springcloud快速入門-有解無憂

一、專案思路

使用idea工具創建一個maven空專案，洗掉不需要的src目錄等東西，用來做父專案，只剩下pom.xml檔案
在父專案中依次創建三個模塊module，分別為eruekaservice、provide、consumer三個子專案（springboot專案），
在erueka中添加配置資訊、在啟動類上添加@EnableEurekaServer注解，
在provide中添加配置資訊、在啟動類上添加@EnableEurekaClient注解（consumer的步驟相同），
在provide子專案中創建entity物體類、DAO層、service層、controller層，此處使用mybatis連接資料庫、Druid連接池來連接MySQL（DataSource配置略），
在consumer子專案中創建controller層，使用restTemplate來訪問provide中的api（消費者controller的介面），
專案運行順序，erueka>provide>comsumer，

二、實作步驟

1、創建maven空專案

洗掉不需要的目錄和檔案

2、創建erueka-service

　　選擇需要匯入的模塊（依賴）

<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>com.yiblue</groupId>
    <artifactId>eureka-server</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>eureka-server</name>
    <description>eureka-server</description>
    <properties>
        <java.version>1.8</java.version>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <spring-boot.version>2.3.7.RELEASE</spring-boot.version>
        <spring-cloud.version>Hoxton.SR9</spring-cloud.version>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-server</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
            <exclusions>
                <exclusion>
                    <groupId>org.junit.vintage</groupId>
                    <artifactId>junit-vintage-engine</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
    </dependencies>

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>${spring-cloud.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-dependencies</artifactId>
                <version>${spring-boot.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>

    <build>
        <plugins>
//編譯插件
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.8.1</version>
                <configuration>
                    <source>1.8</source>
                    <target>1.8</target>
                    <encoding>UTF-8</encoding>
                </configuration>
            </plugin>
//maven插件
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <version>2.3.7.RELEASE</version>
                <configuration>
                    <mainClass>com.yiblue.eurekaserver.EurekaServerApplication</mainClass>
                </configuration>
                <executions>
                    <execution>
                        <id>repackage</id>
                        <goals>
                            <goal>repackage</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>
        </plugins>
    </build>
</project>

　　修改組態檔application.yml

server:
  port: 8080
spring:
  application:
    name: eureka-server
eureka:
  instance:
    hostname: localhost
  client:
    register-with-eureka: false
    fetch-registry: false
    service-url:
      defaultZone: http://${eureka.instance.hostname}:${server.port}/eureka/

　　在啟動類EurekaServerApplication 上添加注解：@EnableEurekaServer

@SpringBootApplication
@EnableEurekaServer
public class EurekaServerApplication {
    public static void main(String[] args) {
        SpringApplication.run(EurekaServerApplication.class, args);
    }
}

3、創建provider專案（與erueka一樣，這省略）

pom.xml依賴匯入

<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>com.yiblue</groupId>
    <artifactId>provider-8001</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>provider-8001</name>
    <description>provider-8001</description>

    <properties>
        <java.version>1.8</java.version>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <spring-boot.version>2.3.7.RELEASE</spring-boot.version>
        <spring-cloud.version>Hoxton.SR9</spring-cloud.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
        </dependency>
        <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>2.1.4</version>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <scope>runtime</scope>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</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>
            <exclusions>
                <exclusion>
                    <groupId>org.junit.vintage</groupId>
                    <artifactId>junit-vintage-engine</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
            <version>1.1.17</version>
        </dependency>
    </dependencies>

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>${spring-cloud.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-dependencies</artifactId>
                <version>${spring-boot.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>

    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.8.1</version>
                <configuration>
                    <source>1.8</source>
                    <target>1.8</target>
                    <encoding>UTF-8</encoding>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <version>2.3.7.RELEASE</version>
                <configuration>
                    <mainClass>com.yiblue.provider8001.Provider8001Application</mainClass>
                </configuration>
                <executions>
                    <execution>
                        <id>repackage</id>
                        <goals>
                            <goal>repackage</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>
        </plugins>
    </build>
</project>

　　application.yml修改配置（provider），配置mybatis連接MySQL資訊

spring:
  datasource:
    type: com.alibaba.druid.pool.DruidDataSource
    driver-class-name: com.mysql.cj.jdbc.Driver
    url: jdbc:mysql://localhost:3306/shiro?serverTimezone=UTC&useUnicode=true&characterEncoding=utf8
    username: caidongji
    password: abc123
  application:
    name: provider-8001
eureka:
  client:
    service-url:
      defaultZone: http://localhost:8080/eureka/
server:
  port: 8001
mybatis:
  type-aliases-package: com.yiblue.provider8001.entity
  mapper-locations: classpath:mappers/*xml

　　在啟動類Provider8001Application上添加注解@EnableEurekaClient

@SpringBootApplication
@EnableEurekaClient
public class Provider8001Application {
    public static void main(String[] args) {
        SpringApplication.run(Provider8001Application.class, args);
    }
}

撰寫物體類

@Data
@AllArgsConstructor
@NoArgsConstructor
public class ShiroUser {
    private Integer uid;
    private String uname;
    private String password;
    private String datasource;
}

撰寫介面（這里省略dao，合并到service中了）

@Mapper
@Repository
public interface ShiroUserService {
    @Select("select * from usershiro")
    public List<ShiroUser> selectAll();

    @Select("select * from usershiro where uname=#{uname}")
    public ShiroUser selectOne(String uname);

    @Select("insert into usershiro (uname,password,datasource) values (#{uname},#{password},#{datasource})")
    void insertOne(ShiroUser shiroUser);

    @Select("delete from usershiro where uname=#{uname}")
    void deleteOne(String uname);
}

撰寫controller

@RestController
public class ShiroUserController {
    @Autowired
    ShiroUserService shiroUserService;

    @GetMapping("/getAll")
    public List<ShiroUser> getAll(){
        return shiroUserService.selectAll();
    }

    @GetMapping("/getOne")
    public ShiroUser getOne(String uname){ return shiroUserService.selectOne(uname);}
}

4、創建comsumer專案（與erueka一樣，這省略）

配置依賴，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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>com.yiblue</groupId>
    <artifactId>eureka-server</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>eureka-server</name>
    <description>eureka-server</description>

    <properties>
        <java.version>1.8</java.version>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <spring-boot.version>2.3.7.RELEASE</spring-boot.version>
        <spring-cloud.version>Hoxton.SR9</spring-cloud.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-server</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
            <exclusions>
                <exclusion>
                    <groupId>org.junit.vintage</groupId>
                    <artifactId>junit-vintage-engine</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
    </dependencies>

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>${spring-cloud.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-dependencies</artifactId>
                <version>${spring-boot.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>

    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.8.1</version>
                <configuration>
                    <source>1.8</source>
                    <target>1.8</target>
                    <encoding>UTF-8</encoding>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <version>2.3.7.RELEASE</version>
                <configuration>
                    <mainClass>com.yiblue.eurekaserver.EurekaServerApplication</mainClass>
                </configuration>
                <executions>
                    <execution>
                        <id>repackage</id>
                        <goals>
                            <goal>repackage</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>
        </plugins>
    </build>

</project>

　　修改application.yml檔案

server:
  port: 8080
spring:
  application:
    name: eureka-server
eureka:
  instance:
    hostname: localhost
  client:
    register-with-eureka: false
    fetch-registry: false
    service-url:
      defaultZone: http://${eureka.instance.hostname}:${server.port}/eureka/

　　在啟動類Consumer8002Application上添加注解

@SpringBootApplication
@EnableEurekaClient
public class Consumer8002Application {
    public static void main(String[] args) {
        SpringApplication.run(Consumer8002Application.class, args);
    }
}

　　spring不會自動裝配restTemplate，需要配置類注入容器中

@Configuration
public class restTemplateconfig {

    @Bean
//    @LoadBalanced
    RestTemplate restTemplate(){ return new RestTemplate();}
}

　　創建controller類，呼叫提供者的api

@RestController
public class ShiroUserController {
    @Resource
    RestTemplate restTemplate;

    @GetMapping("/findAll")
    public List<ShiroUser> findAll(){
        return restTemplate.getForObject("http://localhost:8001/getAll", List.class);
    }
}

5、專案運行順序：erueka>provider>consumer

在瀏覽器中訪問：localhost:8002/findAll

6、end

轉載請註明出處，本文鏈接：https://www.uj5u.com/houduan/509405.html

標籤：Java

上一篇：Spring（八）：Bean的作用域

下一篇：【微服務】- 服務呼叫 - OpenFeign