一、使用maven从零开始搭建SpringCloud项目

SpringCloud学习笔记

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2020/7/11

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微服务架构

技术路线

（红色代表已淘汰技术）

搭建项目环境

(思路：先创建父工程，修改pom文件，再添加一个个的moudle)

• 使用Maven创建一个父工程（site模板）

  

• 设置编码

  

• 注解生效激活

  

• 设置java编译版本

  

• 删除src文件

• 修改pom文件

  • 设置标签

    <packaging>pompackaging>
    

  • 统一管理jar包版本

    <properties>
        <project.build.sourceEncoding>UTF-8project.build.sourceEncoding>
        <maven.compiler.source>1.8maven.compiler.source>
        <maven.compiler.target>1.8maven.compiler.target>
        <junit.version>4.12junit.version>
        <lombok.version>1.16.18lombok.version>
        <log4j.version>1.2.17log4j.version>
        <mysql.version>8.0.18mysql.version>
        <druid.version>1.1.16druid.version>
        <mybatis.spring.boot.version>2.1.1mybatis.spring.boot.version>
    properties>
    
    

    maven.compiler.source：设置编译的jdk版本

  • 子模块继承之后，提供作用：锁定版本+子module不用写groupId和version

     <dependencyManagement>
        <dependencies>
          <dependency>
            <groupId>org.apache.maven.pluginsgroupId>
            <artifactId>maven-project-info-reports-pluginartifactId>
            <version>3.0.0version>
          dependency>
          
          <dependency>
            <groupId>org.springframework.bootgroupId>
            <artifactId>spring-boot-dependenciesartifactId>
            <version>2.2.2.RELEASEversion>
            <type>pomtype>
            <scope>importscope>
          dependency>
          
          <dependency>
            <groupId>org.springframework.cloudgroupId>
            <artifactId>spring-cloud-dependenciesartifactId>
            <version>Hoxton.SR1version>
            <type>pomtype>
            <scope>importscope>
          dependency>
          <dependency>
            <groupId>org.mybatis.spring.bootgroupId>
            <artifactId>mybatis-spring-boot-starterartifactId>
            <version>${mybatis.spring.boot.version}version>
          dependency>
          
          <dependency>
            <groupId>junitgroupId>
            <artifactId>junitartifactId>
            <version>${junit.version}version>
          dependency>
          
          <dependency>
            <groupId>log4jgroupId>
            <artifactId>log4jartifactId>
            <version>${log4j.version}version>
          dependency>
          <dependency>
            <groupId>com.alibaba.cloudgroupId>
            <artifactId>spring-cloud-alibaba-dependenciesartifactId>
            <version>2.1.0.RELEASEversion>
            <type>pomtype>
            <scope>importscope>
          dependency>
          
          <dependency>
            <groupId>mysqlgroupId>
            <artifactId>mysql-connector-javaartifactId>
            <version>${mysql.version}version>
            <scope>runtimescope>
          dependency>
          
          <dependency>
            <groupId>com.alibabagroupId>
            <artifactId>druidartifactId>
            <version>${druid.version}version>
          dependency>
        dependencies>
      dependencyManagement>
    

创建SpringBoot服务提供者子模块

思路：建Module、改Pom、写Yml、主启动、业务类

创建Moudle

修改Pom文件

继承了父工程之后，子模块只需写GAV中的A

• 添加依赖

   <dependencies>
          <dependency>
              <groupId>org.springframework.bootgroupId>
              <artifactId>spring-boot-starter-webartifactId>
          dependency>
          <dependency>
              <groupId>org.springframework.bootgroupId>
              <artifactId>spring-boot-starter-actuatorartifactId>
          dependency>
          <dependency>
              <groupId>org.mybatis.spring.bootgroupId>
              <artifactId>mybatis-spring-boot-starterartifactId>
          dependency>
          <dependency>
              <groupId>com.alibabagroupId>
              <artifactId>druid-spring-boot-starterartifactId>
              <version>1.1.10version>
          dependency>
          <dependency>
              <groupId>mysqlgroupId>
              <artifactId>mysql-connector-javaartifactId>
          dependency>
          <dependency>
              <groupId>org.springframework.bootgroupId>
              <artifactId>spring-boot-starter-jdbcartifactId>
          dependency>
          <dependency>
              <groupId>org.springframework.bootgroupId>
              <artifactId>spring-boot-devtoolsartifactId>
          dependency>
          <dependency>
              <groupId>org.projectlombokgroupId>
              <artifactId>lombokartifactId>
          dependency>
          <dependency>
              <groupId>org.springframework.bootgroupId>
              <artifactId>spring-boot-starter-testartifactId>
              <scope>testscope>
          dependency>
      dependencies>
  

编写application.yml文件

内容如下

server:
  port: 8001

spring:
  application:
    name: cloud-payment-service
  datasource:
    type: com.alibaba.druid.pool.DruidDataSource
    driver-class-name: com.mysql.cj.jdbc.Driver
    username: root
    password: 23456789
    url: jdbc:mysql://localhost:3306/springcloud?serverTimezone=UTC&useUnicode=true&characterEncoding=utf-8


mybatis:
  mapper-locations: classpath:mapper/*.xml
  type-aliases-package: com.sise.entities

注：

• mapper-location：扫描resources/mapper中的xml文件
• type-aliases-package：所有entities别名类所在的包

创建启动类

代码如下：

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

@SpringBootApplication
public class paymentMain8001 {
    public static void main(String[] args) {
        SpringApplication.run(paymentMain8001.class,args);
    }

}

编写业务类

• entities包

  CommenResult类：

  import lombok.AllArgsConstructor;
  import lombok.Data;
  import lombok.NoArgsConstructor;
  
  @Data
  @AllArgsConstructor
  @NoArgsConstructor
  public class CommentResult<T> {
      private Integer code;
      private String message;
      private T data;
  
      public CommentResult(Integer code,String message){
          this(code,message,null);
      }
  }
  

  Payment类：

  import lombok.AllArgsConstructor;
  import lombok.Data;
  import lombok.NoArgsConstructor;
  
  import java.io.Serializable;
  
  @Data
  @NoArgsConstructor
  @AllArgsConstructor
  public class Payment implements Serializable {
      private Long id;
      private String serial;
  }
  

• dao包

  PaymentDao接口：

  @Mapper
  public interface PaymentDao {
      public int create(Payment payment);
      public Payment getPaymentById(@Param("id") long id);
  }
  
  

  PaymentDao类：

  import com.sise.entities.Payment;
  import org.apache.ibatis.annotations.Mapper;
  import org.apache.ibatis.annotations.Param;
  
  @Mapper
  public interface PaymentDao {
      public int create(Payment payment);
      public Payment getPaymentById(@Param("id") long id);
  }
  

• resources/mapper/PaymentMapper.xml:

  
  
  <mapper namespace="com.sise.dao.PaymentDao">
      <insert id="create" parameterType="Payment" useGeneratedKeys="true" keyProperty="id">
          insert into payment(serial) values (#{serial})
      insert>
  
  
      <resultMap id="BaseResultMap" type="Payment">
          <id column="id" property="id" jdbcType="BIGINT"/>
          <id column="serial" property="serial" javaType="VARCHAR"/>
      resultMap>
      <select id="getPaymentById" parameterType="Long" resultMap="BaseResultMap">
          select * from payment where id=#{id}
      select>
  mapper>
  
  

• service包

  PaymentService接口：

  import com.sise.entities.Payment;
  import org.apache.ibatis.annotations.Param;
  
  public interface PaymentService {
      public int create(Payment payment);
      public Payment getPaymentById(@Param("id") Long id);
  }
  
  

  PaymentServiceImp类：

  import com.sise.dao.PaymentDao;
  import com.sise.entities.Payment;
  import org.springframework.stereotype.Service;
  
  import javax.annotation.Resource;
  
  @Service
  public class PaymentServiceImp implements PaymentService{
      
      @Resource
      private PaymentDao paymentDao;
      
      @Override
      public int create(Payment payment) {
          return paymentDao.create(payment);
      }
  
      @Override
      public Payment getPaymentById(Long id) {
          return paymentDao.getPaymentById(id);
      }
  }
  
  

• controller包

  PaymentController类：

  import com.sise.entities.CommentResult;
  import com.sise.entities.Payment;
  import com.sise.service.PaymentService;
  import lombok.extern.slf4j.Slf4j;
  import org.springframework.web.bind.annotation.PathVariable;
  import org.springframework.web.bind.annotation.PostMapping;
  import org.springframework.web.bind.annotation.RestController;
  
  import javax.annotation.Resource;
  
  @RestController
  @Slf4j
  public class PaymentController {
  
      @Resource
      private PaymentService paymentService;
  
      @PostMapping(value = "/payment/create")
      public CommentResult create(Payment payment) {
          int result = paymentService.create(payment);
          log.info("*****插入结果："+result);
  
          if (result>0){
              return new CommentResult(200,"插入数据成功",result);
          }else {
              return new CommentResult(444,"插入数据失败");
          }
      }
  
      @GetMapping(value = "/payment/get/{id}")
      public CommentResult getPaymentById(@PathVariable("id") Long id){
          Payment payment=paymentService.getPaymentById(id);
          log.info("*****查找结果："+payment);
  
          if(payment!=null){
              return new CommentResult(200,"查询成功",payment);
          }else {
              return new CommentResult(444,"没有记录");
          }
      }
  }
  

测试

• get请求

  

• post请求

  

创建SpringBoot服务消费者子模块

创建Moudle

修改Pom文件

<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>my-springcloudartifactId>
        <groupId>com.sisegroupId>
        <version>1.0-SNAPSHOTversion>
    parent>
    <modelVersion>4.0.0modelVersion>

    <artifactId>cloud-consumer-order80artifactId>

    <dependencies>
        <dependency>
            <groupId>org.springframework.bootgroupId>
            <artifactId>spring-boot-starter-webartifactId>
        dependency>
        <dependency>
            <groupId>org.springframework.bootgroupId>
            <artifactId>spring-boot-starter-actuatorartifactId>
        dependency>
        <dependency>
            <groupId>org.springframework.bootgroupId>
            <artifactId>spring-boot-devtoolsartifactId>
        dependency>
        <dependency>
            <groupId>org.projectlombokgroupId>
            <artifactId>lombokartifactId>
        dependency>
        <dependency>
            <groupId>org.springframework.bootgroupId>
            <artifactId>spring-boot-starter-testartifactId>
            <scope>testscope>
        dependency>
    dependencies>
project>

编写application.yml文件

设置端口为80

创建启动类

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

@SpringBootApplication
public class OrderMain80 {
    public static void main(String[] args) {
        SpringApplication.run(OrderMain80.class,args);
    }
}

编写业务类

• entities包

  Payment类：

  import lombok.AllArgsConstructor;
  import lombok.Data;
  import lombok.NoArgsConstructor;
  
  import java.io.Serializable;
  
  @Data
  @NoArgsConstructor
  @AllArgsConstructor
  public class Payment implements Serializable {
      private Long id;
      private String serial;
  }
  

  CommentResult类：

  import lombok.AllArgsConstructor;
  import lombok.Data;
  import lombok.NoArgsConstructor;
  
  @Data
  @AllArgsConstructor
  @NoArgsConstructor
  public class CommentResult<T> {
      private Integer code;
      private String message;
      private T data;
  
      public CommentResult(Integer code,String message){
          this(code,message,null);
      }
  }
  
  

• config包

  config配置类：

  将RestTemplate注入到springboot容器中

  import org.springframework.context.annotation.Bean;
  import org.springframework.context.annotation.Configuration;
  import org.springframework.web.client.RestTemplate;
  
  @Configuration
  public class ApplicationContextConfig {
  
      @Bean
      public RestTemplate getRestTemplate(){
          return new RestTemplate();
      }
      
      //注解@bean：相当于在applicationContext.xml中的
  }
  

• controller包

  import com.sise.entities.CommentResult;
  import com.sise.entities.Payment;
  import lombok.extern.slf4j.Slf4j;
  import org.springframework.web.bind.annotation.GetMapping;
  import org.springframework.web.bind.annotation.PathVariable;
  import org.springframework.web.bind.annotation.RestController;
  import org.springframework.web.client.RestTemplate;
  
  import javax.annotation.Resource;
  
  @RestController
  @Slf4j
  public class OderController {
  
      public static final String PAYMENT_URL="http://localhost:8001";
  
      @Resource
      RestTemplate restTemplate;
  
      @GetMapping("/consumer/payment/create")
      public CommentResult<Payment> create(Payment payment){
          return restTemplate.postForObject(PAYMENT_URL+"/payment/create",payment,CommentResult.class);
      }
  
      @GetMapping("/consumer/payment/get/{id}")
      public CommentResult<Payment> getPayment(@PathVariable("id") Long id){
          return restTemplate.getForObject(PAYMENT_URL+"/payment/get/"+id,CommentResult.class);
      }
  }
  
  

  注：需要在PaymentController中添加@RequestBody

  

测试

nal String PAYMENT_URL=“http://localhost:8001”;

  @Resource
  RestTemplate restTemplate;

  @GetMapping("/consumer/payment/create")
  public CommentResult create(Payment payment){
      return restTemplate.postForObject(PAYMENT_URL+"/payment/create",payment,CommentResult.class);
  }

  @GetMapping("/consumer/payment/get/{id}")
  public CommentResult getPayment(@PathVariable("id") Long id){
      return restTemplate.getForObject(PAYMENT_URL+"/payment/get/"+id,CommentResult.class);
  }

}

注：需要在PaymentController中添加@RequestBody

[外链图片转存中...(img-80NGFltt-1604759997286)]





#### 测试

![image-20200712222547017](https://img-blog.csdnimg.cn/img_convert/04ff2f8e87121c9a2c6f0058c1bb1211.png)