Eclipse构建Maven分包分模块项目并构建服务端

首先说一下Maven 模块结构：

环境

JDK 1.8/Eclipse/Spring Boot 1.5.9.RELEASE/Spring Cloud Dalston.SR1

构建Maven 父项目

打开Eclipse，新建Maven 项目 springcloudDemo
父项目
注意：

由于笔记是学习完写的，所以在截图的时候完全按照自己搭建的项目名来写，出现项目名重复，所以这里直接马赛克。正常不会出现这种问题。
请选择 pom

打开父项目：观察结构
父项目结构
添加pom 依赖：

<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.mike.demo</groupId><artifactId>springcloudDemo</artifactId><version>0.0.1-SNAPSHOT</version><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><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><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>

基础模快共有三个

springcloudDemo-api 封装的整体entity/接口/公共配置等
springcloudDemo-provider-dept-8001 微服务落地的服务提供者
springcloudDemo-consumer-dept-80 微服务调用的客户端使用
下面分别就上面上个模块进行构建

pringcloudDemo-api 构建

鼠标右键点击父项目 springcloudDemo,新建 Maven Mondule ,点击下一步
输入模块名称：springcloudDemo-api
选择Jar 包，点击Finish
查看父项目此时的情况
pom 依赖

<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><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 --><groupId>com.mike.demo</groupId><artifactId>springcloudDemo</artifactId><version>0.0.1-SNAPSHOT</version></parent><artifactId>springcloudDemo-api</artifactId><!-- 当前Module我自己叫什么名字 --><dependencies><!-- 当前Module需要用到的jar包，按自己需求添加，如果父类已经包含了，可以不用写版本号 --><dependency><groupId>org.projectlombok</groupId><artifactId>lombok</artifactId></dependency></dependencies>
</project>

新建 Model Dept

package com.mike.demo.entities;import java.io.Serializable;import lombok.Data;
import lombok.NoArgsConstructor;
import lombok.experimental.Accessors;@SuppressWarnings("serial")
@NoArgsConstructor
@Data
@Accessors(chain=true)
public class Dept implements Serializable //必须序列化
{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同数据库public Dept(String dname){super();this.dname = dname;}public Dept(Long deptno, String dname, String db_source) {super();this.deptno = deptno;this.dname = dname;this.db_source = db_source;}public Long getDeptno() {return deptno;}public void setDeptno(Long deptno) {this.deptno = deptno;}public String getDname() {return dname;}public void setDname(String dname) {this.dname = dname;}public String getDb_source() {return db_source;}public void setDb_source(String db_source) {this.db_source = db_source;}
}

注意：可能大家认为使用了 lombok 为什么还需要写setter/getter 方法，但是在之后的组件整合的过程中，返回Dept Json 数据的时候无法正确返回所以加上了。
8. 点击pom 文件 run ： maven clean
9. clean 之后，maven install 将 api 打成jar包供之后的模块使用。
注意：在打包的过程中，可能出现 Perhaps you are running on a JRE rather than a JDK? 解决办法可以去搜一搜。

springcloudDemo-provider-dept-8001

如同上面新建 springcloudDemo-api 的步骤一样，新建项目。
建成后，父项目拥有：
在这里插入图片描述

下面看一下 springcloudDemo-api 项目结构：

pom 文件

<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><parent><groupId>com.mike.demo</groupId><artifactId>springcloudDemo</artifactId><version>0.0.1-SNAPSHOT</version></parent><artifactId>springcloudDemo-provider-dept-8001</artifactId><dependencies><dependency><!-- 引入自己定义的api通用包，可以使用Dept部门Entity --><groupId>com.mike.demo</groupId><artifactId>springcloudDemo-api</artifactId><version>${project.version}</version></dependency><dependency><groupId>junit</groupId><artifactId>junit</artifactId></dependency><dependency><groupId>mysql</groupId><artifactId>mysql-connector-java</artifactId></dependency><dependency><groupId>com.alibaba</groupId><artifactId>druid</artifactId></dependency><dependency><groupId>ch.qos.logback</groupId><artifactId>logback-core</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><!-- 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>

新建application.yml 文件

server:port: 8001mybatis:config-location: classpath:mybatis/mybatis.cfg.xml        # mybatis配置文件所在路径type-aliases-package: com.mike.demo.entities    # 所有Entity别名类所在包mapper-locations:- classpath:mybatis/mapper/**/*.xml                       # mapper映射文件spring:application:name: springcloudDemo-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://xxxxxxxxx:3306/cloudDB01              # 数据库名称username: rootpassword: rootdbcp2: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

mybaties.cfg.xml

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

DeptMapper.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.mike.demo.dao.DeptDao"><select id="findById" resultType="Dept" parameterType="Long">select deptno,dname,db_source from dept where deptno=#{deptno}; </select><select id="findAll" resultType="Dept">select deptno,dname,db_source from dept; </select><insert id="addDept" parameterType="Dept">INSERT INTO dept(dname,db_source) VALUES(#{dname},DATABASE());</insert></mapper>

DeptDao.java

package com.mike.demo.dao;import java.util.List;
import org.apache.ibatis.annotations.Mapper;
import com.mike.demo.entities.Dept;@Mapper
public interface DeptDao
{public boolean addDept(Dept dept);public Dept findById(Long id);public List<Dept> findAll();
}

DeptService.java

package com.mike.demo.service;import java.util.List;
import com.mike.demo.entities.Dept;
public interface DeptService {public boolean add(Dept dept);public Dept    get(Long id);public List<Dept> list();}

DeptServiceImpl.java

package com.mike.demo.service.impl;import java.util.List;import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;import com.mike.demo.dao.DeptDao;
import com.mike.demo.entities.Dept;
import com.mike.demo.service.DeptService;@Service
public class DeptServiceImpl implements DeptService
{@Autowiredprivate DeptDao dao ;@Overridepublic boolean add(Dept dept){return dao.addDept(dept);}@Overridepublic Dept get(Long id){return dao.findById(id);}@Overridepublic List<Dept> list(){return dao.findAll();}}

DeptController.java

package com.mike.demo.controller;import java.util.List;import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;import com.mike.demo.entities.Dept;
import com.mike.demo.service.DeptService;@RestController
public class DeptController
{@Autowiredprivate DeptService service;@RequestMapping(value="/dept/add",method=RequestMethod.POST)public boolean add(@RequestBody Dept dept){return service.add(dept);}@RequestMapping(value="/dept/get/{id}",method=RequestMethod.GET)public Dept get(@PathVariable("id") Long id){return service.get(id);}@RequestMapping(value="/dept/list",method=RequestMethod.GET)public List<Dept> list(){return service.list();}
}

服务启动类 DeptProvider8001_App

package com.mike.demo;import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;/*** 服务的提供者* @author asus**/
@SpringBootApplication
public class DeptProvider8001_App
{public static void main(String[] args){SpringApplication.run(DeptProvider8001_App.class, args);}
}

数据库文件, 根据上面application.yml 配置的数据库，到Mysql中建库建表

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;