spring data jpa example

-define the location of the JSP file - Beanclass= "Org.springframework.web.servlet.view.InternalResourceViewResolver"> Propertyname= "prefix"value= "/web-inf/views/"/> Propertyname= "suffix"value= ". jsp"/> Propertyname= "Viewnames">Array>valuetype= "Java.lang.String">login*value>Array> Property> Bean>If you have multiple file paths (for example: webapp/), you can define multiple resolver, configure different viewnames

It is convenient to save query data using JPA, in addition to adding data to your code, you can import using SQL. At the moment I only have a way to centralize the data in a single SQL file.and data in the import often has a succession of relations, need to be imported in a

Spring 4 + jpa (hibernate 3/4) + spring mvc multi-data source configuration (2) + Druid connection pool, mvcdruid Pick up a blog post (http://www.loveweir.com/html/18.html), no database connection pool, purely using the official link of jpa. Therefore, we need to add the con

page numbersGetPageSize--Paging sizeGetOffset---offsetGetsort--Get sort informationFor the generation of pageable, it is also very easy to use org.springframework.data.domain.PageRequest This implementation class, the construction method can be generated, there is no second implementation class. Set the sort, pagenumber, getpagesize.The offset does not allow setting, which is automatically set at query time by calculating the page number and paging size.For the method return value: Page, the im

Next to a blog post, there is no database connection pool, purely with the official JPA link. So this time we're going to add a connection pool. This article uses Druid Connection pool to implement multi-data source configuration. Persistence.xml This file can be omitted, all configured in Applicationcontext.xml: other places do not need to be changed by the last configuration. That's good. reprinted from

@NoRepositoryBean: Spring Data JPA does not instantiate this interface when it is started BaseRepository1. Common interface:Import org.springframework.data.jpa.repository.JpaRepository; Import Org.springframework.data.jpa.repository.JpaSpecificationExecutor; Import Org.springframework.data.repository.NoRepositoryBean; /** * Generic DAO interface * */ @NoReposit

=requestmethod.get) Public@ResponseBody listGetAll () {iterableGradeservice.getall (); IteratorAll.iterator (); ListNewArraylist(); while(Iterator.hasnext ()) {Grade Grade=Iterator.next (); Grades.add (grade); } returngrades; }}5. Spring Boot entry Package com.example; Import org.springframework.boot.SpringApplication; Import org.springframework.boot.autoconfigure.SpringBootApplication; @SpringBootApplication Public class hctspringboo

Spring Data JPA calls the stored procedure instance Chszs and cannot be reproduced without the permission of the blogger. Permission to reprint should be marked by the author and blog home: Http://blog.csdn.net/chszsThe need for JPA to connect to a database and invoke stored procedures is common. This article describes

Spring-Data-Jpa environment configuration and practical application, Last time we talked about Spring-Data-Jpa overview and interface, next we will talk about Spring-

Spring-data-jpaThe JPA (Java persistence API) defines a series of criteria for object persistence,At present, the implementation of this specification of products have hibernate, TopLink and so on.The spring data JPA framework, wh

I. Overview　　Official website: https://projects.spring.io/spring-data-jpa/　　1. What is SPRING-DATA-JPA 　　Spring data

Programming at ordinary times, in addition to writing pages, it is also annoying to repeatedly write some SQL statements in dao. Recently, it was found that spring data jpa is very useful, it can minimize the number of times we write SQL statements. Some simple SQL statements can be automatically parsed into SQL statements based on the Interface Name, which great

The interface provided by spring data JPA is also the core concept of spring data JPA: 1:repository: The topmost interface is an empty interface that is designed to unify all Repository types and to automatically recognize compone

1. Introduction of two dependenciesDependency> groupId>Org.springframework.bootgroupId> Artifactid>Spring-boot-starter-data-jpaArtifactid>Dependency>Dependency> groupId>MysqlgroupId> Artifactid>Mysql-connector-javaArtifactid>Dependency>2. Modify the data source configurationSpring: Profiles: active:dev JPA

1. Create a Spring boot project2. Save Wait Build complete3, add SPRING-BOOT-STARTER-DATA-JPA, Memory database dependency package Hsqldb Pom.xmlxsi:schemalocation= "http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd" > forSpring BootSpring-boot-starter-inherit from the parent project

taskname, Long ID); Here we say that spring data JPA's query strategy, spring data JPA can be queried using the creation method, or can be queried using the @query annotation, if @query is used on the method of the naming specification, the

two problems with the project before.AndSpring Data JPACombineI would like to Spring Data JPA JPA use an entity class in (hereinafter, but in JPA fact, a specification) @Entity as a type of LocalDateTime attribute, such as:@Entit

interfaceThis interface is the most basic interface, just a symbolic interface, there is no definition of any method, then what is the use of this interface? Since spring data JPA provides this interface, naturally it has its usefulness, for example, we do not want to provide some of the methods, such as we just want

("-------------------------------------------"); System. out. println ("Create a Sort object by creating a collection of Sort.order objects"); ListNewArraylist(); Orders.add (NewSort.order (Sort.Direction.DESC,"ID")); Orders.add (NewSort.order (Sort.Direction.ASC,"FirstName")); List"Bauer",NewSort (orders)); for(Customer customer:result3) {System. out. println (Customer.tostring ()); } System. out. println ("-------------------------------------------");}A total of four sorting methods are lis

the operation):customerRepository.findAll(where(customerHasBirthday()).and(isLongTermCustomer()));QuerydslOpen Source Project QUERYDSL also provides a simplified template code implementation, you need to pom.xml add QUERYDSL package, and then add plug-ins to implement the automatic creation of query classes under each source package such as QCustomer .The query code is as follows:BooleanExpression customerHasBirthday = customer.birthday.eq(today);BooleanExpression isLongTermCustomer = customer.