前言
前两天在和粉丝聊天的时候，粉丝跟我说之前在面试的时候被问到SpringBoot这一块的常识被问的有点懵，和我问了不少这方面的货色。预先我想了想不如把这些货色分享进去吧，让更多的人看到，这样不论是对本人常识的一个晋升还是对面试的筹备都有益处。好了，满满的干货都在上面了！
1.创立maven我的项目父工程（不应用idea的spring Initializr）
不勾选任何模板，间接应用默认我的项目模板
删除src文件夹，创立这个我的项目的目标是为了作为父工程，无需src文件夹，只保留pom文件即可
编辑pom文件
设置父工程打包形式为pom，用于依赖治理
<packaging>pom</packaging>增加必要依赖
<dependencyManagement> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter</artifactId> <version>${spring-boot.version}</version> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <version>${spring-boot.version}</version> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> <version>${spring-boot.version}</version> </dependency> <!-- dubbo依赖 apache版 --> <dependency> <groupId>org.apache.dubbo</groupId> <artifactId>dubbo-spring-boot-starter</artifactId> <version>2.7.7</version> </dependency> <!-- dubbo所需其余依赖 应用alibaba的dubbo则不须要 --> <dependency> <groupId>org.apache.curator</groupId> <artifactId>curator-framework</artifactId> <version>4.0.1</version> </dependency> <!-- dubbo所需其余依赖 应用alibaba的dubbo则不须要 --> <dependency> <groupId>org.apache.curator</groupId> <artifactId>curator-recipes</artifactId> <version>2.8.0</version> </dependency> <!-- zookeeper依赖 --> <dependency> <groupId>com.101tec</groupId> <artifactId>zkclient</artifactId> <version>0.7</version> </dependency> </dependencies></dependencyManagement>2. 创立生产者
同第一步雷同，创立子模块，名为provider
删除src文件夹，该模块仍作为父工程应用
批改pom文件，继承父工程，并设置打包形式为pom
<parent> <groupId>online.hupeng.dubbo</groupId> <artifactId>base</artifactId> <version>1.0</version> </parent> <artifactId>provider</artifactId> <packaging>pom</packaging>创立子工程provider-api，
批改pom文件，继承父工程provider
这个工程为生产者和束缚者束缚api标准，生产者和消费者都需依赖此模块分割彼此
此模块中只写api和实体类，不写实现形式
<parent> <groupId>online.hupeng.dubbo</groupId> <artifactId>provider</artifactId> <version>1.0</version></parent><artifactId>provider-api</artifactId><version>1.0</version><!-- maven默认打包形式为jar包，此处可不必显示指定 --><packaging>jar</packaging>编写代码
实体类user
package online.hupeng.dubbo.provider.domain;import java.io.Serializable;/*当实体类作为RPC办法的返回值时，必须实现Serializable接口，dubbo的实现原理就是消费者近程调用生产者办法，生产者返回序列化后的返回值，消费者通过网络获取到序列化后的数据再反序列化*//*此处不实现Serializable接口，近程调用办法时会报错，并提醒实体类需继承此接口*/public class User implements Serializable { private String account; private String password; public String getAccount() { return account; } public void setAccount(String account) { this.account = account; } public String getPassword() { return password; } public void setPassword(String password) { this.password = password; }}UserService接口
package online.hupeng.dubbo.provider.service; import online.hupeng.dubbo.provider.domain.User; public interface UserService { User getUserInstance(); }执行mvn install命令将jar包打入本地仓库
结束
在provider下创立子工程provider-service模块(此模块为真正的生产者)
编辑pom文件继承父工程
<parent> <groupId>online.hupeng.dubbo</groupId> <artifactId>provider</artifactId> <version>1.0</version></parent><artifactId>provider-service</artifactId><version>1.0</version><name>provider-service</name><properties> <java.version>1.8</java.version></properties>增加必须依赖
<dependencies> <!-- 此处依赖api模块标准接口 --> <dependency> <groupId>online.hupeng.dubbo</groupId> <artifactId>provider-api</artifactId> <version>1.0</version> </dependency> <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> <exclusions> <exclusion> <groupId>org.junit.vintage</groupId> <artifactId>junit-vintage-engine</artifactId> </exclusion> </exclusions> </dependency> <dependency> <groupId>org.apache.dubbo</groupId> <artifactId>dubbo-spring-boot-starter</artifactId> </dependency> <dependency> <groupId>org.apache.curator</groupId> <artifactId>curator-framework</artifactId> </dependency> <dependency> <groupId>org.apache.curator</groupId> <artifactId>curator-recipes</artifactId> </dependency> <dependency> <groupId>com.101tec</groupId> <artifactId>zkclient</artifactId> </dependency></dependencies>UserService的实现类UserServiceImpl
package online.hupeng.dubbo.provider.service.impl;import online.hupeng.dubbo.provider.domain.User;import online.hupeng.dubbo.provider.service.UserService;import org.apache.dubbo.config.annotation.DubboService; /* dubbo注解，指定接口版本号和超时工夫，调用方需正确填写版本信息 */ @DubboService(version = "1.0", timeout = 300) public class UserServiceImpl implements UserService { @Override public User getUserInstance() { User user = new User(); user.setAccount("admin"); user.setPassword("admin"); return user; }}application.yml配置
dubbo: application: # 指定该服务名称 name: provider registry: # 通信协议 protocol: zookeeper # 注册核心地址 address: 127.0.0.1 # 注册核心端口号 port: 2181 # 也能够不配置protocol和port，间接配置为zookeeper://127.0.0.1:2181 protocol: name: dubbo # 服务裸露端口 port: 8081# 包扫描(此处为扫描dubbo的注解，和SpringBoot无关) scan: base-packages: online.hupeng.dubbo为启动类增加dubbo注解@EnableDubbo
package online.hupeng.dubbo.provider;import org.apache.dubbo.config.spring.context.annotation.EnableDubbo;import org.springframework.boot.SpringApplication;import org.springframework.boot.autoconfigure.SpringBootApplication;@EnableDubbo@SpringBootApplicationpublic class ProviderServiceApplication { public static void main(String[] args) { SpringApplication.run(ProviderServiceApplication.class, args); }}3. 创立消费者
在根我的项目下创立consumer模块
编辑pom文件继承父我的项目
<parent> <artifactId>base</artifactId> <groupId>online.hupeng.dubbo</groupId> <version>1.0</version></parent><artifactId>consumer</artifactId><version>1.0</version>增加必须依赖
<dependencies> <!-- 引入provider-api依赖用以近程调用 --> <dependency> <groupId>online.hupeng.dubbo</groupId> <artifactId>provider-api</artifactId> <version>1.0</version> <scope>compile</scope> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter</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> <scope>test</scope> <exclusions> <exclusion> <groupId>org.junit.vintage</groupId> <artifactId>junit-vintage-engine</artifactId> </exclusion> </exclusions> </dependency> <dependency> <groupId>org.apache.dubbo</groupId> <artifactId>dubbo-spring-boot-starter</artifactId> </dependency> <dependency> <groupId>org.apache.curator</groupId> <artifactId>curator-framework</artifactId> </dependency> <dependency> <groupId>org.apache.curator</groupId> <artifactId>curator-recipes</artifactId> </dependency> <dependency> <groupId>com.101tec</groupId> <artifactId>zkclient</artifactId> </dependency></dependencies>编辑controller层代码近程调用
package online.hupeng.dubbo.consumer.controller;import online.hupeng.dubbo.provider.domain.User;import online.hupeng.dubbo.provider.service.UserService;import org.apache.dubbo.config.annotation.DubboReference;import org.springframework.stereotype.Controller;import org.springframework.web.bind.annotation.GetMapping;import org.springframework.web.bind.annotation.ResponseBody;@Controllerpublic class ConsumerController { /* 近程调用注解，需正确对应生产者的版本号，此处不须要@autowird注入对象 */ @DubboReference(version = "1.0") private UserService userService; @ResponseBody @GetMapping("/test") public User getUser() { return userService.getUserInstance(); }}配置application.yml文件
dubbo: application: name: provider registry: protocol: zookeeper address: 127.0.0.1 port: 2181 protocol: name: dubbo # 服务裸露端口 port: 8081 # 包扫描 scan: base-packages: online.hupeng.dubbo#### 增加SpringBoot启动类package online.hupeng.dubbo.consumer;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
public class ConsumerApplication {
public static void main(String[] args) { SpringApplication.run(ConsumerApplication.class, args);}}
## 4. 测试按程序启动zookeeper、provider-service、consumer拜访http://localhost/test胜利！！！## 最初