• SpringCloud01：SpringCloud介绍、服务提供者、服务消费者

    SpringCloud和SpringBoot的关系

    SpringBoot专注于快速、方便地开发单个个体微服务，SpringCloud关注全局的治理框架，它将SpringBoot开发的一个个单体微服务整合并管理起来，为各个微服务之间提供：管理配置、服务发现、断路器、路由、微代理、事件总线、全局锁、决策竞选、分布式会话等等集成服务

    SpringCloud

    SpringCloud和Dubbo的最大区别：SpringCloud抛弃了Dubbo的RPC通信，采用的是基于HTTP的REST方式

    自学网站

    Spring Cloud Netfix：Spring Cloud Netflix【spring cloud中文版】--spring cloud中文文档

    中文API文档：Spring Cloud Dalston 中文文档 参考手册 中文版

    SpringCloud中国社区：Spring Cloud中国社区

    SpringCloud中文网：Spring Cloud中文网-官方文档中文版

    SpringCloud版本选择

    版本说明

     实际开发版本关系

    创建父工程

    创建一个maven工程，去掉src目录

    配置pom.xml

    1. <?xml version="1.0" encoding="UTF-8"?>
    2. <project xmlns="http://maven.apache.org/POM/4.0.0"
    3.          xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    4.          xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    5.     <modelVersion>4.0.0</modelVersion>
    6.  
    7.     <groupId>org.example</groupId>
    8.     <artifactId>SpringCloud</artifactId>
    9.     <version>1.0-SNAPSHOT</version>
    10.  
    11.     <!--打包方式 pom-->
    12.     <packaging>pom</packaging>
    13.  
    14.     <properties>
    15.         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    16.         <maven.compiler.source>1.8</maven.compiler.source>
    17.         <maven.compiler.target>1.8</maven.compiler.target>
    18.         <junit.version>4.12</junit.version>
    19.         <log4j.version>1.2.17</log4j.version>
    20.         <lombok.version>1.16.18</lombok.version>
    21.     </properties>
    22.  
    23.     <dependencyManagement>
    24.         <dependencies>
    25.             <!--springCloud的依赖-->
    26.             <dependency>
    27.                 <groupId>org.springframework.cloud</groupId>
    28.                 <artifactId>spring-cloud-dependencies</artifactId>
    29.                 <version>Greenwich.SR1</version>
    30.                 <type>pom</type>
    31.                 <scope>import</scope>
    32.             </dependency>
    33.             <!--SpringBoot-->
    34.             <dependency>
    35.                 <groupId>org.springframework.boot</groupId>
    36.                 <artifactId>spring-boot-dependencies</artifactId>
    37.                 <version>2.1.4.RELEASE</version>
    38.                 <type>pom</type>
    39.                 <scope>import</scope>
    40.             </dependency>
    41.             <!--数据库-->
    42.             <dependency>
    43.                 <groupId>mysql</groupId>
    44.                 <artifactId>mysql-connector-java</artifactId>
    45.                 <version>5.1.47</version>
    46.             </dependency>
    47.             <dependency>
    48.                 <groupId>com.alibaba</groupId>
    49.                 <artifactId>druid</artifactId>
    50.                 <version>1.1.10</version>
    51.             </dependency>
    52.             <!--SpringBoot 启动器-->
    53.             <dependency>
    54.                 <groupId>org.mybatis.spring.boot</groupId>
    55.                 <artifactId>mybatis-spring-boot-starter</artifactId>
    56.                 <version>1.3.2</version>
    57.             </dependency>
    58.             <!--日志测试~-->
    59.             <dependency>
    60.                 <groupId>ch.qos.logback</groupId>
    61.                 <artifactId>logback-core</artifactId>
    62.                 <version>1.2.3</version>
    63.             </dependency>
    64.             <dependency>
    65.                 <groupId>junit</groupId>
    66.                 <artifactId>junit</artifactId>
    67.                 <version>${junit.version}</version>
    68.             </dependency>
    69.             <dependency>
    70.                 <groupId>log4j</groupId>
    71.                 <artifactId>log4j</artifactId>
    72.                 <version>${log4j.version}</version>
    73.             </dependency>
    74.             <dependency>
    75.                 <groupId>org.projectlombok</groupId>
    76.                 <artifactId>lombok</artifactId>
    77.                 <version>${lombok.version}</version>
    78.             </dependency>
    79.         </dependencies>
    80.     </dependencyManagement>
    81. </project>

    服务提供者

    一、创建子module1（springcloud-api）

    1、创建数据库

    1. create database db01
    2. use db01
    3.  
    4. create table dept(
    5. 	deptno int primary key not null auto_increment,
    6. 	dname varchar(20),
    7. 	db_source varchar(20)
    8. )
    9.  
    10. insert into dept(dname,db_source) values('开发部',DATABASE());
    11. insert into dept(dname,db_source) values('销售部',DATABASE());
    12. insert into dept(dname,db_source) values('运维部',DATABASE());
    13. insert into dept(dname,db_source) values('测试部',DATABASE());
    14. insert into dept(dname,db_source) values('财务部',DATABASE());

    2、创建实体类

    1. @Data
    2. @NoArgsConstructor
    3. @Accessors(chain = true) //链式写法
    4. public class Dept implements Serializable {
    5.     private Integer deptno;
    6.     private String dname;
    7.     //表示这个数据是存在哪个数据库的字段
    8.     //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
    9.     private String dbSource;
    10.  
    11.     public Dept(String dname) {
    12.         this.dname = dname;
    13.     }
    14. }

    二、创建子模块2（springcloud-provider-dept-8081）

    1、pom.xml

    1. <?xml version="1.0" encoding="UTF-8"?>
    2. <project xmlns="http://maven.apache.org/POM/4.0.0"
    3.          xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    4.          xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    5.     <parent>
    6.         <artifactId>SpringCloud</artifactId>
    7.         <groupId>org.example</groupId>
    8.         <version>1.0-SNAPSHOT</version>
    9.     </parent>
    10.     <modelVersion>4.0.0</modelVersion>
    11.  
    12.     <artifactId>springcloud-provider-dept-8001</artifactId>
    13.  
    14.     <dependencies>
    15.         <!--我们需要拿到实体类，所以要配置api module-->
    16.         <dependency>
    17.             <groupId>org.example</groupId>
    18.             <artifactId>springcloud-api</artifactId>
    19.             <version>1.0-SNAPSHOT</version>
    20.         </dependency>
    21.         <!--导入父工程的依赖-->
    22.         <dependency>
    23.             <groupId>junit</groupId>
    24.             <artifactId>junit</artifactId>
    25.             <scope>test</scope>
    26.         </dependency>
    27.         <dependency>
    28.             <groupId>mysql</groupId>
    29.             <artifactId>mysql-connector-java</artifactId>
    30.         </dependency>
    31.         <dependency>
    32.             <groupId>com.alibaba</groupId>
    33.             <artifactId>druid</artifactId>
    34.         </dependency>
    35.         <dependency>
    36.             <groupId>ch.qos.logback</groupId>
    37.             <artifactId>logback-core</artifactId>
    38.         </dependency>
    39.         <dependency>
    40.             <groupId>org.mybatis.spring.boot</groupId>
    41.             <artifactId>mybatis-spring-boot-starter</artifactId>
    42.         </dependency>
    43.         <!--test-->
    44.         <dependency>
    45.             <groupId>org.springframework.boot</groupId>
    46.             <artifactId>spring-boot-test</artifactId>
    47.         </dependency>
    48.         <dependency>
    49.             <groupId>org.springframework.boot</groupId>
    50.             <artifactId>spring-boot-starter-web</artifactId>
    51.         </dependency>
    52.         <!--jetty-->
    53.         <dependency>
    54.             <groupId>org.springframework.boot</groupId>
    55.             <artifactId>spring-boot-starter-jetty</artifactId>
    56.         </dependency>
    57.         <!--热部署工具-->
    58.         <dependency>
    59.             <groupId>org.springframework.boot</groupId>
    60.             <artifactId>spring-boot-devtools</artifactId>
    61.         </dependency>
    62.         <dependency>
    63.             <groupId>org.example</groupId>
    64.             <artifactId>springcloud-api</artifactId>
    65.             <version>1.0-SNAPSHOT</version>
    66.             <scope>compile</scope>
    67.         </dependency>
    68.     </dependencies>
    69. </project>

    2、Dao

    ①DeptDao

    1. @Mapper
    2. @Repository
    3. public interface DeptDao {
    4.     public Integer addDept(Dept dept);
    5.     public Dept queryById(Integer deptno);
    6.     public List queryAll();
    7. }

    ②DeptMapper.xml

    1. <?xml version="1.0" encoding="UTF-8" ?>
    2. <!DOCTYPE mapper
    3.         PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
    4.         "https://mybatis.org/dtd/mybatis-3-mapper.dtd">
    5. <mapper namespace="com.springcloud.dao.DeptDao">
    6.     <resultMap id="DeptMap" type="Dept">
    7.         <id property="deptno" column="deptno"></id>
    8.         <result property="dname" column="dname"></result>
    9.         <result property="dbSource" column="db_source"></result>
    10.     </resultMap>
    11.  
    12.    <insert id="addDept" parameterType="Dept">
    13.        insert into dept(dname, db_source) values(#{dname}, DATABASE())
    14.    </insert>
    15.  
    16.     <select id="queryById" parameterType="Integer"  resultMap="DeptMap">
    17.         select * from dept where deptno = #{deptno}
    18.     </select>
    19.  
    20.     <select id="queryAll"  resultMap="DeptMap">
    21.         select * from dept
    22.     </select>
    23. </mapper>

    3、application.xml

    1. server:
    2.   port: 8001
    3.  
    4. #mybatis配置
    5. mybatis:
    6.   type-aliases-package: com.springcloud.pojo
    7.   mapper-locations: classpath:mybatis/mapper/*.xml
    8.  
    9. #spring配置
    10. spring:
    11.   application:
    12.     name: springcloud-provider-dept
    13.   datasource:
    14.     type: com.alibaba.druid.pool.DruidDataSource
    15.     drive-class-name: org.gjt.mm.mysql.Driver
    16.     url: jdbc:mysql://localhost:3306/db01?useSSL=false&useUnicode=true&characterEncoding=UTF-8&serverTimezone=GMT%2B8
    17.     username: root
    18.     password: 123456

    4、service

    ①DeptService

    1. public interface DeptService {
    2.     public Integer addDept(Dept dept);
    3.     public Dept queryById(Integer deptno);
    4.     public List queryAll();
    5. }

    ②DeptServiceImpl

    1. @Service
    2. public class DeptServiceImpl implements DeptService {
    3.     @Autowired
    4.     private DeptDao deptDao;
    5.  
    6.     @Override
    7.     public Integer addDept(Dept dept) {
    8.         return deptDao.addDept(dept);
    9.     }
    10.  
    11.     @Override
    12.     public Dept queryById(Integer deptno) {
    13.         return deptDao.queryById(deptno);
    14.     }
    15.  
    16.     @Override
    17.     public List<Dept> queryAll() {
    18.         return deptDao.queryAll();
    19.     }
    20. }

    5、controller

    1. @RestController
    2. public class DeptController {
    3.     @Autowired
    4.     private DeptService deptService;
    5.  
    6.     @PostMapping("/dept/add")
    7.     public Integer addDept(Dept dept){
    8.         return deptService.addDept(dept);
    9.     }
    10.  
    11.     @GetMapping("/dept/get/{deptno}")
    12.     public Dept queryById(@PathVariable("deptno") Integer deptno){
    13.         return deptService.queryById(deptno);
    14.     }
    15.  
    16.     @GetMapping("/dept/list")
    17.     public List queryAll(){
    18.         return deptService.queryAll();
    19.     }
    20. }

    6、主启动类

    1. //启动类
    2. @SpringBootApplication
    3. public class DeptProvider_8001 {
    4.     public static void main(String[] args){
    5.         SpringApplication.run(DeptProvider_8001.class,args);
    6.     }
    7. }

    服务消费者

    三、创建子模块3（springcloud-consumer-dept-80）

    1、pom.xml

    1. <?xml version="1.0" encoding="UTF-8"?>
    2. <project xmlns="http://maven.apache.org/POM/4.0.0"
    3.          xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    4.          xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    5.     <parent>
    6.         <artifactId>SpringCloud</artifactId>
    7.         <groupId>org.example</groupId>
    8.         <version>1.0-SNAPSHOT</version>
    9.     </parent>
    10.     <modelVersion>4.0.0</modelVersion>
    11.  
    12.     <artifactId>springcloud-consumer-dept-80</artifactId>
    13.  
    14.     <!--实体类+web-->
    15.     <dependencies>
    16.         <dependency>
    17.             <groupId>org.example</groupId>
    18.             <artifactId>springcloud-api</artifactId>
    19.             <version>1.0-SNAPSHOT</version>
    20.         </dependency>
    21.         <dependency>
    22.             <groupId>org.springframework.boot</groupId>
    23.             <artifactId>spring-boot-starter-web</artifactId>
    24.         </dependency>
    25.         <dependency>
    26.             <groupId>org.springframework.boot</groupId>
    27.             <artifactId>spring-boot-devtools</artifactId>
    28.         </dependency>
    29.     </dependencies>
    30.  
    31. </project>

    2、 application.xml

    1. server:
    2.   port: 8080

    3、ConfigBean（用来注册RestTemplate的Bean）

    1. @Configuration
    2. public class ConfigBean {
    3.     @Bean
    4.     public RestTemplate getRestTemplate(){
    5.         return new RestTemplate();
    6.     }
    7. }

    4、controller

    1. @RestController
    2. public class DeptConsumerController {
    3.     //理解：消费者，不应该有service
    4.     @Autowired
    5.     private RestTemplate restTemplate;  //提供多种便捷访问远程http服务的方法，简单的Restful服务模板
    6.  
    7.     private static final String REST_URL_PREFIX = "http://localhost:8001";
    8.  
    9.     @RequestMapping("/consumer/dept/add")
    10.     public Integer addDept(Dept dept){
    11.         return restTemplate.postForObject(REST_URL_PREFIX+"/dept/add", dept,Integer.class);
    12.     }
    13.  
    14.     @RequestMapping("/consumer/dept/get/{deptno}")
    15.     public Dept queryById(@PathVariable("deptno") Integer deptno){
    16.         return restTemplate.getForObject(REST_URL_PREFIX + "/dept/get/" + deptno, Dept.class);
    17.     }
    18.  
    19.     @RequestMapping("/consumer/dept/list")
    20.     public List list(){
    21.         return restTemplate.getForObject(REST_URL_PREFIX + "/dept/list", List.class);
    22.     }
    23. }

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  • 原文地址：https://blog.csdn.net/qq_55137734/article/details/131031460