springCould中的zookeeper-从小白开始【3】

目录

1.启动zookeeper❤️❤️❤️

2.创建8004模块 ❤️❤️❤️

 3.临时节点还是永久节点❤️❤️❤️

4.创建zk80消费模块❤️❤️❤️

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1.启动zookeeper❤️❤️❤️

• 进入自己zookeeper的bin目录下 分别使用命令：

./zkServer.sh start   和 ./zkCli.sh -server 主机名

2.创建8004模块 ❤️❤️❤️

1.建模块

在父工程下创建模块

注意：jdk版本和，maven版本

2.添加pom

1.springboot依赖

2.mybatis依赖

3.druid依赖

4.mysql依赖

5.zookeeper依赖

 <dependencies><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>1.2.16</version></dependency><!--mysql-connector-java--><dependency><groupId>mysql</groupId><artifactId>mysql-connector-java</artifactId></dependency><!--jdbc--><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-jdbc</artifactId></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-devtools</artifactId><scope>runtime</scope><optional>true</optional></dependency><dependency><groupId>org.projectlombok</groupId><artifactId>lombok</artifactId><optional>true</optional></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-test</artifactId><scope>test</scope></dependency><!--引入自己的api通用包--><dependency><groupId>org.example</groupId><artifactId>cloud-api-commons</artifactId><version>${project.version}</version></dependency><!--springboot整合zookeeper客户端--><dependency><groupId>org.springframework.cloud</groupId><artifactId>spring-cloud-starter-zookeeper-discovery</artifactId></dependency></dependencies>

3.添加yml

1.服务端口

2.服务名称

3.数据库连接池

4.zookeeper连接地址

5.mybatis配置

server:port: 8004spring:application:#服务名称name: cloud-provider-paymentdatasource:#druid连接池type: com.alibaba.druid.pool.DruidDataSourcedriver-class-name: com.mysql.cj.jdbc.Driverurl: jdbc:mysql://localhost:3306/springcloudusername: rootpassword: 123456#zookeeper服务注册中心cloud:zookeeper:connect-string: 192.168.20.129:2181,192.168.20.130:2181,192.168.20.131:2181mybatis:mapper-locations: classpath:mapper/*.xmltype-aliases-package: com.xz.springcloud.entity

4.添加主启动类

@EnableDiscoveryClient:将服务注册到服务注册中心（zookeeper）

@SpringBootApplication
@EnableDiscoveryClient//作为服务中心
public class PaymentMain8004 {public static void main(String[] args) {SpringApplication.run(PaymentMain8004.class);}
}

5.编写业务类

@RestController
public class PaymentController {@Autowiredprivate PaymentService paymentService;@Value("${server.port}")private String serverPort;@GetMapping("/payment/getById/{id}")public CommonResult getById(@PathVariable("id") Integer id){Payment payment = paymentService.getPaymentById(id);if (payment!=null){return new CommonResult(200,"查询成功,serverPort:"+serverPort,payment);}else {return new CommonResult(404,"查询无果，serverPort:"+serverPort,null);}}@RequestMapping("/payment/zk")public String paymentZk(){return "springCloud with zookeeper:"+serverPort+"\t"+ UUID.randomUUID().toString();}
}

6.测试

• 1.启动主启动类,刷新浏览器

• 2.访问zookeeper

 说明zookeeper配置成功

 3.临时节点还是永久节点❤️❤️❤️

当关闭8004服务时，在查询zookeeper，发现节点剔除

所以：zookeeper存储的是临时节点，当服务消失时，会马上剔除 

4.创建zk80消费模块❤️❤️❤️

1.建模块

在父工程下创建模块

注意jdk版本和maven版本

2.写pom

1.springboot依赖

2.通用依赖

3.zookeeper依赖

<dependencies><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.projectlombok</groupId><artifactId>lombok</artifactId><optional>true</optional></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-test</artifactId><scope>test</scope></dependency><dependency><groupId>org.example</groupId><artifactId>cloud-api-commons</artifactId><version>${project.version}</version></dependency><!--spring boot整合zookeeper--><dependency><groupId>org.springframework.cloud</groupId><artifactId>spring-cloud-starter-zookeeper-discovery</artifactId></dependency></dependencies>

3.改yml

1.服务端口

2.服务名

3.zookeeper连接ip（我这里使用集群）

server:port: 80spring:application:name: cloud-consumer-ordercloud:zookeeper:connect-string: 192.168.20.129:2181,192.168.20.130:2181,192.168.20.131:2181

4.主启动类

@EnableDiscoveryClient添加上

@SpringBootApplication
@EnableDiscoveryClient
public class OrderZkMain80 {public static void main(String[] args) {SpringApplication.run(OrderZkMain80.class);}
}

5.业务代码

• 1.先将Rest Template注入到spring中

注意：因为访问的是服务名，而不是具体的ip，所以加上@LoadBalance注解

@Configuration
public class ApplicationConfig {@Bean@LoadBalancedpublic RestTemplate getRestTemplate(){return new RestTemplate();}
}

• 2.controller

1.声明常量，表示zookeeper中8004的服务名

2.注入RestTemplate

3.调用restTemplate访问

@RestController
public class OrderController {public static final String INVOKE_URL = "http://cloud-provider-payment";@Autowiredprivate RestTemplate restTemplate;@GetMapping("/payment/getById/{id}")public CommonResult<Payment>  getPayment(@PathVariable("id") Integer id){return restTemplate.getForObject(INVOKE_URL+"/payment/getById/"+id,CommonResult.class);}@GetMapping("/payment/zk")public String getDiscovery(){return restTemplate.getForObject(INVOKE_URL+"/payment/zk",String.class);}
}

6.测试

• 1.使用80访问，刷新浏览器，依然成功

• 2.查看zookeeper节点 ，节点创建成功