31.nacos集成Feign和Gatewayspringcloud

一、项目nacos-client-a

1.pom.xml文件

新增了springcloud的依赖

新增了springcloud的依赖管理

 新增了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.  
   <groupId>com.it</groupId>
6.  
   <artifactId>nacos-client-a</artifactId>
7.  
   <version>0.0.1-SNAPSHOT</version>
8.  
   <name>nacos-client-a</name>
9.  
   <description>Demo project for Spring Boot</description>
10.  
     
11.  
    <properties>
12.  
    <java.version>1.8</java.version>
13.  
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
14.  
    <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
15.  
    <spring-boot.version>2.3.12.RELEASE</spring-boot.version>
16.  
    <spring-cloud.version>Hoxton.SR12</spring-cloud.version>
17.  
    <spring-cloud-alibaba.version>2.2.7.RELEASE</spring-cloud-alibaba.version>
18.  
    </properties>
19.  
     
20.  
    <dependencies>
21.  
    <dependency>
22.  
    <groupId>org.springframework.boot</groupId>
23.  
    <artifactId>spring-boot-starter-web</artifactId>
24.  
    </dependency>
25.  
    <dependency>
26.  
    <groupId>com.alibaba.cloud</groupId>
27.  
    <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
28.  
    </dependency>
29.  
     
30.  
    <dependency>
31.  
    <groupId>org.springframework.cloud</groupId>
32.  
    <artifactId>spring-cloud-starter-openfeign</artifactId>
33.  
    </dependency>
34.  
     
35.  
    <dependency>
36.  
    <groupId>org.springframework.boot</groupId>
37.  
    <artifactId>spring-boot-starter-test</artifactId>
38.  
    <scope>test</scope>
39.  
    <exclusions>
40.  
    <exclusion>
41.  
    <groupId>org.junit.vintage</groupId>
42.  
    <artifactId>junit-vintage-engine</artifactId>
43.  
    </exclusion>
44.  
    </exclusions>
45.  
    </dependency>
46.  
    </dependencies>
47.  
     
48.  
    <dependencyManagement>
49.  
    <dependencies>
50.  
    <dependency>
51.  
    <groupId>org.springframework.boot</groupId>
52.  
    <artifactId>spring-boot-dependencies</artifactId>
53.  
    <version>${spring-boot.version}</version>
54.  
    <type>pom</type>
55.  
    <scope>import</scope>
56.  
    </dependency>
57.  
    <dependency>
58.  
    <groupId>com.alibaba.cloud</groupId>
59.  
    <artifactId>spring-cloud-alibaba-dependencies</artifactId>
60.  
    <version>${spring-cloud-alibaba.version}</version>
61.  
    <type>pom</type>
62.  
    <scope>import</scope>
63.  
    </dependency>
64.  
    <dependency>
65.  
    <groupId>org.springframework.cloud</groupId>
66.  
    <artifactId>spring-cloud-dependencies</artifactId>
67.  
    <version>${spring-cloud.version}</version>
68.  
    <type>pom</type>
69.  
    <scope>import</scope>
70.  
    </dependency>
71.  
    </dependencies>
72.  
    </dependencyManagement>
73.  
     
74.  
    <build>
75.  
    <plugins>
76.  
    <plugin>
77.  
    <groupId>org.apache.maven.plugins</groupId>
78.  
    <artifactId>maven-compiler-plugin</artifactId>
79.  
    <version>3.8.1</version>
80.  
    <configuration>
81.  
    <source>1.8</source>
82.  
    <target>1.8</target>
83.  
    <encoding>UTF-8</encoding>
84.  
    </configuration>
85.  
    </plugin>
86.  
    <plugin>
87.  
    <groupId>org.springframework.boot</groupId>
88.  
    <artifactId>spring-boot-maven-plugin</artifactId>
89.  
    <version>2.3.7.RELEASE</version>
90.  
    <configuration>
91.  
    <mainClass>com.it.NacosClientAApplication</mainClass>
92.  
    </configuration>
93.  
    <executions>
94.  
    <execution>
95.  
    <id>repackage</id>
96.  
    <goals>
97.  
    <goal>repackage</goal>
98.  
    </goals>
99.  
    </execution>
100.  
     </executions>
101.  
     </plugin>
102.  
     </plugins>
103.  
     </build>
104.  
      
105.  
     </project>

2.application.yml

3. feign目录下的TestFeign接口

 4.controller目录下的TestController

1.  
   package com.it.controller;
2.  
    
3.  
   import com.it.feigin.TestFeign;
4.  
   import org.springframework.beans.factory.annotation.Autowired;
5.  
   import org.springframework.cloud.client.ServiceInstance;
6.  
   import org.springframework.cloud.client.discovery.DiscoveryClient;
7.  
   import org.springframework.web.bind.annotation.GetMapping;
8.  
   import org.springframework.web.bind.annotation.RestController;
9.  
    
10.  
    import java.util.List;
11.  
    @RestController
12.  
    public class TestController {
13.  
     
14.  
    @Autowired
15.  
    public DiscoveryClient discoveryClient;
16.  
     
17.  
    @Autowired
18.  
    public TestFeign testFeign;
19.  
     
20.  
     
21.  
     
22.  
    @GetMapping("test")
23.  
    public String test(){
24.  
    List<ServiceInstance> instances = discoveryClient.getInstances("nacos-client-b");
25.  
    System.out.println(instances);
26.  
    return testFeign.info();
27.  
    }
28.  
     
29.  
    }

5.主函数启动类

二、项目nacos-client-b

1.pom.xml文件

不需要额外添加springcloud的依赖，使用springcloudalibaba即可

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.  
   <groupId>com.it</groupId>
6.  
   <artifactId>nacos-client-b</artifactId>
7.  
   <version>0.0.1-SNAPSHOT</version>
8.  
   <name>nacos-client-b</name>
9.  
   <description>Demo project for Spring Boot</description>
10.  
     
11.  
    <properties>
12.  
    <java.version>1.8</java.version>
13.  
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
14.  
    <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
15.  
    <spring-boot.version>2.3.12.RELEASE</spring-boot.version>
16.  
    <spring-cloud-alibaba.version>2.2.7.RELEASE</spring-cloud-alibaba.version>
17.  
    </properties>
18.  
     
19.  
    <dependencies>
20.  
    <dependency>
21.  
    <groupId>org.springframework.boot</groupId>
22.  
    <artifactId>spring-boot-starter-web</artifactId>
23.  
    </dependency>
24.  
    <dependency>
25.  
    <groupId>com.alibaba.cloud</groupId>
26.  
    <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
27.  
    </dependency>
28.  
     
29.  
    <dependency>
30.  
    <groupId>org.springframework.boot</groupId>
31.  
    <artifactId>spring-boot-starter-test</artifactId>
32.  
    <scope>test</scope>
33.  
    <exclusions>
34.  
    <exclusion>
35.  
    <groupId>org.junit.vintage</groupId>
36.  
    <artifactId>junit-vintage-engine</artifactId>
37.  
    </exclusion>
38.  
    </exclusions>
39.  
    </dependency>
40.  
    </dependencies>
41.  
     
42.  
    <dependencyManagement>
43.  
    <dependencies>
44.  
    <dependency>
45.  
    <groupId>org.springframework.boot</groupId>
46.  
    <artifactId>spring-boot-dependencies</artifactId>
47.  
    <version>${spring-boot.version}</version>
48.  
    <type>pom</type>
49.  
    <scope>import</scope>
50.  
    </dependency>
51.  
    <dependency>
52.  
    <groupId>com.alibaba.cloud</groupId>
53.  
    <artifactId>spring-cloud-alibaba-dependencies</artifactId>
54.  
    <version>${spring-cloud-alibaba.version}</version>
55.  
    <type>pom</type>
56.  
    <scope>import</scope>
57.  
    </dependency>
58.  
    </dependencies>
59.  
    </dependencyManagement>
60.  
     
61.  
    <build>
62.  
    <plugins>
63.  
    <plugin>
64.  
    <groupId>org.apache.maven.plugins</groupId>
65.  
    <artifactId>maven-compiler-plugin</artifactId>
66.  
    <version>3.8.1</version>
67.  
    <configuration>
68.  
    <source>1.8</source>
69.  
    <target>1.8</target>
70.  
    <encoding>UTF-8</encoding>
71.  
    </configuration>
72.  
    </plugin>
73.  
    <plugin>
74.  
    <groupId>org.springframework.boot</groupId>
75.  
    <artifactId>spring-boot-maven-plugin</artifactId>
76.  
    <version>2.3.7.RELEASE</version>
77.  
    <configuration>
78.  
    <mainClass>com.it.NacosClientBApplication</mainClass>
79.  
    </configuration>
80.  
    <executions>
81.  
    <execution>
82.  
    <id>repackage</id>
83.  
    <goals>
84.  
    <goal>repackage</goal>
85.  
    </goals>
86.  
    </execution>
87.  
    </executions>
88.  
    </plugin>
89.  
    </plugins>
90.  
    </build>
91.  
     
92.  
    </project>

2.application.yml

3.BController

 4.主函数启动类

分别启动项目一和项目二进行测试

只有在同一个命名空间，同一个分组下的项目模块才能互相调用，测试其他情况均不能调用

三、新建gateway模块

 1.pom.xml文件

新增springcloud的依赖

2.application.yml

3.主函数启动类

同时运行三个项目

如果不运行动态路由模块，使用localhost/nacos-client-a会导致页面报错，无法正常访问

 同时启动三个项目

再次访问该路径

 至此，nacos 做注册中心，服务发现，以及远程调用都完成了

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