Dubbo+zookeeper实现单表的增删改查

1、数据库准备

建表语句

CREATE TABLE `tb_brand` (
  `id` bigint(20) NOT NULL AUTO_INCREMENT,
  `name` varchar(255) DEFAULT NULL COMMENT '品牌名称',
  `first_char` varchar(1) DEFAULT NULL COMMENT '品牌首字母',
  PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=32 DEFAULT CHARSET=utf8;

/*Data for the table `tb_brand` */

insert  into `tb_brand`(`id`,`name`,`first_char`) values (1,'联想','L'),(2,'华为','H'),(3,'三星','S'),(4,'小米','X'),(5,'OPPO','O'),(6,'360','S'),(7,'中兴','Z'),(8,'魅族','M'),(9,'苹果','P'),(10,'VIVO','V'),(11,'诺基亚','N'),(12,'锤子','C'),(13,'长虹','C'),(14,'海尔','H'),(15,'飞利浦','F'),(16,'TCL','T'),(17,'海信','H'),(18,'夏普','X'),(19,'创维','C'),(20,'东芝','D'),(21,'康佳','K'),(22,'LG','L'),(25,'啊','a'),(26,'背背佳','B'),(29,'好的2','H'),(30,'测试','T'),(31,'网易','W');

2、创建Java项目

第一步、创建一个空的Java项目,并创建父工程dz_parent

第二步、创建子模块

dz_dao——》jar工程

dz_manager_web——》war工程

dz_pojo——》jar工程

dz_sellergoods_interface——》jar工程，用来维护dubbo+zookeeper中的服务消费者和提供者的接口

dz_sellergoods_service——》war工程

第三步、在父工程pom.xml中添加所需的jar包依赖和插件

<!-- 集中定义依赖版本号 -->
    <properties>
        <junit.version>4.12</junit.version>
        <spring.version>4.2.4.RELEASE</spring.version>
        <pagehelper.version>4.0.0</pagehelper.version>
        <servlet-api.version>2.5</servlet-api.version>
        <dubbo.version>2.8.4</dubbo.version>
        <zookeeper.version>3.4.6</zookeeper.version>
        <zkclient.version>0.1</zkclient.version>
        <mybatis.version>3.2.8</mybatis.version>
        <mybatis.spring.version>1.2.2</mybatis.spring.version>
        <mybatis.paginator.version>1.2.15</mybatis.paginator.version>
        <mysql.version>5.1.32</mysql.version>
        <druid.version>1.0.9</druid.version>
    </properties>


    <dependencies>

        <!-- Spring -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-beans</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-aspects</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jms</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context-support</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-test</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <!-- dubbo相关 -->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>dubbo</artifactId>
            <version>${dubbo.version}</version>
        </dependency>
        <dependency>
            <groupId>org.apache.zookeeper</groupId>
            <artifactId>zookeeper</artifactId>
            <version>${zookeeper.version}</version>
        </dependency>
        <dependency>
            <groupId>com.github.sgroschupf</groupId>
            <artifactId>zkclient</artifactId>
            <version>${zkclient.version}</version>
        </dependency>
        <dependency>
            <groupId>javassist</groupId>
            <artifactId>javassist</artifactId>
            <version>3.11.0.GA</version>
        </dependency>

        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.9</version>
        </dependency>
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>fastjson</artifactId>
            <version>1.2.28</version>
        </dependency>
        <dependency>
            <groupId>commons-codec</groupId>
            <artifactId>commons-codec</artifactId>
            <version>1.10</version>
        </dependency>
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>servlet-api</artifactId>
            <version>2.5</version>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>com.github.pagehelper</groupId>
            <artifactId>pagehelper</artifactId>
            <version>${pagehelper.version}</version>
        </dependency>
        <!-- Mybatis -->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>${mybatis.version}</version>
        </dependency>
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis-spring</artifactId>
            <version>${mybatis.spring.version}</version>
        </dependency>
        <dependency>
            <groupId>com.github.miemiedev</groupId>
            <artifactId>mybatis-paginator</artifactId>
            <version>${mybatis.paginator.version}</version>
        </dependency>
        <!-- MySql -->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>${mysql.version}</version>
        </dependency>
        <!-- 连接池 -->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
            <version>${druid.version}</version>
        </dependency>

    </dependencies>

 maven工程插件

<build>
        <plugins>
            <!-- java编译插件 -->
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.2</version>
                <configuration>
                    <source>1.8</source>
                    <target>1.8</target>
                    <encoding>UTF-8</encoding>
                </configuration>
            </plugin>

            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-surefire-plugin</artifactId>
                <configuration>
                    <skip>true</skip>
                </configuration>
            </plugin>
        </plugins>

        <!-- 使用Maven部署的时候，xml和properties配置文件也一起部署到Tomcat -->
        <!--tomcat启动的时候Maven工程默认把src/main/resources的*.properties;*.xml文件加载到Tomcat中-->
        <!--会有中情况：Mapper接口类和Mapper映射文件同包同名src/main/java 下 -->
        <resources>
            <resource>
                <directory>src/main/java</directory>
                <includes>
                    <include>**/*.properties</include>
                    <include>**/*.xml</include>
                    <include>**/*.conf</include>
                </includes>
                <filtering>false</filtering>
            </resource>
            <!-- 默认是以下配置 -->
            <resource>
                <directory>src/main/resources</directory>
                <includes>
                    <include>**/*.properties</include>
                    <include>**/*.xml</include>
                    <include>**/*.conf</include>
                </includes>
                <filtering>false</filtering>
            </resource>
        </resources>

    </build>

第四步、在各个模块的pom.xml配置文件中添加模块之间的依赖

依赖关系如下

dao依赖pojo

interface依赖pojo

service依赖interface

web依赖service

 第五步、创建pojo实体类

此处使用mybatis的逆向工程生成所需的类及其接口和映射文件

5.1 创建一个maven模块，命名为mybatis_generator，导入如下pom依赖和插件

<dependencies>
        <dependency>
            <groupId>org.mybatis.generator</groupId>
            <artifactId>mybatis-generator-core</artifactId>
            <version>1.3.7</version>
        </dependency>
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>3.4.5</version>
        </dependency>
        <dependency>
            <groupId>log4j</groupId>
            <artifactId>log4j</artifactId>
            <version>1.2.17</version>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.mybatis.generator</groupId>
                <artifactId>mybatis-generator-maven-plugin</artifactId>
                <version>1.3.7</version>
                <configuration>
                    <verbose>true</verbose>
                    <overwrite>true</overwrite>
                </configuration>
            </plugin>
        </plugins>
    </build>

 5.2 在mybatis_generator模块的resources目录下编写逆向工程配置文件generatorConfig.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE generatorConfiguration
        PUBLIC "-//mybatis.org//DTD MyBatis Generator Configuration 1.0//EN"
        "http://mybatis.org/dtd/mybatis-generator-config_1_0.dtd">
<generatorConfiguration>
    <!-- classPathEntry:数据库的 JDBC驱动的jar 包地址 -->
    <classPathEntry
            location="F:\mysql-connector-java-5.1.32.jar" />
    <context id="default" targetRuntime="MyBatis3">

        <!-- 配置生成pojo的序列化的插件，mybatis支持很多插件，这些插件都在 org.mybatis.generator.plugins包下  -->
        <plugin type="org.mybatis.generator.plugins.SerializablePlugin" />

        <commentGenerator>
            <!-- 是否去除自动生成的注释 true：是 ： false:否 -->
            <property name="suppressAllComments" value="false" />
        </commentGenerator>
        <!--数据库连接的信息：驱动类、连接地址、用户名、密码 -->

        <jdbcConnection driverClass="com.mysql.jdbc.Driver"
                        connectionURL="jdbc:mysql://127.0.0.1:3306/pinyougoudb" userId="root"
                        password="root">
        </jdbcConnection>

        <javaTypeResolver>
            <property name="forceBigDecimals" value="false" />
        </javaTypeResolver>

        <!-- targetProject:生成 POJO 类的位置 -->
        <javaModelGenerator targetPackage="com.alibaba.pojo" targetProject="F:\coding\dubboandzookeeper\dz_parent\dz_pojo/src/main/java">
            <!-- 是否对model添加 构造函数 -->
            <property name="constructorBased" value="true"/>
            <!-- enableSubPackages:是否让schema 作为包的后缀，是否允许子包，即targetPackage.schemaName.tableName -->
            <property name="enableSubPackages" value="false"/>
            <!-- 建立的Model对象是否 不可改变  即生成的Model对象不会有 setter方法，只有构造方法 -->
            <property name="immutable" value="false"/>
            <!-- 是否对类CHAR类型的列的数据进行trim操作，从数据库返回的值被清理前后的空格 -->
            <property name="trimStrings" value="true"/>
        </javaModelGenerator>

        <!-- 生成 XML文件 -->
        <sqlMapGenerator targetPackage="com.alibaba.dao.mappper"      targetProject="F:\coding\dubboandzookeeper\dz_parent\dz_dao/src/main/resources">
            <property name="enableSubPackages" value="false" />
        </sqlMapGenerator>
        <!--生成接口-->
        <javaClientGenerator type="XMLMAPPER"
                             targetPackage="com.alibaba.dao.mapper"  targetProject="F:\coding\dubboandzookeeper\dz_parent\dz_dao/src/main/java">
            <property name="enableSubPackages" value="false" />
        </javaClientGenerator>


        <!-- 指定数据库表 -->
        <table  tableName="tb_brand" domainObjectName="TbBrand" mapperName="TbBrandMapper"
                enableCountByExample="false" enableDeleteByExample="false"
                enableSelectByExample="true" enableUpdateByExample="false"/>
    </context>
</generatorConfiguration>

 5.3 点击maven的mybatis的逆向工程生成插件的generate命令生成文件到配置的指定位置

 第六步、编写接口