2 微服务提供者client注册到Eureka.md
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Eureka Client注册到Eureka Server
注册到Eureka Server主要是三个：
- maven依赖
<!--eureka client-->
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
</dependency>
- YML配置文件
eureka:
client:
register-with-eureka: true # 是否将自己注册进eurekaServer，默认true
fetchRegistry: 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
service-url:
# defaultZone: http://localhost:7001/eureka #单机版
defaultZone: http://eureka7001.com:7001/eureka,http://eureka7002.com:7002/eureka #集群版
instance:
instance-id: payment8001 # 实例ID
prefer-ip-address: true #访问路径可以显示IP地址
lease-renewal-interval-in-seconds: 1 # Eureka客户端向服务端发送心跳的时间间隔，单位为秒（默认30秒）
lease-expiration-duration-in-seconds: 2 # Eureka服务端在收到最后一次心跳后等待时间上限，单位为秒（默认90秒），超时将剔除服务
- 主启动类上加注解
@EnableEurekaClient
Rest微服务工程构建
1、微服务提供者Module模块
? 新建模块cloud-provider-payment8001
? 建SQL
CREATE TABLE payment (
id bigint(20) NOT NULL AUTO_INCREMENT COMMENT ‘ID‘,
serial varchar(200) DEFAULT ‘‘,
PRIMARY KEY(id)
) ENGINE=InnoDB AUTO_INCREMENT=1 DEFAULT CHARSET=utf8;
2、改pom
父POM
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.example</groupId>
<artifactId>springcloud</artifactId>
<packaging>pom</packaging>
<version>0.0.1-SNAPSHOT</version>
<modules>
<module>cloud-eureka-server7001</module>
<module>cloud-eureka-server7002</module>
<module>cloud-provider-payment8001</module>
</modules>
<name>springcloud</name>
<description>Demo project for Spring Boot</description>
<!--统一管理jar包和版本-->
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<maven.compiler.source>1.8</maven.compiler.source>
<maven.compiler.target>1.8</maven.compiler.target>
<junit.version>4.12</junit.version>
<log4j.version>1.2.17</log4j.version>
<lombok.version>1.16.18</lombok.version>
<mysql.version>8.0.18</mysql.version>
<druid.version>1.1.16</druid.version>
<druid.spring.boot.starter.version>1.1.10</druid.spring.boot.starter.version>
<spring.boot.version>2.2.2.RELEASE</spring.boot.version>
<spring.cloud.version>Hoxton.SR1</spring.cloud.version>
<spring.cloud.alibaba.version>2.1.0.RELEASE</spring.cloud.alibaba.version>
<mybatis.spring.boot.version>1.3.0</mybatis.spring.boot.version>
<mybatis-spring-boot-starter.version>2.1.1</mybatis-spring-boot-starter.version>
<hutool-all.version>5.1.0</hutool-all.version>
</properties>
<!--子模块继承后,提供作用:锁定版本+子module不用groupId和version-->
<dependencyManagement>
<dependencies>
<!--springboot 2.2.2-->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-dependencies</artifactId>
<version>${spring.boot.version}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
<!--Spring cloud Hoxton.SR1-->
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-dependencies</artifactId>
<version>${spring.cloud.version}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
<!--Spring cloud alibaba 2.1.0.RELEASE-->
<dependency>
<groupId>com.alibaba.cloud</groupId>
<artifactId>spring-cloud-alibaba-dependencies</artifactId>
<version>${spring.cloud.alibaba.version}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>${mysql.version}</version>
</dependency>
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid</artifactId>
<version>${druid.version}</version>
</dependency>
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid-spring-boot-starter</artifactId>
<version>${druid.spring.boot.starter.version}</version>
</dependency>
<dependency>
<groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId>
<version>${mybatis-spring-boot-starter.version}</version>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>${lombok.version}</version>
</dependency>
</dependencies>
</dependencyManagement>
<build>
<finalName>cloud2020</finalName>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<configuration>
<fork>true</fork>
<addResources>true</addResources>
</configuration>
</plugin>
</plugins>
</build>
</project>
cloud-provider-payment8001POM
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<parent>
<artifactId>springcloud</artifactId>
<groupId>com.example</groupId>
<version>0.0.1-SNAPSHOT</version>
</parent>
<modelVersion>4.0.0</modelVersion>
<artifactId>cloud-provider-payment8001</artifactId>
<dependencies>
<!--eureka client-->
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
</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>
</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>
<!--devtools-->
<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>
</dependency>
</dependencies>
</project>
3、写yml
application
server:
port: 8001
spring:
application:
name: cloud-payment-service #服务名称
datasource:
type: com.alibaba.druid.pool.DruidDataSource #当前数据源操作类型
driver-class-name: com.mysql.cj.jdbc.Driver #mysql驱动包
url: jdbc:mysql://localhost:3306/db2019?useUnicode=true&characterEncoding=utf-8&useSSL=false&serverTimezone=UTC
username: root
password: 123456
eureka:
client:
register-with-eureka: true # 是否将自己注册进eurekaServer，默认true
fetchRegistry: 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
service-url:
# defaultZone: http://localhost:7001/eureka #单机版
defaultZone: http://eureka7001.com:7001/eureka,http://eureka7002.com:7002/eureka #集群版
instance:
instance-id: payment8001
prefer-ip-address: true #访问路径可以显示IP地址
lease-renewal-interval-in-seconds: 1 # Eureka客户端向服务端发送心跳的时间间隔，单位为秒（默认30秒）
lease-expiration-duration-in-seconds: 2 # Eureka服务端在收到最后一次心跳后等待时间上限，单位为秒（默认90秒），超时将剔除服务
mybatis:
mapper-locations: classpath:mapper/*.xml
type-aliases-package: com.example.entities #所有entity别名所在包
4、主启动
package com.example;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
import org.springframework.cloud.netflix.eureka.EnableEurekaClient;
@SpringBootApplication
@EnableEurekaClient
@EnableDiscoveryClient
public class PaymentMain8001 {
public static void main(String[] args) {
SpringApplication.run(PaymentMain8001.class, args);
}
}
5、业务类
entities
- Payment
package com.example.entities;
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
import java.io.Serializable;
@Data
@AllArgsConstructor
@NoArgsConstructor
public class Payment implements Serializable {
private Long id;
private String serial;
}
- Payment
package com.example.entities;
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
@Data
@AllArgsConstructor
@NoArgsConstructor
public class CommonResult<T> {
private Integer code;
private String message;
private T data;
public CommonResult(Integer code, String message) {
this(code, message, null);
}
}
dao
package com.example.dao;
import com.example.entities.Payment;
import org.apache.ibatis.annotations.Mapper;
import org.apache.ibatis.annotations.Param;
@Mapper
public interface PaymentDao {
public int create(Payment payment);
public Payment getPaymentById(@Param("id") Long id);
}
mapper.xml
- main esourcesmapper/PaymentMapper.xml
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd" >
<mapper namespace="com.example.dao.PaymentDao">
<resultMap id="BaseResultMap" type="Payment">
<id column="id" property="id" jdbcType="BIGINT"/>
<result column="serial" property="serial" jdbcType="VARCHAR"/>
</resultMap>
<insert id="create" parameterType="Payment" useGeneratedKeys="true" keyProperty="id">
INSERT INTO payment(serial) VALUES(#{serial});
</insert>
<select id="getPaymentById" parameterType="Long" resultMap="BaseResultMap">
SELECT * FROM payment WHERE id=#{id};
</select>
</mapper>
service
- 接口
package com.example.service;
import com.example.entities.Payment;
import org.apache.ibatis.annotations.Param;
public interface PaymentSerivice {
public int create(Payment payment);
public Payment getPaymentById(@Param("id") Long id);
}
- 实现类
package com.example.service.impl;
import com.example.dao.PaymentDao;
import com.example.entities.Payment;
import com.example.service.PaymentSerivice;
import org.springframework.stereotype.Service;
import javax.annotation.Resource;
@Service
public class PaymentServiceImpl implements PaymentSerivice {
@Resource
private PaymentDao paymentDao;
@Override
public int create(Payment payment) {
return paymentDao.create(payment);
}
@Override
public Payment getPaymentById(Long id) {
return paymentDao.getPaymentById(id);
}
}
controller
package com.atguigu.springcloud.controller;
import com.atguigu.springcloud.entities.CommonResult;
import com.atguigu.springcloud.entities.Payment;
import com.atguigu.springcloud.service.PaymentSerivice;
import lombok.extern.slf4j.Slf4j;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RestController;
import javax.annotation.Resource;
@RestController
@Slf4j
public class PaymentController {
@Resource
private PaymentSerivice paymentSerivice;
@PostMapping(value = "/payment/create")
public CommonResult create(Payment payment) {
int result = paymentSerivice.create(payment);
log.info("*** 插入结果：" + result);
return result > 0 ? new CommonResult(200, "插入数据库成功", result) : new CommonResult(444, "插入数据库失败");
}
@GetMapping("/payment/get/{id}")
public CommonResult getPaymentById(@PathVariable("id") Long id) {
Payment payment = paymentSerivice.getPaymentById(id);
log.info("查询结果：" + payment);
return payment != null ? new CommonResult(200, "查询成功", payment) : new CommonResult(444, "查询失败");
}
}
以上是关于2 微服务提供者client注册到Eureka.md的主要内容，如果未能解决你的问题，请参考以下文章
SpringCloud微服务(01)：Eureka组件，管理服务注册与发现