spring data hadoop boot example

' ( ' id ' bigint not null auto_increment, ' name ' varchar (255) NULL, ' age ' int NULL, PRIMARY KEY (' id ') ); INSERT into info (name,age) VALUES (' Mick ', ' a '); INSERT into info (name,age) VALUES (' Mick1 ', ' a '); INSERT into info (name,age) VALUES (' Mickjoust1 ', ' + '); INSERT into info (name,age) VALUES (' Joust ', ' 22 '); Start View Homepage: http://localhost:8080View database data: Http://localhost:8080/show Summary This chapter

various types of simple additions and deletions, spring data provides a direct query based on the proxy method, nothing needs to do, the only need to write interfaces, naming methods, this part is too convenient, and simple query to solve almost 80% of the problem. This part is relatively simple, do not repeat, refer to the use of the Daquan section. Because of the implementation of the template DAO, so th

widely used in domestic and foreign internet companies.The biggest feature of MongoDB is the support of the query language is very powerful, its syntax is somewhat similar to the object-oriented query language, almost can achieve similar relational database single-table query most of the functions, but also support the indexing of data. MongoDB's implementation of high-availability and read-write load balancing is very concise and friendly, and Mongo

Recently work too busy, so delay to everyone to share the actual combat springboot framework of use.The following is the use of spring boot to integrate multiple frameworks.The first is to prepare for the job well.First, the package required to import the framework, we use the thing Maven to manage the package.The above example is my h5ds real background manageme

In practice, we will need to load some data or do something like this when the project service is started.To solve this problem, Spring Boot provides a way for us to implement the interface Commandlinerunner.It's simple, you just need one class, no other configuration.To create a class that implements interface Commandlinerunner PackageOrg.springboot.sample.runne

(Entitymanagerfactorybuilder builder) {Return Builder.datasource (Primarydatasource). Properties (Getvendorproperties (Primarydatasource)). Packages (" COM.ZH.SPRINGBOOTDEMO.DOMAIN.P ")//Set the entity class where. Persistenceunit ("Primarypersistenceunit"). Build ();}@AutowiredPrivate Jpaproperties jpaproperties;Private mapReturn jpaproperties.gethibernateproperties (DataSource);}@Primary@Bean (name = "Transactionmanagerprimary")Public Platformtransactionmanager transactionmanagerprimary (Enti

Jpaproperties.gethibernateproperties (DataSource); } @Bean (name = " Transactionmanagersecondary ") Platformtransactionmanager transactionmanagersecondary ( Entitymanagerfactorybuilder builder) { return new Jpatransactionmanager (Entitymanagerfactorysecondary (builder). GetObject ()); } /span> 4 UseDAO (repo) from different databases can be injected into any other bean at this time.@ControllerPublicclass testcontroller { @ Autowired SYSROLEREPO1 sysrolerepo1; @Autowired Sys

) Official document: Docs.spring.io/spring-data/jpa/docs/2.0.9.release/reference/html/#jpa. Repositories3.3 Custom SQL statement queries For the user to write Sql,spring Boot JPA is also very good support, only need to add @query (SQL). Example code: @Transaction

is Spring Data JPA capable of?can greatly simplify the The JPA notation enables access to and manipulation of data in situations where there is little or no write implementation. except CRUD , it also includes some common functions such as paging, sorting, and so on. first of all, we need to be clear Spring

Spring boot rest example Introduction: This article will help you use Spring Boot to create simple REST services. You will learn What is a REST service? How to Use Spring Initializr to guide the creation of Rest service appli