【springcloud】Eureka-server-provider 服务提供者项目创建

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一、首先创建一个Dept项目

1. pom 中添加一个 lombok

<dependency>
    <groupId>org.projectlombok</groupId>
    <artifactId>lombok</artifactId>
    <version>1.16.18</version>
</dependency>

2.创建 dept 的 pojo 类

@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;
    }
}

3. 注意创建空项目，然后再添加 module

以后都从这里添加 module 来添加其他微服务项目。

二、创建服务提供者项目

1. SQL 文件

DROP TABLE IF EXISTS `dept`;
CREATE TABLE `dept` (
  `deptno` bigint(20) NOT NULL AUTO_INCREMENT,
  `dname` varchar(60) DEFAULT NULL,
  `db_source` varchar(60) DEFAULT NULL,
  PRIMARY KEY (`deptno`)
) ENGINE=InnoDB AUTO_INCREMENT=7 DEFAULT CHARSET=utf8mb4;

-- ----------------------------
-- Records of dept ------------
-- ----------------------------
INSERT INTO `dept` VALUES ('1', '开发部', 'clouddb01');
INSERT INTO `dept` VALUES ('2', '人事部', 'clouddb01');
INSERT INTO `dept` VALUES ('3', '财务部', 'clouddb01');
INSERT INTO `dept` VALUES ('4', '市场部', 'clouddb01');
INSERT INTO `dept` VALUES ('5', '产品部', 'clouddb01');
INSERT INTO `dept` VALUES ('6', '运维部', 'clouddb01');

2. pom.xml

注意添加 dep t的依赖。貌似只有添加了库 (repositories 标签) 才不用写版本号，不然找不到相关的依赖。

	<properties>
		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
		<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
		<java.version>1.8</java.version>
		<junit.version>4.12</junit.version>
		<spring-cloud.version>Finchley.RELEASE</spring-cloud.version>
	</properties>

	<!-- lookup parent from repository -->
	<parent>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-parent</artifactId>
		<version>2.1.2.RELEASE</version>
		<relativePath/> <!-- lookup parent from repository -->
	</parent>

	<dependencies>
		<!--dept的pojo类-->
		<dependency>
			<groupId>com.hiteamtech</groupId>
			<artifactId>springcloud-api-dept</artifactId>
			<version>1.0-SNAPSHOT</version>
		</dependency>

		<!-- 将微服务provider侧注册进eureka -->
		<dependency>
			<groupId>org.springframework.cloud</groupId>
			<artifactId>spring-cloud-starter-netflix-eureka-server</artifactId>
		</dependency>
		<dependency>
			<groupId>org.springframework.cloud</groupId>
			<artifactId>spring-cloud-starter-config</artifactId>
		</dependency>

		<!-- 修改后立即生效，热部署 -->
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-devtools</artifactId>
		</dependency>

		<!--springBoot  SSM 相关-->
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter</artifactId>
		</dependency>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-test</artifactId>
			<scope>test</scope>
		</dependency>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-web</artifactId>
		</dependency>
		<!-- mybatis整合包-->
		<dependency>
			<groupId>org.mybatis.spring.boot</groupId>
			<artifactId>mybatis-spring-boot-starter</artifactId>
			<version>1.1.1</version>
		</dependency>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-jetty</artifactId>
		</dependency>

		<!--测试-->
		<dependency>
			<groupId>junit</groupId>
			<artifactId>junit</artifactId>
		</dependency>
		<!--mysql驱动-->
		<dependency>
			<groupId>mysql</groupId>
			<artifactId>mysql-connector-java</artifactId>
		</dependency>
		<!-- 数据库连接池-->
		<dependency>
			<groupId>com.alibaba</groupId>
			<artifactId>druid-spring-boot-starter</artifactId>
			<version>1.1.10</version>
		</dependency>

		<!--日志-->
		<dependency>
			<groupId>ch.qos.logback</groupId>
			<artifactId>logback-core</artifactId>
		</dependency>

		<!-- actuator监控信息完善 -->
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-actuator</artifactId>
		</dependency>

		<!-- 修改后立即生效，热部署 -->
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-devtools</artifactId>
		</dependency>

	</dependencies>

	<!--spring cloud的依赖-->
	<dependencyManagement>
		<dependencies>
			<dependency>
				<groupId>org.springframework.cloud</groupId>
				<artifactId>spring-cloud-dependencies</artifactId>
				<version>${spring-cloud.version}</version>
				<type>pom</type>
				<scope>import</scope>
			</dependency>
		</dependencies>
	</dependencyManagement>

	<repositories>
		<repository>
			<id>spring-milestones</id>
			<name>Spring Milestones</name>
			<url>https://repo.spring.io/milestone</url>
			<snapshots>
				<enabled>false</enabled>
			</snapshots>
		</repository>
	</repositories>

	<build>
		<finalName>${project.artifactId}</finalName>
		<resources>
			<resource>
				<directory>src/main/resources</directory>
				<filtering>true</filtering>
			</resource>
		</resources>
		<plugins>
			<plugin>
				<groupId>org.apache.maven.plugins</groupId>
				<artifactId>maven-resources-plugin</artifactId>
				<configuration>
					<delimiters>
						<delimit>$</delimit>
					</delimiters>
				</configuration>
			</plugin>

			<plugin>
				<groupId>org.springframework.boot</groupId>
				<artifactId>spring-boot-maven-plugin</artifactId>
			</plugin>
		</plugins>
	</build>

2. yml

server:
  port: 8001

mybatis:
  config-location: classpath:mybatis/mybatis.cfg.xml
  type-aliases-package: com.hiteamtech
  mapper-locations: classpath:mybatis/mapper/*.xml

spring:
   application:
    name: springcloud-dept  # 服务名，以后根据这个调用服务
   datasource:
    type: com.alibaba.druid.pool.DruidDataSource
    driver-class-name: com.mysql.jdbc.Driver
    url: jdbc:mysql://localhost:3306/clouddb01?useUnicode=true&useJDBCCompliantTimezoneShift=true&useLegacyDatetimeCode=false&serverTimezone=UTC
    username: root
    password: admin

eureka:
  client:
    service-url:
      defaultZone: http://www.eureka7001.com:7001/eureka/,http://www.eureka7002.com:7002/eureka/
  instance:
    instance-id: new-springcloud-dept-8001   # 修改主机名称（区别于服务名称）
    prefer-ip-address: true

info:
  app.name: myspringcloud
  company.name: www.hiteamtech.com
  build.artifactId: $project.artifactId$
  build.version: $project.version$

3. 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" /><!-- 二级缓存开启 -->
	</settings>

</configuration>

4. 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.hiteamtech.springcloudprovider8001.mapper.IDeptMapper">

    <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>

5. controller

@RestController
@RequestMapping("/dept")
public class DeptController {

    @Autowired
    private IDeptService deptService;
    @Autowired
    private DiscoveryClient discoveryClient;

    @PostMapping("/add")
    public boolean add(@RequestBody Dept dept){
        return deptService.addDept(dept);
    }

    @GetMapping("/get/{id}")
    public Dept getDept(@PathVariable("id") Long id){
        return deptService.findById(id);
    }

    @GetMapping("/list")
    public List<Dept> list(){
        return deptService.findAll();
    }

6. service

@Service
public class DeptServiceImpl implements IDeptService{

    @Autowired
    private IDeptMapper deptMapper;

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

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

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


}

7. mapper

@Mapper
@Repository
public interface IDeptMapper {
    boolean addDept(Dept dept);

    Dept findById(Long id);

    List<Dept> findAll();
}

8. 启动类

@SpringBootApplication
@EnableEurekaClient // 注册服务
@EnableDiscoveryClient // 暴露服务用
public class SpringcloudProvider8001Application {

	public static void main(String[] args) {
		SpringApplication.run(SpringcloudProvider8001Application.class, args);
	}

}

9.启动测试

1. 启动服务端 Eureka Server
2. 访问 http://localhost:7001
3. 成功在页面上发现了服务列表
4. 访问服务提供项目的controller，能够查出相应数据

十、修改部分服务显示信息

1. 修改主机名称

eureka:
  client:                                     
    service-url: 
      defaultZone: http://localhost:7001/eureka
  instance:                                     # <-- 修改在此
    instance-id: springcloud-dept-8001     # <--修改在此

2. 鼠标悬停显示ip/port

eureka:
  client:                                     #客户端注册进eureka服务列表内
    service-url: 
      defaultZone: http://localhost:7001/eureka
  instance:
    instance-id: microservicecloud-dept8001   #自定义服务名称信息
    prefer-ip-address: true                   #访问路径可以显示IP地址  <--这里新修改

3. 修改点击服务名进去error(有待解决)

1. 添加pom中的依赖

   <!-- actuator监控信息完善 -->
   <dependency>
     <groupId>org.springframework.boot</groupId>
     <artifactId>spring-boot-starter-actuator</artifactId>
   </dependency> 
   
   <build>
   	<finalName>springcloud-provider-8001</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>

2. yml中添加信息说明(有问题)

info:
  app.name: springcloud-dept
  company.name: www.hiteamtech.com
  build.artifactId: ${project.artifactId}$
  build.version: ${project.version}$