spring-data

问题 I have an Entity like below: @Entity public class Order { @Id private String orderId; @Temporal(TemporalType.TIMESTAMP) @Column(name = "created_at", nullable = false) private Date created; @Temporal(TemporalType.TIMESTAMP) @Column(name = "updated_at", nullable = false) private Date updated; @PrePersist protected void onCreate() { this.created = new Date(); this.updated = this.created; } @PreUpdate protected void onUpdate() { this.updated = new Date(); } } I have to find all the orders that

问题 I am new to using spring boot. I am trying to create a REST API with apache derby as an embedded database but I get this error: "Error creating bean with name 'entityManagerFactory'". pom.xml : http://maven.apache.org/xsd/maven-4.0.0.xsd"> 4.0.0 <groupId>com.restapi</groupId> <artifactId>restApi</artifactId> <version>0.0.1-SNAPSHOT</version> <packaging>jar</packaging> <name>restApi</name> <description>Demo project for Rest API with spring boot</description> <parent> <groupId>org

问题 I am using spring data jpa with db2. My first set of record is coming. But when i do the next, it is giving me error. I guess it may be because of db2. When I use index 0 it is working fine. But when i use index 1 then it is giving data access exception. On second page I am getting below error my pageable object Pageable pageable = new PageRequest(2, 10, Direction.ASC, "messageId"), because of this 2(As it is mentioning that index should be 0), it is throwing the below error com.ibm.db2.jcc

问题 I was confident that Spring Data and Spring Data JPA refers as same, but then I watched a tutorial on youtube about Spring Data and he is using JdbcTemplate in that tutorial. So I got confused there. I want to clarify that what is difference between Spring Data and JdbcTemplate ? JdbcTemplate and Spring Data JPA are parts of Spring Data ? 回答1: JdbcTemplate is part of the Spring Framework itself. Spring Data is the project which consists of multiple sub-projects where Spring Data JPA is one of

问题 I was confident that Spring Data and Spring Data JPA refers as same, but then I watched a tutorial on youtube about Spring Data and he is using JdbcTemplate in that tutorial. So I got confused there. I want to clarify that what is difference between Spring Data and JdbcTemplate ? JdbcTemplate and Spring Data JPA are parts of Spring Data ? 回答1: JdbcTemplate is part of the Spring Framework itself. Spring Data is the project which consists of multiple sub-projects where Spring Data JPA is one of

问题 I was confident that Spring Data and Spring Data JPA refers as same, but then I watched a tutorial on youtube about Spring Data and he is using JdbcTemplate in that tutorial. So I got confused there. I want to clarify that what is difference between Spring Data and JdbcTemplate ? JdbcTemplate and Spring Data JPA are parts of Spring Data ? 回答1: JdbcTemplate is part of the Spring Framework itself. Spring Data is the project which consists of multiple sub-projects where Spring Data JPA is one of

问题 In my current project I'm using Spring Data JPA and I have more than 20 @Entity classes. I want to create repositories for them, but creating another classes, each for any model, with @Repository annotation seems to be some kind of overkill and a lot of "repeated" code - all repository classes will look like: @Repository public interface SomeModelRepository extends CrudRepository<SomeModel, Long> { } There is any way to create "automagically" those repositories? And specify only those that I

问题 i have an application thats build on Spring boot, using JPA repositories on HSQL database. Problem is that while application is running, I create an entity,and it's persisted correctly to database(can be seen in database manager). But after application shutdown from eclipse, all data is removed; Saving is performed like this @Service public class NotificationService { @Autowired private NotificationRepository notificationRepository; public void notifyRefreshArticles(){ Notification

问题 i have an application thats build on Spring boot, using JPA repositories on HSQL database. Problem is that while application is running, I create an entity,and it's persisted correctly to database(can be seen in database manager). But after application shutdown from eclipse, all data is removed; Saving is performed like this @Service public class NotificationService { @Autowired private NotificationRepository notificationRepository; public void notifyRefreshArticles(){ Notification

问题 i have an application thats build on Spring boot, using JPA repositories on HSQL database. Problem is that while application is running, I create an entity,and it's persisted correctly to database(can be seen in database manager). But after application shutdown from eclipse, all data is removed; Saving is performed like this @Service public class NotificationService { @Autowired private NotificationRepository notificationRepository; public void notifyRefreshArticles(){ Notification