文章目录
1.先在服务器上开启Zookeeper
这里必须要记住服务器上的Zookeeper的版本号，3.4.11。后面要用到。
2.新建空项目
cloud-provider-payment8084
添加依赖
<dependencies>
<dependency>
<groupId>wf.springcloud</groupId>
<artifactId>cloud-api-commons</artifactId>
<version>1.0-SNAPSHOT</version>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-actuator</artifactId>
</dependency>
<dependency>
<groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId>
</dependency>
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid-spring-boot-starter</artifactId>
<version>1.1.10</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-jdbc</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<scope>runtime</scope>
<optional>true</optional>
</dependency>
<!-- 引入zookeeper客户端 -->
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-zookeeper-discovery</artifactId>
</dependency>
</dependencies>
这个依赖中有一些问题，不过我们后面在解决。
添加yml文件
server:
port: 8084
# 服务别名---zookeeper注册中心名称
spring:
application:
name: cloud-provider-payment
cloud:
zookeeper:
connect-string: 192.168.211.133:2181
datasource:
type: com.alibaba.druid.pool.DruidDataSource
driver-class-name: com.mysql.jdbc.Driver
url: jdbc:mysql://localhost:3306/cloud?useUnicode=true&characterEncoding=utf8&serverTimezone=GMT
username: root
password: 123456
写主启动类
@SpringBootApplication
@EnableDiscoveryClient
public class PaymentMain8084 {
public static void main(String[] args) {
SpringApplication.run(PaymentMain8084.class,args);
}
}
写controller
@RestController
@Slf4j
public class PaymentController {
@Value("${server.port}")
private String serverPort;
@RequestMapping(value = "/payment/zk")
public String paymentzk(){
return "springcloud with zookeeper: " + serverPort + " " + UUID.randomUUID().toString();
}
}
项目完成启动项目
此时会出现报错如下：
java.lang.reflect.UndeclaredThrowableException: null
at org.springframework.util.ReflectionUtils.rethrowRuntimeException(ReflectionUtils.java:147) ~[spring-core-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at org.springframework.cloud.zookeeper.serviceregistry.ZookeeperServiceRegistry.register(ZookeeperServiceRegistry.java:74) ~[spring-cloud-zookeeper-discovery-2.2.0.RELEASE.jar:2.2.0.RELEASE]
at org.springframework.cloud.zookeeper.serviceregistry.ZookeeperServiceRegistry.register(ZookeeperServiceRegistry.java:40) ~[spring-cloud-zookeeper-discovery-2.2.0.RELEASE.jar:2.2.0.RELEASE]
at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.register(AbstractAutoServiceRegistration.java:239) ~[spring-cloud-commons-2.2.1.RELEASE.jar:2.2.1.RELEASE]
at org.springframework.cloud.zookeeper.serviceregistry.ZookeeperAutoServiceRegistration.register(ZookeeperAutoServiceRegistration.java:78) ~[spring-cloud-zookeeper-discovery-2.2.0.RELEASE.jar:2.2.0.RELEASE]
at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.start(AbstractAutoServiceRegistration.java:138) ~[spring-cloud-commons-2.2.1.RELEASE.jar:2.2.1.RELEASE]
at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.bind(AbstractAutoServiceRegistration.java:101) ~[spring-cloud-commons-2.2.1.RELEASE.jar:2.2.1.RELEASE]
at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.onApplicationEvent(AbstractAutoServiceRegistration.java:88) ~[spring-cloud-commons-2.2.1.RELEASE.jar:2.2.1.RELEASE]
at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.onApplicationEvent(AbstractAutoServiceRegistration.java:47) ~[spring-cloud-commons-2.2.1.RELEASE.jar:2.2.1.RELEASE]
at org.springframework.context.event.SimpleApplicationEventMulticaster.doInvokeListener(SimpleApplicationEventMulticaster.java:172) ~[spring-context-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:165) ~[spring-context-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:139) ~[spring-context-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:403) ~[spring-context-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:360) ~[spring-context-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.finishRefresh(ServletWebServerApplicationContext.java:165) ~[spring-boot-2.2.2.RELEASE.jar:2.2.2.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:553) ~[spring-context-5.2.2.RELEASE.jar:5.2.2.RELEASE]
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:141) ~[spring-boot-2.2.2.RELEASE.jar:2.2.2.RELEASE]
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:747) [spring-boot-2.2.2.RELEASE.jar:2.2.2.RELEASE]
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:397) [spring-boot-2.2.2.RELEASE.jar:2.2.2.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:315) [spring-boot-2.2.2.RELEASE.jar:2.2.2.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1226) [spring-boot-2.2.2.RELEASE.jar:2.2.2.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1215) [spring-boot-2.2.2.RELEASE.jar:2.2.2.RELEASE]
at wf.springcloud.PaymentMain8084.main(PaymentMain8084.java:12) [classes/:na]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_144]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_144]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_144]
at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_144]
at org.springframework.boot.devtools.restart.RestartLauncher.run(RestartLauncher.java:49) [spring-boot-devtools-2.2.2.RELEASE.jar:2.2.2.RELEASE]
Caused by: org.apache.zookeeper.KeeperException$UnimplementedException: KeeperErrorCode = Unimplemented for /services/cloud-provider-payment/db0e2c89-7c41-4746-bf0c-a10d51130e95
at org.apache.zookeeper.KeeperException.create(KeeperException.java:103) ~[zookeeper-3.5.3-beta.jar:3.5.3-beta-8ce24f9e675cbefffb8f21a47e06b42864475a60]
at org.apache.zookeeper.KeeperException.create(KeeperException.java:51) ~[zookeeper-3.5.3-beta.jar:3.5.3-beta-8ce24f9e675cbefffb8f21a47e06b42864475a60]
at org.apache.zookeeper.ZooKeeper.create(ZooKeeper.java:1525) ~[zookeeper-3.5.3-beta.jar:3.5.3-beta-8ce24f9e675cbefffb8f21a47e06b42864475a60]
at org.apache.curator.framework.imps.CreateBuilderImpl$17.call(CreateBuilderImpl.java:1181) ~[curator-framework-4.0.1.jar:4.0.1]
at org.apache.curator.framework.imps.CreateBuilderImpl$17.call(CreateBuilderImpl.java:1158) ~[curator-framework-4.0.1.jar:4.0.1]
at org.apache.curator.connection.StandardConnectionHandlingPolicy.callWithRetry(StandardConnectionHandlingPolicy.java:64) ~[curator-client-4.0.1.jar:na]
at org.apache.curator.RetryLoop.callWithRetry(RetryLoop.java:100) ~[curator-client-4.0.1.jar:na]
at org.apache.curator.framework.imps.CreateBuilderImpl.pathInForeground(CreateBuilderImpl.java:1155) ~[curator-framework-4.0.1.jar:4.0.1]
at org.apache.curator.framework.imps.CreateBuilderImpl.protectedPathInForeground(CreateBuilderImpl.java:605) ~[curator-framework-4.0.1.jar:4.0.1]
at org.apache.curator.framework.imps.CreateBuilderImpl.forPath(CreateBuilderImpl.java:595) ~[curator-framework-4.0.1.jar:4.0.1]
at org.apache.curator.framework.imps.CreateBuilderImpl.forPath(CreateBuilderImpl.java:49) ~[curator-framework-4.0.1.jar:4.0.1]
at org.apache.curator.x.discovery.details.ServiceDiscoveryImpl.internalRegisterService(ServiceDiscoveryImpl.java:236) ~[curator-x-discovery-4.0.1.jar:na]
at org.apache.curator.x.discovery.details.ServiceDiscoveryImpl.registerService(ServiceDiscoveryImpl.java:191) ~[curator-x-discovery-4.0.1.jar:na]
at org.springframework.cloud.zookeeper.serviceregistry.ZookeeperServiceRegistry.register(ZookeeperServiceRegistry.java:71) ~[spring-cloud-zookeeper-discovery-2.2.0.RELEASE.jar:2.2.0.RELEASE]
... 26 common frames omitted
这是因为我们在服务器端的Zookeeper和项目中的Zookeeper版本不匹配，因为之前说过服务器端的Zookeeper版本是3.4.11，而项目中内置的Zookeeper版本是3.5.3-bate版
故想要解决这个问题，就不让内置Zookeeper生效，使用我们与服务器端版本相同的Zookeeper。该pom文件
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-zookeeper-discovery</artifactId>
<exclusions>
<exclusion>
<groupId>org.apache.zookeeper</groupId>
<artifactId>zookeeper</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.apache.zookeeper</groupId>
<artifactId>zookeeper</artifactId>
<version>3.4.11</version>
</dependency>
此处只给出了Zookeeper需要修改的依赖，其他部分不动。改完pom文件后项目就可以运行了。
访问项目给出的端口
服务器端也可以看到项目已经被注册
到此SpringCloud整合Zookeeper完毕。
服务节点注册进zookeeper后是临时节点，服务停止后Zookeeper会把节点先保留一段时间，如果超时还是不能检测到服务的心跳，Zookeeper会直接删除服务节点，等待服务下次开启后重新注册。
Zookeeper代替Eureka
eureka的作用是注册中心，用来注册服务，而Zookeeper能做到与eureka相同的事情，由于我们上面已经写过一个provider项目吗，提供服务，那么我们还需要一个项目来使用它，故先建项目
建项目
新建一个cloud-consumer-orderzk80
写pom
同cloud-provider-payment8084
<dependencies>
<dependency>
<groupId>wf.springcloud</groupId>
<artifactId>cloud-api-commons</artifactId>
<version>1.0-SNAPSHOT</version>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-actuator</artifactId>
</dependency>
<dependency>
<groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId>
</dependency>
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid-spring-boot-starter</artifactId>
<version>1.1.10</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-jdbc</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<scope>runtime</scope>
<optional>true</optional>
</dependency>
<!-- 引入zookeeper客户端 -->
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-zookeeper-discovery</artifactId>
<exclusions>
<exclusion>
<groupId>org.apache.zookeeper</groupId>
<artifactId>zookeeper</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.apache.zookeeper</groupId>
<artifactId>zookeeper</artifactId>
<version>3.4.11</version>
</dependency>
</dependencies>
建yml
新建application.yml文件
server:
port: 80
# 服务别名---zookeeper注册中心名称
spring:
application:
name: cloud-consumer-oederzk
cloud:
zookeeper:
connect-string: 192.168.211.133:2181
datasource:
type: com.alibaba.druid.pool.DruidDataSource
driver-class-name: com.mysql.jdbc.Driver
url: jdbc:mysql://localhost:3306/cloud?useUnicode=true&characterEncoding=utf8&serverTimezone=GMT
username: root
password: 123456
写启动类
PaymentOrderZkMain80 .Java
@SpringBootApplication
@EnableDiscoveryClient
public class PaymentOrderZkMain80 {
public static void main(String[] args) {
SpringApplication.run(PaymentOrderZkMain80.class,args);
}
}
配置及业务类
ApplicationContextConfig .java。用于引入RestTemplate，RestTemplate可以实现不同服务间的通信，是由其他人提供如果我们想让其直接注入，就只能这样做
@Configuration
public class ApplicationContextConfig {
@Bean
@LoadBalanced
public RestTemplate getTemplate(){
return new RestTemplate();
}
}
OrderZkController .java
@RestController
@Slf4j
public class OrderZkController {
private static final String PATH = "http://cloud-provider-payment";
@Resource
private RestTemplate restTemplate;
@GetMapping(value = "/consumer/payment/zk")
public String paymentInfo(){
String t = restTemplate.getForObject(PATH + "/payment/zk", String.class);
return t;
}
}
启动服务
表示成功软工是建立集群则类似EurEureka。