JavaEE進階知識學習-----SpringCloud(二)實踐準備

讀書遛狗遠方發表於2018-05-06

SpringCloud實踐準備

專案技術版本

SpringCloud版本:Dalston.SR1,SpringBoot版本:1.5.9

專案說明

專案是使用SpringCloud將四個工程進行整合,microservicecloud整體父工程Project,microservicecloud-api公共子模組Module,microservicecloud-provider-dept-8001部門微服務提供者Module,microservicecloud-consumer-dept-80部門微服務消費者Module。

1.父類專案建立

在邏輯檢視中選擇new-Maven Project-勾上建立簡單專案-選擇pom方式

pom.xml檔案

<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.luo.springcloud</groupId>
	<artifactId>microservicecloud</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>


複製程式碼

2.公共元件專案建立

在父專案上建立microservicecloud-api專案,注意是在microservicecloud上new一個maven module,packaging選擇jar

POM.xml檔案

<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.luo.springcloud</groupId>
    <artifactId>microservicecloud</artifactId>
    <version>0.0.1-SNAPSHOT</version>
  </parent>
  <artifactId>microservicecloud-api</artifactId>
  <dependencies><!-- 當前Module需要用到的jar包,按自己需求新增,如果父類已經包含了,可以不用寫版本號 -->
		<dependency>
			<groupId>org.projectlombok</groupId>
			<artifactId>lombok</artifactId>
		</dependency>
		<dependency>
			<groupId>org.springframework.cloud</groupId>
			<artifactId>spring-cloud-starter-feign</artifactId>
		</dependency>
	</dependencies>
</project>
複製程式碼

Dept實體類

public class Dept implements Serializable{
	private Long deptno; // 主鍵
	private String dname; // 部門名稱、
	private String db_source; // 來自那個資料庫,因為微服務可以一個服務對應一個資料庫,同一個資訊被儲存到不同的資料庫
	
	public Dept() {
		super();
	}
	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;
	}
	@Override
	public String toString() {
		return "Dept [deptno=" + deptno + ", dname=" + dname + ", db_source=" + db_source + "]";
	}
複製程式碼

當我們每次都需要建立一個實體類的getter,setter,toString和構造器等方法時,如果增加一個欄位就要重新生成方法,為了簡化這種重複的操作,我們在前面的pom中引入了lombok,同樣的實體類,使用方法如下

@SuppressWarnings("serial")
@AllArgsConstructor
@NoArgsConstructor
@Data
@Accessors(chain=true)
public class Dept implements Serializable{
	private Long deptno; // 主鍵
	private String dname; // 部門名稱
    // 來自那個資料庫,因為微服務可以一個服務對應一個資料庫,同一個資訊被儲存到不同的資料庫
	private String db_source; 
}
複製程式碼

lombok安裝方法

拷貝lombok-1.16.18.jar到Eclipse目錄下,執行java -jar D:\javasoft\eclipse-jee-neon-3-win32-x86_64\eclipse\ombok-1.16.18.jar,然後,彈框中選擇Eclipse安裝目錄,選擇install即可。

lombok註解使用

@Data :註解在類上;提供類所有屬性的 getting 和 setting 方法,此外還提供了equals、canEqual
@Setter:註解在屬性上;為屬性提供 setting 方法
@Getter:註解在屬性上;為屬性提供 getting 方法
@Log4j :註解在類上;為類提供一個 屬性名為log 的 log4j 日誌物件
@NoArgsConstructor:註解在類上;為類提供一個無參的構造方法
@AllArgsConstructor:註解在類上;為類提供一個全參的構造方法
@Accessors(chain=true):可以使用鏈式寫法
複製程式碼

lombok測試

@SuppressWarnings("serial")
@AllArgsConstructor
@NoArgsConstructor
@Data
@Accessors(chain=true)
public class Dept implements Serializable{
	
	private Long deptno; // 主鍵
	private String dname; // 部門名稱、
	private String db_source; // 來自那個資料庫,因為微服務可以一個服務對應一個資料庫,同一個資訊被儲存到不同的資料庫
	public static void main(String[] args) {
		Dept dept = new Dept();
		dept.setDeptno(12L).setDname("開發部").setDb_source("DB01");
	}
}
複製程式碼

注意內容

實體類必須實現Serializable介面

打包使用

公共元件模組寫好後可以點選run as 選擇maven clean ,然後在選擇maven install。其他模組引用的方法如下

<groupId>com.atguigu.springcloud</groupId>
<artifactId>microservicecloud-api</artifactId>
<version>0.0.1-SNAPSHOT</version>
複製程式碼

3.部門微服務提供者

首先現在父類專案上new一個maven module,microservicecloud-provider-dept-8001修改pom.xml檔案

pom.xml檔案

<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.luo.springcloud</groupId>
		<artifactId>microservicecloud</artifactId>
		<version>0.0.1-SNAPSHOT</version>
	</parent>

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

	<dependencies>
		<!-- 引入自己定義的api通用包,可以使用Dept部門Entity -->
		<dependency>
			<groupId>com.luo.springcloud</groupId>
			<artifactId>microservicecloud-api</artifactId>
			<version>${project.version}</version>
		</dependency>
		<!-- actuator監控資訊完善 -->
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-actuator</artifactId>
		</dependency>
		<!-- 將微服務provider側註冊進eureka -->
		<dependency>
			<groupId>org.springframework.cloud</groupId>
			<artifactId>spring-cloud-starter-eureka</artifactId>
		</dependency>
		<dependency>
			<groupId>org.springframework.cloud</groupId>
			<artifactId>spring-cloud-starter-config</artifactId>
		</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>
		<!-- 修改後立即生效,熱部署 -->
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>springloaded</artifactId>
		</dependency>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-devtools</artifactId>
		</dependency>
	</dependencies>

</project>
複製程式碼

application.yml檔案

server:
  port: 8001
  
mybatis:
  config-location: classpath:mybatis/mybatis.cfg.xml        # mybatis配置檔案所在路徑
  type-aliases-package: com.luo.springcloud.entities        # 所有Entity別名類所在包
  mapper-locations:
  - classpath:mybatis/mapper/**/*.xml                       # mapper對映檔案
    
spring:
   application:
    name: microservicecloud-dept 
   datasource:
    type: com.alibaba.druid.pool.DruidDataSource            # 當前資料來源操作型別
    driver-class-name: org.gjt.mm.mysql.Driver              # mysql驅動包
    url: jdbc:mysql://localhost:3306/cloudDB01              # 資料庫名稱
    username: root
    password: 1234
    dbcp2:
      min-idle: 5                                           # 資料庫連線池的最小維持連線數
      initial-size: 5                                       # 初始化連線數
      max-total: 5                                          # 最大連線數
      max-wait-millis: 200                                  # 等待連線獲取的最大超時時間
      
eureka:
  client: #客戶端註冊進eureka服務列表內
    service-url: 
      defaultZone: http://localhost:7001/eureka
複製程式碼

mybatis下mybatis.cfg.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>
		<setting name="cacheEnabled" value="true" /><!-- 二級快取開啟 -->
	</settings>
</configuration>
複製程式碼

SQL語句

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('開發部',DATABASE());
INSERT INTO dept(dname,db_source) VALUES('人事部',DATABASE());
INSERT INTO dept(dname,db_source) VALUES('財務部',DATABASE());
INSERT INTO dept(dname,db_source) VALUES('市場部',DATABASE());
INSERT INTO dept(dname,db_source) VALUES('運維部',DATABASE());
複製程式碼

dao介面

@Mapper
public interface DeptDao {
	
	public boolean addDept(Dept dept);
	public Dept findById(Long id);
	public List<Dept> findAll();

}
複製程式碼

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.luo.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>
複製程式碼

DeptService

public interface DeptService {
	public boolean add(Dept dept);
	public Dept get(Long id);
	public List<Dept> list();
}
複製程式碼

DeptServiceImpl

@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();
	}
}
複製程式碼

DeptController

@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();
	}
}
複製程式碼

建立主啟動類DeptProvider8001_App

@SpringBootApplication
public class DeptProvider8001_App {
	public static void main(String[] args) {
		SpringApplication.run(DeptProvider8001_App.class, args);
	}
}
複製程式碼

測試結果

輸入http://localhost:8001/dept/list以JSON的方式返回資料

4.部門微服務消費者

首先現在父類專案上new一個maven module,microservicecloud-consumer-dept-80修改pom.xml檔案

POM.xml檔案

<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.luo.springcloud</groupId>
		<artifactId>microservicecloud</artifactId>
		<version>0.0.1-SNAPSHOT</version>
	</parent>

	<artifactId>microservicecloud-consumer-dept-80</artifactId>
	<description>部門微服務消費者</description>

	<dependencies>
		<dependency><!-- 自己定義的api -->
			<groupId>com.luo.springcloud</groupId>
			<artifactId>microservicecloud-api</artifactId>
			<version>${project.version}</version>
		</dependency>
		<!-- Ribbon相關 -->
		<dependency>
			<groupId>org.springframework.cloud</groupId>
			<artifactId>spring-cloud-starter-eureka</artifactId>
		</dependency>
		<dependency>
			<groupId>org.springframework.cloud</groupId>
			<artifactId>spring-cloud-starter-ribbon</artifactId>
		</dependency>
		<dependency>
			<groupId>org.springframework.cloud</groupId>
			<artifactId>spring-cloud-starter-config</artifactId>
		</dependency>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-web</artifactId>
		</dependency>
		<!-- 修改後立即生效,熱部署 -->
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>springloaded</artifactId>
		</dependency>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-devtools</artifactId>
		</dependency>
	</dependencies>
</project>
複製程式碼

application.yml檔案

server:
  port: 80
複製程式碼

ConfigBean註解類

@Configuration
public class ConfigBean {
    @Bean
	public RestTemplate geRestTemplate(){
		return new RestTemplate();
	}
}
複製程式碼

RestTemplate

RestTemplate提供了多種便捷訪問遠端Http服務的方法,是一種簡單高效便捷的訪問restful服務模板類,是Spring提供的用於訪問Rest服務的客戶端模板工具類集,使用方法如下

(url,requestMap,ResponseBean.class)三個引數分別代表Rest請求地址,請求引數,HTTP響應轉換被轉換的物件型別

DeptController_Consumer

@RestController
public class DeptController_Consumer {
	private static final String REST_URL_PREFIX = "http://localhost:8001";
	@Autowired
	private RestTemplate restTemplate;
	
	@RequestMapping(value="/consumer/dept/add")
	public boolean add(Dept dept){
		return restTemplate.postForObject(REST_URL_PREFIX+"/dept/add", dept, Boolean.class);
	}
	
	@RequestMapping(value="/consumer/dept/get/{id}")
	public Dept get(@PathVariable("id") Long id){
		return restTemplate.getForObject(REST_URL_PREFIX+"/dept/get/"+id, Dept.class);
	}
	
	@RequestMapping(value="/consumer/dept/list")
	public Dept list(){
		return restTemplate.getForObject(REST_URL_PREFIX+"/dept/list/", Dept.class);
	}
}
複製程式碼

DeptConsumer80_App主類

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

測試結果

http://localhost/consumer/dept/list

http://localhost/consumer/dept/get/2

http://localhost/consumer/dept/add?dname=AI

相關文章