1.微服务cloud整体聚合父工程Project
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New Project
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聚合总父工程名字
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Maven选版本
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工程名字
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字符编码
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注解生效激活
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Java编译版本选8
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File Type过滤
2.父工程POM
2.1Pom.xml文件
<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>
<!--gav maven坐标-->
<!--pom表示是一个maven父工程-->
<groupId>com.atguigu.springcloud</groupId>
<artifactId>cloud2022</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>pom</packaging>
<!--统一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>
<!--dependencyManagement:子模块继承之后,提供作用:锁定版本+子module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.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>
<distributionManagement>
<site>
<id>website</id>
<url>scp://webhost.company.com/www/website</url>
</site>
</distributionManagement>
<build>
<finalName>cloud2022</finalName>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<version>2.3.5.RELEASE</version>
<configuration>
<fork>true</fork>
<addResources>true</addResources>
</configuration>
</plugin>
</plugins>
</build>
</project>
2.2问题:Maven中的DependencyManagement和Dependencies区别
解答:
dependencyManagement:
Maven 使用dependencyManagement 元素来提供了一种管理依赖版本号的方式。
通常会在一个组织或者项目的最顶层的父POM 中看到dependencyManagement 元素。
使用pom.xml 中的dependencyManagement 元素能让所有在子项目中引用一个依赖而不用显式的列出版本号。
Maven 会沿着父子层次向上走,直到找到一个拥有dependencyManagement 元素的项目,然后它就会使用这个dependencyManagement 元素中指定的版本号。
好处:如果有多个子项目都引用同一样依赖,则可以避免在每个使用的子项目里都声明一个版本号,这样当想升级或切换到另一个版本时,只需要在顶层父容器里更新,而不需要一个一个子项目的修改;另外如果某个子项目需要另外的一个版本,只需要声明version就可。
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dependencyManagement 里只是声明依赖,并不实现引入,因此子项目需要显示的声明需要用的依赖
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如果不在子项目中声明依赖,是不会从父项目中继承下来的;只有在子项目中写了该依赖项,并且没有指定具体版本,才会从父项目中继承该项,并且version和scope都读取自父pom
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如果子项目中指定了版本号,那么会使用子项目中指定的jar版本
2.2Maven中如何跳过单元测试
生命周期中的test会有横线
2.3父工程创建完成执行mvn:install将父工程发布到仓库方便子工程继承
2.4Rest微服务工程构建
消费者调用支付模块
约定 > 配置 > 编码
如何构建微服务模块?
- 建module
- 改POM
- 写YML
- 主启动
- 业务类
2.4.1cloud-provider-payment8001微服务提供者支付模块
1. 建cloud-provider-payment8001
创建完成后到父工程查看pom文件变化
2. 改POM
<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>
<parent>
<groupId>com.atguigu.springcloud</groupId>
<artifactId>cloud2022</artifactId>
<version>1.0-SNAPSHOT</version>
</parent>
<artifactId>cloud-provider-payment8001</artifactId>
<properties>
<maven.compiler.source>8</maven.compiler.source>
<maven.compiler.target>8</maven.compiler.target>
</properties>
<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 com.mysql.jdbc.Driver
url: jdbc:mysql://localhost:3306/cloud22?useUnicode=true&characterEncoding=utf-8&useSSL=false
username: root
password: 123456
mybatis:
mapperLocations: classpath:mapper/*.xml
type-aliases-package: com.atguigu.springcloud.entities # 所有Entity别名类所在包
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(200) DEFAULT '',
PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=1 DEFAULT CHARSET=utf8
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entities
主实体Payment类package com.atguigu.springcloud.entities; import lombok.AllArgsConstructor; import lombok.Data; import lombok.NoArgsConstructor; import java.io.Serializable; /** * 简要描述 * * @Author: ASuLe * @Date: 2023/1/11 16:42 * @Version: 1.0 * @Description: 文件作用详细描述.... */ @Data @AllArgsConstructor @NoArgsConstructor public class Payment implements Serializable { private Long id; private String serial; }
json封装类
package com.atguigu.springcloud.entities; import lombok.AllArgsConstructor; import lombok.Data; import lombok.NoArgsConstructor; /** * 简要描述 * * @Author: ASuLe * @Date: 2023/1/11 16:45 * @Version: 1.0 * @Description: Json封装类 */ @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); } }
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dao
dao层package com.atguigu.springcloud.dao; import com.atguigu.springcloud.entities.Payment; import org.apache.ibatis.annotations.Mapper; import org.apache.ibatis.annotations.Param; /** * 简要描述 * * @Author: ASuLe * @Date: 2023/1/11 16:48 * @Version: 1.0 * @Description: payment */ @Mapper public interface PaymentDao { public int create(Payment payment); public Payment getPaymentById(@Param("id") Long id); }
xml隐射文件
<?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.atguigu.springcloud.dao.PaymentDao"> <!--id是数据库里叫什么,property是Java里叫什么,jdbcType对应的类型是什么--> <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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service
接口PaymentServicepackage com.atguigu.springcloud.service; import com.atguigu.springcloud.entities.Payment; import org.apache.ibatis.annotations.Param; /** * 简要描述 * * @Author: ASuLe * @Date: 2023/1/11 17:07 * @Version: 1.0 * @Description: 文件作用详细描述.... */ public interface PaymentService { public int create(Payment payment); public Payment getPaymentById(@Param("id") Long id); }
实现类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; /** * 简要描述 * * @Author: ASuLe * @Date: 2023/1/11 17:08 * @Version: 1.0 * @Description: 文件作用详细描述.... */ @Service public class PaymentServiceImpl implements PaymentService { //@Autowired @Resource都可以进行依赖注入 @Resource private PaymentDao paymentDao; @Override public int create(Payment payment) { return paymentDao.create(payment); } @Override public Payment getPaymentById(Long id) { return paymentDao.getPaymentById(id); } }
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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; /** * 简要描述 * * @Author: ASuLe * @Date: 2023/1/11 17:11 * @Version: 1.0 * @Description: 文件作用详细描述.... */ @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("*****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 getPaymentById(@PathVariable("id") Long id){ Payment payment = paymentService.getPaymentById(id); log.info("*****查询结果:" + 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); } } }
测试
查询测试
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浏览器更多是为了查看,不太支持post请求,使用postman
查看数据库