微服務多模塊（服務提供者與服務消費者）開發圖解

技術/楊33

這篇文章用編碼來實現下面這張圖的工程結構：

一、創建一個存放公共代碼的子工程：cloud-common-util

1、pom.xml文件內容：

<code> 
<
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
>
cloudproject
artifactId
>

        
<
groupId
>
com.project.cloud
groupId
> 

        
<
version
>
1.0-SNAPSHOT
version
>

    
parent
>

    
<
modelVersion
>
4.0.0
modelVersion
>


    
<
artifactId
>
cloud-common-util
artifactId
>


    
<
dependencies
>

        
<
dependency
>

            
<
groupId
>
org.projectlombok
groupId
> 

            
<
artifactId
>
lombok
artifactId
>

        
dependency
>

         
        
<
dependency
>

            
<
groupId
>
org.springframework.boot
groupId
>

            
<
artifactId
>
spring-boot-devtools
artifactId
>

            
<
scope
>
runtime
scope
>

            
<
optional
> 
true
optional
>

        
dependency
>

         
        
<
dependency
>

            
<
groupId
>
cn.hutool
groupId
>

            
<
artifactId
>
hutool-all
artifactId
>

            
<
version
>
5.2.3
version
>

        
dependency
>

    
dependencies
>

 
project
>
/<code>

2、把多個子工程公用的代碼提出來，放到公共項目中

3、先maven clean，再maven install，將公共項目添加到maven倉庫中。

二、創建服務消費者訂單模塊：cloud-consumer-order80

1、pom.xml文件內容：

<code> 
<
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
>
cloudproject
artifactId
>

        
<
groupId
>
com.project.cloud
groupId
>

        
<
version
>
1.0-SNAPSHOT
version
>

    
parent
>

     
<
modelVersion
>
4.0.0
modelVersion
>


    
<
artifactId
>
cloud-consumer-order80
artifactId
>


    
<
dependencies
>

        
<
dependency
>

            
<
groupId
>
org.springframework.boot
groupId
>

            
<
artifactId
>
spring-boot-starter-web
artifactId
>

        
dependency
>

         
<
dependency
>

            
<
groupId
>
org.springframework.boot
groupId
>

            
<
artifactId
>
spring-boot-starter-actuator
artifactId
>

        
dependency
>

        
<
dependency
>

            
<
groupId
>
org.projectlombok
groupId
>

            
<
artifactId
>
lombok
artifactId
>

         
dependency
>

         
        
<
dependency
>

            
<
artifactId
>
cloud-common-util
artifactId
>

            
<
groupId
>
com.project.cloud
groupId
>

            
<
version
>
1.0-SNAPSHOT
version
>

        
dependency
>

    
dependencies
>

project
>
/<code>

2、修改application.yml配置文件

<code>
server:
  
port:
 
80
/<code>

3、編寫主啟動類

<code>
package
 com.cloud;

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

 
 
public
 
class
 
OrderMain80
 
{
    
public
 
static
 
void
 
main
(String[] args)
 
{
        SpringApplication.run(OrderMain80
.
class
, 
args
)
;
    }
}/<code>

4、創建一個配置類

<code>
package
 
com
.cloud
.config
;

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

 
@Configuration 

public class ContextConfig {

    
@Bean
    public RestTemplate getRestTemplate() {
        
return
 
new
 
RestTemplate
();
    }
}/<code>

5、編寫controller類

<code>
package
 com.cloud.controller;

import
 com.cloud.entities.CommonResult;
import
 com.cloud.entities.Payment;
import
 org.springframework.web.bind.
annotation
.GetMapping;
import
 org.springframework.web.bind.
annotation
.PathVariable;
import
 org.springframework.web.bind.
annotation
.PostMapping;
import
 org.springframework.web.bind.
annotation
.RestController;
import
 org.springframework.web.client.RestTemplate;

import
 javax.
annotation
.Resource;

 
 
public
 
class
 
OrderController
  
{
 
     
    
private
 static 
final
 String URL = 
"http://localhost:8001"
;

     
    
private
 RestTemplate restTemplate;

     
     
    
public
 CommonResult create(Payment payment) {
        
return
 restTemplate.postForObject(URL + 
"/payment/create"
, payment, CommonResult
.
class
);

    }

     
     
    
public
 CommonResult create(  
Long
 id) {
        
return
 restTemplate.getForObject(URL + 
"/payment/getPayment/"
 + id, CommonResult
.
class
);

    }
}/<code>

三、分別啟動服務提供者支付模塊、服務消費者訂單模塊，通過接口交互數據

後臺代碼使用RestTemplateAPI中的postForObject()和getForObject()方法實現接口遠程調用。

如圖：服務消費者訂單模塊請求服務提供者支付模塊，成功。

作者：楊33，北京互聯網公司在職Java開發，專注分享寫作乾貨。歡迎關注我，期待你的點贊評論。