无法将值插入 h2 数据库 table
Unable to insert values into h2 database table
我正在尝试 运行 一个代码来获取具有给定 ID 的用户的详细信息。
这是我的代码。
package com.in28minutes.database.databasedemo;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.CommandLineRunner;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import com.in28minutes.database.databasedemo.jpa.PersonJpaRepository;
@SpringBootApplication
public class JpaDemoApplication implements CommandLineRunner {
private Logger logger = LoggerFactory.getLogger(this.getClass());
@Autowired
PersonJpaRepository repository;
public static void main(String[] args) {
SpringApplication.run(JpaDemoApplication.class, args);
}
@Override
public void run(String... args) throws Exception {
logger.info("User id 10001 -> {}", repository.findById(10001));
}
}
这是我的存储库：
package com.in28minutes.database.databasedemo.jpa;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
import javax.transaction.Transactional;
import org.springframework.stereotype.Repository;
import com.in28minutes.database.databasedemo.entity.Person;
@Repository
@Transactional
public class PersonJpaRepository {
//connect to the database
@PersistenceContext
EntityManager entityManager;
public Person findById(int id) {
return entityManager.find(Person.class, id);
}
}
package com.in28minutes.database.databasedemo.entity;
import java.util.Date;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
@Entity
public class Person {
@Id
@GeneratedValue
private int id;
private String name;
private String location;
private Date birthDate;
public Person() {
}
public Person(int id, String name, String location, Date birthDate) {
super();
this.id = id;
this.name = name;
this.location = location;
this.birthDate = birthDate;
}
public Person(String name, String location, Date birthDate) {
super();
this.name = name;
this.location = location;
this.birthDate = birthDate;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getLocation() {
return location;
}
public void setLocation(String location) {
this.location = location;
}
public Date getBirthDate() {
return birthDate;
}
public void setBirthDate(Date birthDate) {
this.birthDate = birthDate;
}
@Override
public String toString() {
return String.format("\nPerson [id=%s, name=%s, location=%s, birthDate=%s]", id, name, location, birthDate);
}
}
这是我的架构
create table person
(
id integer not null,
name varchar(255) not null,
location varchar(255),
birth_date timestamp,
primary key(id)
);
INSERT INTO PERSON (ID, NAME, LOCATION, BIRTH_DATE )
VALUES(10001, 'Ranga', 'Hyderabad',sysdate());
INSERT INTO PERSON (ID, NAME, LOCATION, BIRTH_DATE )
VALUES(10002, 'James', 'New York',sysdate());
INSERT INTO PERSON (ID, NAME, LOCATION, BIRTH_DATE )
VALUES(10003, 'Pieter', 'Amsterdam',sysdate());
我的 application.properties 里也有 spring.h2.console.enabled=true。
2021-10-17 04:17:53.745 INFO 17096 --- [ main] c.i.d.databasedemo.JpaDemoApplication : Starting JpaDemoApplication using Java 16.0.2 on DESKTOP-Q0GM1GU with PID 17096 (C:\Users\HP\Desktop\database-demo\target\classes started by HP in C:\Users\HP\Desktop\database-demo)
2021-10-17 04:17:53.750 INFO 17096 --- [ main] c.i.d.databasedemo.JpaDemoApplication : No active profile set, falling back to default profiles: default
2021-10-17 04:17:55.170 INFO 17096 --- [ main] .s.d.r.c.RepositoryConfigurationDelegate : Bootstrapping Spring Data JPA repositories in DEFAULT mode.
2021-10-17 04:17:55.210 INFO 17096 --- [ main] .s.d.r.c.RepositoryConfigurationDelegate : Finished Spring Data repository scanning in 14 ms. Found 0 JPA repository interfaces.
2021-10-17 04:17:57.110 INFO 17096 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat initialized with port(s): 8080 (http)
2021-10-17 04:17:57.130 INFO 17096 --- [ main] o.apache.catalina.core.StandardService : Starting service [Tomcat]
2021-10-17 04:17:57.130 INFO 17096 --- [ main] org.apache.catalina.core.StandardEngine : Starting Servlet engine: [Apache Tomcat/9.0.54]
2021-10-17 04:17:57.417 INFO 17096 --- [ main] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext
2021-10-17 04:17:57.418 INFO 17096 --- [ main] w.s.c.ServletWebServerApplicationContext : Root WebApplicationContext: initialization completed in 3557 ms
2021-10-17 04:17:57.512 INFO 17096 --- [ main] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Starting...
2021-10-17 04:17:57.924 INFO 17096 --- [ main] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Start completed.
2021-10-17 04:17:57.968 INFO 17096 --- [ main] o.s.b.a.h2.H2ConsoleAutoConfiguration : H2 console available at '/h2-console'. Database available at 'jdbc:h2:mem:0af42eb0-d2fc-45af-ad68-57b087b53fc0'
2021-10-17 04:17:58.592 INFO 17096 --- [ main] o.hibernate.jpa.internal.util.LogHelper : HHH000204: Processing PersistenceUnitInfo [name: default]
2021-10-17 04:17:58.733 INFO 17096 --- [ main] org.hibernate.Version : HHH000412: Hibernate ORM core version 5.6.0.Final
2021-10-17 04:17:59.180 INFO 17096 --- [ main] o.hibernate.annotations.common.Version : HCANN000001: Hibernate Commons Annotations {5.1.2.Final}
2021-10-17 04:17:59.662 INFO 17096 --- [ main] org.hibernate.dialect.Dialect : HHH000400: Using dialect: org.hibernate.dialect.H2Dialect
Hibernate: drop table if exists person CASCADE
Hibernate: drop sequence if exists hibernate_sequence
Hibernate: create sequence hibernate_sequence start with 1 increment by 1
Hibernate: create table person (id integer not null, birth_date timestamp, location varchar(255), name varchar(255), primary key (id))
2021-10-17 04:18:01.342 INFO 17096 --- [ main] o.h.e.t.j.p.i.JtaPlatformInitiator : HHH000490: Using JtaPlatform implementation: [org.hibernate.engine.transaction.jta.platform.internal.NoJtaPlatform]
2021-10-17 04:18:01.368 INFO 17096 --- [ main] j.LocalContainerEntityManagerFactoryBean : Initialized JPA EntityManagerFactory for persistence unit 'default'
2021-10-17 04:18:01.656 WARN 17096 --- [ main] JpaBaseConfiguration$JpaWebConfiguration : spring.jpa.open-in-view is enabled by default. Therefore, database queries may be performed during view rendering. Explicitly configure spring.jpa.open-in-view to disable this warning
2021-10-17 04:18:02.194 WARN 17096 --- [ main] o.s.w.s.r.ResourceHttpRequestHandler : Locations list is empty. No resources will be served unless a custom ResourceResolver is configured as an alternative to PathResourceResolver.
2021-10-17 04:18:02.550 INFO 17096 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat started on port(s): 8080 (http) with context path ''
2021-10-17 04:18:02.568 INFO 17096 --- [ main] c.i.d.databasedemo.JpaDemoApplication : Started JpaDemoApplication in 9.623 seconds (JVM running for 10.727)
Hibernate: select person0_.id as id1_0_0_, person0_.birth_date as birth_da2_0_0_, person0_.location as location3_0_0_, person0_.name as name4_0_0_ from person person0_ where person0_.id=?
2021-10-17 04:18:02.770 INFO 17096 --- [ main] ication$$EnhancerBySpringCGLIB$f304a0c : User id 10001 -> null
但是，在我的结果中，我将值返回为 null。另外，我知道我应该得到一个错误，指出 table PERSON 已经存在并且不应在模式中声明它，但事实并非如此。
检查 h2 数据库后，我看到插入了 none 个值。
您可以尝试将 spring.jpa.hibernate.ddl-auto=create 添加到您的 属性 文件中。您可以查看 question here in Whosebug or from the documentation.
我正在尝试 运行 一个代码来获取具有给定 ID 的用户的详细信息。
这是我的代码。
package com.in28minutes.database.databasedemo;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.CommandLineRunner;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import com.in28minutes.database.databasedemo.jpa.PersonJpaRepository;
@SpringBootApplication
public class JpaDemoApplication implements CommandLineRunner {
private Logger logger = LoggerFactory.getLogger(this.getClass());
@Autowired
PersonJpaRepository repository;
public static void main(String[] args) {
SpringApplication.run(JpaDemoApplication.class, args);
}
@Override
public void run(String... args) throws Exception {
logger.info("User id 10001 -> {}", repository.findById(10001));
}
}
这是我的存储库：
package com.in28minutes.database.databasedemo.jpa;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
import javax.transaction.Transactional;
import org.springframework.stereotype.Repository;
import com.in28minutes.database.databasedemo.entity.Person;
@Repository
@Transactional
public class PersonJpaRepository {
//connect to the database
@PersistenceContext
EntityManager entityManager;
public Person findById(int id) {
return entityManager.find(Person.class, id);
}
}
package com.in28minutes.database.databasedemo.entity;
import java.util.Date;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
@Entity
public class Person {
@Id
@GeneratedValue
private int id;
private String name;
private String location;
private Date birthDate;
public Person() {
}
public Person(int id, String name, String location, Date birthDate) {
super();
this.id = id;
this.name = name;
this.location = location;
this.birthDate = birthDate;
}
public Person(String name, String location, Date birthDate) {
super();
this.name = name;
this.location = location;
this.birthDate = birthDate;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getLocation() {
return location;
}
public void setLocation(String location) {
this.location = location;
}
public Date getBirthDate() {
return birthDate;
}
public void setBirthDate(Date birthDate) {
this.birthDate = birthDate;
}
@Override
public String toString() {
return String.format("\nPerson [id=%s, name=%s, location=%s, birthDate=%s]", id, name, location, birthDate);
}
}
这是我的架构
create table person
(
id integer not null,
name varchar(255) not null,
location varchar(255),
birth_date timestamp,
primary key(id)
);
INSERT INTO PERSON (ID, NAME, LOCATION, BIRTH_DATE )
VALUES(10001, 'Ranga', 'Hyderabad',sysdate());
INSERT INTO PERSON (ID, NAME, LOCATION, BIRTH_DATE )
VALUES(10002, 'James', 'New York',sysdate());
INSERT INTO PERSON (ID, NAME, LOCATION, BIRTH_DATE )
VALUES(10003, 'Pieter', 'Amsterdam',sysdate());
我的 application.properties 里也有 spring.h2.console.enabled=true。
2021-10-17 04:17:53.745 INFO 17096 --- [ main] c.i.d.databasedemo.JpaDemoApplication : Starting JpaDemoApplication using Java 16.0.2 on DESKTOP-Q0GM1GU with PID 17096 (C:\Users\HP\Desktop\database-demo\target\classes started by HP in C:\Users\HP\Desktop\database-demo)
2021-10-17 04:17:53.750 INFO 17096 --- [ main] c.i.d.databasedemo.JpaDemoApplication : No active profile set, falling back to default profiles: default
2021-10-17 04:17:55.170 INFO 17096 --- [ main] .s.d.r.c.RepositoryConfigurationDelegate : Bootstrapping Spring Data JPA repositories in DEFAULT mode.
2021-10-17 04:17:55.210 INFO 17096 --- [ main] .s.d.r.c.RepositoryConfigurationDelegate : Finished Spring Data repository scanning in 14 ms. Found 0 JPA repository interfaces.
2021-10-17 04:17:57.110 INFO 17096 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat initialized with port(s): 8080 (http)
2021-10-17 04:17:57.130 INFO 17096 --- [ main] o.apache.catalina.core.StandardService : Starting service [Tomcat]
2021-10-17 04:17:57.130 INFO 17096 --- [ main] org.apache.catalina.core.StandardEngine : Starting Servlet engine: [Apache Tomcat/9.0.54]
2021-10-17 04:17:57.417 INFO 17096 --- [ main] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext
2021-10-17 04:17:57.418 INFO 17096 --- [ main] w.s.c.ServletWebServerApplicationContext : Root WebApplicationContext: initialization completed in 3557 ms
2021-10-17 04:17:57.512 INFO 17096 --- [ main] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Starting...
2021-10-17 04:17:57.924 INFO 17096 --- [ main] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Start completed.
2021-10-17 04:17:57.968 INFO 17096 --- [ main] o.s.b.a.h2.H2ConsoleAutoConfiguration : H2 console available at '/h2-console'. Database available at 'jdbc:h2:mem:0af42eb0-d2fc-45af-ad68-57b087b53fc0'
2021-10-17 04:17:58.592 INFO 17096 --- [ main] o.hibernate.jpa.internal.util.LogHelper : HHH000204: Processing PersistenceUnitInfo [name: default]
2021-10-17 04:17:58.733 INFO 17096 --- [ main] org.hibernate.Version : HHH000412: Hibernate ORM core version 5.6.0.Final
2021-10-17 04:17:59.180 INFO 17096 --- [ main] o.hibernate.annotations.common.Version : HCANN000001: Hibernate Commons Annotations {5.1.2.Final}
2021-10-17 04:17:59.662 INFO 17096 --- [ main] org.hibernate.dialect.Dialect : HHH000400: Using dialect: org.hibernate.dialect.H2Dialect
Hibernate: drop table if exists person CASCADE
Hibernate: drop sequence if exists hibernate_sequence
Hibernate: create sequence hibernate_sequence start with 1 increment by 1
Hibernate: create table person (id integer not null, birth_date timestamp, location varchar(255), name varchar(255), primary key (id))
2021-10-17 04:18:01.342 INFO 17096 --- [ main] o.h.e.t.j.p.i.JtaPlatformInitiator : HHH000490: Using JtaPlatform implementation: [org.hibernate.engine.transaction.jta.platform.internal.NoJtaPlatform]
2021-10-17 04:18:01.368 INFO 17096 --- [ main] j.LocalContainerEntityManagerFactoryBean : Initialized JPA EntityManagerFactory for persistence unit 'default'
2021-10-17 04:18:01.656 WARN 17096 --- [ main] JpaBaseConfiguration$JpaWebConfiguration : spring.jpa.open-in-view is enabled by default. Therefore, database queries may be performed during view rendering. Explicitly configure spring.jpa.open-in-view to disable this warning
2021-10-17 04:18:02.194 WARN 17096 --- [ main] o.s.w.s.r.ResourceHttpRequestHandler : Locations list is empty. No resources will be served unless a custom ResourceResolver is configured as an alternative to PathResourceResolver.
2021-10-17 04:18:02.550 INFO 17096 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat started on port(s): 8080 (http) with context path ''
2021-10-17 04:18:02.568 INFO 17096 --- [ main] c.i.d.databasedemo.JpaDemoApplication : Started JpaDemoApplication in 9.623 seconds (JVM running for 10.727)
Hibernate: select person0_.id as id1_0_0_, person0_.birth_date as birth_da2_0_0_, person0_.location as location3_0_0_, person0_.name as name4_0_0_ from person person0_ where person0_.id=?
2021-10-17 04:18:02.770 INFO 17096 --- [ main] ication$$EnhancerBySpringCGLIB$f304a0c : User id 10001 -> null
但是，在我的结果中，我将值返回为 null。另外，我知道我应该得到一个错误，指出 table PERSON 已经存在并且不应在模式中声明它，但事实并非如此。
检查 h2 数据库后，我看到插入了 none 个值。
您可以尝试将 spring.jpa.hibernate.ddl-auto=create 添加到您的 属性 文件中。您可以查看