rest微服务案例

1、搭建环境

IDEA + SpringBoot + SpringCloud

2、整体结构

3、搭建步骤

3.1创建主工程 microservicecloud

3.1.1 pom.xml文件配置

<?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>top.wyyblog.springcloud</groupId>
    <artifactId>microservicecloud</artifactId>
    <version>1.0-SNAPSHOT</version>
    <modules>
        <module>microservicecloud-api</module>
        <module>microservicecloud-provider-dept-8001</module>
        <module>microservicecloud-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>
        <junit.version>4.12</junit.version>
        <log4j.version>1.2.17</log4j.version>
        <lombok.version>1.6.18</lombok.version>
    </properties>

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>Camden.SR7</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>

            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-dependencies</artifactId>
                <version>1.5.9.RELEASE</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>

            <dependency>
                <groupId>org.mybatis.spring.boot</groupId>
                <artifactId>mybatis-spring-boot-starter</artifactId>
                <version>1.3.0</version>
            </dependency>

            <dependency>
                <groupId>mysql</groupId>
                <artifactId>mysql-connector-java</artifactId>
                <version>5.1.38</version>
            </dependency>

            <dependency>
                <groupId>com.alibaba</groupId>
                <artifactId>druid</artifactId>
                <version>1.0.31</version>
            </dependency>

            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter</artifactId>
                <version>1.5.9.RELEASE</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>${junit.version}</version>
                <scope>test</scope>
            </dependency>

            <dependency>
                <groupId>log4j</groupId>
                <artifactId>log4j</artifactId>
                <version>${log4j.version}</version>
            </dependency>

        </dependencies>
    </dependencyManagement>
</project>

3.2 创建公共Model：microservicecloud-api

3.2.1 pom.xml 文件配置

<?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>microservicecloud</artifactId>
        <groupId>top.wyyblog.springcloud</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>microservicecloud-api</artifactId>


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

</project>

3.2.2 创建 公共api 类 top.wyyblog.springcloud.entity.Dept.java

//使用lombok 注解创建 构造 setter getter
@AllArgsConstructor
@NoArgsConstructor
@Data
@Accessors(chain = true)
public class Dept implements Serializable { //使用微服务时要序列化接口

    private Long deptno; //主键
    private String dname; //部门名称
    //来自哪个数据库，因为微服务架构可以一个服务对应一个数据库，同一个信息储存到不同的数据库
    private String db_source;


}

3.3 创建微服务的提供者 Model microservicecloud-provider-dept-8001

3.3.1 pom.xml 文件配置

<?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>microservicecloud</artifactId>
        <groupId>top.wyyblog.springcloud</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>microservicecloud-provider-dept-8001</artifactId>
    <description>部门服务的提供者</description>

    <dependencies>
        <dependency>
            <groupId>top.wyyblog.springcloud</groupId>
            <artifactId>microservicecloud-api</artifactId>
            <version>1.0-SNAPSHOT</version>
        </dependency>

        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
        </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.springframework.boot</groupId>
            <artifactId>spring-boot-starter</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-starter-jetty</artifactId>
        </dependency>

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

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
        </dependency>
        <!--热部署-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-loader-tools</artifactId>
        </dependency>

    </dependencies>

</project>

3.3.2 application.yml 文件配置

server:
  port: 8001

mybatis:
  config-location: classpath:mybatis/mybatis.cfg.xml #mybatis配置文件所在路径
  type-aliases-package: top.wyyblog.springcloud.entity #所有entity别名类所在包
  mapper-locations:
  - classpath:mybatis/mapper/**/*.xml #mapper映射文件
spring:
  application:
    name: microservicecloud-dept
  datasource:
    type: com.alibaba.druid.pool.DruidDataSource #当前数据源操作类型
    driver-class-name: org.gjt.mm.mysql.Driver
    url: jdbc:mysql://localhost:3306/clouddb01
    username: root
    password: 123
    dbcp2:
      min-idle: 5 # 数据库连接池最小维持连接数
      initial-size: 5 #初始化连接数
      max-idle: 5 # 最大连接数
      max-wait-millis: 200 # 等待链接回去的最大超时时间

3.3.3 mybatis/mybatis.cfg.xml 文件配置

<?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>
        <!--二级缓存开启-->
        <setting name="cacheEnabled" value="true"></setting>
    </settings>
</configuration>

3.3.4 mybatis/mapper/DeptMapper.xml 文件配置

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper
        PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="top.wyyblog.springcloud.dao.DeptDao">

    <select id="findById" resultType="Dept" parameterType="Long">
        select deptno,dname,db_source from dept where deptno = #{deptno}
    </select>

    <select id="findAll" resultType="Dept">
        select deptno,dname,db_source from dept
    </select>

    <insert id="addDept" parameterType="Dept">
        insert into dept (dname,db_source) values ( #{dname} , DATABASE())
    </insert>
</mapper>

3.3.5 top.wyyblog.springcloud.dao.DeptDao 文件配置

@Mapper
public interface DeptDao {

    public boolean addDept(Dept dept);

    public Dept findById(Long id);

    public List<Dept> findAll();
}

3.3.6 top.wyyblog.springcloud.service.DeptService 文件配置

public interface DeptService {

    public boolean add(Dept dept);

    public Dept get(Long id);

    public List<Dept> list();
}

3.3.7 top.wyyblog.springcloud.service.impl.DeptServiceImpl 文件配置

@Service
public class DeptServiceImpl  implements DeptService{

    @Autowired
    private DeptDao deptDao;


    @Override
    public boolean add(Dept dept) {
        return deptDao.addDept(dept);
    }

    @Override
    public Dept get(Long id) {
        return deptDao.findById(id);
    }

    @Override
    public List<Dept> list() {
        return deptDao.findAll();
    }
}

3.3.7 top.wyyblog.springcloud.controller.DeptController 文件配置

@RestController
public class DeptController {

    @Autowired
    private DeptService deptService;

    @RequestMapping(value = "/dept/add", method = RequestMethod.POST)
    public boolean add(@RequestBody Dept dept){
        return deptService.add(dept);
    }

    @RequestMapping(value = "/dept/get/{id}", method = RequestMethod.GET)
    public Dept get(@PathVariable Long id){
        return deptService.get(id);
    }

    @RequestMapping(value = "/dept/list", method = RequestMethod.GET)
    public List<Dept> get(){
        return deptService.list();
    }
}

3.3.8 springboot 启动器略

3.4 创建消费者Model microservicecloud-consumer-dept-80

3.4.1 pom.xml 配置

<?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>microservicecloud</artifactId>
        <groupId>top.wyyblog.springcloud</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>microservicecloud-consumer-dept-80</artifactId>
    <description>部门服务的消费者</description>

    <dependencies>
        <dependency>
            <groupId>top.wyyblog.springcloud</groupId>
            <artifactId>microservicecloud-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-loader-tools</artifactId>
        </dependency>

    </dependencies>

</project>

3.4.2 application.yml 配置

server:
  port: 80

3.4.3 注册applicationContext配置top.wyyblog.springcloud.cfgbean.ConfigBean

@Configuration
public class ConfigBean {

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

3.4.4 top.wyyblog.springcloud.controller.DeptController_Consumer 配置

@RestController
public class DeptController_Consumer {

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

    @Autowired
    private RestTemplate restTemplate;

    @RequestMapping("/consumer/dept/add")
    public boolean add(Dept dept){
        return restTemplate.postForObject(REST_URL_PREFIX+"/dept/add",dept,Boolean.class);
    }

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

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

3.4.5 启动器 略

4、运行测试

启动 8001 端口 和 80 端口 访问 http://localhost/consumer/dept/list
运行结果：