SpringCloud（生产者模块构建）

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支付模块构建

4.1 创建微服务模块套路

  1. 建Module
  2. 改POM
  3. 写YML
  4. 主启动
  5. 业务类

image-20220320164846146

创建cloud-provider-payment8001微服务提供者支付Module模块：

==建立后的目录结构如下：==

image-20220320170708923

1.建名为cloud-provider-payment8001的Maven工程

2.改POM

<?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>cloud</artifactId>
        <groupId>com.caq.cloud</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>cloud-provider-payment8001</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.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
        </dependency>
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid-spring-boot-starter</artifactId>
            <version>1.1.10</version>
        </dependency>
        <!--mysql-connector-java-->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
        </dependency>
        <!--jdbc-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-jdbc</artifactId>
        </dependency>
        <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>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>

</project>

3.写YML

server:
  port: 8001

spring:
  application:
    name: cloud-payment-service
  datasource:
    type: com.alibaba.druid.pool.DruidDataSource            # 当前数据源操作类型
    driver-class-name: org.gjt.mm.mysql.Driver              # mysql驱动包
    url: jdbc:mysql://localhost:3306/db2022?useUnicode=true&characterEncoding=utf-8&useSSL=false
    username: root
    password: root

mybatis:
  mapperLocations: classpath:mapper/*.xml
  type-aliases-package: com.caq.cloud.entities    # 所有Entity别名类所在包

4.主启动

package com.caq.cloud;

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

@SpringBootApplication
public class PaymentMain001 {
    public static void main(String[] args) {
        SpringApplication.run(PaymentMain001.class, args);
    }
}

4.2 业务类小套路

5.业务类

  1. 业务类也有对应的套路：
  2. 建表SQL
  3. entities（主实体类，JSON封装体）
  4. dao（接口，mybatis映射文件）
  5. service（service和impl）
  6. controller

SQL：

CREATE TABLE `payment`(
	`id` bigint(20) NOT NULL AUTO_INCREMENT COMMENT 'ID',
    `serial` varchar(200) DEFAULT '',
	PRIMARY KEY (id)
)ENGINE=InnoDB AUTO_INCREMENT=1 DEFAULT CHARSET=utf8mb4

Entities：

实体类Payment：

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;
}

JSON封装体CommonResult：

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);
    }
}

DAO：

接口PaymentDao：

package com.caq.cloud.dao;

import com.caq.cloud.entities.Payment;
import org.apache.ibatis.annotations.Mapper;
import org.apache.ibatis.annotations.Param;

/**
 */
@Mapper
//@Repository不用Spring的
public interface PaymentDao
{
    public int create(Payment payment);

    public Payment getPaymentById(@Param("id") Long id);
}

MyBatis映射文件PaymentMapper.xml，路径：resources/mapper/PaymentMapper.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd" >

<mapper namespace="com.caq.cloud.dao.PaymentDao">

    <insert id="create" parameterType="Payment" useGeneratedKeys="true" keyProperty="id">
        insert into payment(serial)  values(#{serial});
    </insert>

    <resultMap id="BaseResultMap" type="com.caq.cloud.entities.Payment">
        <id column="id" property="id" jdbcType="BIGINT"/>
        <id column="serial" property="serial" jdbcType="VARCHAR"/>
    </resultMap>

    <select id="getPaymentById" parameterType="Long" resultMap="BaseResultMap">
        select * from payment where id=#{id};
    </select>

</mapper>

Service：

接口PaymentService

package com.caq.cloud.service;

import com.caq.cloud.entities.Payment;
import org.apache.ibatis.annotations.Param;

/**
 */
public interface PaymentService
{
    public int create(Payment payment);

    public Payment getPaymentById(@Param("id") Long id);
}

实现类

package com.caq.cloud.service.impl;

import com.caq.cloud.dao.PaymentDao;
import com.caq.cloud.entities.Payment;
import com.caq.cloud.service.PaymentService;
import org.apache.ibatis.annotations.Param;
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)
    {
        return paymentDao.getPaymentById(id);
    }
}

Controller：

package com.caq.cloud.controller;

import com.caq.cloud.entities.CommonResult;
import com.caq.cloud.entities.Payment;
import com.caq.cloud.service.PaymentService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.web.bind.annotation.*;

import javax.annotation.Resource;

/**
 *
 */
@RestController
@Slf4j
public class PaymentController {
    @Resource
    private PaymentService paymentService;

    @PostMapping(value = "/payment/create")
    public CommonResult<Payment> create(Payment payment) {
        int result = paymentService.create(payment);
        log.info("*****插入结果：" + result);

        if (result > 0) {
            return new CommonResult(200, "插入数据库成功",result);
        } else {
            return new CommonResult(444, "插入数据库失败", null);
        }
    }

    @GetMapping(value = "/payment/get/{id}")
    public CommonResult<Payment> getPaymentById(@PathVariable("id") Long id) {
        Payment payment = paymentService.getPaymentById(id);

        if (payment != null) {
            return new CommonResult<Payment>(200, "查询成功433", payment);
        } else {
            return new CommonResult<Payment>(444, "没有对应记录",null);
        }
    }
}

4.3 支付模块测试

我们用postman来模拟请求

image-20220320135659990

image-20220320135747029

4.3 热部署Devtools

开发时使用，生产环境关闭

1.Adding devtools to your project

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-devtools</artifactId>
    <scope>runtime</scope>
    <optional>true</optional>
</dependency>

2.Adding plugin to your pom.xml

下段配置复制到聚合父类总工程的pom.xml

<build>
    <!--
	<finalName>你的工程名</finalName>（单一工程时添加）
    -->
    <plugins>
        <plugin>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-maven-plugin</artifactId>
            <configuration>
                <fork>true</fork>
                <addResources>true</addResources>
            </configuration>
        </plugin>
    </plugins>
</build>

3.Enabling automatic build

File -> Settings(New Project Settings->Settings for New Projects) ->Complier

下面项勾选

Automatically show first error in editor Display notification on build completion Build project automatically Compile independent modules in parallel

image-20220320142659929

4.Update the value of

键入Ctrl + Shift + Alt + / ，打开Registry，勾选：

compiler.automake.allow.when.app.running

actionSystem.assertFocusAccessFromEdt

5.重启IDEA

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