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springcloud前言（服务提供者和服务消费者）

最后的目录结构就是这样

1、新建父工程 kaka-springcloud-kuang

创建一个普通maven项目（不需要选择archetype，然后把相应的groupId和artifactId写上）；

添加maven依赖，由于是父工程，那么直接管理maven版本即可（引入需要的依赖）。

<?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.zhang</groupId>
    <artifactId>kaka-springcloud-kuang</artifactId>
    <version>1.0-SNAPSHOT</version>
    <modules>
        <module>springcloud-api</module>
        <module>springcloud-provider-dept-8001</module>
        <module>springcloud-consumer-dept-80</module>
    </modules>
    <packaging>pom</packaging>
    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <maven.compiler.source>1.8</maven.compiler.source>
        <maven.compiler.target>1.8</maven.compiler.target>
    </properties>

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>Hoxton.SR8</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-dependencies</artifactId>
                <version>2.3.3.RELEASE</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
            <dependency>
                <groupId>mysql</groupId>
                <artifactId>mysql-connector-java</artifactId>
                <version>5.1.47</version>
            </dependency>
            <dependency>
                <groupId>com.alibaba</groupId>
                <artifactId>druid</artifactId>
                <version>1.1.10</version>
            </dependency>
            <dependency>
                <groupId>org.mybatis.spring.boot</groupId>
                <artifactId>mybatis-spring-boot-starter</artifactId>
                <version>1.3.2</version>
            </dependency>
            <dependency>
                <groupId>ch.qos.logback</groupId>
                <artifactId>logback-core</artifactId>
                <version>1.2.3</version>
            </dependency>
            <dependency>
                <groupId>junit</groupId>
                <artifactId>junit</artifactId>
                <version>4.12</version>
                <scope>test</scope>
            </dependency>
            <dependency>
                <groupId>log4j</groupId>
                <artifactId>log4j</artifactId>
                <version>1.2.12</version>
            </dependency>
            <dependency>
                <groupId>org.projectlombok</groupId>
                <artifactId>lombok</artifactId>
                <version>1.18.20</version>
            </dependency>
        </dependencies>
    </dependencyManagement>
</project>

2、新建 springcloud-api

创建一个普通maven项目（同上）；
引入需要的依赖

<?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">
    <parent>
        <artifactId>kaka-springcloud-kuang</artifactId>
        <groupId>com.zhang</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>springcloud-api</artifactId>

    <!--当前的module自己需要的依赖，如果父依赖中已经配置了版本，这里就不用写了。-->
    <dependencies>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
        </dependency>
    </dependencies>
</project>

创建Dept.java

package com.zhang.springcloud.pojo;
import lombok.Data;
import lombok.NoArgsConstructor;
import lombok.experimental.Accessors;

import java.io.Serializable;

/**
 * @auther kaka
 * @create 2021-04-02 22:06
 */
@Data
@NoArgsConstructor
@Accessors(chain = true)//开启链式写法
public class Dept implements Serializable {

    private Long deptno;
    private String dname;
    /**
     * 这个数据是存在哪个数据库的字段，微服务，
     * 一个服务对应一个数据库，同一个信息可能存在不同的数据库
     */
    private String db_source;

    public Dept(String dname) {
        this.dname = dname;
    }
}

3、新建服务提供者 springcloud-provider-dept-8001

创建一个普通maven项目（同上）；
引入依赖（不需要添加版本号，因为父工程已经管理版本号）；

<?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">
    <parent>
        <artifactId>kaka-springcloud-kuang</artifactId>
        <groupId>com.zhang</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>springcloud-provider-dept-8001</artifactId>

    <dependencies>
        <dependency>
            <groupId>com.zhang</groupId>
            <artifactId>springcloud-api</artifactId>
            <version>1.0-SNAPSHOT</version>
        </dependency>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
        </dependency>
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
        </dependency>
        <dependency>
            <groupId>ch.qos.logback</groupId>
            <artifactId>logback-core</artifactId>
        </dependency>
        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-test</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>
            <optional>true</optional>
            <scope>true</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-jetty</artifactId>
        </dependency>
    </dependencies>
</project>

编写application.yml；

spring:
  devtools:
    restart:
      enabled: true
      additional-paths: src/main/java,src/main/resources
  application:
    name: springcloud-provider-dept
  datasource:
    type: com.alibaba.druid.pool.DruidDataSource
    driver-class-name: org.gjt.mm.mysql.Driver
    url: jdbc:mysql://localhost:3306/db01?useUnicode=true&characterEncoding=utf-8&useSSL=false
    username: root
    password: love123

server:
  port: 8001

mybatis:
  type-aliases-package: com.zhang.springcloud.pojo
  config-location: classpath:mybatis/mybatis-config.xml
  mapper-locations: classpath:mybatis/mapper/*.xml

目录结构如下；
编写DeptMapper.java；

@Mapper
@Repository
public interface DeptMapper {

    boolean addDept(Dept dept);
    Dept queryById(Long id);
    List<Dept> queryAll();
}

编写DeptServiceImpl.java；

@Service
public class DeptServiceImpl implements DeptService{

    @Autowired
    private DeptMapper deptMapper;
    @Override
    public boolean addDept(Dept dept) {
        return deptMapper.addDept(dept);
    }

    @Override
    public Dept queryById(Long id) {
        return deptMapper.queryById(id);
    }

    @Override
    public List<Dept> queryAll() {
        return deptMapper.queryAll();
    }
}

编写DeptController.java；

@RestController
@RequestMapping("/dept")
public class DeptController {

    @Autowired
    private DeptService deptService;

    @PostMapping("/add")
    public boolean addDept(@RequestBody Dept dept){
        return deptService.addDept(dept);
    }

    @GetMapping("/get/{id}")
    public Dept getDept(@PathVariable("id") Long id){
        return deptService.queryById(id);
    }

    @GetMapping("/list")
    public List<Dept> queryAll(){
        return deptService.queryAll();
    }
}

测试访问以下；

4、新建服务消费者 springcloud-consumer-dept-80

前几步省略；
maven依赖；

<?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">
    <parent>
        <artifactId>kaka-springcloud-kuang</artifactId>
        <groupId>com.zhang</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>springcloud-consumer-dept-80</artifactId>

    <dependencies>
        <dependency>
            <groupId>com.zhang</groupId>
            <artifactId>springcloud-api</artifactId>
            <version>1.0-SNAPSHOT</version>
        </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>
            <optional>true</optional>
            <scope>true</scope>
        </dependency>
    </dependencies>
</project>

application.yml只配置端口即可；
注入RestTemplate，为了调用服务端；

@Configuration
public class ConfigBean {

    @Bean
    public RestTemplate getRestTemplate(){
        return new RestTemplate();
    }
}

编写ConsumerController.java；

@RestController
@RequestMapping("/consumer")
public class DeptConsumerController {

    /**
     * 需要提前配置bean
     */
    @Autowired
    private RestTemplate restTemplate;

    private static final String REST_URL_PREFIX = "http://localhost:8001/";

    @RequestMapping("/get/{id}")
    public ResponseEntity<Dept> get(@PathVariable("id") Long id){
        return restTemplate.getForEntity(REST_URL_PREFIX + "/dept/get/"+id,Dept.class);
        //return restTemplate.getForObject(REST_URL_PREFIX + "/dept/get/"+id,Dept.class);
    }

    @RequestMapping("/add")
    public ResponseEntity<Boolean> add(Dept dept){
        return restTemplate.postForEntity(REST_URL_PREFIX + "/dept/add",dept,Boolean.class);
        //return restTemplate.postForObject(REST_URL_PREFIX + "/dept/add",dept,Boolean.class);
    }

    @RequestMapping("/list")
    public ResponseEntity<List> list(){
        return restTemplate.getForEntity(REST_URL_PREFIX + "/dept/list",List.class);
        //return restTemplate.getForObject(REST_URL_PREFIX + "/dept/list",List.class);
    }
}

目录结构；
测试访问；

=============================================================================
至此restful服务端和客户端搭建成功。

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原文地址：https://www.cnblogs.com/kaka-qiqi/p/14615440.html