Spring Cloud入门系列服务提供者总结

服务提供者使用Eureka Client组件创建首先在父项目中创建Eureka Client Server项目（Maven）创建完成以后，修改pom.xml文件

<?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>com.wenqi.springcloud</artifactId><groupId>org.example</groupId><version>1.0-SNAPSHOT</version> </parent> <modelVersion>4.0.0</modelVersion> <artifactId>EurekaClient</artifactId> <dependencies><dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId> <version>2.0.2.RELEASE</version></dependency> </dependencies></project>

编写application.yml文件

server: port: 8010 # 当前服务注册在eureka server上的名称spring: application: name: provider # 当前注册中心的访问地址eureka: client: service-url: defaultZone: http://localhost:8761/eureka/ # 是否将当前服务的ip注册到Eureka Server instance: prefer-ip-address: true

创建启动类

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

启动启动类，这时候访问http://localhost:8761/ 可以看到服务注册进来了。接下来进行增删改查的简单业务服务操作

创建实体类

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

创建repository

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

创建repository实现类

@Repositorypublic class StudentRepositoryimpl implements StudentRepository { private static Map<Long,Student> studentMap; static {studentMap = new HashMap<Long, Student>();studentMap.put(1L,new Student(1L,'张三',22));studentMap.put(2L,new Student(2L,'王五',20));studentMap.put(3L,new Student(3L,'李四',21)); } public Collection<Student> findAll() {return studentMap.values(); } public Student findById(long id) {return studentMap.get(id); } public void saveOrUpdate(Student student) {studentMap.put(student.getId(),student); } public void deleteById(long id) {studentMap.remove(id); }}

实现增删改查操作 controller

@RestController@RequestMapping('/student')public class StudentController { @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('/delete/{id}') public void deleteById(@PathVariable('id') long id){studentRepository.deleteById(id); }}

启动Eureka Client，并启动Eureka Server。使用postman工具进行测试

postman的使用自己下去进行了练习，不得不说测试还是很有必要的。

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