您现在的位置是：首页 > IT要闻

当前栏目

SpringCloud学习（一）：支付模块的构建

模块学习

2023-03-14 22:46:46 时间

今天开始学习springcloud，先搭建一个简单的支付模块，后续再慢慢增加功能。编写微服务代码都要遵循以下步骤：

一、创建module

创建一个简单的maven工程和模块，maven选择的版本是3.5.2.

二、更改pom文件

父工程pom.xml：

<?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">
  <modelVersion>4.0.0</modelVersion>
 
  <groupId>com.shang.cloud</groupId>
  <artifactId>cloud</artifactId>
  <version>1.0-SNAPSHOT</version>
  <modules>
    <module>cloud-provider-payment8001</module>
  </modules>
  <packaging>pom</packaging>
 
  <!-- 统一管理jar包版本 -->
  <properties>
    <project.build.sourceEncoding>UTF-8</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>1.2.17</log4j.version>
    <lombok.version>1.16.18</lombok.version>
    <mysql.version>5.1.47</mysql.version>
    <druid.version>1.1.16</druid.version>
    <mybatis.spring.boot.version>1.3.0</mybatis.spring.boot.version>
  </properties>
 
  <!-- 子模块继承之后，提供作用：锁定版本+子modlue不用写groupId和version  -->
  <dependencyManagement>
    <dependencies>
      <!--spring boot 2.2.2-->
      <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-dependencies</artifactId>
        <version>2.2.2.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 alibaba 2.1.0.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.springframework.boot</groupId>
        <artifactId>spring-boot-devtools</artifactId>
        <scope>runtime</scope>
        <optional>true</optional>
      </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>

支付模块pom文件：

<?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.shang.cloud</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>
 
    <artifactId>cloud-provider-payment8001</artifactId>
 
    <dependencies>
        <!--包含了sleuth+zipkin-->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-zipkin</artifactId>
        </dependency>
<!--        &lt;!&ndash;eureka-client&ndash;&gt;-->
<!--        <dependency>-->
<!--            <groupId>org.springframework.cloud</groupId>-->
<!--            <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>-->
<!--        </dependency>-->
        <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>-->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
            <version>1.0.20</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>

三、编写yml文件

application.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/springcloud?useUnicode=true&characterEncoding=utf-8&useSSL=false
    username: root
    password: root
 
mybatis:
  mapperLocations: classpath:mapper/*.xml
  type-aliases-package: com.atguigu.springcloud.entities    # 所有Entity别名类所在包

四、编写主启动类

package com.shang.cloud;
 
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);
    }
}

五、编写业务类

按照 sql -> entity -> mapper -> service -> serviceImpl -> controller 的顺序编写

1、sql语句

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=utf8

2、entity

（1）实体类

package com.shang.cloud.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;
}

2）封装的json类型（用于传给前端）

package com.shang.cloud.entities;
 
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
 
/**
 * 传给前端的json串类型
 * @param <T>
 */
@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);
    }
}

3、mapper

package com.shang.cloud.dao;
 
import com.shang.cloud.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);
}

4、mapper.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.shang.cloud.dao.PaymentDao">
 
    <insert id="create" parameterType="com.shang.cloud.entities.Payment" useGeneratedKeys="true" keyProperty="id">
        insert into payment(serial) values(#{serial})
    </insert>
 
    <resultMap id="BaseResultMap" type="com.shang.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>

5、service

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

6、serviceImpl

package com.shang.cloud.service.impl;
 
import com.shang.cloud.dao.PaymentDao;
import com.shang.cloud.entities.Payment;
import com.shang.cloud.service.PaymentService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
 
@Service
public class PaymentServiceImpl implements PaymentService {
 
    @Autowired
    private PaymentDao paymentDao;
 
    @Override
    public int create(Payment payment) {
        return paymentDao.create(payment);
    }
 
    @Override
    public Payment getPaymentById(Long id) {
        return paymentDao.getPaymentById(id);
    }
}

7、controller

package com.shang.cloud.controller;
 
import com.shang.cloud.entities.CommonResult;
import com.shang.cloud.entities.Payment;
import com.shang.cloud.service.PaymentService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
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;
 
@RestController
@Slf4j
public class PaymentController {
 
    @Autowired
    private PaymentService paymentService;
 
    @PostMapping(value = "/payment/create")
    public CommonResult create(@RequestBody Payment payment){
        int result = paymentService.create(payment);
        log.info("========插入结果：" + result);
 
        if (result > 0){
            return new CommonResult(200, "插入结果集成功", result);
        } else {
            return new CommonResult(444, "插入结果集失败", null);
        }
    }
 
    @GetMapping(value = "/payment/get/{id}")
    public CommonResult getPaymentById(@PathVariable("id") Long id){
        Payment payment = paymentService.getPaymentById(id);
        log.info("========插入结果：" + payment);
 
        if (payment != null){
            return new CommonResult(200, "查询成功", payment);
        } else {
            return new CommonResult(444, "没有对应记录，查询id："+id, null);
        }
    }
}

六、运行测试

1、测试get请求

直接使用浏览器地址栏

拿到json串

2、测试post请求

使用postman工具来测试

数据库中也成功显示插入的数据

猜你喜欢

不会这些，你成不了Hadoop高手！
如何设计公司内部的数据平台
大数据产业莫让人才拖后腿
大数据工程师练成记之首重：知识体系一览！
保障危险品的物流安全问题，大数据扮演了重要角色
银行业应如何利用大数据加强信息安全
英国政府大数据的七大应用
研究丨场景：大数据挖掘的新标准
AI、大数据、和数据科学的十大类算法
我国推进大数据综合试验区建设辐射带动经济提质增效
阿里巴巴、Facebook、Cloudera等巨头的数据收集框架全攻略
数据中心的低温储能可以从冷却获取吗？
保护数据中心中的流量
如何让大数据成为电力企业竞争的核心资本？
大数据给“贷后失联”老大难问题提供了一个解决的契机
面向大数据的时空数据挖掘
大数据应用对教育行业的“五大”影响
忘了大数据吧，小数据正在引领学习个性化
大数据运用在机场容量管理的实践
实时处理大数据的分布式系统Druid-IO

zl程序教程