://eureka7001:7001/eureka/,http://eureka7002:7002/eureka/
@SpringBootApplication
@EnableEurekaClient
public class Order80 {
public static void main(String[] args) {
SpringApplication.run(Order80.class,args);
}
}
需要往容器中注入RestTemplate
@LoadBalanced 赋予restTemplate负载均衡的能力,默认算法为轮询算法,也可以自定义,接口为IRule
@Configuration
public class ApplicationContextConfig {
@Bean
@LoadBalanced //赋予restTemplate负载均衡的能力
public RestTemplate myRestTemplate(){
return new RestTemplate();
}
}
@RestController
@Slf4j
public class OrderController {
// private static final String PAYMENT_URL = "http://localhost:8001";
private static final String PAYMENT_URL = "http://cloud-provider-payment";//服务提供者的spring.application.name
@Resource
private RestTemplate restTemplate;
@GetMapping("/consumer/payment/create")
public CommonResult<Payment> create(Payment payment){
return restTemplate.postForObject(PAYMENT_URL+"/payment",payment, CommonResult.class);
}
@GetMapping("consumer/payment/{id}")
public CommonResult<Payment> selectPaymentById(@PathVariable("id") Long id){
return restTemplate.getForObject(PAYMENT_URL+"/payment/"+id,CommonResult.class);
}
}
<dependencies>
<dependency>
<groupId>ganxie.xiaowen.cloudgroupId>
<artifactId>cloud-api-commonsartifactId>
<version>1.0-SNAPSHOTversion>
dependency>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-webartifactId>
dependency>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-actuatorartifactId>
dependency>
<dependency>
<groupId>org.springframework.cloudgroupId>
<artifactId>spring-cloud-starter-zookeeper-discoveryartifactId>
<exclusions>
<exclusion>
<groupId>org.apache.zookeepergroupId>
<artifactId>zookeeperartifactId>
exclusion>
exclusions>
dependency>
<dependency>
<groupId>org.apache.zookeepergroupId>
<artifactId>zookeeperartifactId>
<version>3.4.14version>
dependency>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-devtoolsartifactId>
<scope>runtimescope>
<optional>trueoptional>
dependency>
<dependency>
<groupId>org.projectlombokgroupId>
<artifactId>lombokartifactId>
<optional>trueoptional>
dependency>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-testartifactId>
<scope>testscope>
dependency>
dependencies>
server:
port: 8004
spring:
application:
name: cloud-provider-payment #三个服务名称一致
cloud:
zookeeper:
connect-string: 192.168.188.172:2181
@SpringBootApplication
@EnableDiscoveryClient //该注解用与向使用consul或者zookeeper作为注册中心时注册服务
public class Payment8004 {
public static void main(String[] args) {
SpringApplication.run(Payment8004.class,args);
}
}
<dependencies>
<dependency>
<groupId>ganxie.xiaowen.cloudgroupId>
<artifactId>cloud-api-commonsartifactId>
<version>1.0-SNAPSHOTversion>
dependency>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-webartifactId>
dependency>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-actuatorartifactId>
dependency>
<dependency>
<groupId>org.springframework.cloudgroupId>
<artifactId>spring-cloud-starter-zookeeper-discoveryartifactId>
<exclusions>
<exclusion>
<groupId>org.apache.zookeepergroupId>
<artifactId>zookeeperartifactId>
exclusion>
exclusions>
dependency>
<dependency>
<groupId>org.apache.zookeepergroupId>
<artifactId>zookeeperartifactId>
<version>3.4.14version>
dependency>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-devtoolsartifactId>
<scope>runtimescope>
<optional>trueoptional>
dependency>
<dependency>
<groupId>org.projectlombokgroupId>
<artifactId>lombokartifactId>
<optional>trueoptional>
dependency>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-testartifactId>
<scope>testscope>
dependency>
dependencies>
server:
port: 80
spring:
application:
name: cloud-consumer-order #三个服务名称一致
cloud:
zookeeper:
connect-string: 192.168.188.172:2181
@SpringBootApplication
@EnableDiscoveryClient
public class ZkOrder80 {
public static void main(String[] args) {
SpringApplication.run(ZkOrder80.class,args);
}
}
<dependencies>
<dependency>
<groupId>org.springframework.cloudgroupId>
<artifactId>spring-cloud-starter-consul-discoveryartifactId>
dependency>
<dependency>
<groupId>ganxie.xiaowen.cloudgroupId>
<artifactId>cloud-api-commonsartifactId>
<version>1.0-SNAPSHOTversion>
dependency>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-webartifactId>
dependency>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-actuatorartifactId>
dependency>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-devtoolsartifactId>
<scope>runtimescope>
<optional>trueoptional>
dependency>
<dependency>
<groupId>org.projectlombokgroupId>
<artifactId>lombokartifactId>
<optional>trueoptional>
dependency>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-testartifactId>
<scope>testscope>
dependency>
dependencies>
server:
port: 8006
spring:
application:
name: cloud-provider-payment #三个服务名称一致
cloud:
consul:
host: localhost
port: 8500
discovery:
service-name: ${
spring.application.name}
@SpringBootApplication
@EnableDiscoveryClient
public class Payment8006 {
public static void main(String[] args) {
SpringApplication.run(Payment8006.class,args);
}
}
<dependencies>
<dependency>
<groupId>org.springframework.cloudgroupId>
<artifactId>spring-cloud-starter-consul-discoveryartifactId>
dependency>
<dependency>
<groupId>ganxie.xiaowen.cloudgroupId>
<artifactId>cloud-api-commonsartifactId>
<version>1.0-SNAPSHOTversion>
dependency>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-webartifactId>
dependency>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-actuatorartifactId>
dependency>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-devtoolsartifactId>
<scope>runtimescope>
<optional>trueoptional>
dependency>
<dependency>
<groupId>org.projectlombokgroupId>
<artifactId>lombokartifactId>
<optional>trueoptional>
dependency>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-testartifactId>
<scope>testscope>
dependency>
dependencies>
server:
port: 80
spring:
application:
name: cloud-consumer-order #三个服务名称一致
cloud:
consul:
host: localhost
port: 8500
discovery:
service-name: ${
spring.application.name}
@SpringBootApplication
@EnableDiscoveryClient
public class Consul80 {
public static void main(String[] args) {
SpringApplication.run(Consul80.class,args);
}
}