SpringCloud04-编码实现:订单支付模块
SpringCloud系列文档地址: SpringCloud 进阶之路
1、IDEA新建空的父Project
IDEA和Eclipse不同,没有工作空间的概念,所以我们都是创建一个空的父Project,然后在里面New Module。
1.1 配置Maven
在创建Project之前,需要先配置我们的maven,要求maven的版本是3.5以上,File——Other Settings——Settings For New Projects:
1.2 创建空父Project
1.2.1 创建一个Project:springcloud2020
File —— New —— Project:JDK要求1.8
1.2.2 配置字符编码
1.2.3 开启注解生效
1.2.4 选择Java编译版本为1.8
1.2.5 FileType文件过滤,删除src目录
因为创建的工程中,会出现后缀为 .idea 和 .iml 的文件,为了不显示他们,可以设置FileType,过滤掉他们:
因为父工程不会写代码,所以删除src目录。只留下一个pom.xml文件即可。
1.3 父工程的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.zdw.springcloud</groupId>
<artifactId>springcloud2020</artifactId>
<version>1.0-SNAPSHOT</version>
<modules>
<module>cloud-provider-payment8001</module>
</modules>
<!--打包方式-->
<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>8.0.19</mysql.version>
<druid.version>1.1.16</druid.version>
<hutool-all.version>5.1.0</hutool-all.version>
<spring.boot.version>2.2.2.RELEASE</spring.boot.version>
<spring.cloud.version>Hoxton.SR1</spring.cloud.version>
<spring.cloud.alibaba.version>2.1.0.RELEASE</spring.cloud.alibaba.version>
<mybatis.spring.boot.version>1.3.0</mybatis.spring.boot.version>
<druid.spring.boot.starter.version>1.1.1</druid.spring.boot.starter.version>
</properties>
<!--子模块继承后,提供作用:锁定版本+子module不用groupId和version-->
<dependencyManagement>
<dependencies>
<!--springboot 2.2.2-->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-dependencies</artifactId>
<version>${spring.boot.version}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
<!--Spring cloud Hoxton.SR1-->
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-dependencies</artifactId>
<version>${spring.cloud.version}</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>${spring.cloud.alibaba.version}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>${mysql.version}</version>
</dependency>
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid</artifactId>
<version>${druid.version}</version>
</dependency>
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid-spring-boot-starter</artifactId>
<version>${druid.spring.boot.starter.version}</version>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>${lombok.version}</version>
</dependency>
<!--MyBatis的依赖-->
<dependency>
<groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId>
<version>${mybatis.spring.boot.version}</version>
</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>
<!--第三方maven私服-->
<repositories>
<repository>
<id>nexus-aliyun</id>
<name>Nexus aliyun</name>
<url>http://maven.aliyun.com/nexus/content/groups/public</url>
<releases>
<enabled>true</enabled>
</releases>
<snapshots>
<enabled>false</enabled>
</snapshots>
</repository>
</repositories>
</project>
dependencyManagement 和 dependency 的区别:
1、dependencyManagement 一般只会出现在父pom文件中,它可以让子项目引入依赖只会,不用显示的指定版本号,做到统一管理版本的目的。Maven会沿着父子层次向上走,直到找到一个有dependencyManagement 元素的项目,然后就会使用 dependencyManagement 指定的版本号;所以在子项目中可以不显示的指定版本号。
2、如果子项目中没有声明依赖,是不会从父项目中继承下来的;只有在子项目中声明了该依赖项,并且没有指定具体的版本,才会从父项目中继承下来;
3、如果子项目中显示声明了版本号,那么就会使用子项目中指定的版本的依赖。
这样做的好处就是:如果有多个子项目都引用同一样的依赖,则可以避免在每个使用的子项目里都声明一个版本号,这样想升级或切换到另一个版本时,只需在顶层父容器里更新,而不需要一个一个子项目的修改l;另外如果某个子项目需要另外的一个版本,只需声明version版本 。
2、支付模块payment8001
2.1 五个步骤和sql文件
1、建Module
2、改pom文件
3、写yml文件
4、写主启动类
5、编写业务逻辑
sql执行语句:
CREATE TABLE `payment` (
`id` BIGINT(20) NOT NULL AUTO_INCREMENT COMMENT '主键',
`serial` VARCHAR(200) CHARACTER SET utf8 COLLATE utf8_general_ci DEFAULT NULL COMMENT '支付流水号',
PRIMARY KEY (`id`) USING BTREE
) ENGINE = INNODB CHARACTER SET = utf8 COLLATE = utf8_general_ci COMMENT = '支付表' ROW_FORMAT = DYNAMIC;
2.2 创建Module
在刚才创建的SpringCloud2020,右键 New —— Module ,JDK选择1.8,不要使用Maven骨架:
2.3 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>springcloud2020</artifactId>
<groupId>com.zdw.springcloud</groupId>
<version>1.0-SNAPSHOT</version>
</parent>
<modelVersion>4.0.0</modelVersion>
<artifactId>cloud-provider-payment8001</artifactId>
<description>支付模块</description>
<dependencies>
<!--web和actuator基本是绑定到一块使用的-->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<!--监控-->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-actuator</artifactId>
</dependency>
<!--MyBatis的依赖-->
<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>
<!--如果没写版本,从父层面找,找到了就直接用,全局统一-->
<!--<version>1.1.1</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>
<!--热部署-->
<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>
2.4 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
url: jdbc:mysql://localhost:3306/my?useUnicode=true&characterEncoding=utf-8&useSSL=false
username: root
password: 1234
mybatis:
mapperLocations: classpath:mapper/*.xml
type-aliases-package: com.lun.springcloud.entities # 所有Entity别名类所在包
2.5 编写主启动类
package com.zdw.springcloud;
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);
}
}
2.6 编写业务代码
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
Entities:
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:
import com.atguigu.springcloud.entities.Payment;
import org.apache.ibatis.annotations.Mapper;
import org.apache.ibatis.annotations.Param;
/**
*/
@Mapper
//@Repository不用Spring的
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.lun.springcloud.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>
Service:
接口PaymentService
import com.lun.springcloud.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
import com.lun.springcloud.dao.PaymentDao;
import com.lun.springcloud.entities.Payment;
import com.lun.springcloud.service.PaymentService;
import org.apache.ibatis.annotations.Param;
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:
import com.lun.springcloud.entities.CommonResult;
import com.lun.springcloud.entities.Payment;
import com.lun.springcloud.service.PaymentService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.cloud.client.ServiceInstance;
import org.springframework.web.bind.annotation.*;
import org.springframework.cloud.client.discovery.DiscoveryClient;
import javax.annotation.Resource;
import java.util.List;
import java.util.concurrent.TimeUnit;
/**
*/
@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,serverPort: "+serverPort,result);
}else{
return new CommonResult(444,"插入数据库失败",null);
}
}
@GetMapping(value = "/payment/get/{id}")
public CommonResult<Payment> getPaymentById(@PathVariable("id") Long id)
{
Payment payment = paymentService.getPaymentById(id);
if(payment != null)
{
return new CommonResult(200,"查询成功,serverPort: "+serverPort,payment);
}else{
return new CommonResult(444,"没有对应记录,查询ID: "+id,null);
}
}
}
6.测试
浏览器 - http://localhost:8001/payment/get/1
Postman - http://localhost:8001/payment/create?serial=lun2
7.小总结
创建微服务模块套路:
建Module
改POM
写YML
主启动
业务类
3、公共模块common
因为项目中很多地方都要用到一些实体和工具类,如果在每个工程中都要创建肯定是不行的。对于这种公共的东西,我们应该进行抽取,所以可以创建一个cloud-api-common模块,里面主要存放的就是相关的实体类和工具类:
创建cloud-api-common模块的方式和payment8001是一样的,不要选maven骨架,创建之后,修改pom文件:
3.1 改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">
<parent>
<artifactId>springcloud2020</artifactId>
<groupId>com.zdw.springcloud</groupId>
<version>1.0-SNAPSHOT</version>
</parent>
<modelVersion>4.0.0</modelVersion>
<artifactId>cloud-api-common</artifactId>
<description>公共模块</description>
<dependencies>
<!-- 热部署 -->
<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>
<!-- 糊涂工具类的依赖 -->
<dependency>
<groupId>cn.hutool</groupId>
<artifactId>hutool-all</artifactId>
<version>${hutool-all.version}</version>
</dependency>
</dependencies>
</project>
注意:里面引入了hutool工具类,它的官网地址是: https://hutool.cn/docs/#/ ,它对很多我们常用的进行了封装,我们可以直接使用。
3.2 创建实体
3.2.1 编写Payment
package com.zdw.springcloud.entities;
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
import java.io.Serializable;
@Data //get/set以及toString方法
@NoArgsConstructor //无参构造
@AllArgsConstructor //有参构造
public class Payment implements Serializable {
private Long id;
/**
* 支付流水号
*/
private String serial;
}
3.2.2 编写统一的返回结果类
package com.zdw.springcloud.entities;
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
@Data //get/set以及toString方法
@NoArgsConstructor //无参构造
@AllArgsConstructor //有参构造
public class CommonResult<T> {
private Integer code;
private String message;
private T data;
public CommonResult(Integer code, String message) {
this(code, message, null);
}
}
创建完成之后,我们需要执行install操作,安装到我们的仓库里面,然后其他的模块才能引入它。
4、编写支付模块payment8001的业务代码
4.1 改pom.xml
因为我们的业务代码需要用到cloud-api-common的实体类,所以需要在pom.xml文件中添加cloud-api-common的依赖:
<!--引入公共模块的依赖-->
<dependency>
<groupId>com.zdw.springcloud</groupId>
<artifactId>cloud-api-common</artifactId>
<version>1.0-SNAPSHOT</version>
</dependency>
4.2 编写dao
package com.zdw.springcloud.dao;
import com.zdw.springcloud.entities.Payment;
import org.apache.ibatis.annotations.Mapper;
import org.apache.ibatis.annotations.Param;
@Mapper
public interface PaymentDao {
/**
* 新增
* @param payment
*/
int create(Payment payment);
/**
* 根据Id查询
* @param id
*/
Payment getPaymentById(@Param("id") Long id);
}
注意:类上要用 @Mapper 注解修饰,表明这是一个MyBatis的Mapper接口
4.3 编写service业务层代码
4.3.1 service业务接口
package com.atguigu.springcloud.service;
import com.atguigu.springcloud.entities.Payment;
public interface PaymentService {
/**
* 新增
*/
int create(Payment payment);
/**
* 根据Id查询
*/
Payment getPaymentById(Long id);
}
4.3.2 service实现类
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.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
@Service
public class PaymentServiceImpl implements PaymentService {
@Autowired
private PaymentDao paymentDao;
/**
* 新增
*/
@Override
public int create(Payment payment) {
return paymentDao.create(payment);
}
/**
* 根据Id查询
*/
@Override
public Payment getPaymentById(Long id) {
return paymentDao.getPaymentById(id);
}
}
4.4 编写controller
package com.zdw.springcloud.controller;
import com.zdw.springcloud.entities.CommonResult;
import com.zdw.springcloud.entities.Payment;
import com.zdw.springcloud.service.PaymentService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.*;
@RestController
@Slf4j //日志记录,添加这个注解之后,可以直接使用 log
public class PaymentController {
@Autowired
PaymentService paymentService;
@Value("${server.port}")//从配置文件中获取server.port的值
String serverPort;
@PostMapping(value = "payment/create")
public CommonResult create(@RequestBody Payment payment){
int result = paymentService.create(payment);
if(result>0){
return new CommonResult(200,"++插入数据库成功,serverPort:" + serverPort, result);
}
return new CommonResult(444,"--插入数据库失败,serverPort:" + serverPort, null);
}
@GetMapping(value = "payment/get/{id}")
public CommonResult<Payment> get(@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,serverPort:" + serverPort, payment);
}
return new CommonResult(444, "没有对应记录,查询ID:" + id, null);
}
}
注意:类上使用@RestController注解,相当于 @ResponseBody和@Controller,返回的json数据;
create(@RequestBody Payment payment) :注意create方法的形参一定要使用@RequestBody进行修饰,否则,数据保存就会不成功。
4.5 测试
4.5.1 测试create进行新增操作
需要用到PostMan工具类,因为浏览器地址不支持post请求:
返回结果成功:
{
“code”: 200,
“message”: “++插入数据库成功111,serverPort:8001”,
“data”: 1
}
4.5.2 测试get方法获取数据
直接浏览器访问:http://localhost:8001/payment/get/1 能访问到数据就是成功了,建议使用火狐浏览器,它能格式化json数据
5、热部署devtools
为了方便修改代码,进行调试的方便,我们希望修改之后立马生效,而不是重启工程。Spring为我们提供了热部署操作。热部署需要执行以下几步:
5.1 添加devtools依赖
在需要热部署的工程的pom文件中,引入devtools依赖:
org.springframework.boot spring-boot-devtools runtime true
之前的工程payment8001在前面以及引入了该依赖。
5.2 添加一个maven插件
在pom文件中添加下面的maven插件,本次我们可以在父Project的pom文件中添加,这样子项目就都可以使用了:
<build>
<fileName>你自己的工程名字<fileName>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<configuration>
<fork>true</fork>
<addResources>true</addResources>
</configuration>
</plugin>
</plugins>
</build>
5.3 IDEA开启自动构建
5.4 IDEA开启热注册,更新我们的值
快捷键:crtl+shift+alt+/ 选择第一个 registry
5.5 重启IDEA
然后我们修改之后,idea就会自动编译,能立马看到结果以及改了。6、订单模块order80
6.1 创建module
6.2 改pom
<?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>springcloud2020</artifactId>
<groupId>com.zdw.springcloud</groupId>
<version>1.0-SNAPSHOT</version>
</parent>
<modelVersion>4.0.0</modelVersion>
<artifactId>cloud-consumer-order80</artifactId>
<description>订单消费者</description>
<dependencies>
<!--引入公共模块-->
<dependency>
<groupId>com.zdw.springcloud</groupId>
<artifactId>cloud-api-common</artifactId>
<version>1.0-SNAPSHOT</version>
</dependency>
<!--web和actuator监控 一般要一起-->
<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>
<!--热部署-->
<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>
6.3 写yml
server:
port: 80
spring:
application:
name: cloud-consumer-order
6.4 主启动类OrderMain80
package com.zdw.springcloud;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
public class OrderMain80 {
public static void main(String[] args) {
SpringApplication.run(OrderMain80.class,args);
}
}
6.5 业务编码
6.5.1 注册RestTemplate
RestTemplate提供了多种便捷访问远程Http服务的方法,是一种简单便捷的访问RESTful服务的模板类,是Spring提供的用于访问Rest服务的客户端模板工具集;
官方网址:
https://docs.spring.io/spring-framework/docs/5.2.2.RELEASE/javadoc-api/org/springframework/web/client/RestTemplate.html
package com.zdw.springcloud.config;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.client.RestTemplate;
@Configuration
public class OrderConfig {
/**
* 注册RestTemplate
* @return
*/
@Bean
public RestTemplate restTemplate(){
return new RestTemplate();
}
}
6.5.2 编写controller
客户端80是通过远程调用8001的支付服务的,所以它只要一个Controller来接受请求就可以了,不需要编写service和dao等;
package com.zdw.springcloud.controller;
import com.zdw.springcloud.entities.CommonResult;
import com.zdw.springcloud.entities.Payment;
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.RestController;
import org.springframework.web.client.RestTemplate;
import javax.annotation.Resource;
@RestController
@Slf4j
public class OrderController {
//支付服务的地址
public static final String PAYMENT_URL = "http://localhost:8001";
@Resource
RestTemplate restTemplate;
@GetMapping("/consumer/payment/create")
public CommonResult<Payment> create(Payment payment){
return restTemplate.postForObject(PAYMENT_URL + "/payment/create", payment, CommonResult.class);
}
@GetMapping("consumer/payment/get/{id}")
public CommonResult<Payment> get(@PathVariable("id") Long id){
log.info("====从80去查询了8001支付模块....");
return restTemplate.getForObject(PAYMENT_URL+"/payment/get/"+id,CommonResult.class);
}
}
6.6 测试
浏览器访问:http://localhost/consumer/payment/create?serial=zdw19910904 新增数据成功。
浏览器访问:http://localhost/consumer/payment/get/2 可以查询到刚才新增的数据