1.微服务架构编码构建
1.1 父工程创建
1.1.1 New Project
1.1.2 聚合工程总名字
1.1.3 maven 选版本
1.1.4 创建完成的目录结构如下，然后删除src目录，只保留pom文件
1.1.5 环境配置
开发之前先配置好环境才能事半功倍！ 1.字符编码设置，设置为UTF-８ 2.因为要用到大量的注解，配置注解生效 3.选择java编译版本 8
1.1.6 改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">
<modelVersion>4.0.0</modelVersion>
<groupId>com.junlin.springcloud</groupId>
<artifactId>cloud2020</artifactId>
<version>1.0-SNAPSHOT</version>
<!-- 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-plus.version>3.4.0</mybatis-plus.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>
<!-- JDBC驱动 -->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>${mysql.version}</version>
</dependency>
<!-- JDBC 连接池、监控组件 -->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid</artifactId>
<version>${druid.version}</version>
</dependency>
<!-- mybatis-plus 代替mybatis -->
<dependency>
<groupId>com.baomidou</groupId>
<artifactId>mybatis-plus-boot-starter</artifactId>
<version>${mybatis-plus.version}</version>
</dependency>
<!-- 单元测试 -->
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>${junit.version}</version>
</dependency>
<!-- log日志 -->
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>${log4j.version}</version>
</dependency>
<!-- lombok插件 -->
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>${lombok.version}</version>
<optional>true</optional>
</dependency>
</dependencies>
</dependencyManagement>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<version>2.2.2.RELEASE</version>
<configuration>
<fork>true</fork>
<addResources>true</addResources>
</configuration>
</plugin>
</plugins>
</build>
</project>
1.1.7 maven更新 ，完成父工程创建
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. Rest微服务工程构建
2.1 微服务提供者模块创建（支付模块）
2.1.1 新建model模块
2.1.2 修改model模块 名称 provider-payment8001
2.1.3 创建model模块成功，父pom变化
2.1.4 model 模块 改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>cloud2020</artifactId>
<groupId>com.junlin.springcloud</groupId>
<version>1.0-SNAPSHOT</version>
</parent>
<modelVersion>4.0.0</modelVersion>
<artifactId>provider-payment8001</artifactId>
<dependencies>
<!-- web actuator -->
<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>
<!-- mybatis-plus 代替mybatis -->
<dependency>
<groupId>com.baomidou</groupId>
<artifactId>mybatis-plus-boot-starter</artifactId>
</dependency>
<!-- druid -->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid-spring-boot-starter</artifactId>
<version>1.1.10</version>
</dependency>
<!-- mysql -->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
</dependency>
<!-- jdbc -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-jdbc</artifactId>
</dependency>
<!-- devtools热部署 -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<scope>runtime</scope>
<optional>true</optional>
</dependency>
<!-- lombok -->
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<optional>true</optional>
</dependency>
<!-- spring-boot-starter-test -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
</project>
2.1.5 写yml文件
server:
port: 8001
spring:
application:
name: payment-service
datasource:
type: com.alibaba.druid.pool.DruidDataSource
driver-class-name: org.gjt.mm.mysql.Driver
url: jdbc:mysql://localhost:3306/db2019?useUnicode=true&characterEncoding=utf-8&useSSL=false
username: root
password: root 注：修改成自己数据库的密码
mybatis:
mapperLocations: classpath:mapper/*.xmly
type-aliases-package: com.junlin.springcloud.entity
2.1.6 写主启动类
package com.junlin.springcloud;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
public class Payment8001 {
public static void main(String[] args) {
SpringApplication.run(Payment8001.class,args);
}
}
2.1.7 建库建表sql
CREATE DATABASE `db2020` CHARACTER SET 'utf8';
DROP TABLE IF EXISTS `payment`;
CREATE TABLE `payment` (
`id` bigint(50) NOT NULL,
`serial` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL,
PRIMARY KEY (`id`) USING BTREE
) ENGINE = InnoDB CHARACTER SET = utf8 COLLATE = utf8_general_ci ROW_FORMAT = Dynamic;
SET FOREIGN_KEY_CHECKS = 1;
2.1.8 业务类封装E
Entity-Payment实体类
package com.junlin.springcloud.entity;
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
import java.io.Serializable;
/**
* 描述: TODO Payment实体类
*
* @author: junlin
* @Date: 2020/10/21 09:06
*/
@Data
@AllArgsConstructor
@NoArgsConstructor
public class PaymentEntity implements Serializable {
private static final long serialVersionUID = 554119206766285635L;
private Long id;
private String serial;
}
Dao-PaymentDAO
package com.junlin.springcloud.payment.dao;
import com.baomidou.mybatisplus.core.mapper.BaseMapper;
import com.junlin.springcloud.payment.entity.PaymentEntity;
import org.apache.ibatis.annotations.Mapper;
import org.springframework.stereotype.Repository;
/**
* 描述: TODO (Payment)表数据库访问层
*
* @author: junlin
* @Date: 2020/10/20 20:30
*/
@Repository
@Mapper
public interface PaymentDAO extends BaseMapper<PaymentEntity> {
}
Result 工具类创建
package com.junlin.springcloud.payment.utils;
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
import java.io.Serializable;
/**
* 描述: TODO 结果返回工具类
*
* @author: junlin
* @Date: 2020/10/20 20:30
*/
@Data
@AllArgsConstructor
@NoArgsConstructor
public class Result<T> implements Serializable {
private static final long serialVersionUID = 1L;
private int code = 200;
private String msg = "success";
private T data;
public Result<T> ok(T data) {
this.setData(data);
return this;
}
public boolean success() {
return this.code == 0;
}
public Result<T> error() {
this.code = 500;
this.msg = "服务器内部错误";
return this;
}
public Result<T> error(int code) {
this.code = code;
this.msg = "服务器内部错误";
return this;
}
public Result<T> error(int code, String msg) {
this.code = code;
this.msg = msg;
return this;
}
public Result<T> error(String msg) {
this.code = 500;
this.msg = msg;
return this;
}
}
Service 和 ServiceImpl
package com.junlin.springcloud.payment.service;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.junlin.springcloud.payment.entity.PaymentEntity;
import com.junlin.springcloud.payment.utils.Result;
import javax.servlet.http.HttpServletResponse;
import java.util.List;
import java.util.Map;
/**
* (Payment)表服务接口
*
* @author junlin
* @since 2020-10-20 20:22:22
*/
public interface PaymentService {
/**
* 单个数据
*
* @param id
* @return
*/
Result<PaymentEntity> get(String id);
/**
* 保存
*
* @param entity
* @return
*/
Result save(PaymentEntity entity);
}
package com.junlin.springcloud.payment.service.impl;
import com.baomidou.mybatisplus.core.toolkit.ObjectUtils;
import com.baomidou.mybatisplus.core.toolkit.StringUtils;
import com.junlin.springcloud.payment.dao.PaymentDAO;
import com.junlin.springcloud.payment.entity.PaymentEntity;
import com.junlin.springcloud.payment.service.PaymentService;
import com.junlin.springcloud.payment.utils.Result;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
/**
* (Payment)表服务实现类
*
* @author junlin
* @since 2020-10-20 20:22:20
*/
@Slf4j
@Service("paymentService")
public class PaymentServiceImpl implements PaymentService {
@Autowired
private PaymentDAO paymentDao;
/**
* 描述 TODO 根据ID查询支付数据
* @param id
* @return
*/
@Override
public Result<PaymentEntity> get(String id) {
log.info("根据ID查询支付数据，id为->{}",id);
if(StringUtils.isBlank(id)){
// throw new RuntimeException("根据ID查询支付数据，id不能为空");
return new Result<PaymentEntity>().error("根据ID查询支付数据，id不能为空");
}
PaymentEntity entity = paymentDao.selectById(id);
return new Result<PaymentEntity>().ok(entity);
}
/**
* Payment保存
*
* @param entity
*/
@Override
@Transactional(rollbackFor = Exception.class)
public Result save(PaymentEntity entity) {
log.info("保存支付数据，支付数据为->{}",entity.toString());
if(ObjectUtils.isEmpty(entity)){
// throw new RuntimeException("保存支付数据，支付数据为空");
return new Result().error("保存支付数据，支付数据不能为空");
}
paymentDao.insert(entity);
//这个地方可以对 返回的结果进行判断
return new Result().ok("保存成功");
}
}
Controller 控制层
package com.junlin.springcloud.payment.controller;
import com.junlin.springcloud.payment.entity.PaymentEntity;
import com.junlin.springcloud.payment.service.PaymentService;
import com.junlin.springcloud.payment.utils.Result;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;
/**
* 描述 TODO PaymentController
*
* @author junlin
* @since 2020-10-20 20:22:20
*/
@RestController
public class PaymentController {
@Autowired
private PaymentService paymentService;
/**
* 描述 TODO 根据ID查询单条数据
* @param id
* @return
*/
@GetMapping("/payment/get/{id}")
public Result<PaymentEntity> get(@PathVariable("id") String id) {
return paymentService.get(id);
}
/**
* 描述 TODO 保存
* @param entity
* @return
*/
@PostMapping("/payment/save")
public Result save(@RequestBody PaymentEntity entity) {
return paymentService.save(entity);
}
}
2.1.9 启动测试
http://localhost:8001/payment/get/31
