（超详细）SSM+SpringBoot+SpringCloud--Rest微服务简单案例（学习springcloud之前可以参考）
学习springcloud之前可以参考本文回顾基础知识，需要有Maven+springmvc+mybatis+mysql基础
1.Maven的分包分模块架构
一个Project带着多个Module子模块
ServiceCloud父工程（Project）管理依赖
包含3个子模块（Module）
cloud-api：封装的整体Entity/接口/公共配置等
cloud-provider-dept-8001：微服务落地的服务提供者
cloud-consumer-dept-80：微服务调用的客户端使用
2.创建servicecloud父工程
idea创建一个maven项目，创建好后之后一个src文件和一个pom.xml文件
pom文件内容如下：
<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.shawn</groupId>
<artifactId>service-cloud</artifactId>
<version>1.0-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>
<!--父工程依赖管理-->
<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>
<build>
<finalName>service-cloud</finalName>
<resources>
<resource>
<directory>src/main/resources</directory>
<filtering>true</filtering>
</resource>
</resources>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-resources-plugin</artifactId>
<configuration>
<delimiters>
<delimit>$</delimit>
</delimiters>
</configuration>
</plugin>
</plugins>
</build>
<!--以下是和其他模块依赖，报错可以先注释掉-->
<modules>
<module>cloud-api</module>
<module>cloud-provider-dept-8001</module>
<module>cloud-consume-dept-80</module>
</modules>
</project>
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servicecloud父工程主要是定义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
3.创建cloud-api 封装的整体Entity/接口/公共配置等
直接在父工程上点击右键创建新的Module
next下一步 再Finish
目录结构:
修改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>service-cloud</artifactId>
<groupId>com.shawn</groupId>
<version>1.0-SNAPSHOT</version>
</parent>
<modelVersion>4.0.0</modelVersion>
<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>
<artifactId>cloud-api</artifactId>
</project>
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lombok
在项目中使用Lombok可以减少很多重复代码。比如说getter/setter/toString等方法的编写。
插件安装方法：打开IDEA的Setting –> 选择Plugins选项 –> 选择Browse repositories –> 搜索lombok –> 点击安装 –> 安装完成重启IDEA
如果安装不了可以选择去官网下载jar包，然后本地安装。
配合lombok创建部门Entity：
package com.shawn.springcloud.entites;
import java.io.Serializable;
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
import lombok.experimental.Accessors;
@NoArgsConstructor //无参构造
@AllArgsConstructor//全餐构造
@Data//get/set方法
@Accessors(chain=true)//链式调用
public class Dept implements Serializable// entity --orm--- db_table
{
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;
}
}
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4.创建cloud-provider-dept-8001 服务提供者
参照cloud-api创建cloud-provider-dept-8001工程
修改pom.xml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>
<artifactId>service-cloud</artifactId>
<groupId>com.shawn</groupId>
<version>1.0-SNAPSHOT</version>
</parent>
<artifactId>cloud-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.shawn</groupId>
<artifactId>cloud-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>
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新建yml文件，并配置信息
server:
port: 8001
mybatis:
config-location: classpath:mybatis/mybatis.cfg.xml # mybatis配置文件所在路径
type-aliases-package: com.shawn.springcloud.entites # 所有Entity别名类所在包
mapper-locations:
- classpath:mybatis/mapper/**/*.xml # mapper映射文件
spring:
application:
name: cloud-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/clouddb01 # 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
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工程src/main/resources目录下新建mybatis文件夹后新建mybatis.cfg.xml文件
<?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>
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MySQL创建部门数据库脚本
新建数据库直接执行就可以了
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;
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DeptDao部门接口
@Mapper
public interface DeptDao
{
public boolean addDept(Dept dept);
public Dept findById(Long id);
public List<Dept> findAll();
}
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工程src/main/resources/mybatis目录下新建mapper文件夹后再建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.shawn.springcloud.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>
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DeptService部门服务接口
public interface DeptService
{
public boolean add(Dept dept);
public Dept get(Long id);
public List<Dept> list();
}
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DeptServiceImpl部门服务接口实现类
@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();
}
}
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DeptController部门微服务提供者REST
@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();
}
}
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DeptProvider8001_App主启动类DeptProvider8001_App
@SpringBootApplication
public class DeptProvider8001_App {
public static void main(String[] args) {
SpringApplication.run(DeptProvider8001_App.class,args);
}
}
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构建完成，打开浏览器测试
http://localhost:8001/dept/get/2
http://localhost:8001/dept/list
补充一下项目结构：
5.创建cloud-consumer-dept-80 消费者
参照上文创建出maven工程cloud-consumer-dept-80
修改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>service-cloud</artifactId>
<groupId>com.shawn</groupId>
<version>1.0-SNAPSHOT</version>
</parent>
<modelVersion>4.0.0</modelVersion>
<dependencies>
<dependency><!-- 引入自己定义的api通用包，可以使用Dept部门Entity -->
<groupId>com.shawn</groupId>
<artifactId>cloud-api</artifactId>
<version>${project.version}</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
</dependency>
<dependency>
<groupId>ch.qos.logback</groupId>
<artifactId>logback-core</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>
<artifactId>cloud-consume-dept-80</artifactId>
</project>
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新增yml文件application.yml
server:
port: 80
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编写配置文件configbean(类似spring里面的applicationContext.xml写入的注入Bean)
package com.shawn.springcloud.cfgbeans;
@Configuration
public class ConfigBean {
@Bean
public RestTemplate restTemplate(){
return new RestTemplate();
}
}
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新建DeptController_Consumer部门微服务消费者REST
package com.shawn.springcloud.controller;
@RestController
public class DeptController_Consumer {
private static final String REST_URL_PREFIX = "http://localhost:8001";
@Autowired
private RestTemplate restTemplate;
@RequestMapping("/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);
}
}
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注：RestTemplate提供了多种便捷访问远程Http服务的方法，是一种简单便捷的访问restful服务模板类，是Spring提供的用于访问Rest服务的客户端模板工具集
使用：
restTemplate访问restful接口非常的简单粗暴无脑。(url, requestMap, ResponseBean.class)这三个参数分别代表
REST请求地址、请求参数、HTTP响应转换被转换成的对象类型。
最后主启动类编写
package com.shawn.springcloud;
@SpringBootApplication
public class DeptConsumer80_App
{
public static void main(String[] args)
{
SpringApplication.run(DeptConsumer80_App.class, args);
}
}
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6. 编写完成，最后进行测试
访问消费者接口（注意，是访问消费者的！80端口）
http://localhost/consumer/dept/get/2
http://localhost/consumer/dept/list
END
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版权声明：本文为CSDN博主「LuckyShawn」的原创文章，遵循CC 4.0 BY-SA版权协议，转载请附上原文出处链接及本声明。
原文链接：https://blog.csdn.net/weixin_40037053/article/details/85051405