h2 | 易学教程

H2 and Oracle Compatiability issues

阅读更多关于 H2 and Oracle Compatiability issues

问题 I am having an issue executing the following script using Flyway and H2 database. I assume its a Oracle compatibility issue but I am using H2 with the correct mode. This script is used to construct my tables in production but I want to use an in-memory database for testing purposes. Setup and error below. I don't want rewrite the scripts for an in-memory database if thats possible. Jdbc.properties jdbc.driver=org.h2.Driver jdbc.url=jdbc:h2:file:target/firmsoftDB;MODE=Oracle jdbc.username=sa

H2 DB - Column must be in Group By list

阅读更多关于 H2 DB - Column must be in Group By list

问题 i am using H2-DB to access static databases... i have a table which looks like: COUNTRY STATE CITY LAT LNG COUNTRYID STATEID CITYID "Germany" "Berlin" "" 1.23 1.23 1 1 0 "Germany" "München" "" 1.23 1.23 1 2 0 "USA" "Alabama" "Auburn" 1.23 1.23 2 1 1 "USA" "Alabama" "Birmingham" 1.23 1.23 2 1 2 "USA" "Alaska" "Anchorage" 1.23 1.23 2 2 1 "USA" "Alaska" "Cordova" 1.23 1.23 2 2 2 its a huge list with lots of countries, most of them just have Country and State (like Germany here, whereas State's

Spring JavaConfig: Add mapping for custom Servlet

阅读更多关于 Spring JavaConfig: Add mapping for custom Servlet

问题 In a javaconfig-based Spring 4.0 project, how can I add a mapping for a certain URL to a Servlet other than the Spring DispatcherServlet. Im my case I want to use h2console from H2 database which is provided through the servlet org.h2.server.web.WebServlet Edit: In the upcoming Spring Boot 1.3 the h2console can be enabled with a configuration parameter: http://docs.spring.io/spring-boot/docs/current-SNAPSHOT/reference/htmlsingle/#boot-features-sql-h2-console Enabling it is as simple as adding

Access to h2 web console while running junit test in a Spring application

阅读更多关于 Access to h2 web console while running junit test in a Spring application

问题 I'm building a Spring application and I need to inspect my H2 in-memory database while I'm running my JUnit tests from a web browser. In my Spring configuration I have a bean which is responsible of creating my database schema and populating it with some data which will be used within my JUnit tests. I've also added a bean in my test context which creates a web server where I eventually will look for my data. <bean id="org.h2.tools.Server-WebServer" class="org.h2.tools.Server" factory-method=

Access to h2 web console while running junit test in a Spring application

阅读更多关于 Access to h2 web console while running junit test in a Spring application

Calling Persistence.createEntityManagerFactory > 1 time

阅读更多关于 Calling Persistence.createEntityManagerFactory > 1 time

问题 I have a servlet, and when I call this method with H2 specified in the PU, it re-creates all the database structure each time I call it. Can I only call this method 1 time, and if I can call it > 1 time, how do I do it? entityManagerFactory = Persistence .createEntityManagerFactory("MYPU"); XML for persistence <?xml version="1.0" encoding="UTF-8"?> <persistence version="2.1" xmlns="http://xmlns.jcp.org/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi

小蜜团队万字长文 | 讲透对话管理模型最新研究进展

阅读更多关于小蜜团队万字长文 | 讲透对话管理模型最新研究进展

【推荐】2019 Java 开发者跳槽指南.pdf(吐血整理) >>> 对话管理模型背景从人工智能研究的初期开始，人们就致力于开发高度智能化的人机对话系统。艾伦·图灵（Alan Turing）在1950年提出图灵测试[1]，认为如果人类无法区分和他对话交谈的是机器还是人类，那么就可以说机器通过了图灵测试，拥有高度的智能。第一代对话系统主要是基于规则的对话系统，例如1966年MIT开发的ELIZA系统[2]是一个利用模版匹配方法的心理医疗聊天机器人，再如1970年代开始流行的基于流程图的对话系统，采用有限状态自动机模型建模对话流中的状态转移。它们的优点是内部逻辑透明，易于分析调试，但是高度依赖专家的人工干预，灵活性和可拓展性很差。随着大数据技术的兴起，出现了基于统计学方法的数据驱动的第二代对话系统（以下简称统计对话系统）。在这个阶段，增强学习也开始被广泛研究运用，其中最具代表性的是剑桥大学Steve Young教授于2005年提出的基于部分可见马尔可夫决策过程(Partially Observable Markov Decision Process , POMDP)的统计对话系统[3]。该系统在鲁棒性上显著地优于基于规则的对话系统，它通过对观测到的语音识别结果进行贝叶斯推断，维护每轮对话状态，再根据对话状态进行对话策略的选择，从而生成自然语言回复。POMDP-based

H2 DB in docker container

阅读更多关于 H2 DB in docker container

问题 I am running a very basic spring boot app in an alpine docker container with in memory H2 database on AWS . Unfortunately, webAllowOthers is not set, so i cannot access the H2 console. Is there any way to access the data in the db? I can sh into the container, but i dont know how to continue. 回答1: Ok, I managed to solve it, in case anybody needs it in the future: The H2 console has a tool to back up any DB to a .sql file ( accessible in the TOOLS menu ), but since the in memory DB only exists

H2 DB in docker container

阅读更多关于 H2 DB in docker container

Spring Boot with in memory database fails

阅读更多关于 Spring Boot with in memory database fails

问题 I'm trying to test my Spring Boot application with an embedded database h2. As for dev and prod, I will be using a MySQL database. I would like to have different application.yml and schema.sql file for each mode. The project structure is: src --main ----resources ------application.yml ------schema.sql --test ----resources ------application-test.yml ------schema-test.sql This is my RespositoryTest : @RunWith(SpringJUnit4ClassRunner.class) @SpringBootTest @DataJpaTest public class