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README
Apache-2.0

template-factory

1.背景

该项目的目的是目前在工作中,碰到了越来越多的可重复性代码,每次针对一个新的需求时,都需要重新手写一遍(service\controller\vo\dto等),极其繁琐,因此开发了本项目

2.介绍

template-factory是一个maven plugin组件,开发理念是采用模板组+模板Render组件的模式进行开发,模板引擎使用的是国产JFinal中的Enjoy.

  • 模板组:每个人工作中碰到的重复性工作(CRUD)不一样,因此模板组实际上是我们在工作中对于某一特定领域中,繁琐的重复性代码,我们归为一组,组成我们的模板组,属于业务归类
  • 模板Render:在template-factory中,每一个生成的目标文件,都需要一个Render组件进行包装及渲染,template-factory负责将请求参数的上下文向下传递,由开发者自己实现具体的业务规则

2.1模板组顶级接口设计

接口设计如下:

public interface TemplateFactory {

    /**
     * 当前Factory的别名,业务组名称,唯一即可,不要和内置的Factory重复
     * @return
     */
    String getAliasName();

    /**
     * 获取当前模板的Render实例
     * @return
     */
    Map<String, TemplateFactoryRender> getRenders();
    /**
     * 调用本Factory下的Render组件进行输出
     * @param templateContext
     */
    void apply(TemplateContext templateContext);
}

2.2模板Render顶级接口设计

接口设计如下:

public interface TemplateFactoryRender {
    /**
     * 构造当前模板的属性
     * @return
     */
    Map<String,Object> buildKeys(TemplateContext templateContext, TemplateConfiguration templateConfiguration);


    /**
     * 构造输出目录路径
     * @param templateContext
     * @param templateConfiguration
     * @return
     */
    String buildTargetPath(TemplateContext templateContext, TemplateConfiguration templateConfiguration);

    /**
     * 渲染
     * @param templateContext
     * @param templateConfiguration
     */
    void render(TemplateContext templateContext, TemplateConfiguration templateConfiguration);
}

每一个模板文件(开发者自行扩展的情况下)的输出都需要开发者实现该接口,方法说明如下:

  • buildKeys:主要用于构建模板引擎Enjoy的数据参数,构建该参数是为了在使用Enjoy渲染输出时进行参数的替换
  • buildTargetPath:构造模板的输出路径
  • render: 开发者实现该接口,获取模板Template对象,调用Enjoy引擎的方法进行模板输出

以内置的AideStoreServiceTemplateRender为例,代码如下:


/***
 *
 * @since:template-factory 1.0
 * @author <a href="mailto:xiaoymin@foxmail.com">xiaoymin@foxmail.com</a> 
 * 2020/06/07 17:28
 */
public class AideStoreServiceTemplateRender extends AbstractTemplateRender{

    Logger logger= LoggerFactory.getLogger(AideStoreServiceTemplateRender.class);

    @Override
    public Map<String, Object> buildKeys(TemplateContext templateContext, TemplateConfiguration templateConfiguration) {
        Map<String,Object> map=new HashMap<>();
        map.put("packageName",templateConfiguration.getPackageName());
        map.put("modelName",templateConfiguration.getDomainObjectName());
        map.put("modelArgumentName",StrUtil.lowerFirst(templateConfiguration.getDomainObjectName()));
        String description="业务Service";
        //开发者信息
        map.put("email",templateContext.getConfiguration().getDeveloperConfiguration().getEmail());
        map.put("projectName",templateContext.getConfiguration().getMavenProject().getName());
        map.put("projectVersion",templateContext.getConfiguration().getMavenProject().getVersion());

        map.put("description",description);
        map.put("currentTime", LocalDateTime.now().format(DateTimeFormatter.ofPattern("yyyy/MM/dd HH:mm")));
        return map;
    }

    @Override
    public String buildTargetPath(TemplateContext templateContext, TemplateConfiguration templateConfiguration) {
        return getDefaultPathByType(templateContext,templateConfiguration,"service",templateConfiguration.getDomainObjectName()+"Service.java");
    }

    @Override
    public void render(TemplateContext templateContext, TemplateConfiguration templateConfiguration) {
        ISource source=new TemplateDataSource(true,templateConfiguration.getPath());
        Template template=getEngine().getTemplate(source);
        template.render(this.buildKeys(templateContext,templateConfiguration),buildTargetPath(templateContext,templateConfiguration));
    }
}

3.使用

首先,在Maven项目中添加plugin组件依赖,配置如下:

<plugin>
    <groupId>com.github.xiaoymin</groupId>
    <artifactId>template-factory-maven-plugin</artifactId>
    <version>1.0</version>
    <configuration>
        <!--template-factory默认的配置文件是在resouces目录下,如果你讲配置文件放在某个文件夹里,则需要在此配置xml的具体路径-->
        <configurationFile>src/main/resources/templateFactoryConfig.xml</configurationFile>
    </configuration>
</plugin>

参数说明:

  • configurationFile:template-factory插件的配置文件路径,如果你讲该文件存放在src/main/resources目录下,且文件名称为templateFactoryConfig.xml,则该参数可以不用配置,否则你需要指定具体的路径

4.配置文件

templateFactoryConfig.xml完整配置文件如下:

<?xml version="1.0" encoding="UTF-8"?>
<templateFactoryConfiguration>
    <!-- JDBC路径 -->
    <jdbcPathLocation>D:\Users\xiaoymin\.m2\repository\org\mariadb\jdbc\mariadb-java-client\2.4.2\mariadb-java-client-2.4.2.jar</jdbcPathLocation>
    <!--项目、开发者信息,这些信息会配置在生成的java文件中去,如果你不配置该属性,则默认是templateFactory的作者(xiaoymin@foxmail.com)-->
    <developerConfiguration name="xiaoymin" email="xiaoymin7@foxmail.com"></developerConfiguration>
    <context id="test">
        <!-- 数据库JDBC配置 -->
        <!--数据库链接URL,用户名、密码 -->
        <jdbcConnection driverClass="org.mariadb.jdbc.Driver" connectionURL="jdbc:mariadb://localhost:3306/knife4j_admin" userId="root" password="123456">
        </jdbcConnection>
        <!--模板输出-->
        <templateFactory module="用户" tableName="admin_user" alias="AideStoreFactory" type="">
            <template alias="add" domainObjectName="AdminUserAddVo" packageName="com.example.demo"></template>
            <template alias="update" domainObjectName="AdminUserUpdateVo" packageName="com.example.demo"></template>
            <template alias="search" domainObjectName="AdminUserSearchVo" packageName="com.example.demo"></template>
            <template alias="dto" domainObjectName="AdminUserDTO" packageName="com.example.demo"></template>
            <template alias="service" domainObjectName="AdminUser" mapperName="User" packageName="com.example.demo"></template>
            <template alias="serviceImpl" domainObjectName="AdminUser" mapperName="User" packageName="com.example.demo"></template>
            <template alias="controller" domainObjectName="AdminUser" module="用户信息" api="/admin/product" packageName="com.example.demo"></template>
        </templateFactory>
    </context>
</templateFactoryConfiguration>

4.1参数说明

jdbcPathLocation

当前数据库的驱动Jar包路径,必须写完整路径

developerConfiguration

开发者详细,如果模板是生成Java文件,在请求上下文中,你可以根据此来构建输出到.java文件中的开发者信息中去

主要包含的参数:

参数 说明
name 开发者名称
email 开发者邮箱地址

context

context是配置中具体需要进行模板输出的一组,你可以配置多个,针对不同的数据源来生成

包含的属性如下:

jdbcConnection

数据库连接的基础配置信息,主要包括:

  • driverClass:当前数据库的驱动类
  • connectionURL:目标数据库的连接地址
  • userId:数据库访问用户名
  • password:数据库访问密码

templateFactory

该接口是由用户自行配置模板,可以配置多个,一般是以数据库表为基础,当然,tableName属性并不是必须,如果你的模板输出并不需要使用到数据库,那么可以不用配置上面的jdbcConnection的数据库配置

  • tableName:数据库表名
  • factoryAlias:模板组别名,如果template-factory已经内置实现的factory满足你的要求,那么,你可以使用,否则需要自行实现,自定义即可
  • factoryType:模板组的具体类名,开发者自行实现的需要填写完整类的路径,如果是已经在template-factory中内置实现的,该参数可以不填

template

template节点是一个模板组下的真正的模板配置,属性如下:

  • alias:当前模板Render的别名,仅仅在该Factory组下不重名即可
  • domainObjectName:实体类名称
  • packageName:包路径

4.2内置模板组及Render

目前template-factory仅仅实现了作者在工作中常见的重复性代码,目前主要实现如下:

TemplateFactory模板组

别名 类名
AideStoreFactory com.github.xiaoymin.template.factory.impl.AideStoreTemplateFactory

TemplateRender实现

别名 类名 说明
add AideStoreAddTemplateRender 生成Swagger模板,主要用于新增数据库记录的Vo
search AideStoreSearchTemplateRender 分页实体Vo,用于模糊查询与前端交互
update AideStoreUpdateTemplateRender 更新数据库记录的Vo
dto AideStoreDTOTemplateRender 返回数据的DTO
service AideStoreServiceTemplateRender 业务Service接口

5.1最后

如果你在工作中碰见很多重复性的代码而又懒得写,不妨将你的代码通过PR提交上来,一般一周一个版本提交到Maven中央仓库

在以后的工作中,高效的写代码,快乐的工作和生活~~!

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