springCloud入门（三）远程调用方法

新建一个客户端调用已经注册的远程服务器方法：

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pom.xml

<?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">    <modelVersion>4.0.0</modelVersion>    <groupId>demo</groupId>    <artifactId>cloud-simple-ui</artifactId>    <version>1.0-SNAPSHOT</version>    <packaging>jar</packaging>    <parent>        <groupId>org.springframework.boot</groupId>        <artifactId>spring-boot-starter-parent</artifactId>        <version>1.3.5.RELEASE</version>    </parent>    <dependencyManagement>        <dependencies>            <dependency>                <groupId>org.springframework.cloud</groupId>                <artifactId>spring-cloud-dependencies</artifactId>                <version>Brixton.RELEASE</version>                <type>pom</type>                <scope>import</scope>            </dependency>        </dependencies>    </dependencyManagement>    <properties>        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>        <java.version>1.7</java.version>    </properties>    <dependencies>        <dependency>            <groupId>org.springframework.boot</groupId>            <artifactId>spring-boot-starter-web</artifactId>        </dependency>        <dependency>            <groupId>org.springframework.cloud</groupId>            <artifactId>spring-cloud-starter-config</artifactId>        </dependency>        <dependency>            <groupId>org.springframework.boot</groupId>            <artifactId>spring-boot-starter-actuator</artifactId>        </dependency>        <!-- 使用eureka -->        <dependency>            <groupId>org.springframework.cloud</groupId>            <artifactId>spring-cloud-starter-feign</artifactId>        </dependency>        <dependency>            <groupId>org.springframework.cloud</groupId>            <artifactId>spring-cloud-starter-eureka</artifactId>        </dependency>        <!-- 使用hystrix -->        <dependency>            <groupId>org.springframework.cloud</groupId>            <artifactId>spring-cloud-starter-hystrix</artifactId>        </dependency>        <dependency>            <groupId>org.jolokia</groupId>            <artifactId>jolokia-core</artifactId>        </dependency>    </dependencies>    <build>        <plugins>            <plugin>                <groupId>org.springframework.boot</groupId>                <artifactId>spring-boot-maven-plugin</artifactId>            </plugin>        </plugins>        <defaultGoal>compile</defaultGoal>    </build></project>

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user实体类

public class User {    private String username;    public String getUsername() {        return username;    }    public void setUsername(String username) {        this.username = username;    }}

userService 服务类

@Servicepublic class UserService {     @Autowired       RestTemplate restTemplate;     final String SERVICE_NAME="远程调用的服务名称";     @HystrixCommand(fallbackMethod = "fallbackSearchAll")     //这里使用了断路器，就是@HystrixCommand注解。断路器的基本作用就是@HystrixCommand注解的方法失败后，系统将自动切换到fallbackMethod方法执行。断路器Hystrix具备回退机制、请求缓存和请求打包以及监控和配置等功能     public List<User> readUserInfo() {         return restTemplate.getForObject("http://"+SERVICE_NAME+"/user", List.class);    }         private List<User> fallbackSearchAll() {         //这里是被@HystrixCommand方法注解过的方法失败后执行的方法     }}

UserController 控制器

@RestControllerpublic class UserController {    @Autowired    UserService userService;    @RequestMapping(value="/users")    public ResponseEntity<List<User>> readUserInfo(){        List<User> users=userService.readUserInfo();                return new ResponseEntity<List<User>>(users,HttpStatus.OK);    }}

bootstrap.properties 配置文件

spring.cloud.config.uri=http://127.0.0.1:${config.port:8888}spring.cloud.config.name=cloud-configspring.cloud.config.profile=${config.profile:dev}eureka.client.serviceUrl.defaultZone=http\://localhost\:8761/eureka/#service namespring.application.name=当前项目注册eureka的名字#ribbon configcloud-simple-service.ribbon.ConnectTimeout=5000cloud-simple-service.ribbon.ReadTimeout=10000server.port=8080

启动类

public class WebApplication {    public static void main(String[] args) throws Exception {        SpringApplication.run(WebApplication.class, args);    }}

启动程序后就可以在eureka中发现服务，访问URL即可远程调用方法。