（二）SpringCloud入门篇——Rest微服务工程：支付模块构建

目录

• 1.建module
• 2.改pom
• 3.写yml
• 4.主启动
• 5.业务类
  • 建表SQL
  • entity
    • 主实体Payment
    • Json封装体CommonResult
  • dao
    • 接口PaymentDao
    • mybatis的映射文件PaymentMapper.xml
  • service
    • 接口PaymentService
    • 实现类
  • controller
• 测试
• 代码结构

cloud-provider-payment8001 微服务提供者Module模块

总结：
1.建module
2.改pom
3.写yml
4.主启动
5.业务类

1.建module

这里没有选骨架，可以根据自己情况选择

创建完成后回到父工程查看pom文件变化
gav pom放在最上面

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>cloud2020</artifactId>
        <groupId>com.sunyan.springcloud</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>
        <version>2.2.6.RELEASE</version>
    </dependency>
    <!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-actuator -->
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-actuator</artifactId>
        <version>2.2.6.RELEASE</version>
    </dependency>
    <dependency>
        <groupId>org.mybatis.spring.boot</groupId>
        <artifactId>mybatis-spring-boot-starter</artifactId>
        <version>1.3.0</version>
    </dependency>
    <!-- https://mvnrepository.com/artifact/com.alibaba/druid-spring-boot-starter -->
    <dependency>
        <groupId>com.alibaba</groupId>
        <artifactId>druid-spring-boot-starter</artifactId>
        <version>1.1.21</version>
    </dependency>
    <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
        <version>3.1.14</version>
    </dependency>
    <!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-jdbc -->
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-jdbc</artifactId>
        <version>2.2.5.RELEASE</version>
    </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>
        <version>2.2.6.RELEASE</version>
    </dependency>
</dependencies>
</project>

3.写yml

一定要有服务端口号和服务名称

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: root


mybatis:
  mapperLocations: classpath:mapper/*.xml
  type-aliases-package: com.sunyan.springcloud.entity

4.主启动

5.业务类

建表SQL

CREATE TABLE `payment`(
    `id` BIGINT(20) NOT NULL AUTO_INCREMENT COMMENT 'ID',
    `serial` VARCHAR(20) DEFAULT '',
    PRIMARY KEY(id)
)ENGINE=INNODB AUTO_INCREMENT=1 DEFAULT CHARSET=utf8

entity

主实体Payment

Json封装体CommonResult

dao

接口PaymentDao

注意：建议加Mapper注解

mybatis的映射文件PaymentMapper.xml

路径：src/main/resources/mapper/PaymentMapper.xml
文件头

<?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">

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.sunyan.springcloud.dao.PaymentDao">


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

service

接口PaymentService

实现类

controller

测试

浏览器一般不支持post，用postman

1.postman工具模拟
2.自测通过

代码结构