SpringCloud服务拆分实践

其他 2021-03-21 13:07:45 阅读次数: 0

SpringCloud服务拆分实践


关于为什么要拆分与什么情况需要拆分，我在这里不再说明，读者可以自行网上找答案。

1、新建一个普通的maven项目 springcloud

编写pom.xml文件

<?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>org.example</groupId>
    <artifactId>springcloud</artifactId>
    <packaging>pom</packaging>
    <version>1.0-SNAPSHOT</version>
    <modules>
        <module>springcloud-api</module>
        <module>springcloud-provier-user-8001</module>
        <module>springcloud-consumer-user-80</module>
    </modules>

    <dependencyManagement>
        <dependencies>
            <!-- springCloud依赖 -->
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>Greenwich.SR1</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>

            <!-- springboot -->
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-dependencies</artifactId>
                <version>2.3.5.RELEASE</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>

            <!--druid-->
            <dependency>
                <groupId>com.alibaba</groupId>
                <artifactId>druid</artifactId>
                <version>1.1.18</version>
            </dependency>

            <!-- 数据库驱动 -->
            <dependency>
                <groupId>mysql</groupId>
                <artifactId>mysql-connector-java</artifactId>
                <version>8.0.21</version>
            </dependency>

            <!-- lombok -->
            <dependency>
                <groupId>org.projectlombok</groupId>
                <artifactId>lombok</artifactId>
                <version>1.18.18</version>
            </dependency>

            <!-- mybatis_plus -->
            <dependency>
                <groupId>com.baomidou</groupId>
                <artifactId>mybatis-plus-boot-starter</artifactId>
                <version>3.0.5</version>
            </dependency>

            <!-- Velocity -->
            <dependency>
                <groupId>org.apache.velocity</groupId>
                <artifactId>velocity-engine-core</artifactId>
                <version>2.0</version>
            </dependency>

            <!-- swagger2 -->
            <dependency>
                <groupId>io.springfox</groupId>
                <artifactId>springfox-swagger2</artifactId>
                <version>2.7.0</version>
            </dependency>

            <!-- junit -->
            <dependency>
                <groupId>junit</groupId>
                <artifactId>junit</artifactId>
                <version>4.13.1</version>
                <scope>test</scope>
            </dependency>

            <!-- log4j -->
            <dependency>
                <groupId>log4j</groupId>
                <artifactId>log4j</artifactId>
                <version>1.2.12</version>
            </dependency>

            <!-- 日志测试 -->
            <dependency>
                <groupId>ch.qos.logback</groupId>
                <artifactId>logback-core</artifactId>
                <version>1.2.3</version>
            </dependency>
        </dependencies>

    </dependencyManagement>

</project>

2、新建一个maven项目，springcloud-api子模块

这个模块用来放实体类

1. 编写pom.xml文件

<?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>springcloud</artifactId>
        <groupId>org.example</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>springcloud-api</artifactId>

<dependencies>
    <!-- lombok -->
    <dependency>
        <groupId>org.projectlombok</groupId>
        <artifactId>lombok</artifactId>
        <version>1.18.18</version>
    </dependency>

    <!-- mybatis_plus -->
    <dependency>
        <groupId>com.baomidou</groupId>
        <artifactId>mybatis-plus-boot-starter</artifactId>
        <version>3.0.5</version>
    </dependency>
</dependencies>
</project>

2. 编写User实体类

如果，那些注释不会，可以去百度找一个mybatis的文档

package com.hzxy.springcloud.model;

import com.baomidou.mybatisplus.annotation.FieldFill;
import com.baomidou.mybatisplus.annotation.TableField;
import com.baomidou.mybatisplus.annotation.TableLogic;
import com.baomidou.mybatisplus.annotation.Version;
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
import lombok.experimental.Accessors;

import java.io.Serializable;
import java.util.Date;

@Data
@AllArgsConstructor
@NoArgsConstructor
@Accessors(chain = true)
public class User implements Serializable {
    
    
    private Long id;
    private String name;
    private Integer age;
    private String email;

    @Version    //乐观锁version注解
    private Integer version;

    @TableLogic  //逻辑删除
    private Integer deleted;

    //  字段添加填充
    @TableField(fill = FieldFill.INSERT)
    private Date CreateTime;

    @TableField(fill = FieldFill.INSERT_UPDATE)
    private Date UpdateTime;
}

3、新建一个maven项目，springcloud-provider-user-8001子模块，表示服务提供者

取名为springcloud-provider-user-8001这样比较直观

1. 编写pom.xml文件

<?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>springcloud</artifactId>
        <groupId>org.example</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>springcloud-provier-user-8001</artifactId>

    <dependencies>
        <!-- 我们需要拿到实体类 ，所以配置api module -->
        <dependency>
            <groupId>org.example</groupId>
            <artifactId>springcloud-api</artifactId>
            <version>1.0-SNAPSHOT</version>
        </dependency>

        <!-- junit -->
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <scope>test</scope>
        </dependency>

        <!-- 数据库驱动 -->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
        </dependency>


        <!-- mybatis_plus -->
        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus-boot-starter</artifactId>
        </dependency>

        <!--druid-->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
            <version>1.1.18</version>
        </dependency>

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

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

        <dependency>
            <groupId>ch.qos.logback</groupId>
            <artifactId>logback-core</artifactId>
        </dependency>

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

        <!-- 热部署工具 -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
        </dependency>
    </dependencies>

</project>

2、编写application.yml

server:
  port: 8001
spring:
  application:
    name: springcloud-provider-user
  datasource:
    driver-class-name: com.mysql.cj.jdbc.Driver
    type: com.alibaba.druid.pool.DruidDataSource
    url: jdbc:mysql://localhost:3306/mybatis_plus?serverTimezone=GMT%2B8
    username: root
    password: 520China


mybatis-plus:
  configuration:
    log-impl: org.apache.ibatis.logging.stdout.StdOutImpl
  global-config:
    db-config:
      logic-delete-value: 1
      logic-not-delete-value: 0

3. 编写Mapper

package com.hzxy.springcloud.mapper;

import com.baomidou.mybatisplus.core.mapper.BaseMapper;
import com.hzxy.springcloud.model.User;
import org.springframework.stereotype.Repository;

// 在对应的Mapper上面继承基本的类 BaseMapper
@Repository    //代表持久层
public interface UserMapper extends BaseMapper<User> {
    
    
    // 所有的CRUD操作已经编写完成
    // 你不需要像以前的配置一大堆文件了
}

4. 编写service和service的实现

UserService

package com.hzxy.springcloud.service;

import com.hzxy.springcloud.model.User;

import java.util.List;

public interface UserService {
    
    
    public List<User> findAll();
}

UserServiceImpl

package com.hzxy.springcloud.service.impl;

import com.hzxy.springcloud.mapper.UserMapper;
import com.hzxy.springcloud.model.User;
import com.hzxy.springcloud.service.UserService;
import org.springframework.stereotype.Service;

import javax.annotation.Resource;
import java.util.List;

@Service
public class UserServiceImpl implements UserService {
    
    
    @Resource
    private UserMapper userMapper;

    public List<User> findAll() {
    
    
        return userMapper.selectList(null);
    }
}

5. 编写controller

package com.hzxy.springcloud.controller;

import com.hzxy.springcloud.model.User;
import com.hzxy.springcloud.service.UserService;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import javax.annotation.Resource;
import java.util.List;

@RestController
public class UserController {
    
    

    @Resource
    private UserService userService;

    @RequestMapping("/hello")
    public List<User> hello(){
    
    
        return userService.findAll();
    }
}

6. 编写springboot的启动类

package com.hzxy.springcloud;

import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@MapperScan("com.hzxy.springcloud.mapper")
@SpringBootApplication
public class Provider_8001 {
    
    
    public static void main(String[] args) {
    
    
        SpringApplication.run(Provider_8001.class,args);
    }
}

编写完后，启动，测试
在这里插入图片描述
如图，表示成功！

4、新建一个maven项目，springcloud-consumer-user-80子模块，表示服务消费者

端口为80是因为一般网站都是80为端口的，这样可以省略，如www.baidu.com

1. 编写pom.xml文件

本来应该是不用加上数据库驱动的，但是没有加不能启动，而加上数据库驱动就没有问题了，所以文件加上了数据库驱动。

<?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>springcloud</artifactId>
        <groupId>org.example</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

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

    <dependencies>
        <!-- 我们需要拿到实体类 ，所以配置api module -->
        <dependency>
            <groupId>org.example</groupId>
            <artifactId>springcloud-api</artifactId>
            <version>1.0-SNAPSHOT</version>
        </dependency>

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

        <!-- 热部署工具 -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
        </dependency>

        <!-- 数据库驱动 -->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
        </dependency>

    </dependencies>
</project>

2. 编写application.yml

server:
  port: 80
spring:
  application:
    name: springcloud-consumer-user
  datasource:
    driver-class-name: com.mysql.cj.jdbc.Driver
    url: jdbc:mysql://localhost:3306/mybatis_plus?serverTimezone=GMT%2B8
    username: root
    password: 520China

3. 编写配置类

编写配置类，注册RestTemplate对象

package com.hzxy.springcloud.config;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.client.RestTemplate;

@Configuration
public class ConfigBean {
    
    

    // @Configuration -- spring applicationContext.xml

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

4. 编写controller，调用服务提供者的服务

package com.hzxy.springcloud.controller;

import com.hzxy.springcloud.model.User;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;

import javax.annotation.Resource;
import java.util.List;


@RestController
public class UserController {
    
    

    @Resource
    private RestTemplate restTemplate;

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

    @RequestMapping("/hi")
    public List<User> Hi(){
    
    
        return restTemplate.getForObject(REST_URL,List.class);
    }
}

5. 编写springboot启动类

package com.hzxy.springcloud;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class Consumer_80 {
    
    
    public static void main(String[] args) {
    
    
        SpringApplication.run(Consumer_80.class,args);
    }
}

6. 测试

启动服务提供者和服务消费者
在这里插入图片描述
在浏览器输入http://localhost/hi，回车
在这里插入图片描述
访问成功，拆分成功！

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