springcloud之环境工程模块（一）

整理SpringCloud相关组件的demo，自己重新复习一下，做个记录。

首先搭建初始环境、公共模块。

一、创建一个父工程 springcloud

通过IDEA，使用maven方式创建一个父模块，将src文件删除，因为用不到。当然用不用的到 需要结合实际工作之中。

导入pom依赖

<?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.common</groupId>
    <artifactId>springcloudtest</artifactId>
    <version>1.0-SNAPSHOT</version>
    <modules>
        <module>springcloud-api</module>
        <module>springcloud-provider-dept-8001</module>
        <module>springcloud-consumer-dept-80</module>
    </modules>
    <packaging>pom</packaging>

    <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>
    </properties>
    <dependencyManagement>
        <dependencies>
            <!--cloud的jar-->
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>Greenwich.SR1</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
            <!--boot的jar-->
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-dependencies</artifactId>
                <version>2.1.4.RELEASE</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
            <!--mysql的驱动包-->
            <dependency>
                <groupId>mysql</groupId>
                <artifactId>mysql-connector-java</artifactId>
                <version>5.1.40</version>
            </dependency>
            <!--Druid数据库连接池-->
            <dependency>
                <groupId>com.alibaba</groupId>
                <artifactId>druid</artifactId>
                <version>1.1.10</version>
            </dependency>
            <!-- mybatis和boot整合的主jar包 -->
            <dependency>
                <groupId>org.mybatis.spring.boot</groupId>
                <artifactId>mybatis-spring-boot-starter</artifactId>
                <version>2.0.1</version>
            </dependency>
            <!-- logback的主jar包 -->
            <dependency>
                <groupId>ch.qos.logback</groupId>
                <artifactId>logback-core</artifactId>
                <version>1.2.3</version>
            </dependency>
            <!-- junit的测试jar包 -->
            <dependency>
                <groupId>junit</groupId>
                <artifactId>junit</artifactId>
                <version>${junit.version}</version>
                <scope>test</scope>
            </dependency>
            <!-- log4j的主jar包 -->
            <dependency>
                <groupId>log4j</groupId>
                <artifactId>log4j</artifactId>
                <version>${log4j.version}</version>
            </dependency>

            <dependency>
                <groupId>org.projectlombok</groupId>
                <artifactId>lombok</artifactId>
                <version>1.16.20</version>
            </dependency>
            <!--热部署依赖-->
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-devtools</artifactId>
                <version>2.1.2.RELEASE</version>
            </dependency>
        </dependencies>
    </dependencyManagement>
</project>

父项目pom引入的都是子项目都用的到的jar，放在父类统一版本，尽量减少版本冲突

二、创建公共子项目springcloud-api

如上图，在父模块下创建子模块

① 引入pom依赖

<?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>springcloudtest</artifactId>
        <groupId>com.common</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>
    <artifactId>springcloud-api</artifactId>
    <dependencies>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
        </dependency>
    </dependencies>
</project>

② 创建实体类

新建包com.common.springcloud.entity -> 创建实体类Dept

package com.yt.springcloud.entity;

import java.io.Serializable;

import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
import lombok.experimental.Accessors;

@AllArgsConstructor//全参构造函数
@NoArgsConstructor//无参构造函数
@Data//生成set,get
@Accessors(chain=true)//链式风格访问
public class Dept  implements Serializable{//微服务必须要实现序列化接口
    
    private Long deptNo;//主键
    private String dName;//部门名称
    private String db_source;//来自哪个数据库,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同数据库
}

三、创建服务提供者和消费者

同理用idea在父项目下创建子项目

服务提供者

① 引入pom依赖

<?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>springcloudtest</artifactId>
        <groupId>com.common</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>
    <artifactId>springcloud-provider-dept-8001</artifactId>
    <dependencies>
        <!-- 引入自己已定义的api通用包,可以使用Dept部门Entity -->
        <dependency>
            <groupId>com.common</groupId>
            <artifactId>springcloud-api</artifactId>
            <version>1.0-SNAPSHOT</version>
        </dependency>
        <!-- junit的jar包 -->
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
        </dependency>
        <!-- mysql的jar包 -->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
        </dependency>
        <!-- druid的jar包 -->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
        </dependency>
        <!--日志核心依赖-->
        <dependency>
            <groupId>ch.qos.logback</groupId>
            <artifactId>logback-core</artifactId>
        </dependency>
        <!-- mybatis的整合 -->
        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
        </dependency>
        <!-- springboot的整合web-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <!-- springboot的整合测试 -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-test</artifactId>
        </dependency>
        <!--jetty依赖相当于tomcat(springboot自带tomcat)-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-jetty</artifactId>
        </dependency>
        <!-- 修改后立即生效,热部署 (一修改,自动发布,自动构建)-->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>springloaded</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
        </dependency>
    </dependencies>
</project>

② 编写application.yml配置文件

server:
  port: 8001

mybatis:
  config-location: classpath:mybatis/mybatis-config.xml
  type-aliases-package: com.common.springcloud.entity
  mapper-locations:
    - classpath:mybatis/mapper/*.xml
spring:
  application:
    name: springcloud-provider-dept
  datasource:
    type: com.alibaba.druid.pool.DruidDataSource
    driver-class-name: org.gjt.mm.mysql.Driver
    url: jdbc:mysql://localhost:3306/db01?useUnicode=true&serverTimezone=GMT%2B8&characterEncoding=UTF-8&useSSL=false
    username: root
    password: 123456
      #以下为新增
  druid:
    # 指明是否在从池中取出连接前进行检验,如果检验失败, 则从池中去除连接并尝试取出另一个，
    #注意: 设置为true后如果要生效,validationQuery参数必须设置为非空字符串
    test-on-borrow: false
    # 指明连接是否被空闲连接回收器(如果有)进行检验.如果检测失败,则连接将被从池中去除.
    #注意: 设置为true后如果要生效,validationQuery参数必须设置为非空字符串
    test-while-idle: true
    # 指明是否在归还到池中前进行检验，注意: 设置为true后如果要生效,
    #validationQuery参数必须设置为非空字符串
    test-on-return: false
    # SQL查询,用来验证从连接池取出的连接,在将连接返回给调用者之前.
    #如果指定,则查询必须是一个SQL SELECT并且必须返回至少一行记录
    validation-query: select 1

③ 创建mybatis配置文件

创建 resources > mybatis > mybatis-config.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE configuration
        PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
    <settings>
        <!--开启二级缓存-->
        <setting name="cacheEnabled" value="true"></setting>
    </settings>
</configuration>

④ 创建mapper.xml文件

<?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.common.springcloud.dao.DeptDao">

    <select id="findById" resultType="Dept" parameterType="Long">
            select deptno,dname,db_source from dept where deptno=#{deptno}
        </select>

    <select id="findAll"  parameterType="Long" resultType="Dept">
            select deptno,dname,db_source from dept
        </select>

    <insert id="addDept"  parameterType="Long">
            insert into dept(dname,db_source) values(#{dname},database())
        </insert>
</mapper>

⑤ 创建数据库

DROP DATABASE IF EXISTS cloudDB01;
CREATE DATABASE cloudDB01 CHARACTER SET UTF8;
USE cloudDB01;
CREATE TABLE dept(
    deptno BIGINT NOT NULL PRIMARY KEY AUTO_INCREMENT,
    dname VARCHAR(60),
    db_source VARCHAR(60)
);

INSERT INTO dept(dname,db_source)VALUES ('开发部',DATABASE());
INSERT INTO dept(dname,db_source)VALUES ('人事部',DATABASE());
INSERT INTO dept(dname,db_source)VALUES ('财务部',DATABASE());
INSERT INTO dept(dname,db_source)VALUES ('市场部',DATABASE());
INSERT INTO dept(dname,db_source)VALUES ('运维部',DATABASE());

SELECT * FROM dept;

⑥ 创建dao、service、service --> impl 这些包层

具体包的创建不用多说，相关类如下

package com.common.springcloud.dao; 
import java.util.List;
import org.apache.ibatis.annotations.Mapper;
import com.yt.springcloud.entity.Dept;
@Mapper
public interface DeptDao {
    public boolean addDept(Dept dept);
    public Dept findById(Long id);
    public List<Dept> findAll();
}
package com.common.springcloud.service;
import java.util.List;
import com.yt.springcloud.entity.Dept;
//业务层接口
public interface DeptService {
    public boolean add(Dept dept);
    public Dept get(Long id);
    public List<Dept> list();
}
package com.common.springcloud.service.impl;
import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import com.yt.springcloud.dao.DeptDao;
import com.yt.springcloud.entity.Dept;
import com.yt.springcloud.service.IDeptService ;
//业务逻辑层的实现类
@Service
public class DeptServiceImpl implements DeptService {
    @Autowired
    private DeptDao deptDao;
    @Override
    public boolean add(Dept dept) {
        return deptDao.addDept(dept);
    }
    @Override
    public Dept get(Long id) {
        return deptDao.findById(id);
    }
    @Override
    public List<Dept> list() {
        return deptDao.findAll();
    }
}

⑦ 创建Controller和启动类

package com.common.springcloud.controller;
import com.common.springcloud.entity.Dept;
import com.common.springcloud.service.DeptService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.*;
import java.util.List;
@RestController//整合了responceBody+Controller
public class DeptController {
    @Autowired
    private DeptService deptService;
    @PostMapping(value="/dept/add")
    public boolean add(@RequestBody Dept dept) {
        return deptService.addDept(dept);
    }
    @GetMapping(value="/dept/get/{id}")
    public Dept get(@PathVariable("id") Long id) {
        return deptService.findById(id);
    }
    @GetMapping(value="/dept/list")
    public List<Dept> list() {
        return deptService.findAll();
    }
}

启动类略

测试验证即可

 服务消费者

① 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>springcloudtest</artifactId>
        <groupId>com.common</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>
    <artifactId>springcloud-consumer-dept-80</artifactId>

    <dependencies>
        <dependency>
            <groupId>com.common</groupId>
            <artifactId>springcloud-api</artifactId>
            <version>1.0-SNAPSHOT</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
        </dependency>
    </dependencies>
</project>

 ② 创建以下内容

package com.common.springcloud.config;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.client.RestTemplate;
@Configuration
public class ConfigBean {
    @Bean
    public RestTemplate getRestTemplate(){
        return new RestTemplate();
    }
}
package com.common.springcloud.controller;

import com.common.springcloud.entity.Dept;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;

import java.util.List;

@RestController
public class DeptController_consumer {
    @Autowired
    private RestTemplate restTemplate;
    private static final String REST_URL_PREFIX = "http://localhost:8001";
    @RequestMapping(value = "/consumer/dept/add")
    public boolean add(Dept dept){
        return restTemplate.postForObject(REST_URL_PREFIX+"/dept/add", dept, boolean.class);
    }
    @RequestMapping("/consumer/dept/get/{id}")
    public Dept get(@PathVariable("id") Long id) {
        return restTemplate.getForObject(REST_URL_PREFIX + "/dept/get/"+id, Dept.class);
    }
    @RequestMapping("/consumer/dept/list")
    public List<Dept> list() {
        return restTemplate.getForObject(REST_URL_PREFIX + "/dept/list", List.class);
    }
}
package com.common.springcloud;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class DeptConsumer80_App {
    public static void main(String[] args) {
        SpringApplication.run(DeptConsumer80_App.class, args);
    }
}

测试

先启动服务提供者，再启动服务消费者，使用消费者接口调用测试即可。

模块结构

 

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原文地址：https://www.cnblogs.com/FondWang/p/12258757.html