springcloud01- SpringCloud快速搭建
阿新 • • 發佈：2020-07-19
SpringCloud快速搭建
1.匯入父依賴（maven工程）
<!--打包方式--> <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> <lombok.version>1.16.10</lombok.version> </properties> <dependencyManagement> <dependencies> <!-- https://mvnrepository.com/artifact/org.springframework.cloud/spring-cloud-dependencies --> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-dependencies</artifactId> <version>Greenwich.SR1</version> <type>pom</type> <scope>import</scope> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-dependencies</artifactId> <version>2.1.4.RELEASE</version> <type>pom</type> <scope>import</scope> </dependency> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>5.1.47</version> </dependency> <dependency> <groupId>com.alibaba</groupId> <artifactId>druid</artifactId> <version>1.1.10</version> </dependency> <dependency> <groupId>org.mybatis.spring.boot</groupId> <artifactId>mybatis-spring-boot-starter</artifactId> <version>1.3.2</version> </dependency> <!--日誌、測試--> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>${junit.version}</version> </dependency> <dependency> <groupId>org.projectlombok</groupId> <artifactId>lombok</artifactId> <version>${lombok.version}</version> </dependency> <dependency> <groupId>log4j</groupId> <artifactId>log4j</artifactId> <version>1.2.17</version> </dependency> <dependency> <groupId>ch.qos.logback</groupId> <artifactId>logback-core</artifactId> <version>1.2.3</version> </dependency> </dependencies> </dependencyManagement>
1.搭建子工程（API 專門是實體類的工程）
1）匯入子工程需要的依賴
<dependencies>
<!--當前Module自己需要的依賴，如果父依賴中已經配置了版本，這裡就不用寫了-->
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
</dependency>
</dependencies>
2）建立資料，建立表
3）建立實體類（所有的實體類實現序列化）
package com.mjh.springcloud.pojo; import lombok.Data; import lombok.NoArgsConstructor; import lombok.experimental.Accessors; import java.io.Serializable; @Data @NoArgsConstructor @Accessors(chain = true)//鏈式寫法 public class Dept implements Serializable { private Long deptNo;//bigint 用Long private String dName; private String db_source;//這個資料是存在於那個資料庫的欄位 微服務 一個服務對應一個數據庫 public Dept(String dName) { this.dName = dName; } /** * 鏈式寫法 * Dept dept=new Dept(); * dept.setName("11").setId(4).setAge(7) */ }
2.搭建服務提供者工程
1）匯入子工程需要的依賴
<dependencies>
<!--我們需要拿到實體類，所以要配置api module-->
<dependency>
<groupId>org.example</groupId>
<artifactId>springcloud-api</artifactId>
<version>1.0-SNAPSHOT</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>log4j</groupId>
<artifactId>log4j</artifactId>
</dependency>
<dependency>
<groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId>
</dependency>
<!--test-->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-test</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<!--jetty-->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-jetty</artifactId>
</dependency>
<!--熱部署-->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
</dependency>
</dependencies>
2）編寫配置檔案
server:
port: 8001
#mybatis檔案
mybatis:
type-aliases-package: com.mjh.springcloud.pojo
config-location: classpath:mybatis/mybatis-config.xml
mapper-locations: classpath:mybatis/mapper/*.xml
#Spring配置
spring:
application:
name: springcloud-privider-dept
datasource:
type: com.alibaba.druid.pool.DruidDataSource
driver-class-name: org.gjt.mm.mysql.Driver
url: jdbc:mysql://localhost:3306/db01?useUnicode=true&characterEncoding=utf-8
username: root
password: 123456
3）編寫mybatis配置檔案（可以省略）
<?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>
<!-- 是否開啟快取 ， 配置全域性性 cache 的 ( 開 / 關) default:true -->
<setting name="cacheEnabled" value="false"/>
</settings>
</configuration>
4）編寫Dao層介面
package com.mjh.springcloug.dao;
import org.apache.ibatis.annotations.Mapper;
import org.springframework.stereotype.Repository;
import java.util.List;
@Mapper
@Repository
public interface Dept {
public boolean addDept(Dept dept);
public Dept queryById(Long id);
public List<Dept> queryAll();
}
5）編寫對應的mapper檔案
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper
PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.mjh.springcloug.dao.DeptDao">
<insert id="addDept" parameterType="Dept">
insert into dept values (#{dName},DATABASE());
</insert>
<select id="queryById" resultType="Dept" parameterType="Long">
select * from dept where deptNo=#{deptNo};
</select>
<select id="queryAll" resultType="Dept">
select * from dept;
</select>
</mapper>
6）service層
package com.mjh.springcloug.service;
import com.mjh.springcloud.pojo.Dept;
import com.mjh.springcloug.dao.DeptDao;
import java.util.List;
public interface DeptService {
public boolean addDept(Dept dept);
public Dept queryById(Long id);
public List<Dept> queryAll();
}
package com.mjh.springcloug.service;
import com.mjh.springcloud.pojo.Dept;
import com.mjh.springcloug.dao.DeptDao;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.util.List;
@Service
public class DeptServiceImpl implements DeptService {
@Autowired
private DeptDao deptDao;
@Override
public boolean addDept(Dept dept) {
return deptDao.addDept(dept);
}
@Override
public Dept queryById(Long id) {
return deptDao.queryById(id);
}
@Override
public List<Dept> queryAll() {
return deptDao.queryAll();
}
}
7）controller層
package com.mjh.springcloug.controller;
import com.mjh.springcloud.pojo.Dept;
import com.mjh.springcloug.service.DeptService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RestController;
import java.util.List;
/**
* 提供restful風格，讓外界呼叫我們的方法
*/
@RestController
public class DeptController {
@Autowired
private DeptService deptService;
@PostMapping("/dept/add")
public boolean addDept(Dept dept){
return deptService.addDept(dept);
}
@GetMapping("/dept/queryById/{id}")
public Dept queryById(@PathVariable("id") Long id){
return deptService.queryById(id);
}
public List<Dept> queryAll(){
return deptService.queryAll();
}
}
8）主啟動類
package com.mjh.springcloug;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
//啟動類
@SpringBootApplication
public class DeptPrivider_8001 {
public static void main(String[] args) {
SpringApplication.run( DeptPrivider_8001.class,args);
}
}
3.搭建服務消費者（消費者不連資料庫）
1）匯入依賴
<!--實體類+web-->
<dependencies>
<!--我們需要拿到實體類，所以要配置api module-->
<dependency>
<groupId>org.example</groupId>
<artifactId>springcloud-api</artifactId>
<version>1.0-SNAPSHOT</version>
</dependency>
<dependency>
<groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId>
</dependency>
<!--熱部署-->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
</dependency>
</dependencies>
2）編寫pom.xml
server:
port: 80
3)消費者不應該有service層，所以我們要想辦法把提供者的URL去到，就要在spring的Bean裡注入RestTemplate,,,裡邊有很多請求
package com.mjh.springcloud.config;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.client.RestTemplate;
@Configuration //@Configuration 相當於spring裡面的 applicationContext.xml
public class ConfigBean {
@Bean
public RestTemplate getRestTemplate(){
return new RestTemplate();
}
}
4）controller層
package com.mjh.springcloud.controller;
import com.mjh.springcloud.pojo.Dept;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.client.RestTemplate;
import javax.xml.ws.RequestWrapper;
import java.util.List;
@Controller
public class DeptConsumerController {
//理解：消費者不應該有service層
//RestTemplate......供我們直接呼叫就可以了，註冊到spring中
//(url,實體：map,Class<T> responseType)
@Autowired
private RestTemplate restTemplate;
private static final String REST_URL_PERFIx="http://localhost:8001";
@RequestMapping("/consumer/dept/add")
public boolean add(Dept dept){
return restTemplate.postForObject(REST_URL_PERFIx+"/dept/add",dept,Boolean.class);
}
@RequestMapping("/consumer/dept/queryById/{id}")
public Dept queryById(@PathVariable("id") Long id){
//服務端給你什麼方法你就呼叫什麼方法
return restTemplate.getForObject(REST_URL_PERFIx+"/dept/queryById/"+id,Dept.class);
}
@RequestMapping("/consumer/dept/list")
public List<Dept> list(){
return restTemplate.getForObject(REST_URL_PERFIx+"/dept/queryAll",List.class);
}
}
5）主啟動類
package com.mjh.springcloud;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
public class DeptConsumer_80 {
public static void main(String[] args) {
SpringApplication.run(DeptConsumer_80.class,args);
}
}