SpringCloud（3）- Rest环境搭建

总体介绍

1. 数据库：sc01 ， 表dept：

插入一些数据：

2. 父Maven工程：springcloud

3. 父Maven工程下的三个模块：

   springcloud-api【封装整体的entity/公共配置等】

   springcloud-provider-dept-8001【服务提供者】

   springcloud-consumer-dept-80【服务消费者】

版本选择

1. 打开spring官网，找到Spring Cloud ，查看最新版本的Doc

2. 发现最新版本的要spring Boot 2.2.5.RELEASE 即以上

父Maven工程：springcloud

1. 新建一个Maven工程，修改其pom文件，修改打包方式为pom，增加依赖管理，版本管理。

<packaging>pom</packaging>

 <properties>
        <mybatis-version>2.1.2</mybatis-version>
        <druid-version>1.1.20</druid-version>
        <lombok-version>1.16.16</lombok-version>
 </properties>

<dependencyManagement>
    <dependencies>
        <!-- SpringCloud依赖 -->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-dependencies</artifactId>
            <version>Hoxton.SR3</version>
            <type>pom</type>
            <scope>import</scope>
        </dependency>
        <!-- SpringBoot依赖 -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-dependencies</artifactId>
            <version>2.2.5.RELEASE</version>
            <type>pom</type>
            <scope>import</scope>
        </dependency>

        <!-- MyBatis依赖 -->
        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
            <version>${mybatis-version}</version>
        </dependency>

        <!-- Druid依赖 -->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
            <version>${druid-version}</version>
        </dependency>

        <!-- Lombok依赖 -->
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>${lombok-version}</version>
        </dependency>

    </dependencies>
</dependencyManagement>

springcloud-api【封装整体的entity/公共配置等】

1. 在父Maven项目下新建一个Module，创建子Maven项目springcloud-api。
2. 在pom文件中添加依赖。

    <dependencies>

        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
        </dependency>

    </dependencies>

3. 新建entity包，编写实体类Dept。

@Data
@NoArgsConstructor
public class Dept implements Serializable {
    private long deptno;
    private String deptname;
    private String dbSource;
    public Dept(String deptname){
        this.deptname=deptname;
    }
}

springcloud-provider-dept-8001【服务提供者】

1. 在父Maven项目下新建一个Module，创建子Maven项目springcloud-provider-dept-8001。

2. 在pom文件中添加依赖。

 <dependencies>
        <dependency>
            <groupId>com.yinrz</groupId>
            <artifactId>springcloud-api</artifactId>
            <version>0.0.1-SNAPSHOT</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
        </dependency>
        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
        </dependency>
    </dependencies>

3. 修改application.yml文件

server:
  port: 8001

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


spring:
  datasource:
    type: com.alibaba.druid.pool.DruidDataSource
    url: jdbc:mysql://localhost:3306/sc01?useSSL=false&useUnicode=true&characterEncoding=UTF-8&serverTimezone=GMT%2B8
    driver-class-name: com.mysql.cj.jdbc.Driver
    username: root
    password: root

4. 在resources下新建mybatis文件夹，在此文件夹下新建mybatis-config.xml文件。

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE configuration
        PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
    <settings>
        <setting name="cacheEnabled" value="true"/>
        <setting name="mapUnderscoreToCamelCase" value="true"/>
    </settings>
</configuration>

5. 在com.yinrz.springcloud包下新建mapper包，编写DeptMapper

@Mapper
@Repository
public interface DeptMapper {
    List<Dept> selAll();
    Dept selById(long id);
    boolean insDept(Dept dept);
}

6. 在com.yinrz.springcloud包下新建service包与impl包，编写DeptService与DeptServiceImpl

public interface DeptService {
    List<Dept> queryAll();
    Dept queryById(long id);
    boolean addDept(Dept dept);
}

@Service
public class DeptServiceImpl implements DeptService {
    @Resource
    private DeptMapper deptMapper;

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

    public Dept queryById(long id) {
        return deptMapper.selById(id);
    }

    public boolean addDept(Dept dept) {
        return deptMapper.insDept(dept);
    }
}

7. 在resource下的mybaits包下新建文件夹mapper，编写DeptMapper.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.yinrz.springcloud.mapper.DeptMapper">
    <select id="selAll" resultType="com.yinrz.springcloud.entity.Dept" >
        select * from sc01.dept
    </select>
    <select id="selById" resultType="com.yinrz.springcloud.entity.Dept" parameterType="long" >
        select * from sc01.dept where deptno = #{deptno}
    </select>
    <insert id="insDept"  parameterType="com.yinrz.springcloud.entity.Dept" >
        insert into sc01.dept(deptname, db_source) values (#{deptname},DATABASE())
    </insert>
</mapper>

8. 在com.yinrz.springcloud包下新建controller包，编写DeptProviderController

@RestController
public class DeptProviderController {

    @Resource
    DeptService deptServiceImpl;

    @GetMapping("/dept/all")
    public List<Dept> queryAll(){
        return deptServiceImpl.queryAll();
    }
    @PostMapping("/dept/add")
    public boolean addDept(Dept dept){
        return deptServiceImpl.addDept(dept);
    }
    @GetMapping("/dept/get/{id}")
    public Dept queryById(@PathVariable("id") long id){
        return deptServiceImpl.queryById(id);
    }
}

9. 在com.yinrz.springcloud包下编写主启动类DeptProvider_8001

@SpringBootApplication
public class DeptProvider_8001 {
    public static void main(String[] args) {
        SpringApplication.run(DeptProvider_8001.class,args);
    }
}

springcloud-consumer-dept-80【服务消费者】

1. 在父Maven项目下新建一个Module，创建子Maven项目springcloud-consumer-dept-80。

2. 在pom文件中添加依赖。

 <dependencies>

        <dependency>
            <groupId>com.yinrz</groupId>
            <artifactId>springcloud-api</artifactId>
            <version>0.0.1-SNAPSHOT</version>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

    </dependencies>

3. 修改application.yml文件

server:
  port: 80

4. 在com.yinrz.springcloud包下新建config包，编写BeanConfig，配置RestTemplate

@Configuration
public class BeanConfig {
    @Bean
    public RestTemplate restTemplate(){
        return new RestTemplate();
    }
}

5. 在com.yinrz.springcloud包下新建controller包，编写DeptConsumerController

@RestController
public class DeptConsumerController {

    @Resource
    RestTemplate restTemplate;
    private static final String REST_PATH_PREFIX="http://localhost:8001";

    @RequestMapping("/consumer/dept/all")
    public List<Dept> all(){
        return restTemplate.getForObject(REST_PATH_PREFIX+"/dept/all",List.class);
    }
    @RequestMapping("/consumer/dept/get/{id}")
    public Dept get(@PathVariable("id") long id){
        return restTemplate.getForObject(REST_PATH_PREFIX+"/dept/get/"+id,Dept.class);
    }
    @RequestMapping("/consumer/dept/add")
    public boolean add(Dept dept){
        return restTemplate.postForObject(REST_PATH_PREFIX+"/dept/add",dept,Boolean.class);
    }

}

6. 在com.yinrz.springcloud包下编写主启动类DeptConsumer_80

@SpringBootApplication
public class DeptConsumer_80 {
    public static void main(String[] args) {
        SpringApplication.run(DeptConsumer_80.class,args);
    }
}

测试

1. 分别启动DeptProvider_8001，与DeptConsumer_80。
2. 浏览器访问http://localhost/consumer/dept/get/1

浏览器访问http://localhost/consumer/dept/add?deptname=123

浏览器访问http://localhost/consumer/dept/all

SpringCloud(3)-Rest环境搭建

原文：https://www.cnblogs.com/yinrz/p/12748972.html