• 搭建SpringBoot+dubbo+zookeeper+maven框架(一)


    这几天项目还没来,所以就自己试着参考网上的一些资料,搭建了一个SpringBoot+dubbo+zookeeper+maven框架,网上参考的很多资料照着他们一步一步搭建,最后很多都运行不通,很是郁闷,最后自己在总结了他们之后自己搭建了一个,项目的源码我会附在文章的最后,并且后期还会继续优化,希望对大家能有所帮助。

    参考的文章地址:

    https://www.jianshu.com/p/2b128ac75e95

    https://blog.csdn.net/hjl021/article/details/79192115#commentBox

    既然要用到zookeeper,我们肯定要在自己本地下载一个zookeeper,这个网上一搜一大堆,这里我就不多说了。

    首先新建一个maven项目,项目目录如下图所示。

    再在该父项目中创建3个module,分别是:provider(服务端)、customer(消费端)、common(存放所有接口和实体类)

    我们在父项目的pom.xml文件中添加需要的jar包。

    <?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">
       <modelVersion>4.0.0</modelVersion>
    
       <groupId>com.lj</groupId>
       <artifactId>springboot-mybatis-dubbo-zookeeper</artifactId>
       <version>0.0.1-SNAPSHOT</version>
       <packaging>jar</packaging>
    
       <name>springboot-mybatis-dubbo-zookeeper</name>
       <description>Demo project for Spring Boot</description>
    
       <parent>
          <groupId>org.springframework.boot</groupId>
          <artifactId>spring-boot-starter-parent</artifactId>
          <version>2.0.4.RELEASE</version>
          <relativePath/> <!-- lookup parent from repository -->
       </parent>
    
       <modules>
          <!-- 服务消费者工程 -->
          <module>customer</module>
          <!--  服务提供者工程-->
          <module>provider</module>
          <!-- 主要放实体、接口、也可以放一些公用的工具类工程-->
          <module>common</module>
       </modules>
    
       <properties>
          <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
          <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
          <java.version>1.8</java.version>
            <dubbo.version>2.5.5</dubbo.version>
            <zkclient.version>0.10</zkclient.version>
            <lombok.version>1.16.18</lombok.version>
            <spring-boot.version>1.5.7.RELEASE</spring-boot.version>
       </properties>
    
       <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-web</artifactId>
          </dependency>
    
          <dependency>
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-test</artifactId>
             <scope>test</scope>
          </dependency>
    
            <!-- 使用lombok实现JavaBean的get、set、toString、hashCode、equals等方法的自动生成  -->
            <dependency>
                <groupId>org.projectlombok</groupId>
                <artifactId>lombok</artifactId>
                <version>${lombok.version}</version>
                <scope>provided</scope>
            </dependency>
    
            <!-- Dubbo依赖 -->
            <dependency>
                <groupId>com.alibaba</groupId>
                <artifactId>dubbo</artifactId>
                <version>${dubbo.version}</version>
                <exclusions>
                    <exclusion>
                        <groupId>log4j</groupId>
                        <artifactId>log4j</artifactId>
                    </exclusion>
                </exclusions>
            </dependency>
    
             <!--zookeeper的客户端依赖-->
            <dependency>
                <groupId>com.101tec</groupId>
                <artifactId>zkclient</artifactId>
                <version>${zkclient.version}</version>
            </dependency>
       </dependencies>
    
       <build>
          <plugins>
             <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <configuration>
                   <source>${java.version}</source>
                   <target>${java.version}</target>
                   <encoding>UTF-8</encoding>
                </configuration>
    
             </plugin>
             <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-resources-plugin</artifactId>
                <configuration>
                   <encoding>UTF-8</encoding>
                </configuration>
             </plugin>
          </plugins>
       </build>
    
    </project>
    
    

     至此,父项目就可以不用管它了。

    接着我们再来搭建common模块:

    首先是pom.xml,如下:

    <?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">
       <modelVersion>4.0.0</modelVersion>
    
       <groupId>com.lj</groupId>
       <artifactId>common</artifactId>
       <version>0.0.1-SNAPSHOT</version>
       <packaging>jar</packaging>
    
       <name>common</name>
       <description>Demo project for Spring Boot</description>
    
       <parent>
          <groupId>org.springframework.boot</groupId>
          <artifactId>spring-boot-starter-parent</artifactId>
          <version>2.0.4.RELEASE</version>
          <relativePath/> <!-- lookup parent from repository -->
       </parent>
    
       <properties>
          <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
          <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
          <java.version>1.8</java.version>
       </properties>
    
       <dependencies>
          <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>
    
       </dependencies>
    
       <build>
          <plugins>
             <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
             </plugin>
          </plugins>
       </build>
    
    </project>

    再在common下创建domin(放实体类)和service(放接口)两个文件夹

    在domin中创建User.java实体类(这里有一个坑,就是该实体类一定要实现java.io.Serializable这个接口,否则会报错这是因为一个类只有实现了Serializable接口,它的对象才是可序列化的。如果要序列化某些类的对象,这些类就必须实现Serializable接口。而实际上,Serializable是一个空接口,没有什么具体内容,它的目的只是简单的标识一个类的对象可以被序列化。这是我踩过的一个坑,大家可以试着把implements Serializable 去掉,肯定会报错的,报错中会有一句Serialized class com.yykj.mall.dto.ProductListItemDTO must implement java.io.Serializable):

    package com.lj.common.domin;
    
    import java.io.Serializable;
    import java.util.PrimitiveIterator;
    
    /**
     * Created with IntelliJ IDEA.
     * User: gaopeng
     * Date: 2018/8/28 0028
     * Time: 18:00
     * Description:
     */
    public class User implements Serializable{
        private int id;
    
        private  String name;
    
        private  int age;
    
        private String sex;
    
        public int getId() {
            return id;
        }
    
        public void setId(int id) {
            this.id = id;
        }
    
        public String getName() {
            return name;
        }
    
        public void setName(String name) {
            this.name = name;
        }
    
        public int getAge() {
            return age;
        }
    
        public void setAge(int age) {
            this.age = age;
        }
    
        public String getSex() {
            return sex;
        }
    
        public void setSex(String sex) {
            this.sex = sex;
        }
    }

     在service中创建UserService接口:

    package com.lj.common.service;
    
    import com.lj.common.domin.User;
    
    /**
    * @author gaopeng
    * @date 2018/8/28 0028 18:04
    */
    public interface UserService {
        User findUser();
    }

     application.properties这个文件是空的,大家不用理会,此时,common模块基本完成。

    接下来就是provider模块了

     

    如上图,pom.xml添加依赖:

    
    
    <?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">
       <modelVersion>4.0.0</modelVersion>
    
       <groupId>com.lj</groupId>
       <artifactId>provider</artifactId>
       <version>0.0.1-SNAPSHOT</version>
       <packaging>jar</packaging>
    
       <name>provider</name>
       <description>Demo project for Spring Boot</description>
    
       <parent>
          <groupId>org.springframework.boot</groupId>
          <artifactId>spring-boot-starter-parent</artifactId>
          <version>2.0.4.RELEASE</version>
          <relativePath/> <!-- lookup parent from repository -->
       </parent>
    
       <properties>
          <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
          <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
          <java.version>1.8</java.version>
          <zkclient.version>0.10</zkclient.version>
       </properties>
    
       <dependencies>
          <dependency>
             <groupId>com.lj</groupId>
             <artifactId>common</artifactId>
             <version>0.0.1-SNAPSHOT</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>
          </dependency>
    
    
          <dependency>
             <groupId>com.alibaba</groupId>
             <artifactId>dubbo</artifactId>
             <version>2.5.5</version>
                <exclusions>
                    <exclusion>
                        <groupId>log4j</groupId>
                        <artifactId>log4j</artifactId>
                    </exclusion>
                </exclusions>
          </dependency>
    
          <!--zookeeper的客户端依赖-->
          <dependency>
             <groupId>com.101tec</groupId>
             <artifactId>zkclient</artifactId>
             <version>${zkclient.version}</version>
          </dependency>
          
          <dependency>
             <groupId>org.mybatis.spring.boot</groupId>
             <artifactId>mybatis-spring-boot-starter</artifactId>
             <version>1.3.1</version>
          </dependency>
          <dependency>
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-jdbc</artifactId>
          </dependency>
          <dependency>
             <groupId>mysql</groupId>
             <artifactId>mysql-connector-java</artifactId>
             <version>5.1.35</version>
          </dependency>
          <!-- alibaba的druid数据库连接池 -->
          <dependency>
             <groupId>com.alibaba</groupId>
             <artifactId>druid</artifactId>
             <version>1.0.11</version>
          </dependency>
       </dependencies>
    
       <build>
          <plugins>
             <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
             </plugin>
          </plugins>
       </build>
    
    </project>
    
    
    

    我们这边使用springboot,因为基本上都封装好了,配置就很简单了。我们先新增一个application.yml,具体配置如下,这边直接将mybatis的配置写在配置文件里了,就不需要像ssm一样需要xml文件配置了。application.yml:
    server:
      port: 8082
      servlet:
        context-path: /
    spring:
     datasource:
            name: test
            url: jdbc:mysql://127.0.0.1:3306/springdb
            username: root
            password: root
            # 使用druid数据源
            type: com.alibaba.druid.pool.DruidDataSource
            driver-class-name: com.mysql.jdbc.Driver
            filters: stat
            maxActive: 20
            initialSize: 1
            maxWait: 60000
            minIdle: 1
            timeBetweenEvictionRunsMillis: 60000
            minEvictableIdleTimeMillis: 300000
            validationQuery: select 'x'
            testWhileIdle: true
            testOnBorrow: false
            testOnReturn: false
            poolPreparedStatements: true
            maxOpenPreparedStatements: 20
            mybatis:
              type-aliases-package:  domain
    同时,我们需要在项目中配置dubbo,让该项目成为提供者。
    SpringBoot_Dubbo_Provider 的 spring-dubbo.xml:
    <?xml version="1.0" encoding="UTF-8"?>
    <beans xmlns="http://www.springframework.org/schema/beans"
           xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
           xmlns:dubbo="http://code.alibabatech.com/schema/dubbo"
           xsi:schemaLocation="http://www.springframework.org/schema/beans
           http://www.springframework.org/schema/beans/spring-beans.xsd
           http://code.alibabatech.com/schema/dubbo
           http://code.alibabatech.com/schema/dubbo/dubbo.xsd">
    
        <dubbo:application name="provider"/>
        <!-- 注册中心的ip地址 -->
        <dubbo:registry address="zookeeper://127.0.0.1:2181"/>
        <!-- 扫描注解包路径,多个包用逗号分隔,不填pacakge表示扫描当前ApplicationContext中所有的类 -->
        <dubbo:annotation package="service.impl"/>
    
        <!-- use dubbo protocol to export service on port 20880 -->
        <dubbo:protocol name="dubbo" port="20880"/>
    
        <!-- service implementation, as same as regular local bean -->
        <bean id="userService" class="com.lj.provider.service.impl.UserImpl"/>
        <!-- declare the service interface to be exported -->
        <dubbo:service interface="com.lj.common.service.UserService" ref="userService"/>
    </beans>
    
    

    Springboot是使用类来作为启动器的,所以我们启动添加一个启动器ProviderApplication.java,在启动器中将dubbo的配置文件引用,并且去扫描mapper包。

    SpringBoot_Dubbo_Provider ProviderApplication.java:
    
    package com.lj.provider;
    
    import org.mybatis.spring.annotation.MapperScan;
    import org.springframework.boot.SpringApplication;
    import org.springframework.boot.autoconfigure.SpringBootApplication;
    import org.springframework.context.annotation.ImportResource;
    
    import java.io.IOException;
    
    @SpringBootApplication
    @ImportResource({"classpath:spring-dubbo.xml"})
    @MapperScan("mapper")
    public class ProviderApplication {
    
       public static void main(String[] args) throws IOException {
          SpringApplication.run(ProviderApplication.class, args);
          System.out.println("服务端启动成功!!!");
          try {
             System.in.read();
          } catch (IOException e) {
             e.printStackTrace();
          }
       }
    }
    同样我们也要为这个项目写一个启动器。在启动器中加载dubbo配置文件 。这里提供者和消费者两个项目不能使用相同的端口号,所以消费者这边端口我使用的是8081 提供者为8082。也就是在provider中的application.properties中写上server.port=8082,在customer中的application.properties中写上server.port=8081
     

       然后创建mapper文件夹,在里面创建UserMapper接口,接口内容如下:

    package com.lj.provider.mapper;
    
    import com.lj.common.domin.User;
    import org.apache.ibatis.annotations.*;
    
    import java.util.List;
    
    @Mapper
    public interface UserMapper {
        @Results(id = "userMap", value = {
                @Result(column = "id", property = "id"),
                @Result(column = "name", property = "name"),
                @Result(column = "age", property = "age"),
                @Result(column = "sex", property = "sex")})
        @Select("SELECT * FROM u_user")
        List<User> getAll();
    
        @Select("SELECT * FROM u_user t WHERE t.id = #{id}")
        @ResultMap("userMap")
        User getOne(Long id);
    }

     再在service文件夹下的Impl中编写UserImpl接口的实现类,内容如下:

    package com.lj.provider.service.impl;
    
    import com.lj.common.domin.User;
    import com.lj.common.service.UserService;
    import com.lj.provider.mapper.UserMapper;
    import org.springframework.beans.factory.annotation.Autowired;
    
    import javax.annotation.Resource;
    
    /**
     * Created with IntelliJ IDEA.
     * User: gaopeng
     * Date: 2018/8/28 0028
     * Time: 20:02
     * Description:
     */
    @Service(version = "1.0.0")
    public class UserImpl implements UserService {
    
        @Autowired
        private UserMapper userMapper;
    
        @Override
        public User findUser() {
            return userMapper.getOne(1l);
        }
    }

     此时provider服务端就编写完毕了。

    接下来就是编写customer消费端了:

    pom.xml添加依赖:

    <?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">
       <modelVersion>4.0.0</modelVersion>
    
       <groupId>com.lj</groupId>
       <artifactId>customer</artifactId>
       <version>0.0.1-SNAPSHOT</version>
       <packaging>jar</packaging>
    
       <name>customer</name>
       <description>Demo project for Spring Boot</description>
    
       <parent>
          <groupId>org.springframework.boot</groupId>
          <artifactId>spring-boot-starter-parent</artifactId>
          <version>2.0.4.RELEASE</version>
          <relativePath/> <!-- lookup parent from repository -->
       </parent>
    
       <properties>
          <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
          <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
          <java.version>1.8</java.version>
            <zkclient.version>0.10</zkclient.version>
       </properties>
    
       <dependencies>
          <dependency>
             <groupId>com.lj</groupId>
             <artifactId>common</artifactId>
             <version>0.0.1-SNAPSHOT</version>
          </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>
          </dependency>
    
            <dependency>
                <groupId>com.alibaba</groupId>
                <artifactId>dubbo</artifactId>
                <version>2.5.5</version>
                <exclusions>
                    <exclusion>
                        <groupId>log4j</groupId>
                        <artifactId>log4j</artifactId>
                    </exclusion>
                </exclusions>
            </dependency>
    
            <!--zookeeper的客户端依赖-->
            <dependency>
                <groupId>com.101tec</groupId>
                <artifactId>zkclient</artifactId>
                <version>${zkclient.version}</version>
            </dependency>
       </dependencies>
    
       <build>
          <plugins>
             <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
             </plugin>
          </plugins>
       </build>
    
    
    </project>

     接下来要为dubbo编写xml配置文件,在resource文件夹中新建spring-dubbo.xml文件,配置内容如下:

    <?xml version="1.0" encoding="UTF-8"?>
    <beans xmlns="http://www.springframework.org/schema/beans"
           xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
           xmlns:dubbo="http://code.alibabatech.com/schema/dubbo"
           xsi:schemaLocation="http://www.springframework.org/schema/beans
           http://www.springframework.org/schema/beans/spring-beans.xsd
           http://code.alibabatech.com/schema/dubbo
           http://code.alibabatech.com/schema/dubbo/dubbo.xsd">
    
        <dubbo:application name="consumer"/>
        <dubbo:registry address="zookeeper://127.0.0.1:2181"/>
        <dubbo:protocol name="dubbo" port="20880"/>
        <dubbo:reference id="userService" check="false" interface="com.lj.common.service.UserService"/>
        <dubbo:annotation package="controller"/>
    </beans>

    然后就是编写controller了,创建UserController.java文件,调用common中的UserService接口,这里是用注解的形式注入的
    package com.lj.customer.controller;
    
    import com.alibaba.dubbo.config.annotation.Reference;
    import com.lj.common.domin.User;
    import com.lj.common.service.UserService;
    import org.springframework.web.bind.annotation.GetMapping;
    import org.springframework.web.bind.annotation.RestController;
    
    import javax.annotation.Resource;
    
    /**
     * Created with IntelliJ IDEA.
     * User: gaopeng
     * Date: 2018/8/28 0028
     * Time: 17:45
     * Description:
     */
    @RestController
    public class UserController {
        @Resource
        @Reference(version = "1.0.0")
        private UserService userService;
    
        @GetMapping("getUser")
        public User user(){
            System.out.println("进来了!!!!!!!!!!!!!!!!");
            System.out.println(userService.hashCode()+"!!!!!!!!!!!!!!!!");
            return userService.findUser();
        }
    }
    再给customer消费端写一个启动类CustomerApplication:
    package com.lj.customer;
    
    import org.springframework.boot.SpringApplication;
    import org.springframework.boot.autoconfigure.SpringBootApplication;
    import org.springframework.context.annotation.ImportResource;
    
    @SpringBootApplication
    @ImportResource({"classpath:spring-dubbo.xml"})
    public class CustomerApplication {
    
       public static void main(String[] args) {
          SpringApplication.run(CustomerApplication.class, args);
            System.out.println("消费端启动成功!!!");
       }
    }
    这样,所有的配置我们都完成了,这里,我就简单的从数据库根据ID查一个user信息为例子。
    首先创建一个u_user表:
    CREATE TABLE `u_user` (
      `id` int(11) NOT NULL AUTO_INCREMENT COMMENT '主键id',
      `name` varchar(256) DEFAULT NULL COMMENT '姓名',
      `age` int(11) DEFAULT NULL COMMENT '年龄',
      `sex` varchar(4) DEFAULT NULL COMMENT '性别',
      PRIMARY KEY (`id`)
    ) ENGINE=InnoDB AUTO_INCREMENT=3 DEFAULT CHARSET=utf8

    这时再先后启动provider和customer,可以在dubbo可视化界面中看到项目的生产者和消费者都启动成功了:

    再在postman中发送请求:

    可以看到,数据已经从数据库中查出来了,至此,SpringBoot+dubbo+zookeeper+maven框架搭建完毕!

    这是下载该项目框架demo的网址:https://download.csdn.net/download/weixin_38340967/10634074

    后期还会对该框架添加分页,事务,代码自动生成等功能,希望各位小伙伴们的支持,谢谢!!!

    未完待续。。。

    
    
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  • 原文地址:https://www.cnblogs.com/gaopengfirst/p/9555240.html
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