（三）、Rest微服务支付模块构建
支付模块构建
创建微服务模块套路
建Module
此时父工程POM多了一个
改POM
在子工程pom中
<dependencies>
<!--包含了sleuth+zipkin-->
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-zipkin</artifactId>
</dependency>
<!--eureka-client-->
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
</dependency>
<!-- 引入自己定义的api通用包，可以使用Payment支付Entity -->
<!--
<dependency>
<groupId>com.atguigu.springcloud</groupId>
<artifactId>cloud-api-commons</artifactId>
<version>${project.version}</version>
</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>
<!--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>
写YML
在Resouse文件夹下新建一个application.yml文件
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: com.mysql.jdbc.Driver # mysql驱动包
url: jdbc:mysql://waiwanga.mysql.rds.aliyuncs.com:3306/student?useUnicode=true&characterEncoding=utf-8&useSSL=false
username: root
password: xxxx
mybatis:
mapperLocations: classpath:mapper/*.xml
type-aliases-package: com.ylc.cloud.entities # 所有Entity别名类所在包
主启动
package com.ylc.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);
}
}
业务类
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=utf8mb4
实体类：
实体类Payment
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;
}
JSON封装体CommonResult：
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
@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);
}
}
DAO
接口PaymentDao
package com.ylc.cloud.dao;
import com.ylc.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);
}
MyBatis映射文件PaymentMapper.xml，路径：resources/mapper/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.ylc.cloud.dao.PaymentDao">
<insert id="create" parameterType="Payment" useGeneratedKeys="true" keyProperty="id">
insert into payment(serial) values(#{serial});
</insert>
<resultMap id="BaseResultMap" type="com.lun.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>
useGeneratedKeys是允许主键自动生成
Service
接口PaymentService
package service;
import com.ylc.cloud.entities.Payment;
import org.apache.ibatis.annotations.Param;
public interface PaymentService {
public int create(Payment payment);
public Payment getPaymentById(@Param("id") Long id);
}
实现类
package service.impl;
import com.ylc.cloud.dao.PaymentDao;
import com.ylc.cloud.entities.Payment;
import org.springframework.stereotype.Service;
import javax.annotation.Resource;
@Service
public class PaymentServiceImpl implements PaymentService {
@Resource
private PaymentDao paymentDao;
public int create(Payment payment)
{
return paymentDao.create(payment);
}
public Payment getPaymentById(Long id)
{
return paymentDao.getPaymentById(id);
}
}
Controller
package com.ylc.cloud.controller;
import com.ylc.cloud.entities.CommonResult;
import com.ylc.cloud.entities.Payment;
import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RestController;
import service.PaymentService;
import javax.annotation.Resource;
@Slf4j
@RestController
public class PaymentController {
@Resource
private PaymentService paymentService;
@PostMapping(value = "/payment/create")
public CommonResult creat(@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",null);
}
}
}
测试
Description: A component required a bean of type 'service.PaymentService' that could not be found.
找不到Service，原因是因为项目启动时，只有@SpringBootApplication 所在的包被扫描，在本例中，启动类是MainApplication.java, 也就是MainApplication.java类所在的这个包，而其他的controller和service以及mapper在其他的包里，所以并没有被扫描。解决方法是，把启动类放在外层包
Postman测试：
http://localhost:8001/payment/create?serial=lun2
热部署Devtools
开发时使用、生产环境关闭
1.在项目中添加devtools
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<scope>runtime</scope>
<optional>true</optional>
</dependency>
2.复制到总工程pom
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<configuration>
<fork>true</fork>
<addResources>true</addResources>
</configuration>
</plugin>
</plugins>
3.设置自动构建项目
4.并行编译独立模块
ctrl+shirt+Alt+/快捷键，打开Registry
重启idea以后，每次修改项目都会帮我们直接重新启动，方便调试程序
