一个简单的Maven模块结构是这样的:
---- app-parent 一个父项目(app-parent)聚合很多子项目(app-util,app-dao,app-service,app-web)
|---- pom.xml (pom)
|
|-------- app-util
| |-------- pom.xml (jar)
|
|-------- app-dao
| |-------- pom.xml (jar)
|
|-------- app-service
| |-------- pom.xml (jar)
|
|-------- app-web
|-------- pom.xml (war)
JDK 1.8/Eclipse/Spring Boot 1.5.9.RELEASE/Spring Cloud Dalston.SR1
打开Eclipse,新建Maven 项目 springcloudDemo
注意:
pom
打开父项目:观察结构
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>
<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>
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。
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:
下面看一下 springcloudDemo-api 项目结构:
<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>
server:
port: 8001
mybatis:
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: root
password: root
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
<?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>
<setting name="cacheEnabled" value="true"/><!-- 二级缓存开启 -->
</settings>
</configuration>
<?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>
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();
}
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();
}
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
{
@Autowired
private DeptDao dao ;
@Override
public boolean add(Dept dept)
{
return dao.addDept(dept);
}
@Override
public Dept get(Long id)
{
return dao.findById(id);
}
@Override
public List<Dept> list()
{
return dao.findAll();
}
}
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
{
@Autowired
private 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();
}
}
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;
启动启动类
这样我们的 Eclipse 分包构建项目就完成了,且完成了 SpringCloud 服务端的程序,由于篇幅有限,所以客户端的放在下一个篇中。
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原文链接 : https://blog.csdn.net/qq_43842093/article/details/121940874
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