12306 网站谁做的,seo的作用主要有,电子商务网站建设答辩记录,房价下跌最惨10大城市一、 Feign简介
Feign [feɪn] 译文 伪装。Feign是一个声明式WebService客户端.使用Feign能让编写WebService客户端更加简单,它的使用方法是定义一个接口#xff0c;然后在上面添加注解。不再需要拼接URL#xff0c;参数等操作。项目主页#xff1a;https://github.com/Ope…一、 Feign简介
Feign [feɪn] 译文 伪装。Feign是一个声明式WebService客户端.使用Feign能让编写WebService客户端更加简单,它的使用方法是定义一个接口然后在上面添加注解。不再需要拼接URL参数等操作。项目主页https://github.com/OpenFeign/feign 。
集成Ribbon的负载均衡功能集成了Hystrix的熔断器功能支持请求压缩大大简化了远程调用的代码同时功能还增强啦Feign以更加优雅的方式编写远程调用代码并简化重复代码
快速入门
实现步骤
导入feign依赖编写Feign客户端接口消费者启动引导类开启Feign功能注解访问接口测试
1. 导入feign依赖 !--配置feign--dependencygroupIdorg.springframework.cloud/groupIdartifactIdspring-cloud-starter-openfeign/artifactId/dependency1.1创建实体类User
package com.william.domain;import java.util.Date;/*** author lijunxuan* date Created in 2019/6/30 18:20* description * version: 1.0*/
public class User {private Integer id;//主键idprivate String username;//用户名private String password;//密码private String name;//姓名private Integer age;//年龄private Integer sex;//性别 1男性2女性private Date birthday; //出生日期private Date created; //创建时间private Date updated; //更新时间private String note;//备注Overridepublic String toString() {return User{ id id , username username \ , password password \ , name name \ , age age , sex sex , birthday birthday , created created , updated updated , note note \ };}public Integer getId() {return id;}public void setId(Integer id) {this.id id;}public String getUsername() {return username;}public void setUsername(String username) {this.username username;}public String getPassword() {return password;}public void setPassword(String password) {this.password password;}public String getName() {return name;}public void setName(String name) {this.name name;}public Integer getAge() {return age;}public void setAge(Integer age) {this.age age;}public Integer getSex() {return sex;}public void setSex(Integer sex) {this.sex sex;}public Date getBirthday() {return birthday;}public void setBirthday(Date birthday) {this.birthday birthday;}public Date getCreated() {return created;}public void setCreated(Date created) {this.created created;}public Date getUpdated() {return updated;}public void setUpdated(Date updated) {this.updated updated;}public String getNote() {return note;}public void setNote(String note) {this.note note;}
}
2. 编写Feign客户端接口
package com.william.service;import com.william.domain.User;
import org.springframework.cloud.openfeign.FeignClient;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;FeignClient(user-service)
public interface UserClient {/***RequestMapping* spring mvc 里面的注解* RequestMapping 反向映射生成请求地址。http请求* RequestParam(id) 是必须要进行请求地址参数的绑定* param id* return*/RequestMapping(/user/findById)User findById(RequestParam(id) Integer id);
}
3. 消费者启动引导类DemoApplication开启Feign功能注解 EnableFeignClients//开启feign客户端支持3.1编写ConsumerFeignController使用UserClient访问
package com.william.controller;import com.william.domain.User;
import com.william.service.UserClient;
import org.springframework.stereotype.Repository;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;import javax.annotation.Resource;/*** author lijunxuan* date Created in 2019/6/30 18:33* description * version: 1.0*/
RestController
public class FeigConsumerController {ResourceUserClient userClient;//注入FeignCLientRequestMapping(/findByIdFeign)public User findByIdFeign(Integer id){return userClient.findById(id);}
}
4. 访问接口测试
