schema

Faceted searching and categories in MySQL and Solr

一笑奈何 提交于 2020-01-01 18:53:25
问题 I'd like to be able to do a search page similar to ebay or newegg where you can select categories and different facets depending on the categories - could anybody point me in the right direction? How do I store and search such facets and categories with the products in Solr and what sort of DB schema would I be looking at with MySQL. (I'm guessing I'd use MySQL to feed Solr, yes?) Please excuse my lack of knowledge on these subjects - I'm pretty new to all of this. I'd greatly appreciate the

关于Spring中的<context:annotation-config/>配置

不想你离开。 提交于 2020-01-01 16:21:48
当我们需要使用BeanPostProcessor时,直接在Spring配置文件中定义这些Bean显得比较笨拙,例如: 使用@Autowired注解,必须事先在Spring容器中声明AutowiredAnnotationBeanPostProcessor的Bean: <bean class="org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor "/> 使用 @Required注解,就必须声明RequiredAnnotationBeanPostProcessor的Bean: <bean class="org.springframework.beans.factory.annotation.RequiredAnnotationBeanPostProcessor"/> 类似地,使用@Resource、@PostConstruct、@PreDestroy等注解就必须声明 CommonAnnotationBeanPostProcessor;使用@PersistenceContext注解,就必须声明 PersistenceAnnotationBeanPostProcessor的Bean。   这样的声明未免太不优雅

RDD&Dataset&DataFrame

霸气de小男生 提交于 2020-01-01 15:01:20
Dataset创建 object DatasetCreation { def main(args: Array[String]): Unit = { val spark = SparkSession .builder() .appName("SparkSessionTest") .getOrCreate() import spark.implicits._ //1: range val ds1 = spark.range(0, 10, 2, 2) ds1.show() val dogs = Seq(Dog("jitty", "red"), Dog("mytty", "yellow")) val cats = Seq(new Cat("jitty", 2), new Cat("mytty", 4)) //2: 从Seq[T]中创建 val data = dogs val ds = spark.createDataset(data) ds.show() //3: 从RDD[T]中创建 val dogRDD = spark.sparkContext.parallelize(dogs) val dogDS = spark.createDataset(dogRDD) dogDS.show() val catRDD = spark.sparkContext.parallelize(cats)

Spring笔记4

陌路散爱 提交于 2020-01-01 12:50:04
Spring中的JdbcTemplate JdbcTemplate:他是spring框架中提供的一个对象,是对原始Jdbc API对象的简单封装。 JdbcTemplate的作用:用于和数据库交互的,实现对表的CRUD操作 JdbcTemplate的入门 导入相关的坐标 <packaging>jar</packaging> <dependencies> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context</artifactId> <version>4.2.8.RELEASE</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-jdbc</artifactId> <version>5.0.3.RELEASE</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-tx</artifactId> <version>5.0.3.RELEASE</version> </dependency> <dependency>

spring项目中使用alibaba.druid.pool.DruidDataSource来装载oracle数据源

无人久伴 提交于 2020-01-01 12:44:52
0、编写配置文件 jdbc.type=oracle jdbc.driver=oracle.jdbc.driver.OracleDriver jdbc.url=jdbc:oracle:thin:@192.168.2.9:1521/orcl jdbc.username=xbs jdbc.password=xbs 1、spring-context.xml中装载配置文件(记得把configName改成你的文件名称,一般问jdbc.properties或者项目名.properties) <!-- 加载应用属性实例,可通过 @Value("#{APP_PROP['jdbc.driver']}") String jdbcDriver 方式引用 --> <util:properties id="APP_PROP" location="classpath:configName.properties" local-override="true" /> 2、spring-contex.xmlt中配置数据源 <!-- 数据源配置, 使用 BoneCP 数据库连接池 --> <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource" init-method="init" destroy-method="close"> <!--

spring整合mybatis

♀尐吖头ヾ 提交于 2020-01-01 12:31:41
spring-mybatis整合: 1,mybatis原先有config.xml配置文件,核心是是通过SqlSessionFactory来操作数据库 2,所以Spring整合MyBatis 其实就是 将MyBatis的SqlSessionFactory 交给Spring 3,config.xml配置文件中配置的是数据库信息,sqlsessionFactory信息,将这些信息搬入spring配置文件中(spring-dao.xml) 4,以上信息配好还不够,sqlsessionFactory中还需要配置信息去操作数据库,与dao层联系 <!--告诉spring扫描映射文件 --> <property name="mapperLocations" value="classpath:com/briup/dao/*.xml"></property> spring-dao.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:aop="http://www.springframework.org/schema/aop"

采用多个数据源是Spring的配置

独自空忆成欢 提交于 2020-01-01 12:18:45
XML配置多多源文件: <?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:context="http://www.springframework.org/schema/context" xmlns:aop="http://www.springframework.org/schema/aop" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd http://www.springframework.org/schema/aop http://www.springframework.org

【SSM框架】Spring + Springmvc + Mybatis 基本框架搭建集成教程

跟風遠走 提交于 2020-01-01 12:18:20
本文将讲解SSM框架的基本搭建集成,并有一个简单demo案例 说明:1、本文暂未使用maven集成,jar包需要手动导入。    2、本文为基础教程,大神切勿见笑。    3、如果对您学习有帮助,欢迎各种转载,注明出处。    4、本文涉及源码和jar包下载地址: 一、导包 需要准备的包:   1、spring包   2、springmvc 包   3、mybatis 包 请自行下载导入,也可以去本人分享的网盘下载。 在lib目录创建spring,mybatis分类管理,将包复制进入各自的文件夹,并加载包。 二、配置文件 创建名为: config 的Source Folder文件夹。新建xml文件, 命名为: springmvc.xml 2.1springmvc.xml 配置    2.1.1、加入需要的beans标签库(aop.tx.context.mvc) <?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:p="http://www.springframework.org/schema/p" xmlns:aop=

How can I script an MS SQL Server database with proper object ordering?

别来无恙 提交于 2020-01-01 10:16:14
问题 I'm trying to script an MS SQL Server 2005 database to a single file. So far I've tried using SQL Management Studio and the MS Database Publishing Wizard. Both tools will script the database objects without a problem although neither tool is scripting objects in the right order of creation. For instance the script might script a view which requires a table that's not going to be created until later down the line. Do you know how to script the database schema with the proper order of object

XML Schema - only one element should have attribute set to true

懵懂的女人 提交于 2020-01-01 09:33:12
问题 How can i define an boolean attribute that can be set "true" only in one element. Following snippet must be invalid. <products> <product featured="yes">Prod 1</product> <product featured="yes">Prod 2</product> </products> 回答1: You can't do that with XML Schemas. You can define attributes on an element, but not limit them to one instance of the element. 回答2: You could add an attribute in products element indicating which product is featured. 回答3: You can't do this with XMLSchema. If you want