spring cloud 学习 day(1）

spring cloud 《1》

一、基础环境
- 1.1 版本对应
- 1.2 搭建项目
- 1.3 项目配置
- 1.4 dependencemanager
- 1.5 跳过单元测试
- 1.6 mvn:install
- 1.7 项目当前架构
- 1.8 pom配置repository
- 1.9 热部署插件devtools
二、微服务之间的简单调用
- 2.1 RestTemplate
- - 2.1.1 restTemplate实例注入
  - 2.1.2 通过restemPlate调用远程接口
- 2.2 远程接口,注意@RequestBody注解
- - 2.2.1 远程接口项目结构
  - 2.2.2 数据层接口
- 2.3 Spring Dashboard
- 2.4 数据插入数据库失败，记得加requestBody注解
- 2.5 消费者模块结构目录
- 2.6 系统重构，相似的代码提出来
- - 2.6.1 创建公共模块
  - 2.6.2 公共模块的pom
  - 2.6.3 在comm模块使用mvn clean，mvn install点击闪电标志
  - 2.6.4 删除冗余的代码，引入公共模块的
三、出错
- 3.1 dashboard出不来
- 3.2 Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.1:compile (default-compile) on project CommModule: Fatal error compiling
- 3.3 There was an unexpected error (type=Internal Server Error, status=500).400 : [{"timestamp":"2022-05-20T07:47:42.395+0000","status":400,"error":"Bad Request","message":"Required String parameter 'serial' is not present","trace":"org.springframework.web.bind.MissingServletRequest... (6011 bytes)]

一、基础环境 1.1 版本对应

1.2 搭建项目

1.3 项目配置

字符编码
注解激活生效

1.4 dependencemanager

1.5 跳过单元测试

1.6 mvn:install

将父工程发布到仓库中

1.7 项目当前架构

1.8 pom配置repository


        
            central
            Central Repository
            https://repo1.maven.org/maven2/

1.9 热部署插件devtools

子module添加pom



    org.springframework.boot
    spring-boot-devtools
    2.6.7

父工程设置plugin


        
            
                org.springframework.boot
                spring-boot-maven-plugin
                
                    true
                    true

开启自动编译选项
ctrl+alt+shift+/ -》registry
重启idea

二、微服务之间的简单调用 2.1 RestTemplate

2.1.1 restTemplate实例注入

package com.order.skill.Config;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.client.RestTemplate;

@Configuration
public class ApplicationContext {
    @Bean
    public RestTemplate getRestTemplate(){
        return new RestTemplate();
    }
}

2.1.2 通过restemPlate调用远程接口

package com.order.skill.Controller;

import com.order.skill.entities.CommenResult;
import com.order.skill.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.RequestParam;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;

import javax.annotation.Resource;

@RestController
@Slf4j
public class OrderController {
    public static final String PAYMENT_URL = "http://localhost:8081";
    @Resource
    private RestTemplate restTemplate;
    @PostMapping("/consumer/addPayment")
    public CommenResult create(@RequestParam("serial")String serial){
        Payment payment = new Payment(serial);
        return restTemplate.postForObject(PAYMENT_URL + "/addPayment", payment, CommenResult.class);
    }
    @GetMapping("/consumer/getPayment/{id}")
    public CommenResult getPayment(@PathVariable("id") int id){
        return restTemplate.getForObject(PAYMENT_URL + "/getPayment?id=" + id, CommenResult.class);
    }
}

2.2 远程接口,注意@RequestBody注解

package com.mypack.payment.Controller;

import com.mypack.payment.Service.PaymentService;
import com.mypack.payment.entities.CommenResult;
import com.mypack.payment.entities.Payment;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.*;

import javax.annotation.Resource;

@RestController
public class PaymentController {
    @Resource
    PaymentService paymentService;
    //postmapping好多浏览器不支持
    @PostMapping("/addPayment")
    public CommenResult addPayment(@RequestBody("serial")String serial){
        Payment payment = new Payment(serial);
        int i = paymentService.create(payment);
        if(i > 0){
            return new CommenResult(200,"successcrycry",payment);
        }else {
            return new CommenResult(500,"error");
        }

    }
    @GetMapping("/getPayment")
    public CommenResult getPayment(@RequestParam("id")int id){
        Payment payment = paymentService.getPayment(id);
        if(payment != null){
            return new CommenResult(200,"succ", payment);
        }else {
            return new CommenResult(500,"error");
        }
    }
}

2.2.1 远程接口项目结构

2.2.2 数据层接口

Dao层

@Mapper
public interface PaymentDao {
    @Insert("insert into payment (serial) values (#{serial})")
    public int create(Payment payment);
    @Select("select * from payment where id = #{id}")
    public Payment getPayment(@Param("id")int id);
}

2.3 Spring Dashboard

2.4 数据插入数据库失败，记得加requestBody注解

加到方法中的字段中去

2.5 消费者模块结构目录

2.6 系统重构，相似的代码提出来 2.6.1 创建公共模块

2.6.2 公共模块的pom


        
        
            org.projectlombok
            lombok
            provided
        

        
        
            cn.hutool
            hutool-all
            5.8.1
        

        
            org.springframework.boot
            spring-boot-dependencies
            2.2.2.RELEASE
            pom
            import
        
        
        
            org.springframework.cloud
            spring-cloud-dependencies
            Hoxton.SR1
            pom
            import

2.6.3 在comm模块使用mvn clean，mvn install点击闪电标志

mvn clean结果

2.6.4 删除冗余的代码，引入公共模块的三、出错 3.1 dashboard出不来

idea 项目名右键->show in explorer
点进自己的项目->.idea->workspace.xml
添加相关配置

3.2 Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.1:compile (default-compile) on project CommModule: Fatal error compiling

主项目的pom中mvn的版本与jdk要对应起来

1.8
1.8

3.3 There was an unexpected error (type=Internal Server Error, status=500).400 : [{“timestamp”:“2022-05-20T07:47:42.395+0000”,“status”:400,“error”:“Bad Request”,“message”:“Required String parameter ‘serial’ is not present”,“trace”:"org.springframework.web.bind.MissingServletRequest… (6011 bytes)]

spring cloud 学习 day(1）

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