• Ribbon负载均衡及Feign消费者调用服务

    微服务调用Ribbon

    简介

    Ribbon是Netflix发布的负载均衡器，它有助于控制HTTP和TCP的客户端的行为。为Ribbon配置服务提供者地址后，Ribbon就可基于某种负载均衡算法，自动地帮助服务消费者去请求。Ribbon默认为我们提供了很多负载均衡算法，例如轮询、随机等。当然，我们也可为Ribbon实现自定义的负载均衡算法。

    在Spring Cloud中，当Ribbon与Eureka配合使用时，Ribbon可自动从Eureka Server获取服务提供者地址列表，并基于负载均衡算法，请求其中一个服务提供者实例。展示了Ribbon与Eureka配合使用时的架构。

     

    初步应用

    Ribbon是客户端负载均衡，所以肯定集成再消费端，也就是consumer端我们修改microservice-student-consumer-80

    pom.xml 加入 ribbon相关依赖

     1 <!--ribbon相关依赖-->
 2         <dependency>
 3             <groupId>org.springframework.cloud</groupId>
 4             <artifactId>spring-cloud-starter-eureka</artifactId>
 5         </dependency>
 6         <dependency>
 7             <groupId>org.springframework.cloud</groupId>
 8             <artifactId>spring-cloud-starter-ribbon</artifactId>
 9         </dependency>
10         <dependency>
11             <groupId>org.springframework.cloud</groupId>
12             <artifactId>spring-cloud-starter-config</artifactId>
13         </dependency>

    添加application.yml配置

    1 server:
2   port: 81
3   context-path: /
4 eureka:
5   client:
6     service-url:
7       defaultZone: http://eureka2001.javaqi.com:2001/eureka/,http://eureka2002.javaqi.com:2002/eureka/,http://eureka2003.javaqi.com:2003/eureka/
8     register-with-eureka: false

    SpringCloudConfig加个负载均衡配置

    @LoadBalanced  

     1 package com.javaqi.microservicestudentconsumer80.config;
 2 
 3 import com.netflix.loadbalancer.IRule;
 4 import com.netflix.loadbalancer.RetryRule;
 5 import org.springframework.cloud.client.loadbalancer.LoadBalanced;
 6 import org.springframework.context.annotation.Bean;
 7 import org.springframework.context.annotation.Configuration;
 8 import org.springframework.web.client.RestTemplate;
 9 
10 @Configuration
11 public class SpringCloudConfig {
12 
13     @LoadBalanced  // 引入ribbon负载均衡
14     @Bean
15     public RestTemplate getRestTemplate(){
16         return new RestTemplate();
17     }
18     
19 }

    因为和eureka整合，所以启动类StudentConsumerApplication_80 加个注解

    @EnableEurekaClient

    修改下StudentConsumerController的PRE_HOST，改成指定的微服务应用名称；

    在服务提供者microservice-student-provider-1001的application.yml加下配置，指定下应用名称：

    application:

        name: microservice-student

    所以服务调用者这边的控制器里PRE_HOST改成 http://MICROSERVICE-STUDENT即可；MICROSERVICE-STUDENT为Eureka注册中心的应用名称

    先启动三个eureka，然后再启动服务提供者，再启动服务消费者；

     

     

    Ribbon负载均衡

    按照microservice-student-provider-1001建立一个microservice-student-provider子项目，然后将microservice-student-provider-1001这个子项目干掉；

    前面搭建了初步例子，但是还没实现真正负载均衡，我们这里要先搞三个服务提供者集群，然后才能演示负载均衡，以及负载均衡策略；

    新建项目microservice-student-provider-1002，microservice-student-provider-1003

    pom.xml，application.yml，以及java类都复制一份，启动类名称对应的改下；

    yml配置文件有两处要对应的改下，port端口改下，以及服务实例名称改下；

    pom.xml

     1 <?xml version="1.0" encoding="UTF-8"?>
 2 <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 3          xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
 4     <modelVersion>4.0.0</modelVersion>
 5     <parent>
 6         <groupId>com.javaqi</groupId>
 7         <artifactId>qimicroservice</artifactId>
 8         <version>1.0-SNAPSHOT</version>
 9     </parent>
10     <artifactId>microservice-student-provider</artifactId>
11 
12     <properties>
13         <java.version>1.8</java.version>
14     </properties>
15 
16     <dependencies>
17         <dependency>
18             <groupId>com.javaqi</groupId>
19             <artifactId>microservice-common</artifactId>
20         </dependency>
21         <dependency>
22             <groupId>org.springframework.boot</groupId>
23             <artifactId>spring-boot-starter-web</artifactId>
24         </dependency>
25         <dependency>
26             <groupId>org.springframework.boot</groupId>
27             <artifactId>spring-boot-starter-test</artifactId>
28             <scope>test</scope>
29         </dependency>
30         <dependency>
31             <groupId>org.springframework.boot</groupId>
32             <artifactId>spring-boot-starter-data-jpa</artifactId>
33         </dependency>
34         <dependency>
35             <groupId>mysql</groupId>
36             <artifactId>mysql-connector-java</artifactId>
37         </dependency>
38         <dependency>
39             <groupId>org.springframework.boot</groupId>
40             <artifactId>spring-boot-starter-tomcat</artifactId>
41         </dependency>
42         <dependency>
43             <groupId>com.alibaba</groupId>
44             <artifactId>druid-spring-boot-starter</artifactId>
45         </dependency>
46         <!--  修改后立即生效，热部署  -->
47         <dependency>
48             <groupId>org.springframework</groupId>
49             <artifactId>springloaded</artifactId>
50         </dependency>
51         <dependency>
52             <groupId>org.springframework.boot</groupId>
53             <artifactId>spring-boot-devtools</artifactId>
54         </dependency>
55 
56         <!--添加注册中心Eureka相关配置-->
57         <dependency>
58             <groupId>org.springframework.cloud</groupId>
59             <artifactId>spring-cloud-starter-eureka</artifactId>
60         </dependency>
61         <dependency>
62             <groupId>org.springframework.cloud</groupId>
63             <artifactId>spring-cloud-starter-config</artifactId>
64         </dependency>
65         <dependency>
66             <groupId>com.javaqi</groupId>
67             <artifactId>microservice-common</artifactId>
68             <version>1.0-SNAPSHOT</version>
69             <scope>compile</scope>
70         </dependency>
71 
72         <!-- actuator监控引入 -->
73         <dependency>
74             <groupId>org.springframework.boot</groupId>
75             <artifactId>spring-boot-starter-actuator</artifactId>
76         </dependency>
77         <dependency>
78             <groupId>com.javaqi</groupId>
79             <artifactId>microservice-student-provider-1001</artifactId>
80             <version>1.0-SNAPSHOT</version>
81             <scope>compile</scope>
82         </dependency>
83     </dependencies>
84 
85     <build>
86         <plugins>
87             <plugin>
88                 <groupId>org.springframework.boot</groupId>
89                 <artifactId>spring-boot-maven-plugin</artifactId>
90             </plugin>
91         </plugins>
92     </build>
93 </project>

    application.yml

      1 server:
  2   port: 1001
  3   context-path: /
  4 spring:
  5   datasource:
  6     type: com.alibaba.druid.pool.DruidDataSource
  7     driver-class-name: com.mysql.jdbc.Driver
  8     url: jdbc:mysql://localhost:3306/xufanqi?useUnicode=true&characterEncoding=utf8
  9     username: root
 10     password: 123
 11   jpa:
 12     hibernate:
 13       ddl-auto: update
 14     show-sql: true
 15   application:
 16     name: microservice-student
 17   profiles: provider-1001
 18 
 19 eureka:
 20   instance:
 21     hostname: localhost
 22     appname: microservice-student
 23     instance-id: microservice-student:1001
 24     prefer-ip-address: true
 25   client:
 26     service-url:
 27       defaultZone: http://eureka2001.javaqi.com:2001/eureka/,http://eureka2002.javaqi.com:2002/eureka/,http://eureka2003.javaqi.com:2003/eureka/
 28 
 29 info:
 30   groupId: com.javaqi.testSpringcloud
 31   artifactId: microservice-student-provider-1001
 32   version: 1.0-SNAPSHOT
 33   userName: http://javaqi.com
 34   phone: 123456
 35 
 36 ---
 37 server:
 38   port: 1002
 39   context-path: /
 40 spring:
 41   datasource:
 42     type: com.alibaba.druid.pool.DruidDataSource
 43     driver-class-name: com.mysql.jdbc.Driver
 44     url: jdbc:mysql://localhost:3306/xufanqi?useUnicode=true&characterEncoding=utf8
 45     username: root
 46     password: 123
 47   jpa:
 48     hibernate:
 49       ddl-auto: update
 50     show-sql: true
 51   application:
 52     name: microservice-student
 53   profiles: provider-1002
 54 
 55 eureka:
 56   instance:
 57     hostname: localhost
 58     appname: microservice-student
 59     instance-id: microservice-student:1002
 60     prefer-ip-address: true
 61   client:
 62     service-url:
 63       defaultZone: http://eureka2001.javaqi.com:2001/eureka/,http://eureka2002.javaqi.com:2002/eureka/,http://eureka2003.javaqi.com:2003/eureka/
 64 
 65 info:
 66   groupId: com.javaxl.testSpringcloud
 67   artifactId: microservice-student-provider-1002
 68   version: 1.0-SNAPSHOT
 69   userName: http://javaqi.com
 70   phone: 123456
 71 
 72 ---
 73 server:
 74   port: 1003
 75   context-path: /
 76 spring:
 77   datasource:
 78     type: com.alibaba.druid.pool.DruidDataSource
 79     driver-class-name: com.mysql.jdbc.Driver
 80     url: jdbc:mysql://localhost:3306/xufanqi?useUnicode=true&characterEncoding=utf8
 81     username: root
 82     password: 123
 83   jpa:
 84     hibernate:
 85       ddl-auto: update
 86     show-sql: true
 87   application:
 88     name: microservice-student
 89   profiles: provider-1003
 90 
 91 eureka:
 92   instance:
 93     hostname: localhost
 94     appname: microservice-student
 95     instance-id: microservice-student:1003
 96     prefer-ip-address: true
 97   client:
 98     service-url:
 99       defaultZone: http://eureka2001.javaqi.com:2001/eureka/,http://eureka2002.javaqi.com:2002/eureka/,http://eureka2003.javaqi.com:2003/eureka/
100 
101 info:
102   groupId: com.javaqi.testSpringcloud
103   artifactId: microservice-student-provider-1003
104   version: 1.0-SNAPSHOT
105   userName: http://javaqi.com
106   phone: 123456

    启动类MicroserviceStudentProviderApplication

     1 package com.javaqi.microservicestudentprovider;
 2 
 3 import org.springframework.boot.SpringApplication;
 4 import org.springframework.boot.autoconfigure.SpringBootApplication;
 5 import org.springframework.boot.autoconfigure.domain.EntityScan;
 6 import org.springframework.cloud.netflix.eureka.EnableEurekaClient;
 7 
 8 @EntityScan("com.javaqi.*.*")
 9 @EnableEurekaClient
10 @SpringBootApplication
11 public class MicroserviceStudentProviderApplication {
12 
13     public static void main(String[] args) {
14         SpringApplication.run(MicroserviceStudentProviderApplication.class, args);
15     }
16 
17 }

    StudentProviderController

     1 package com.javaqi.microservicestudentprovider.controller;
 2 
 3 import com.javaqi.microservicecommon.entity.Student;
 4 import com.javaqi.microservicestudentprovider.service.StudentService;
 5 import org.springframework.beans.factory.annotation.Autowired;
 6 import org.springframework.beans.factory.annotation.Value;
 7 import org.springframework.web.bind.annotation.*;
 8 
 9 import java.util.List;
10 
11 @RestController
12 @RequestMapping("/student")
13 public class StudentProviderController {
14  
15     @Autowired
16     private StudentService studentService;
17 
18     @Value("${server.port}")
19     private String port;
20 
21     @PostMapping(value="/save")
22     public boolean save(Student student){
23         try{
24             studentService.save(student);  
25             return true;
26         }catch(Exception e){
27             return false;
28         }
29     }
30      
31     @GetMapping(value="/list")
32     public List<Student> list(){
33         return studentService.list();
34     }
35      
36     @GetMapping(value="/get/{id}")
37     public Student get(@PathVariable("id") Integer id){
38         return studentService.findById(id);
39     }
40      
41     @GetMapping(value="/delete/{id}")
42     public boolean delete(@PathVariable("id") Integer id){
43         try{
44             studentService.delete(id);
45             return true;
46         }catch(Exception e){
47             return false;
48         }
49     }
50 
51     @RequestMapping("/ribbon")
52     public String ribbon(){
53         return "工号【"+port+"】正在为您服务";
54     }
55 }

    StudentConsumerController   

     1 package com.javaqi.microservicestudentconsumer80.controller;
 2 
 3 import com.javaqi.microservicecommon.entity.Student;
 4 import org.springframework.beans.factory.annotation.Autowired;
 5 import org.springframework.web.bind.annotation.*;
 6 import org.springframework.web.client.RestTemplate;
 7 
 8 import java.util.List;
 9 
10 @RestController
11 @RequestMapping("/student")
12 public class StudentConsumerController {
13 
14     private final static String SERVER_IP_PORT = "http://MICROSERVICE-STUDENT";
15  
16      @Autowired
17      private RestTemplate restTemplate;
18       
19      @PostMapping(value="/save")
20      private boolean save(Student student){
21          return restTemplate.postForObject(SERVER_IP_PORT+"/student/save", student, Boolean.class);
22      }
23       
24     @GetMapping(value="/list")
25     public List<Student> list(){
26         return restTemplate.getForObject(SERVER_IP_PORT+"/student/list", List.class);
27     }
28      
29     @GetMapping(value="/get/{id}")
30     public Student get(@PathVariable("id") Integer id){
31         return restTemplate.getForObject(SERVER_IP_PORT+"/student/get/"+id, Student.class);
32     }
33      
34     @GetMapping(value="/delete/{id}")
35     public boolean delete(@PathVariable("id") Integer id){
36         try{
37             restTemplate.getForObject(SERVER_IP_PORT+"/student/delete/"+id, Boolean.class);
38             return true;
39         }catch(Exception e){
40             return false;
41         }
42     }
43     @RequestMapping("/ribbon")
44     public String ribbon() {
45         return restTemplate.getForObject(SERVER_IP_PORT + "/student/ribbon", String.class);
46     }
47 
48 }

    配置

    访问结果

    停掉1003

     

    Feign简介及应用

    简介

    声明式服务调用Feign简单介绍下；

    Feign是一个声明式的Web Service客户端，它使得编写Web Serivce客户端变得更加简单。

    我们只需要使用Feign来创建一个接口并用注解来配置它既可完成。它具备可插拔的注解支持，包括Feign注解和JAX-RS注解。

    Feign也支持可插拔的编码器和解码器。Spring Cloud为Feign增加了对Spring MVC注解的支持，还整合了Ribbon和Eureka来提供均衡负载的HTTP客户端实现。

    这段话看起来比较懵逼，这里说下实际使用，前面Ribbon调用服务提供者，我们通过restTemplate调用，

    缺点是，多个地方调用，同一个请求要写多次，不方便统一维护，这时候Feign来了，就直接把请求统一搞一个service作为FeignClient，

    然后其他调用Controller需要用到的，直接注入service，直接调用service方法即可；同时Feign整合了Ribbon和Eureka，所以要配置负载均衡的话，直接配置Ribbon即可，无其他特殊地方；当然Fiegn也整合了服务容错保护，断路器Hystrix，后面再说。

    应用

    1、在common项目里建一个service（实际项目肯定是多个service）作为Feign客户端，用Feign客户端来调用服务器提供者，当然可以配置负载均衡；Feign客户端定义的目的，就是为了方便给其他项目调用；

    修改 microservice-common

    pom.xml引入Feign依赖：

     1 <?xml version="1.0" encoding="UTF-8"?>
 2 <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 3          xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
 4     <modelVersion>4.0.0</modelVersion>
 5     <parent>
 6         <groupId>com.javaqi</groupId>
 7         <artifactId>qimicroservice</artifactId>
 8         <version>1.0-SNAPSHOT</version>
 9     </parent>
10     <artifactId>microservice-common</artifactId>
11 
12 
13     <properties>
14         <java.version>1.8</java.version>
15     </properties>
16 
17     <dependencies>
18         <dependency>
19             <groupId>org.springframework.boot</groupId>
20             <artifactId>spring-boot-starter-web</artifactId>
21         </dependency>
22 
23         <dependency>
24             <groupId>org.springframework.boot</groupId>
25             <artifactId>spring-boot-starter-test</artifactId>
26             <scope>test</scope>
27         </dependency>
28 
29 
30         <dependency>
31             <groupId>org.springframework.boot</groupId>
32             <artifactId>spring-boot-starter-data-jpa</artifactId>
33         </dependency>
34 
35         <dependency>
36             <groupId>mysql</groupId>
37             <artifactId>mysql-connector-java</artifactId>
38         </dependency>
39 
40         <dependency>
41             <groupId>org.springframework.cloud</groupId>
42             <artifactId>spring-cloud-starter-feign</artifactId>
43         </dependency>
44     </dependencies>
45 
46     <build>
47         <plugins>
48             <plugin>
49                 <groupId>org.springframework.boot</groupId>
50                 <artifactId>spring-boot-maven-plugin</artifactId>
51             </plugin>
52         </plugins>
53     </build>
54 
55 </project>

    建StudentClientService接口；

     1 package com.javaqi.microservicecommon.service;
 2 
 3 import com.javaqi.microservicecommon.entity.Student;
 4 import org.springframework.cloud.netflix.feign.FeignClient;
 5 import org.springframework.web.bind.annotation.GetMapping;
 6 import org.springframework.web.bind.annotation.PathVariable;
 7 import org.springframework.web.bind.annotation.PostMapping;
 8 import org.springframework.web.bind.annotation.RequestMapping;
 9 
10 import java.util.List;
11 
12 /**
13  * Student Feign接口客户端
14  * @author Administrator
15  *
16  */
17 @FeignClient(value="MICROSERVICE-STUDENT")
18 public interface StudentClientService {
19  
20     /**
21      * 根据id查询学生信息
22      * @param id
23      * @return
24      */
25     @GetMapping(value="/student/get/{id}")
26     public Student get(@PathVariable("id") Integer id);
27      
28     /**
29      * 查询学生信息
30      * @return
31      */
32     @GetMapping(value="/student/list")
33     public List<Student> list();
34      
35     /**
36      * 添加或者修改学生信息
37      * @param student
38      * @return
39      */
40     @PostMapping(value="/student/save")
41     public boolean save(Student student);
42      
43     /**
44      * 根据id删除学生信息
45      * @return
46      */
47     @GetMapping(value="/student/delete/{id}")
48     public boolean delete(@PathVariable("id") Integer id);
49 
50     @RequestMapping("/student/ribbon")
51     public String ribbon();
52 }

    2、新建一个Feign消费者项目；

    参考microservice-student-consumer-80建一个microservice-student-consumer-feign-80

    代码都复制一份，包括pom.xml

    pom.xml

     1 <?xml version="1.0" encoding="UTF-8"?>
 2 <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 3          xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
 4     <modelVersion>4.0.0</modelVersion>
 5     <parent>
 6         <groupId>com.javaqi</groupId>
 7         <artifactId>qimicroservice</artifactId>
 8         <version>1.0-SNAPSHOT</version>
 9     </parent>
10     <artifactId>microservice-student-consumer-feign-80</artifactId>
11 
12     <properties>
13         <java.version>1.8</java.version>
14     </properties>
15     <dependencies>
16         <dependency>
17             <groupId>com.javaqi</groupId>
18             <artifactId>microservice-common</artifactId>
19         </dependency>
20         <dependency>
21             <groupId>org.springframework.boot</groupId>
22             <artifactId>spring-boot-starter-web</artifactId>
23         </dependency>
24         <dependency>
25             <groupId>org.springframework.boot</groupId>
26             <artifactId>spring-boot-starter-test</artifactId>
27             <scope>test</scope>
28         </dependency>
29         <dependency>
30             <groupId>org.springframework.boot</groupId>
31             <artifactId>spring-boot-starter-data-jpa</artifactId>
32         </dependency>
33         <dependency>
34             <groupId>mysql</groupId>
35             <artifactId>mysql-connector-java</artifactId>
36         </dependency>
37         <dependency>
38             <groupId>org.springframework.boot</groupId>
39             <artifactId>spring-boot-starter-tomcat</artifactId>
40         </dependency>
41         <!--  修改后立即生效，热部署  -->
42         <dependency>
43             <groupId>org.springframework</groupId>
44             <artifactId>springloaded</artifactId>
45         </dependency>
46         <dependency>
47             <groupId>org.springframework.boot</groupId>
48             <artifactId>spring-boot-devtools</artifactId>
49         </dependency>
50         <dependency>
51             <groupId>com.javaqi</groupId>
52             <artifactId>microservice-common</artifactId>
53             <version>1.0-SNAPSHOT</version>
54             <scope>compile</scope>
55         </dependency>
56 
57         <!--ribbon相关依赖-->
58         <dependency>
59             <groupId>org.springframework.cloud</groupId>
60             <artifactId>spring-cloud-starter-eureka</artifactId>
61         </dependency>
62         <dependency>
63             <groupId>org.springframework.cloud</groupId>
64             <artifactId>spring-cloud-starter-ribbon</artifactId>
65         </dependency>
66         <dependency>
67             <groupId>org.springframework.cloud</groupId>
68             <artifactId>spring-cloud-starter-config</artifactId>
69         </dependency>
70 
71         <!--引入Feign依赖-->
72         <dependency>
73             <groupId>org.springframework.cloud</groupId>
74             <artifactId>spring-cloud-starter-feign</artifactId>
75         </dependency>
76     </dependencies>
77     <build>
78         <plugins>
79             <plugin>
80                 <groupId>org.springframework.boot</groupId>
81                 <artifactId>spring-boot-maven-plugin</artifactId>
82             </plugin>
83         </plugins>
84     </build>
85 </project>

    SpringCloudConfig.java

     1 package com.javaqi.microservicestudentconsumerfeign80.config;
 2 
 3 import com.netflix.loadbalancer.IRule;
 4 import com.netflix.loadbalancer.RetryRule;
 5 import org.springframework.cloud.client.loadbalancer.LoadBalanced;
 6 import org.springframework.context.annotation.Bean;
 7 import org.springframework.context.annotation.Configuration;
 8 import org.springframework.web.client.RestTemplate;
 9 
10 @Configuration
11 public class SpringCloudConfig {
12 
13     @LoadBalanced  // 引入ribbon负载均衡
14     @Bean
15     public RestTemplate getRestTemplate(){
16         return new RestTemplate();
17     }
18 
19     /**
20      * 自定义调用规则（服务提供者掉线后不再调用，解决轮询问题）
21      * @return
22      */
23     @Bean
24     public IRule myRule(){
25         return new RetryRule();
26 //        return new RandomRule();
27     }
28 }

    yml文件配置

    1 server:
2   port: 80
3   context-path: /
4 eureka:
5   client:
6     service-url:
7       defaultZone: http://eureka2001.javaqi.com:2001/eureka/,http://eureka2002.javaqi.com:2002/eureka/,http://eureka2003.javaqi.com:2003/eureka/
8     register-with-eureka: false

    3、修改启动类名称，和加注解

    启动类名称改下，改成StudentConsumerFeignApplication_80，同时加个注解@EnableFeignClients

     1 package com.javaqi.microservicestudentconsumerfeign80;
 2 
 3 import org.springframework.boot.SpringApplication;
 4 import org.springframework.boot.autoconfigure.SpringBootApplication;
 5 import org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration;
 6 import org.springframework.boot.autoconfigure.orm.jpa.HibernateJpaAutoConfiguration;
 7 import org.springframework.cloud.netflix.eureka.EnableEurekaClient;
 8 import org.springframework.cloud.netflix.feign.EnableFeignClients;
 9 
10 @EnableEurekaClient
11 @EnableFeignClients(value = "com.javaqi.*.*")
12 @SpringBootApplication(exclude={DataSourceAutoConfiguration.class, HibernateJpaAutoConfiguration.class})
13 public class MicroserviceStudentConsumerFeign80Application {
14 
15     public static void main(String[] args) {
16         SpringApplication.run(MicroserviceStudentConsumerFeign80Application.class, args);
17     }
18 
19 }

    StudentConsumerController.java

     1 package com.javaqi.microservicestudentconsumerfeign80.controller;
 2 
 3 import com.javaqi.microservicecommon.entity.Student;
 4 import com.javaqi.microservicecommon.service.StudentClientService;
 5 import org.springframework.beans.factory.annotation.Autowired;
 6 import org.springframework.web.bind.annotation.*;
 7 import org.springframework.web.client.RestTemplate;
 8 
 9 import java.util.List;
10 
11 @RestController
12 @RequestMapping("/student")
13 public class StudentConsumerController {
14 
15     @Autowired
16     private StudentClientService studentClientService;
17 
18     @Autowired
19     private RestTemplate restTemplate;
20 
21     @PostMapping(value = "/save")
22     private boolean save(Student student) {
23         return studentClientService.save(student);
24     }
25 
26     @GetMapping(value = "/list")
27     public List<Student> list() {
28         return studentClientService.list();
29     }
30 
31     @GetMapping(value = "/get/{id}")
32     public Student get(@PathVariable("id") Integer id) {
33         return studentClientService.get(id);
34     }
35 
36     @GetMapping(value = "/delete/{id}")
37     public boolean delete(@PathVariable("id") Integer id) {
38         try {
39             studentClientService.delete(id);
40             return true;
41         } catch (Exception e) {
42             return false;
43         }
44     }
45 
46     @RequestMapping("/ribbon")
47     public String ribbon(){
48         return studentClientService.ribbon();
49     }
50 }


    运行效果没问题，可以试着停到1001服务，当访问1001时它不会服务，重启1001可以继续服务
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  • 原文地址：https://www.cnblogs.com/xcn123/p/12006316.html
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