参考地址:https://www.cnblogs.com/gaopengfirst/p/9555240.html

首先创建一个maven项目:

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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion> <parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.2.1.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent> <groupId>com.example</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> <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> <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> <dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
<version>${spring-boot.version}</version>
</dependency> <!-- 使用lombok实现JavaBean的get、set、toString、hashCode、equals等方法的自动生成 -->
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>${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> <dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency> <dependency>
<groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId>
<version>2.1.1</version>
</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> </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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.2.1.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.example</groupId>
<artifactId>common</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>common</name>
<description>Demo project for Spring Boot</description> <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>
<exclusions>
<exclusion>
<groupId>org.junit.vintage</groupId>
<artifactId>junit-vintage-engine</artifactId>
</exclusion>
</exclusions>
</dependency>
</dependencies> <build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build> </project>

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.example.common.domin;

import java.io.Serializable;

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;
} @Override
public String toString() {
return "User{" +
"id=" + id +
", name='" + name + '\'' +
", age=" + age +
", sex='" + sex + '\'' +
'}';
}
}

在service中创建UserService接口:

package com.example.common.service;

import com.example.common.domin.User;

/*
*@ZN
*@date 2019/11/11
*/
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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.2.1.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.example</groupId>
<artifactId>provider</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>provider</name>
<description>Demo project for Spring Boot</description> <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.example</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>
<exclusions>
<exclusion>
<groupId>org.junit.vintage</groupId>
<artifactId>junit-vintage-engine</artifactId>
</exclusion>
</exclusions>
</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> <!-- https://mvnrepository.com/artifact/org.mariadb.jdbc/mariadb-java-client -->
<dependency>
<groupId>org.mariadb.jdbc</groupId>
<artifactId>mariadb-java-client</artifactId>
<version>2.5.1</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.example.provider.service.impl.UserImpl"/>
<!-- declare the service interface to be exported -->
<dubbo:service interface="com.example.common.service.UserService" ref="userService"/>
</beans>

Springboot是使用类来作为启动器的,所以启动器ProviderApplication.java,在启动器中将dubbo的配置文件引用,并且去扫描mapper包。

package com.example.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) {
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.example.provider.mapper;

import com.example.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); }

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

package com.example.provider.service.impl;

import com.example.common.domin.User;
import com.example.common.service.UserService;
import com.example.provider.mapper.UserMapper;
import org.springframework.beans.factory.annotation.Autowired; 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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.2.1.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.example</groupId>
<artifactId>customer</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>customer</name>
<description>Demo project for Spring Boot</description> <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.example</groupId>
<artifactId>common</artifactId>
<version>0.0.1-SNAPSHOT</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</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>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.example.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.example.customer.controller;

import com.alibaba.dubbo.config.annotation.Reference;
import com.example.common.domin.User;
import com.example.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: zj
* Date: 2019/11/12
* Time: 10:45
* 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() + "!!!!!!!!!!!!!!!!");
System.out.println(userService.findUser());
return userService.findUser();
}
}
再给customer消费端启动类CustomerApplication:
package com.example.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:

打来浏览器访问:

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!

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