尚硅谷2020最新版SpringCloud(H版&alibaba)框架开发教程学习一 基础篇(1):父工程及支付模块创建

尚硅谷周阳老师的课程,还是挺不错的,这是视频地址,https://www.bilibili.com/video/BV18E411x7eT,可以跟着学习,此为个人学习笔记,备后期查看.

一. 基础篇-父工程项目的创建步骤

1. 选择maven工程创建

2. 字符编码环境修改

3. 注解支持

4.java编译版本选择8

5. FileType过滤

6. 父工程POM文件的设置

跳过单元测试设置

  
<properties>
    <project.build.sourceEncoding>UTF-8project.build.sourceEncoding>
    <maven.compiler.source>1.8maven.compiler.source>
    <maven.compiler.target>1.8maven.compiler.target>
    <junit.version>4.12junit.version>
    <log4j.version>1.2.17log4j.version>
    <lombok.version>1.16.18lombok.version>
    <mysql.version>5.1.47mysql.version>
    <druid.version>1.1.16druid.version>
    <mybatis.spring.boot.version>1.3.2mybatis.spring.boot.version>
  properties>

  <dependencyManagement>
    <dependencies>
        
      <dependency>
        <groupId>org.springframework.bootgroupId>
        <artifactId>spring-boot-dependenciesartifactId>
        <version>2.2.2.RELEASEversion>
        <type>pomtype>
        <scope>importscope>
      dependency>
        
      <dependency>
        <groupId>org.springframework.cloudgroupId>
        <artifactId>spring-cloud-dependenciesartifactId>
        <version>Hoxton.SR1version>
        <type>pomtype>
        <scope>importscope>
      dependency>
      
      <dependency>
        <groupId>com.alibaba.cloudgroupId>
        <artifactId>spring-cloud-alibaba-dependenciesartifactId>
        <version>2.1.0.RELEASEversion>
        <type>pomtype>
        <scope>importscope>
      dependency>
      <dependency>
        <groupId>mysqlgroupId>
        <artifactId>mysql-connector-javaartifactId>
        <version>${mysql.version}version>
      dependency>
      <dependency>
        <groupId>com.alibabagroupId>
        <artifactId>druidartifactId>
        <version>${druid.version}version>
      dependency>
      <dependency>
        <groupId>org.mybatis.spring.bootgroupId>
        <artifactId>mybatis-spring-boot-starterartifactId>
        <version>${mybatis.spring.boot.version}version>
      dependency>
      <dependency>
        <groupId>log4jgroupId>
        <artifactId>log4jartifactId>
        <version>${log4j.version}version>
      dependency>
      <dependency>
        <groupId>junitgroupId>
        <artifactId>junitartifactId>
        <version>${junit.version}version>
      dependency>
      <dependency>
        <groupId>org.projectlombokgroupId>
        <artifactId>lombokartifactId>
        <version>${lombok.version}version>
        <optional>trueoptional>
      dependency>
    dependencies>
  dependencyManagement>

二. 基础篇-支付模块payment创建流程

1. 新建module

父工程项目上右键单击新建module


下一步之后注意重新修改为cloud-provide-paymen8001

2. 修改pom文件,添加相关依赖

<dependencies>
        <dependency>
            <groupId>org.springframework.cloudgroupId>
            <artifactId>spring-cloud-starter-zipkinartifactId>
        dependency>
        <dependency>
            <groupId>com.sc2020groupId>
            <artifactId>cloud-api-commonsartifactId>
            <version>1.0-SNAPSHOTversion>
        dependency>
        <dependency>
            <groupId>org.springframework.bootgroupId>
            <artifactId>spring-boot-starter-webartifactId>
        dependency>
        <dependency>
            <groupId>org.springframework.bootgroupId>
            <artifactId>spring-boot-starter-actuatorartifactId>
        dependency>
        <dependency>
            <groupId>org.mybatis.spring.bootgroupId>
            <artifactId>mybatis-spring-boot-starterartifactId>
        dependency>
        <dependency>
            <groupId>com.alibabagroupId>
            <artifactId>druid-spring-boot-starterartifactId>
            <version>1.1.10version>
        dependency>
        <dependency>
            <groupId>mysqlgroupId>
            <artifactId>mysql-connector-javaartifactId>
        dependency>
        <dependency>
            <groupId>org.springframework.bootgroupId>
            <artifactId>spring-boot-starter-jdbcartifactId>
        dependency>
        <dependency>
            <groupId>org.springframework.bootgroupId>
            <artifactId>spring-boot-starter-testartifactId>
            <scope>testscope>
        dependency>
        <dependency>
            <groupId>org.springframework.bootgroupId>
            <artifactId>spring-boot-devtoolsartifactId>
            <scope>runtimescope>
            <optional>trueoptional>
        dependency>
        
        <dependency>
            <groupId>org.springframework.cloudgroupId>
            <artifactId>spring-cloud-starter-netflix-eureka-clientartifactId>
        dependency>
    dependencies>

3. application.yml配置

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://192.168.1.9:3306/springboot2020?useUnicode=true&characterEncoding=utf-8&useSSL=false
    username: root
    password: 123456
mybatis:
  mapper-locations: classpath:mapper/*.xml
  type-aliases-package: com.iyoker.springcloud.entities #所有Entity别名类所在包

4. 创建主启动类

@SpringBootApplication
public class PaymentMain8001 {
     public static void main(String[] args) {
             SpringApplication.run(PaymentMain8001.class, args);
         }
}

5. 业务类的创建流程

1. 建表SQL

CREATE TABLE `payment`(
    `id` bigint(20) NOT NULL AUTO_INCREMENT COMMENT 'ID',
    `serial` varchar(200) DEFAULT '',
    PRIMARY KEY (`id`)
) ENGING=InnoDB AUTO_INCREMENT=1 DEFAULT CHARSET=utf8

2. entities

1.创建Payment.java类

@Data
@AllArgsConstructor
@NoArgsConstructor
public class Payment implements Serializable {
  private Long id;
  private String serial;
}

2. 创建CommonResult.java->返回前端的方法类

@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. dao层

1. 创建PaymentDao.java

推荐使用@Mapper这个注解

@Mapper
public interface PaymentDao {
    int create(Payment payment);
    Payment getPaymentById(@Param("id")long id);
}

2.创建PaymentMapper.xml文件

<mapper namespace="com.iyoker.springcloud.dao.PaymentDao">
    <insert id="create" parameterType="Payment" useGeneratedKeys="true" keyProperty="id">
        insert into payment(serial) values (#{serial});
    insert>
    <resultMap id="BaseResultMap" type="com.iyoker.springcloud.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>

4.Service层

public interface PaymentService {
    int create(Payment payment);
    Payment getPaymentById(@Param("id")Long id);
}

注意添加@Service注解

@Service
public class PaymentServiceImpl  implements PaymentService {
    @Resource
    private PaymentDao paymentDao;
    @Override
    public int create(Payment payment) {
        return paymentDao.create(payment);
    }
    @Override
    public Payment getPaymentById(Long id) {
        return paymentDao.getPaymentById(id);
    }
}

5. Controller层

注意添加@RestController注解
返回前端用CommonResult类
注意注解为@PostMapping的方法上,相关参数要加@RequestBody,如create( )方法
否则插入数据为Null

@RestController
@Slf4j
public class PaymentController {
    @Resource
    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, "插入数据库成功", result);
        } else {
            return new CommonResult(444, "插入数据库失败");
        }
    }
    @GetMapping(value = "/payment/get/{id}")
    public CommonResult getPaymentById(@PathVariable("id") Long id) {
        Payment payment = paymentService.getPaymentById(id);
        log.info("***查询结果:{}", payment.toString());
        if (payment != null) {
            return new CommonResult(200, "查询成功", payment);
        } else {
            return new CommonResult(555, "查询失败,没有对应记录,查询id为:" + id);
        }
    }
}