微服务学习笔记三 Spring Cloud Eureka Client 服务提供者

最新推荐文章于 2022-08-04 20:17:38 发布

原创最新推荐文章于 2022-08-04 20:17:38 发布 · 204 阅读

0 ·

CC 4.0 BY-SA版权

文章标签：

#eureka #cloud

Java 专栏收录该内容

54 篇文章

订阅专栏

本文详细介绍了如何使用Spring Cloud Netflix EurekaClient进行微服务注册与发现的完整流程，包括创建Module、配置EurekaClient、实现学生实体及接口、创建处理器等关键步骤。

Eureka Client 代码实现
创建Module，pom.xml

<dependencies>
    <dependency>
        <groupId>org.springframework.cloud</groupId>
        <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
        <version>2.0.2.RELEASE</version>
    </dependency>
</dependencies>

创建配置文件 application.yml，添加Eureka Client相关配置

server:
  port: 8010
spring:
  application:
    name: provider
eureka:
  client:
    service-url:
      defaultZone: http://localhost:8761/eureka/
  instance:
    prefer.ip-address: true

属性说明：
spring.application.name:当前服务注册在Eureka Server上的名称。
eureka.client.service-url.defaultZone：注册中心的访问地址。
eureka.instance.prefer.ip.address：是否将当前服务的ip注册到Eureka Server。

创建启动类 ProviderApplication

package com.shuang;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

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

创建实体 Student

package com.shuang.entity;

import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;

@Data
@AllArgsConstructor
@NoArgsConstructor
public class Student {
    private long id;
    private String name;
    private int age;
}

创建学生接口

package com.shuang.repository;

import com.shuang.entity.Student;

import java.util.Collection;

public interface StudentRepository {
    public Collection<Student> findAll();
    public Student findById(long id);
    public void saveOrUpdate(Student student);
    public void deleteById(long id);
}

创建实现类

package com.shuang.repository.impl;

import com.shuang.entity.Student;
import com.shuang.repository.StudentRepository;
import org.springframework.stereotype.Repository;

import java.util.Collection;
import java.util.HashMap;
import java.util.Map;

@Repository
public class StudentRepositoryImpl implements StudentRepository {
    public static Map<Long,Student> studentMap;

    static{
        studentMap=new HashMap<>();
        studentMap.put(1L,new Student(1L,"张三",22));
        studentMap.put(2L,new Student(2L,"李四",23));
        studentMap.put(3L,new Student(3L,"王五",24));
    }

    @Override
    public Collection<Student> findAll() {
        return studentMap.values();
    }

    @Override
    public Student findById(long id) {
        return studentMap.get(id);
    }

    @Override
    public void saveOrUpdate(Student student) {
         studentMap.put(student.getId(),student);
    }

    @Override
    public void deleteById(long id) {
        studentMap.remove(id);
    }
}

创建处理器 StudentHandler

package com.shuang.controller;


import com.shuang.entity.Student;
import com.shuang.repository.StudentRepository;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;

import java.util.Collection;

@RestController
@RequestMapping("/student")
public class StudentHandler {
    @Autowired
    private StudentRepository studentRepository;

    @GetMapping("/findAll")
    public Collection<Student> findAll(){
        return studentRepository.findAll();
    }
    @GetMapping("/findById/{id}")
    public Student findById(@PathVariable("id") long id){
        return studentRepository.findById(id);
    }
    @PostMapping("/save")
    public void save(@RequestBody Student student){
        studentRepository.saveOrUpdate(student);
    }
    @PutMapping("/update")
    public void update(@RequestBody Student student){
        studentRepository.saveOrUpdate(student);
    }
    @DeleteMapping("/deleteById/{id}")
    public void deleteById(@PathVariable("id") long id){
        studentRepository.deleteById(id);
    }
}