SpringCloud Hoxton + SpringCloud Alibaba Learning Notes (1) - Basics

Cloud component stop more information

1. Create project workspace with IDEA

1, the New Project

2. General project name of aggregation

3. Select Maven version

4. Project Name

5. Character encoding

6. Annotations are activated

7. Select Java compiled version 8

8. File Type filtering (hiding unnecessary files and folders)

9. Delete the SRC folder

Modify the parent project POM. XML file

<? 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 https://maven.apache.org/xsd/maven-4.0.0.xsd">

  <modelVersion>4.0. 0</modelVersion>

  <groupId>com.atguigu.springcloud</groupId>
  <artifactId>cloud2020</artifactId>
  <version>1.0-SNAPSHOT</version> <packaging>pom</packaging> <! - unified management jar package version - > < properties > < project. Build. SourceEncoding > utf-88</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>1.217.</log4j.version>
    <lombok.version>1.1618.</lombok.version>
    <mysql.version>5.147.</mysql.version>
    <druid.version>1.116.</druid.version>
    <mybatis.spring.boot.version>1.3. 0</mybatis.spring.boot.version> </properties> <! <dependencyManagement> <dependencies> <! --spring boot2.22.-->
      <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-dependencies</artifactId>
        <version>2.22..RELEASE</version>
        <type>pom</type>
        <scope>import</scope> </dependency> <! --spring cloud Hoxton.SR1--> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-dependencies</artifactId> <version>Hoxton.SR1</version> <type>pom</type> <scope>import</scope> </dependency> <! --spring cloud alibaba2.1. 0.RELEASE--> <dependency> <groupId>com.alibaba.cloud</groupId> <artifactId>spring-cloud-alibaba-dependencies</artifactId>  <version>2.1. 0.RELEASE</version>
        <type>pom</type>
        <scope>import</scope>
      </dependency>

      <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
        <version>${mysql.version}</version>
      </dependency>
      <dependency>
        <groupId>com.alibaba</groupId>
        <artifactId>druid</artifactId>
        <version>${druid.version}</version>
      </dependency>
      <dependency>
        <groupId>org.mybatis.spring.boot</groupId>
        <artifactId>mybatis-spring-boot-starter</artifactId>
        <version>${mybatis.spring.boot.version}</version>
      </dependency>
      <dependency>
        <groupId>junit</groupId>
        <artifactId>junit</artifactId>
        <version>${junit.version}</version>
      </dependency>
      <dependency>
        <groupId>log4j</groupId>
        <artifactId>log4j</artifactId>
        <version>${log4j.version}</version>
      </dependency>
      <dependency>
        <groupId>org.projectlombok</groupId>
        <artifactId>lombok</artifactId>
        <version>${lombok.version}</version>
        <optional>true</optional>
      </dependency>
    </dependencies>
  </dependencyManagement>

  <build>
    <plugins>
      <plugin>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-maven-plugin</artifactId>
        <configuration>
          <fork>true</fork>
          <addResources>true</addResources>
        </configuration>
      </plugin>
    </plugins>
  </build>

</project>
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Packaging is poM, which means it is the parent project

DependencyManagement and Dependencies in Maven

Unit testing is skipped in Maven

After clicking, the test line grays out, skipping unit tests to save time

After the parent project is created, execute MVN :install to publish the parent project to the repository for the inheritance of the child project

Second, Rest microservice engineering construction

The first version structure diagram

Cloud-provider-payment8001 microservice provider payment Module Module

1. Right-click the parent project and create a new Module

Archetype is not an option

2. After creation, please go back to the parent project to check the changes of the POM file

Removed after

3. Modify the pom. XML file in Payment8001


      
<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>cloud2020</artifactId>
        <groupId>com.atguigu.springcloud</groupId>
        <version>1.0 the SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>cloud-provider-payment8001</artifactId>

    <dependencies>
        <! -- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-web -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <! -- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-web -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>

        <! -- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-web -->
        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
        </dependency>

        <! -- https://mvnrepository.com/artifact/com.alibaba/druid -->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid-spring-boot-starter</artifactId>
            <version>1.1.10</version>
        </dependency>
        <! -- https://mvnrepository.com/artifact/mysql/mysql-connector-java -->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
        </dependency>

        <! -- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-jdbc -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-jdbc</artifactId>
        </dependency>

        <! -- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-devtools -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
           <scope>runtime</scope>
            <optional>true</optional>
        </dependency>

        <! -- https://mvnrepository.com/artifact/org.projectlombok/lombok -->
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>

        <! -- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-test -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>

    </dependencies>

</project>
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4. Write YML and create application.yaml under resource

server:
  port: 8001


spring:
  application:
    name: cloud-payment-service
  datasource:
    type: com.alibaba.druid.pool.DruidDataSource
    driver-class-name: org.gjt.mm.mysql.Driver
    url: jdbc:mysql://localhost:3306/db2020? useUnicode=true&characterEncoding=utf-8&useSSL=false
    username: root
    password: 123456

mybatis:
  mapperLocations: classpath:mapper/*.xml
  type-aliases-package: com.atguigu.springcloud.entities
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5, main startup, create a startup class

@SpringBootApplication
public class PaymentMain8001 {

    public static void main(String[] args) { SpringApplication.run(PaymentMain8001.class, args); }}Copy the code

Business class

Create a database and add data

Create an entity class

package com.atguigu.springcloud.entities;

import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;

import java.io.Serializable;

@Data
@AllArgsConstructor
@NoArgsConstructor
public class Payment implements Serializable {
    private Long id;
    private String serial;
}
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Note: The Lombok plugin must be installed here.

Create a Json wrapper body called CommonResult (front-end feedback to back-end)

package com.atguigu.springcloud.entities;

import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;

@Data
@AllArgsConstructor
@NoArgsConstructor
public class CommonResult <T>{

    private Integer code;
    private String message;
    private T data;

    public CommonResult(Integer code,String message){
        this(code,message,null); }}Copy the code

Create a DAO

package com.atguigu.springcloud.dao;

import com.atguigu.springcloud.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);
}
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Create the mybatis mapping file paymentMapper.xml


      
<! DOCTYPEmapper PUBLIC "- / / mybatis.org//DTD Mapper / 3.0 / EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">

<mapper namespace="com.atguigu.springcloud.dao.PaymentDao">

    <resultMap id="BaseResultMap" type="com.atguigu.springcloud.entities.Payment">
        <id column="id" property="id" jdbcType="BIGINT"></id>
        <id column="serial" property="serial" jdbcType="VARCHAR"></id>
    </resultMap>
    
    <insert id="create" parameterType="Payment" useGeneratedKeys="true" keyProperty="id">
        insert into payment(serial) values(#{serial});

    </insert>

    <select id="getPaymentById"  parameterType="Long" resultMap="BaseResultMap">
        select * from payment where id=#{id}
    </select>
    
</mapper>
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(4), the service

Interface PaymentService

package com.atguigu.springcloud.service;

import com.atguigu.springcloud.entities.Payment;
import org.apache.ibatis.annotations.Param;

public interface PaymentService {

    public int create(Payment payment); / / write

    public Payment getPaymentById(@Param("id") Long id);  / / read
}
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The implementation class PaymentServiceImpl

package com.atguigu.springcloud.service.impl;

import com.atguigu.springcloud.dao.PaymentDao;
import com.atguigu.springcloud.entities.Payment;
import com.atguigu.springcloud.service.PaymentService;
import org.springframework.stereotype.Service;

import javax.annotation.Resource;

@Service
public class PaymentServiceImpl implements PaymentService {

    @Resource
    private PaymentDao paymentDao;

    public int create(Payment payment){
        return paymentDao.create(payment);
    }

    public Payment getPaymentById( Long id){

        returnpaymentDao.getPaymentById(id); }}Copy the code

⑤ Create a new controller

package com.atguigu.springcloud.controller;

import com.atguigu.springcloud.entities.CommonResult;
import com.atguigu.springcloud.entities.Payment;
import com.atguigu.springcloud.service.PaymentService;
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.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 CommonResult create(Payment payment){
        int result = paymentService.create(payment);
        log.info("***** insert result:"+result);
        if (result>0) {/ / success
            return new CommonResult(200."Database inserted successfully",result);
        }else {
            return new CommonResult(444."Failed to insert database".null); }}@GetMapping(value = "/payment/get/{id}")
    public CommonResult getPaymentById(@PathVariable("id") Long id){
        Payment payment = paymentService.getPaymentById(id);
        log.info("***** Query result:+payment);
        if(payment! =null) {// The query succeeds if there is data
            return new CommonResult(200."Query successful",payment);
        }else {
            return new CommonResult(444."No record, query ID:"+id,null); }}}Copy the code

The directory structure

7. Start PaymentMain8001 to test

Insert data

Hot Deployment of Devtools

Add dependencies to the subproject pom.xml

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-devtools</artifactId>
    <scope>runtime</scope>
    <optional>true</optional>
</dependency>
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2. Add configuration to parent project POM.xml

<build>
  <plugins>
    <plugin>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-maven-plugin</artifactId>
      <configuration>
        <fork>true</fork>
        <addResources>true</addResources>
      </configuration>
    </plugin>
  </plugins>
</build>
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3. Enable automatic compilation and configuration

4, Update the value of

Press the shortcut key CTRL + Alt + Shift +/ to pop up the popup window and click Registry

Just hook the next two

5. Restart IDEA

After the restart, run the Springboot main class and modify the Java class casually. Wait for a moment and see if the console logs are printed. If any logs are printed, the modification is successful.

Cloud-consumer-order80 micro service consumer order Module

1. Build the project as cloud-provider-Payment8001

2. Modify the pom. XML file of cloud-consumer-order80


      
<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>cloud2020</artifactId>
        <groupId>com.atguigu.springcloud</groupId>
        <version>1.0 the SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>cloud-consumer-order80</artifactId>

    <dependencies>
        <! -- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-web -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <! -- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-web -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>

        <! -- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-devtools -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <scope>runtime</scope>
            <optional>true</optional>
        </dependency>

        <! -- https://mvnrepository.com/artifact/org.projectlombok/lombok -->
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>

        <! -- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-test -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>
</project>
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3. Write YML and create application.yaml under resource

server:
  port: 80
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4. Create the primary boot device

package com.atguigu.springcloud;

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); }}Copy the code

Create entities

(Copy the two entities from the Entities package under the Cloud-provider-Payment8001 project.)

6. Calls between different services –RestTemplate

7. Write the Config configuration class

package com.atguigu.springcloud.config;

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(a){
        return newRestTemplate(); }}Copy the code

Create controller

package com.atguigu.springcloud.controller;

import com.atguigu.springcloud.entities.CommonResult;
import com.atguigu.springcloud.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 OrderController {

    public static final String PAYMENT_URL = "http://localhost:8001";

    @Resource
    private RestTemplate restTemplate;

    @GetMapping("/consumer/payment/create")
    public CommonResult<Payment>   create(Payment payment){
        return restTemplate.postForObject(PAYMENT_URL+"/payment/create",payment,CommonResult.class);  / / write operations
    }

    @GetMapping("/consumer/payment/get/{id}")
    public CommonResult<Payment> getPayment(@PathVariable("id") Long id){
        return restTemplate.getForObject(PAYMENT_URL+"/payment/get/"+id,CommonResult.class); }}Copy the code

9, test,

Start the cloud-provider-Payment8001 test and then start the cloud-consumer-Order80 test:http://localhost/consumer/payment/get/2 http://localhost/consumer/payment/create?serial=12222

10. Supplementary notes

Directory structure

5. Engineering reconstruction

1. Create a new Module and place the common parts here

Name is cloud – API – Commons

2. Modify the pom. XML file in cloud-apI-Commons


      
<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>cloud2020</artifactId>
        <groupId>com.atguigu.springcloud</groupId>
        <version>1.0 the SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>cloud-api-commons</artifactId>

    <dependencies>
        <! -- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-devtools -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <scope>runtime</scope>
            <optional>true</optional>
        </dependency>

        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>

        <! -- https://mvnrepository.com/artifact/cn.hutool/hutool-all -->
        <dependency>
            <groupId>cn.hutool</groupId>
            <artifactId>hutool-all</artifactId>
            <version>5.1.0</version>
        </dependency>
    </dependencies>

</project>
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Create entities

(Copy the two entities from the Entities package under the Cloud-provider-Payment8001 project.)

4, maven command clean install

5. Delete the Entity file

The entities folder in the cloud-provider-Payment8001 and Cloud-Consumer-Order80 projects should be deleted

6. Introduce the API generic package in pom.xml for both projects

<! -- introduce your own API generic package -->
<dependency>
     <groupId>com.atguigu.springcloud</groupId>
     <artifactId>cloud-api-commons</artifactId>
     <version>${project.version}</version>
 </dependency>
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SpringCloud Hoxton + SpringCloud Alibaba Learning Notes (1) – Basics

1. Create project workspace with IDEA

1, the New Project

2. General project name of aggregation

3. Select Maven version

4. Project Name

5. Character encoding

6. Annotations are activated

7. Select Java compiled version 8

8. File Type filtering (hiding unnecessary files and folders)

9. Delete the SRC folder

Modify the parent project POM. XML file

DependencyManagement and Dependencies in Maven

Unit testing is skipped in Maven

After the parent project is created, execute MVN :install to publish the parent project to the repository for the inheritance of the child project

Second, Rest microservice engineering construction

Cloud-provider-payment8001 microservice provider payment Module Module

1. Right-click the parent project and create a new Module

2. After creation, please go back to the parent project to check the changes of the POM file

3. Modify the pom. XML file in Payment8001

4. Write YML and create application.yaml under resource

5, main startup, create a startup class

Business class

Create a database and add data

Create an entity class

Note: The Lombok plugin must be installed here.

Create a Json wrapper body called CommonResult (front-end feedback to back-end)

Create a DAO

Create the mybatis mapping file paymentMapper.xml

(4), the service

⑤ Create a new controller

7. Start PaymentMain8001 to test

Hot Deployment of Devtools

Add dependencies to the subproject pom.xml

2. Add configuration to parent project POM.xml

3. Enable automatic compilation and configuration

4, Update the value of

5. Restart IDEA

Cloud-consumer-order80 micro service consumer order Module

1. Build the project as cloud-provider-Payment8001

2. Modify the pom. XML file of cloud-consumer-order80

3. Write YML and create application.yaml under resource

4. Create the primary boot device

Create entities

6. Calls between different services –RestTemplate

7. Write the Config configuration class

Create controller

9, test,

10. Supplementary notes

5. Engineering reconstruction

1. Create a new Module and place the common parts here

2. Modify the pom. XML file in cloud-apI-Commons

Create entities

4, maven command clean install

5. Delete the Entity file

6. Introduce the API generic package in pom.xml for both projects

7. Start two projects to test whether the query and insert are successful

Zhou Yang teacher code

SpringCloud Mind Map download

Next up:(2) service registration and discovery

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