SpringCloud精讲课件（内附源码）

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于 2022-10-13 14:40:59 发布

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文章标签：

#spring cloud #java #spring boot

本文详细介绍了SpringCloud的实战应用，包括Rest微服务构建、Eureka服务注册与发现、Ribbon负载均衡、Feign声明式调用、Hystrix断路器和服务监控Hystrix Dashboard的使用。通过实例演示了如何创建微服务、配置Eureka服务器、使用Ribbon进行客户端负载均衡、利用Feign实现服务间的通信以及Hystrix对服务熔断和降级的处理。此外，还介绍了Zuul路由网关的配置与应用，展示了如何实现服务的统一入口和过滤功能。

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SpirngCloud精讲课件

文章目录

SpirngCloud精讲课件

中文网：https://www.springcloud.cc/

1. Rest微服务构建案例工程模块

1.总体介绍

承接着我们的springmvc+ mybatis+ mysql初级高级课程，以Dept部门模块做一个微服务通用案例Consumer消费者(Client),通过REST调用Provider提供者(Server）提供的服务

MicroServiceCloud父工程(Project)下初次带着3个子模块(Module)

microservicecloud-api：封装的整体entity/接口/公共配置等
microservicecloud-provider-dept-8001：微服务落地的服务提供者
microservicecloud-consumer-dept-80：微服务调用的客户端使用

2.本次SpringCloud的版本

3.构建步骤（SpringBoot项目未用到SpringCloud）

1. microservicecloud整体父工程Project

作用：主要是定义POM文件，将后续各个子模块公用的jar包等统一提出来，类似一个抽象父类

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>org.example</groupId>
<artifactId>microservicecloud</artifactId>
<version>1.0</version>
<modules>
    <module>microservicecloud-api</module>
    <module>microservicecloud-provider-dept-8001</module>
    <module>microservicecloud-consumer-dept-80</module>
</modules>
<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>
</properties>

<dependencyManagement>
    <dependencies>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-dependencies</artifactId>
            <version>Dalston.SR1</version>
            <type>pom</type>
            <scope>import</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-dependencies</artifactId>
            <version>1.5.9.RELEASE</version>
            <type>pom</type>
            <scope>import</scope>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.0.4</version>
        </dependency>
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
            <version>1.0.31</version>
        </dependency>
        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
            <version>1.3.0</version>
        </dependency>
        <!--日志-->
        <dependency>
            <groupId>ch.qos.logback</groupId>
            <artifactId>logback-core</artifactId>
            <version>1.2.3</version>
        </dependency>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>${junit.version}</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>log4j</groupId>
            <artifactId>log4j</artifactId>
            <version>${log4j.version}</version>
        </dependency>
    </dependencies>
</dependencyManagement>
</project>

2. microservicecloud-api公共子模块Module（继承父模块：microservicecloud）

架构图

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步骤
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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><!--子类里面显示声明才能有明确的继承表现，无意外就是父类的默认版本否则自己定义-->
  <artifactId>microservicecloud</artifactId>
  <groupId>org.example</groupId>
  <version>1.0</version>
</parent>
<modelVersion>4.0.0</modelVersion>
    <artifactId>microservicecloud-api</artifactId>

<dependencies>
    <dependency>
        <groupId>org.projectlombok</groupId>
        <artifactId>lombok</artifactId>
    </dependency>
</dependencies>
</project>

实体类（Dept）

package com.mk.demo.entity;
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
import lombok.experimental.Accessors;
import java.io.Serializable;

@Data
@AllArgsConstructor
@NoArgsConstructor
@Accessors(chain = true)//开启链式访问
//实体类-序列化接口
public class Dept implements Serializable {
   // Dept(Entity) orm mysql->Dept(table) 类表关系映射
  private Long deptno;//主键
  private String dname;//部门名称
  private String db_source;//来自那个数据库，因为微服务架构可以一个服务对应一个数据库，同一个信息被存储到不懂数据库

  public static void main(String[] args) {
   
      Dept dept = new Dept();
      dept.setDeptno(11l).setDname("zhan").setDb_source("adkfl");//链式写法
  }
}

3. microservicecloud-provider-dept-8001部门微服务提供者Module

架构图
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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>microservicecloud</artifactId>
  <groupId>org.example</groupId>
  <version>1.0</version>
</parent>
<modelVersion>4.0.0</modelVersion>
    <artifactId>microservicecloud-provider-dept-8001</artifactId>
<!-- 引入自己定义的api通用包，可以使用Dept部门Entity-->
<dependencies>
    <dependency>
        <artifactId>microservicecloud-api</artifactId>
        <groupId>org.example</groupId>
        <version>${project.version}</version>
    </dependency>
    <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
    </dependency>
    <dependency>
        <groupId>com.alibaba</groupId>
        <artifactId>druid</artifactId>
    </dependency>
    <dependency>
        <groupId>org.mybatis.spring.boot</groupId>
        <artifactId>mybatis-spring-boot-starter</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-jetty</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-test</artifactId>
    </dependency>
    <!--日志-->
    <dependency>
        <groupId>ch.qos.logback</groupId>
        <artifactId>logback-core</artifactId>
    </dependency>
    <dependency>
        <groupId>junit</groupId>
        <artifactId>junit</artifactId>
        <scope>test</scope>
    </dependency>
    <dependency>
        <groupId>log4j</groupId>
        <artifactId>log4j</artifactId>
    </dependency>
    <!--修改后立即生效，热部署-->
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>springloaded</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-devtools</artifactId>
    </dependency>
</dependencies>
</project>

配置文件（application.yml）

server:
port: 8001 # 端口号
mybatis:
config-location: classpath:mybatis/mybatis.cfg.xml # mybatis配置文件所在路径
type-aliases-package: com.mk.demo.entity           # 所有Entity别名类所在的包
mapper-locations:
    - classpath:mybatis/mapper/**/*.xml              # mapper映射文件
spring:
application:
name: microservicecloud-dept
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/aa_mk_001       # 数据库名称
username: root
password: 123456
dbcp2:
min-idle: 5                                    # 数据库连接池的最小维持连接数
initial-size: 5                                # 初始化连接数
max-total: 5                                   # 最大连接数
max-wait-millis: 200                           # 等待连接获取的最大超时时间

编写接口（DeptDao）

package com.mk.demo.dao;
import com.mk.demo.entity.Dept;
import org.apache.ibatis.annotations.Mapper;
import java.util.List;

@Mapper
public interface DeptDao {
   

  public boolean addDept(Dept dept);

  public Dept findById(Long id);

  public List<Dept> findAll();

}

编写映射文件（DeptMapper）

<?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.mk.demo.dao.DeptDao">
  <!--public Dept findById(Long id);-->
    <select id="findById" resultType="dept" parameterType="Long">
        select deptno , dname , db_source from dept where deptno = #{id};
    </select>
  <!--public List<Dept> findAll();-->
   <select id="findAll" resultType="dept">
       select deptno , dname , db_source from dept
   </select>
  <!--public boolean addDept(Dept dept);-->
  <insert id="addDept" parameterType="dept">
      insert into dept(dname,db_source) values (#{dname},DATABASE());
  </insert>
</mapper>

编写service接口（DeptService）

package com.mk.demo.service;
import com.mk.demo.entity.Dept;
import java.util.List;

public interface DeptService {
   

  public boolean add(Dept dept);

  public Dept get(Long id);

  public Lis