创建一个普通的Maven项目

 

 

 pom.xml父工程

<?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.kuang</groupId>
    <artifactId>springcloud</artifactId>
    <version>1.0-SNAPSHOT</version>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <maven.compiler.source>8</maven.compiler.source>
        <maven.compiler.target>8</maven.compiler.target>
        <junit.version>4.12</junit.version>
        <lombok.version>1.16.10</lombok.version>
        <log4j.version>1.2.17</log4j.version>
    </properties>

    <!-- 打包方式  pom    -->
    <packaging>pom</packaging>

    <dependencyManagement>
            <dependencies>
            <!--  springCloud依赖      作为版本管理依赖，所以类型是pom，在导入依赖的时候生效        -->
                <dependency>
                    <groupId>org.springframework.cloud</groupId>
                    <artifactId>spring-cloud-dependencies</artifactId>
                    <version>Greenwich.SR1</version>
                    <type>pom</type>
                    <scope>import</scope>
                </dependency>
                <!--  springBoot依赖              -->
                <dependency>
                    <groupId>org.springframework.boot</groupId>
                    <artifactId>spring-boot-dependencies</artifactId>
                    <version>2.1.4.RELEASE</version>
                    <type>pom</type>
                    <scope>import</scope>
                </dependency>
            <!-- 数据库               -->
                <dependency>
                    <groupId>mysql</groupId>
                    <artifactId>mysql-connector-java</artifactId>
                    <version>5.1.47</version>
                </dependency>
            <!--druid                -->
                <dependency>
                    <groupId>com.alibaba</groupId>
                    <artifactId>druid</artifactId>
                    <version>1.1.10</version>
                </dependency>
            <!--mybatis                 -->
                <dependency>
                    <groupId>org.mybatis.spring.boot</groupId>
                    <artifactId>mybatis-spring-boot-starter</artifactId>
                    <version>1.3.2</version>
                </dependency>
<!--         logback-core    日志核心包 日志和测试  -->
                <dependency>
                    <groupId>ch.qos.logback</groupId>
                    <artifactId>logback-core</artifactId>
                    <version>1.2.3</version>
                </dependency>
                <!-- junit           -->
                <dependency>
                    <groupId>junit</groupId>
                    <artifactId>junit</artifactId>
                    <version>${junit.version}</version>
                </dependency>
                <!--lombok                -->
                <dependency>
                    <groupId>org.projectlombok</groupId>
                    <artifactId>lombok</artifactId>
                    <version>${lombok.version}</version>
                </dependency>
                <!--    log4j            -->
                <dependency>
                    <groupId>log4j</groupId>
                    <artifactId>log4j</artifactId>
                    <version>${log4j.version}</version>
                </dependency>


            </dependencies>

    </dependencyManagement>


</project>

创建数据库

 

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

 springcloud-api 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>springcloud</artifactId>
        <groupId>com.kuang</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>springcloud-api</artifactId>

    <properties>
        <maven.compiler.source>8</maven.compiler.source>
        <maven.compiler.target>8</maven.compiler.target>
    </properties>

<!-- 当前的Moudle 自己需要的依赖，如果父依赖中已经配置了版本，这里就不用写了    -->
    <dependencies>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
        </dependency>
    </dependencies>
</project>

实体类

package com.kuang.springcloud.pojo;

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

import java.io.Serializable;
@NoArgsConstructor
@Accessors(chain = true)//链式写法
@Data
//实现序列化  实体类  ORM映射  mysql--dept
public class Dept implements Serializable {

    private Long deptno;//主键
    private String dname;
    //这个数据库存在哪个数据库字段。~微服务，一个服务对应一个数据库，同一个信息可能存在不同的数据库
    private String db_source;

    public Dept(String dname) {
        this.dname = dname;
    }

    /**
     * 链式写法：
     *Dept dept = new Dept();
     * dept.setDeptNo(11).setDbane('sss').setDb_source("001");
     */



}

springcloud-provider-dept-8001 第二个子模块

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>springcloud</artifactId>
        <groupId>com.kuang</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>springcloud-provider-dept-8001</artifactId>

    <properties>
        <maven.compiler.source>8</maven.compiler.source>
        <maven.compiler.target>8</maven.compiler.target>
    </properties>

    <dependencies>
<!--    我们需要拿到实体类 ,所以要配置api Model   -->
        <dependency>
            <groupId>com.kuang</groupId>
            <artifactId>springcloud-api</artifactId>
            <version>1.0-SNAPSHOT</version>
        </dependency>

<!--   junit     -->
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
        </dependency>

<!--     Mysql   -->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
        </dependency>
        <!--     druid   -->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
        </dependency>
        <!-- logback - core -->
        <dependency>
            <groupId>ch.qos.logback</groupId>
            <artifactId>logback-core</artifactId>
        </dependency>
        <!--    mybatis -springboot   -->
        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
        </dependency>
        <!--   test     -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-test</artifactId>
        </dependency>
<!--    springboot-web    -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <!--  jetty  服务器    -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-jetty</artifactId>
        </dependency>
        <!--     热部署   -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
        </dependency>


    </dependencies>
</project>

YML

server:
  port: 8001
#mybatis配置
mybatis:
  type-aliases-package: com.kuang.springcloud.pojo
  config-location: classpath:mybatis/mybatis-config.xml
  mapper-locations: classpath:mybatis/mapper/*.xml
#  configuration: 这个配置驼峰命名转化为键值映射
#    map-underscore-to-camel-case: true

#spring配置
spring:
  application:
    name: springcloud-provider-dept
  datasource:
    type: com.alibaba.druid.pool.DruidDataSource #数据源
    driver-class-name: org.gjt.mm.mysql.Driver
    url: jdbc:mysql://localhost:3306/db01?useUnicode=true&characterEncoding=utf-8&useSSL=false
    username: root
    password: 2001

mapper

package com.kuang.springcloud.dao;

import com.kuang.springcloud.pojo.Dept;
import org.apache.ibatis.annotations.Mapper;

import java.util.List;

@Mapper
public interface DeptMapper {

    int addDept(Dept dept);

    Dept queryDeptById(Long id);

    List<Dept> queryAll();


}

mapper.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper
        PUBLIC "-//mybatis.org//DTD mapper 3.0//EN"
        "https://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.kuang.springcloud.dao.DeptMapper">

<delete id="addDept" parameterType="Dept">
   inner join dept(dname,db_source)
    values (#{dname},DATABASE())

    </delete>

<select id="queryDeptById" resultType="com.kuang.springcloud.pojo.Dept">
  select * from  dept where deptno =#{id}

    </select>

<select id="queryAll" resultType="com.kuang.springcloud.pojo.Dept">
    select * from  dept
    </select>
</mapper>

mybatis-config.xml

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


</configuration>

Service

package com.kuang.springcloud.service;

import com.kuang.springcloud.pojo.Dept;

import java.util.List;

public interface DeptService {

    int addDept(Dept dept);

    Dept queryDeptById(Long id);

    List<Dept> queryAll();

}

ServiceImpl

package com.kuang.springcloud.service.impl;

import com.kuang.springcloud.dao.DeptMapper;
import com.kuang.springcloud.pojo.Dept;
import com.kuang.springcloud.service.DeptService;
import lombok.experimental.Accessors;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.List;
@Service
public class DeptServiceImpl implements DeptService {

    @Autowired
  private DeptMapper deptMapper;

    @Override
    public int addDept(Dept dept) {
        return deptMapper.addDept(dept);
    }

    @Override
    public Dept queryDeptById(Long id) {
        return deptMapper.queryDeptById(id);
    }

    @Override
    public List<Dept> queryAll() {
        return deptMapper.queryAll();
    }
}

Controller

package com.kuang.springcloud.controller;

import com.kuang.springcloud.pojo.Dept;
import com.kuang.springcloud.service.DeptService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;

import java.util.List;

//提供Restful服务
@RestController
public class DeptController {

    @Autowired
    private DeptService deptService;

    @PostMapping("/dept/add")
    public String addDept(Dept dept){
        int i = deptService.addDept(dept);
        if (i>0){
            return "添加成功";
        }
        return "添加失败";
    }

    @GetMapping("/dept/get/{id}")
    public Dept getDept(@PathVariable("id")Long id){
        Dept dept = deptService.queryDeptById(id);
        return dept;
    }
    @GetMapping("/dept/list")
    public List<Dept> getAll(){
        return deptService.queryAll();
    }


}

主启动类

package com.kuang.springcloud;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

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