SpingCloud之feign框架調用
阿新 • • 發佈:2018-10-27
for type namespace tco war bind 消費 mode 生產者
1.生產者(沒有什麽特殊性)
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>com.example</groupId> <artifactId>cloud-provider</artifactId> <version>0.0.1-SNAPSHOT</version> <packaging>jar</packaging> <name>cloud-provider</name> <description>Demo project for Spring Boot</description> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>2.0.6.RELEASE</version> <relativePath/> <!-- lookup parent from repository --> </parent><properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding> <java.version>1.8</java.version> <spring-cloud.version>Finchley.SR2</spring-cloud.version> </properties> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>org.mybatis.spring.boot</groupId> <artifactId>mybatis-spring-boot-starter</artifactId> <version>1.3.2</version> </dependency> <!--Service Discovery with Zookeeper--> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-zookeeper-discovery</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-devtools</artifactId> <scope>runtime</scope> </dependency> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> </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> <scope>test</scope> </dependency> </dependencies> <dependencyManagement> <dependencies> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-dependencies</artifactId> <version>${spring-cloud.version}</version> <type>pom</type> <scope>import</scope> </dependency> </dependencies> </dependencyManagement> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> <configuration> <fork>true</fork> </configuration> </plugin> </plugins> </build> </project>
application.yml
spring: datasource: driver-class-name: com.mysql.jdbc.Driver url: jdbc:mysql:///testdb?useSSL=true username: root password: 123 cloud: zookeeper: connect-string: 192.168.3.201:2181 application: name: provider mybatis: configuration: map-underscore-to-camel-case: true mapper-locations: classpath:mapper/*Mapper.xml logging: level: com.example.cloudprovider.mapper: debug
實體類
package com.example.cloudprovider.domain; import lombok.Getter; import lombok.Setter; import java.util.Date; @Setter @Getter public class UserInfo { private Integer userId; private String userName; private int userAge; private Date userBirth; }
Mapper
package com.example.cloudprovider.mapper; import com.example.cloudprovider.domain.UserInfo; public interface UserInfoMapper { UserInfo getUser(Integer userId); }
Mapper.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.cloudprovider.mapper.UserInfoMapper"> <select id="getUser" resultType="com.example.cloudprovider.domain.UserInfo"> select user_id, user_name, user_age, user_birth from t_user where user_id = #{userId} </select> </mapper>
Service接口
package com.example.cloudprovider.service; import com.example.cloudprovider.domain.UserInfo; public interface UserService { UserInfo getUser(Integer userId); }
Service實現
package com.example.cloudprovider.service.impl; import com.example.cloudprovider.domain.UserInfo; import com.example.cloudprovider.mapper.UserInfoMapper; import com.example.cloudprovider.service.UserService; import org.springframework.stereotype.Service; import javax.annotation.Resource; @Service public class UserServiceImpl implements UserService { @Resource private UserInfoMapper userMapper; @Override public UserInfo getUser(Integer userId) { return userMapper.getUser(userId); } }
Controller
package com.example.cloudprovider.controller; import com.example.cloudprovider.domain.UserInfo; import com.example.cloudprovider.service.UserService; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.web.bind.annotation.GetMapping; import org.springframework.web.bind.annotation.PathVariable; import org.springframework.web.bind.annotation.RestController; @RestController public class UserInfoController { @Autowired private UserService userService; @GetMapping("user/{id}") public UserInfo getUser(@PathVariable("id") Integer userId) { return userService.getUser(userId); } }
服務發布類
package com.example.cloudprovider; import org.mybatis.spring.annotation.MapperScan; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; @SpringBootApplication @MapperScan("com.example.cloudprovider.mapper") //掃描Mapper類 註入到Spring容器中 public class CloudProviderApplication { public static void main(String[] args) { SpringApplication.run(CloudProviderApplication.class, args); } }
2.消費者(引入feign框架)
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>com.example</groupId> <artifactId>cloud-consumer</artifactId> <version>0.0.1-SNAPSHOT</version> <packaging>jar</packaging> <name>cloud-consumer</name> <description>Demo project for Spring Boot</description> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>2.0.6.RELEASE</version> <relativePath/> <!-- lookup parent from repository --> </parent> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding> <java.version>1.8</java.version> <spring-cloud.version>Finchley.SR2</spring-cloud.version> </properties> <dependencyManagement> <dependencies> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-dependencies</artifactId> <version>${spring-cloud.version}</version> <type>pom</type> <scope>import</scope> </dependency> </dependencies> </dependencyManagement> <dependencies> <!-- 引入feign依賴 --> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-openfeign</artifactId> </dependency> <!--Service Discovery with Zookeeper--> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-zookeeper-discovery</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-devtools</artifactId> <scope>runtime</scope> </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> <scope>test</scope> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> <configuration> <fork>true</fork> </configuration> </plugin> </plugins> </build> </project>
application.yml
spring: cloud: zookeeper: connect-string: 192.168.3.201:2181 discovery: register: false #不會註冊到zk中 provider: # 服務名稱 ribbon: # 負載均衡實現依靠ribbon # 負載策略 NFLoadBalancerRuleClassName: com.netflix.loadbalancer.RandomRule #隨機策略 其他策略百度
實體類
package com.example.cloudconsumer.vo; import lombok.Getter; import lombok.Setter; import java.util.Date; @Getter @Setter public class UserVO { private Integer userId; private String userName; private Date userBirth; }
RestTemplate配置類
package com.example.cloudconsumer.config; import org.springframework.boot.SpringBootConfiguration; import org.springframework.cloud.client.loadbalancer.LoadBalanced; import org.springframework.context.annotation.Bean; import org.springframework.web.client.RestTemplate; @SpringBootConfiguration public class RestTemplateConfiguration { @Bean @LoadBalanced // Ribbon 負載均衡 public RestTemplate restTemplate() { return new RestTemplate(); } }
Controller
package com.example.cloudconsumer.controller; import com.example.cloudconsumer.vo.UserVO; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.web.bind.annotation.GetMapping; import org.springframework.web.bind.annotation.PathVariable; import org.springframework.web.bind.annotation.RestController; import org.springframework.web.client.RestTemplate; @RestController public class UserWarpController { @Autowired private RestTemplate restTemplate; // 調用只有一個或者多個服務實例API的情況下 @GetMapping("warp/user/{userId}") public UserVO getUserData(@PathVariable("userId") Integer userId) { return restTemplate.getForObject("http://provider/user/"+userId, UserVO.class); } }
使用框架的Controller
package com.example.cloudconsumer.controller; import com.example.cloudconsumer.client.UserClient; import com.example.cloudconsumer.vo.UserVO; import org.springframework.web.bind.annotation.GetMapping; import org.springframework.web.bind.annotation.PathVariable; import org.springframework.web.bind.annotation.RestController; import javax.annotation.Resource; @RestController public class UserFeignController { @Resource private UserClient userClient; // 調用只有一個或者多個服務實例API的情況下 @GetMapping("feign/user/{userId}") public UserVO getUserData(@PathVariable("userId") Integer userId) { return userClient.getUserData(userId); } }
feign調用客戶端
package com.example.cloudconsumer.client; import com.example.cloudconsumer.vo.UserVO; import org.springframework.cloud.openfeign.FeignClient; import org.springframework.web.bind.annotation.GetMapping; import org.springframework.web.bind.annotation.PathVariable; /** * @FeignClient(name = "provider") * name為調用服務端的spring.application.name的值 */ @FeignClient(name = "provider") public interface UserClient { @GetMapping("user/{id}") public UserVO getUserData(@PathVariable("id") Integer userId); }
服務啟動類:
package com.example.cloudconsumer; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.cloud.client.discovery.EnableDiscoveryClient; import org.springframework.cloud.openfeign.EnableFeignClients; @SpringBootApplication @EnableDiscoveryClient //可以發現ZK的服務 @EnableFeignClients //可以發現feign的服務 public class CloudConsumerApplication { public static void main(String[] args) { SpringApplication.run(CloudConsumerApplication.class, args); } }
總結起來,feign框架可以理解成路由,對url進行再次包裝後供給客戶端調用,可以在這個路由上進行一系列限制操作,增強安全性。
SpingCloud之feign框架調用